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375 - Pulse or digital communications

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Class / Patent application numberDescriptionNumber of patent applications / Date published
375296000 Antinoise or distortion (includes predistortion) 414
375302000 Angle modulation 118
375298000 Quadrature amplitude modulation 109
375299000 Plural diversity 84
375300000 Amplitude modulation 63
375309000 Keying circuits 5
20120263258CIRCUITS AND METHODS FOR PROVIDING A CONTROL VOLTAGE AND IMPROVING SWITCH PERFORMANCE IN RADIO FREQUENCY (RF) MODULES - An apparatus comprises at least one transmit amplifier and rectification circuitry located in the at least one transmit amplifier, which is configured to receive a RF signal and provide a rectified voltage, which is selectably added to a voltage supplied by a battery to generate a DC voltage supply signal that is a function of RF power level. A controller is configured to select between providing the VBAT or the VSupply signal to a transmit switch depending on one or more of a logic state and a mode of operation. An alternate apparatus comprises a charge pump circuit configured to quickly raise a voltage supplied to it and store the output voltage on a capacitor and then either shift a first frequency provided by a charge pump oscillator to a lower second frequency or turn off a charge pump clock to maintain a voltage on the capacitor during a transmit mode.10-18-2012
20090316832Increasing Channel Capacity Without Needing to Reduce Signal to Noise Margin Due to Inter-Symbol Interference (ISI) by Using Three States +1, -1 and NO - Basic idea is that in addition to sending +1 and −1 a third state is sent. This third state is a lack of any transmission whatsoever. Suggests sending frequency 0 for symbol 0, frequency 1 for symbol 1, frequency 2 for symbol 2, frequency 0 & frequency 1 for symbol 3 etc. Also suggests using 2 frequencies and phase modulating each. Frequency 1 has 2 possible phase states and frequency 2 has 2 possible phase states, therefore 4 bits can be coded. If send only frequency 2 with its two phase states, this enables us to send two more bits. If send neither frequency 1, nor frequency 2 this indicates 1 other bit state. Therefore 8 bits can be coded.12-24-2009
20110249772TRANSMITTER, MULTICARRIER TRANSMITTING METHOD, AND RECEIVER - A transmitter modulates for each symbol period a plurality of carriers that include a carrier group that is consisted of a plurality of prescribed carriers, and repeatedly transmits control information in cycles by using the carrier group. The transmitter transmits multiple-bit binary data of the control information in each symbol period, thereby transmitting the control information once in each of the cycles that includes at least one symbol period. The transmitter controls the transmission unit to switch, within the carrier group, for each of the cycles, carriers of bits of the control information, according to a prescribed rule.10-13-2011
20100046670Method and Apparatus for Multiple Bit Encoding - Methods and apparatus for encoding data for wireless transmission are disclosed in which a data message may be encoded into a transmission code as a first coding format and a second coding format. The first coding format characterized by a first bit representation and the second coding format characterized by a second bit representation different from the first bit representation. The transmission code may be transmitted having the first and second coding formats.02-25-2010
20110075763LOCAL WIRELESS SIGNAL TRANSMITTING/RECEIVING APAPRATUS AND METHOD USING DIGITAL RADIO FREQUENCY PROCESSING TECHNOLOGY - A local wireless signal transmitting/receiving apparatus and method using digital RF processing technology. When the local wireless signal transmitting/receiving apparatus generates a local wireless signal to be transmitted, spreads the frequency of the generated local wireless signal and thereby generates a baseband signal, the local wireless signal transmitting/receiving apparatus converts the baseband signal of the local wireless signal into phase information, converts the phase information into an RF signal by means of a polar modulator, and transmits the RF signal.03-31-2011
Entries
DocumentTitleDate
20110176634METHOD AND APPARATUS FOR ALLOCATING CHANNEL STATE INFORMATION-REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Disclosed are an apparatus for Channel State Information-Reference Signal (CSI-RS) allocation and a method for CSI-RS transmission using the same in a wireless communication system. A CSI-RS for each antenna port is allocated to REs or subcarriers on a basis of a symbol or symbol axis in a subframe or Resource Block (RB), and is allocated in such a manner that a distance between neighboring CSI-RS allocation REs or subcarriers may be 3 REs or subcarriers. Accordingly, in the range of following CSI-RS transmission overhead, CSI-RSs are allocated to a time-frequency resource domain in such a manner so as to have perfect orthogonality or quasi-orthogonality according to cells or cell groups. Then, the CSI-RSs, which have been allocated to the time-frequency resource domain, are transmitted.07-21-2011
20130044834FLEXIBLE TRANSMISSION OF MESSAGES IN A WIRELESS COMMUNICATION SYSTEM - Devices and methods for transmitting information in resource blocks between a base station and one or more communication devices are disclosed. In each resource block (RB) used for a data or control channel transmission, a plurality of non-overlapping regions of resource elements (REs) are defined. Each region is associated with one or multiple unique reference symbols (RSs). When user equipment (UE) demodulates the information it receives in a particular region of a resource block (RB), it uses the reference symbol (RS) associated with that region. The reference symbol (RS) information may be used, for example, to estimate a channel of the communication network or to demodulate and decode the data contained within the associated regions.02-21-2013
20120201328DIGITAL BROADCASTING METHOD - According to an exemplary embodiment of the invention, a digital data stream is divided into at least two complementary digital substreams and delayed in time. The first digital substream and the second digital substream are transmitted by the broadcasting systems with a time offset in accordance with the broadcasting principle such that any receiver can use the respectively intact part of the other complementary digital substream in order to ensure a seamless media reception when a break in the transmission or reception occurs.08-09-2012
20130028347OFDM MODULATOR, OFDM TRANSMISSION DEVICE, AND OFDM MODULATION METHOD - A transmission device 01-31-2013
20100061479WIRELESS COMMUNICATION OF DATA SYMBOLS - A transmitter generates a constellation pattern comprising replications of a first constellation. Each replication has a replication offset relative to a neighbouring replication and alternates between corresponding to the first constellation and an axis mirrored constellation (mirrored around the real and/or imaginary axis). The transmitter selects from the pattern such that a symbol for a data value corresponding to a first constellation point of the first constellation is selected from all replications of this constellation point. The constellation point resulting in the lowest transmit power for a combination of a plurality of antennas may be selected. A receiver receives the selected symbol and provides a folding operation to compensate for replications and mirroring. The replication offset may be lower than the minimum distance between symbols in the first constellation thereby resulting in an improved trade off between transmit power and error probability, e.g. in a Multiple Input Multiple Output system.03-11-2010
20130044835Data blocks encoding and transmission over a diversity communication network - The invention relates to a method of transmitting a data unit over a plurality of transmission paths of a wireless communication system that is adapted to minimize bandwidth usage and energy consumption while maintaining transmission robustness. A method of transmitting K data blocks of a data unit comprises the steps of encoding the data unit into an encoded data unit comprising N encoded blocks, with N>K, using an error correction code having a minimum distance d; and transmitting the N blocks of the encoded data unit over a set of N02-21-2013
20100054361ADVANCED-VSB SYSTEM (A-VSB) - A method of resetting a trellis-coded modulation (TCM) encoder to a known state, the TCM encoder including a reset input that resets the TCM encoder to the known state when held at a reset level for a plurality of symbol clock cycles, the method including identifying an event to occur in the future that requires the TCM encoder to be reset to the known state; and holding the reset input of the TCM encoder at the reset level beginning the plurality of clock symbol cycles before a time the event will occur so that the TCM encoder will be reset to the known state immediately before the event occurs.03-04-2010
20100086078METHOD AND APPARATUS FOR EFFICIENT STORAGE OF TRAINING SEQUENCES FOR PEAK TO AVERAGE POWER CONSTRAINED MODULATION FORMATS - The present invention efficiently stores a training sequence in a communications system, where the training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format. In one embodiment, the invention includes selecting a set of one or more original ordered sequences such that the set of ordered sequences has at least one desired property, creating a set of extended sequences, each based on an original ordered sequence by beginning with an element of an original sequence, cyclically appending elements of the original sequence in order to obtain a desired extended sequence length, and modifying each extended sequence using a corresponding modifying sequence, such that a training sequence can be generated from any one of the modified extended sequences by beginning with any one element of any one modified extended sequence and taking each element of the any one sequence in order to obtain the training sequence, the modifying sequence being selected so that the obtained training sequence when modulated by a selected modulation format has the at least one desired property of the corresponding original ordered sequence.04-08-2010
20110194648Wireless Local Area Network (WLAN) Using Universal Frequency Translation Technology Including Multi-Phase Embodiments - Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal generator, a demodulation/modulation facilitation module, and a MAC interface. The WLAN receiver includes at least one universal frequency translation module that frequency down-converts a received EM signal. In embodiments, the UFT based receiver is configured in a multi-phase embodiment to reduce or eliminate re-radiation that is caused by DC offset. The WLAN transmitter includes at least one universal frequency translation module that frequency up-converts a baseband signal in preparation for transmission over the wireless LAN. In embodiments, the UFT based transmitter is configured in a differential and multi-phase embodiment to reduce carrier insertion and spectral growth.08-11-2011
20110194647Method for Transmitting an Information Sequence - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.08-11-2011
20110194646Transmission with M Antennas using Precoding - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.08-11-2011
20110194645LAYERED TRANSMISSION APPARATUS AND METHOD, RECEPTION APPARATUS, AND RECEPTION METHOD - A layered transmission apparatus for transmitting information regarding a plurality of layers includes: a plurality of coding units, which correspond to each of the plurality of layers, configured to code an information bit of a corresponding layer to generate code bits; a plurality of symbol interleaving units, which correspond to each of the plurality of coding units, configured to symbol-interleave the code bit of a corresponding coding unit to generate an interleaved symbol; a modulation unit configured to classify the plurality of layers into a plurality of layer groups, and modulate the interleaved symbol corresponding to each of the layer groups to generate a modulation symbol of each of the layer groups; a gain control unit configured to control the gain of the modulation symbol of each of the layer groups; and an adding unit configured to add the gain-controlled modulation symbols of the plurality of layer groups to generate a transmission symbol.08-11-2011
20110194644Transmission Protection For Wireless Communications - Systems and techniques relating to wireless communications are described. A described technique includes identifying devices to receive spatially steered data frames during a transmission opportunity (TXOP), the data frames being included in a multi-user frame; transmitting, during the TXOP, request to send (RTS) information to the identified devices; receiving clear to send (CTS) responses from the identified devices; determining a bandwidth configuration for the multi-user frame based on the CTS responses; and transmitting, during the TXOP, the multi-user frame to the identified devices in accordance with the bandwidth configuration. The bandwidth configuration can indicate one or more frequency bands that are available during at least a portion of the TXOP.08-11-2011
20110194643LAYERED TRANSMISSION APPARATUS AND METHOD, RECEPTION APPARATUS AND RECEPTION METHOD - A layered transmission apparatus for transmitting information regarding a plurality of layers includes: a plurality of coding units configured to code an information bit of a corresponding layer to generate code bits; a plurality of bit interleaving units configured to bit-interleave a corresponding code bit to generate interleaved symbols; a modulation unit configured to classify the plurality of layers into a plurality of layer groups, and modulate the plurality of the interleaved symbols corresponding to each of the layer groups to generate a modulation symbol of each of the layer groups; a gain control unit configured to control the gain of the modulation symbol of each of the layer groups; and an adding unit configured to add the gain-controlled modulation symbols of the plurality of layer groups to generate a transmission symbol. A reception apparatus includes: a symbol metric estimation unit configured to estimate a symbol metric of a layer transmission signal received from a layered transmission apparatus; a plurality of bit metric calculation units configured to calculate a bit metric corresponding to an interleaved bit generated from the layered transmission apparatus based on the estimated symbol metric; a plurality of deinterleaving units configured to calculate a code bit metric based on the bit metric; a plurality of layer symbol metric calculation units, configured to calculate a symbol metric of the corresponding layer based on the code bit metric of the corresponding layer; and a plurality of decoding units, configured to decode an information bit of the corresponding layer based on the symbol metric of the corresponding layer.08-11-2011
20110194642METHOD AND APPARATUS OF TELECOMMUNICATIONS - Generating codewords and determining an information symbol from a codeword for transmission in a telecommunication system is disclosed. The method and apparatus provided by the embodiments of the invention allow up to a maximum number of codewords to be generated given the code alphabet size. Embodiments of the invention also provide method and apparatus for determining an information symbol from a codeword.08-11-2011
20110194641Method for Encoding a Bit Sequence and Encoding Circuit - A method for encoding a bit sequence is described comprising selecting a first coding block bit number and a first coding scheme; sub-dividing the bit sequence into at least one first bit block and a second bit block, wherein each of the at least one first bit block comprises the first coding block bit number of bits and the second bit block comprises less bits than the first coding block bit number; selecting a second coding scheme for the second bit block different from the first coding scheme; and encoding the at least one first bit block using the first coding scheme and encoding the second bit block using the second coding scheme.08-11-2011
20090122908DIGITAL BROADCASTING TRANSMISSION/RECEPTION DEVICES CAPABLE OF IMPROVING A RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.05-14-2009
20090122907Log-antilog circuit and method for producing an up-converted and amplified transmission signal - According to one exemplary embodiment, a method for producing an up-converted and amplified transmission signal comprises performing a logarithmic transformation of an input transmission signal to form a logarithmically transformed transmission signal, adding the logarithmically transformed transmission signal to a logarithmic local oscillator signal to form a sum signal, and performing an antilogarithmic transformation of the sum signal to produce the up-converted and amplified transmission signal. In one embodiment, a log-antilog circuit for producing an up-converted and an amplified transmission signal comprises a transmission log block configured to receive an input transmission signal and to provide a logarithmically transformed transmission signal as a transmission log block output, and an antilog block coupled to the transmission log block. The antilog block is configured to receive a sum signal of the transmission log block output and a logarithmic local oscillator signal.05-14-2009
20090122910SECTOR-BASED BASE STATION - A sector-based base station includes at least one of a shared transmission RF local oscillator TX_LO, a shared receiving RF local oscillator RX_LO, a shared digital signal processing unit, and a shared transmission feedback unit. A technical solution of sharing an intermediate RF unit circuit in the sector-based base station is adopted, so as to reduce the number of elements used in the circuit without sacrificing the communication capacity of the base station. As such, the reliability index of a single board is improved, and the system reliability is also enhanced. Meanwhile, the material cost and the time required for debugging are both reduced; thus, lowering the cost of the base station.05-14-2009
20090122909RADIO FREQUENCY TRANSMITTER - The invention concerns a radio frequency transmitter (RFT) and a method of amplifying a radio frequency input signal (S05-14-2009
20100119006LOW COMPLEXITY MAXIMUM LIKELIHOOD DETECTION OF CONCATENATED SPACE CODES FOR WIRELESS APPLICATIONS - Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.05-13-2010
20100074366SYSTEM AND METHOD FOR ACKNOWLEDGEMENT PACKET TRANSMITTING AND RECEIVING - A communications method comprising the steps of receiving a data packet; processing the data packet; and transmitting an ack packet approximately at an end of a first defined time interval if the processing of the data packet is completed within the first defined interval, or transmitting the ack packet approximately at an end of a second defined time interval if the processing of the data packet is not completed within the first defined interval and is completed within the second defined interval. Another communication method comprising the steps of transmitting a data packet; scanning a channel for an ack packet approximately at an end of a first defined time interval from the transmission of the data packet; and scanning the channel for the ack packet approximately at an end of a second defined time interval from the transmission of the data packet if the ack packet was not received within the first defined interval.03-25-2010
20130077706TRANSMITTER - The present application relates to a method for reducing the peak-to-mean amplitude ratio of a transmission signal comprising a plurality of coherent replicated signals, and to a transmitted for transmitting such a signal. The transmission signal is separated into the plurality of coherent replicated signals and one of the plurality of replicated signals is delayed with respect to another of the plurality of replicated signals, either in the time domain by introducing a time delay or in the frequency domain by introducing a phase shift. This has the effect of reducing the coherence of the delayed replicated signal with respect to the other replicated signal, reducing the peak power of the signal and therefore reducing the peak-to-mean amplitude ratio of the transmission signal.03-28-2013
20130077708Antenna Control - An energy converter based transmitter, a method, a multi-element antenna array are provided for a radio frequency (RF) transmission. For example, the energy converter based transmitter can include a control circuit, a multiple input single output (MISO) operator, and an antenna. The control circuit is configured to receive input information and generate amplitude control signals and phase control signals. The MISO operator is configured to receive the amplitude control signals and the phase control signals and to generate an RF output signal. Further, the antenna is configured to receive and transmit the RF output signal.03-28-2013
20130077707METHOD AND APPARATUS FOR MULITPLE INPUT MULTIPLE OUTPUT DISTRIBUTED ANTENNA ARRAYS - A method, apparatus and computer program product are provided for reporting low rank feedback information for each transmission point up to a maximum rank per transmission point. In this regard, a method includes determining a transmission rank and a precoding matrix for each of at least two transmission points of a plurality of transmission points. A method also includes determining a joint transmission rank based on at least two of the plurality of transmission points. A method also includes selecting a joint transmission precoding matrix based on the determined precoding matrix for each of the at least two transmission points and the determined joint transmission rank. The method further includes causing channel state information “CSI” to be transmitted to an access point, wherein the CSI describes the selected joint transmission precoding matrix.03-28-2013
20130077705Codebook Performance For Non-Linear Arrays - A method to improve codebook performance for non-linear arrays is described. The method includes determining a unitary matrix for a plurality of transmission antennas arranged in a given array type, the unitary matrix being determined based on a codebook, where the given array type is configured to steer beams in at least one of elevation and azimuth. The method also includes applying the determined unitary matrix to a signal to be transmitted across the plurality of transmission antennas. Apparatus and computer readable media are also described.03-28-2013
20130039441METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING WITH UNEQUAL MODULATION AND CODING SCHEMES - A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.02-14-2013
20130039439MULTICARRIER TRANSMITTING APPARATUS AND MULTICARRIER TRANSMITTING METHOD - A multicarrier transmitting apparatus includes a subcarrier mapping unit, an IFFT unit, and a signal transformation value separation unit. When the subcarrier mapping unit transmits first reference signals and second reference signals continuous in the time axis direction, the subcarrier mapping unit outputs a multicarrier signal in which the first reference signals and the second reference signals are allocated to subcarriers continuous in the frequency axis direction. The IFFT unit performs an inverse Fourier transformation on the multicarrier signal output from the subcarrier mapping unit to output signal transformation values in the time axis direction. The signal transformation value separation unit separates the signal transformation values output from the IFFT unit into signal transformation values associated with subcarriers to which the first reference signals are allocated and signal transformation values associated with the subcarriers to which the second reference signal are allocated.02-14-2013
20130039440APPARATUS AND METHOD FOR SUPPORTING DEVICE TO DEVICE SERVICE - Methods and apparatus are provided for searching for a peripheral device and transmitting device information in a device-to-device service. First information is transmitted using a first tone in a first region of a search duration. A second tone is determined by transposing a subcarrier index and a symbol index of the first tone. The first information is transmitted through the second tone in a second region of the search duration. First information of a peripheral device is received in the first and the second region of the search duration. The second information is transmitted through a resource region corresponding to the first tone in a third region of the search duration. Second information of the peripheral device is received in the third region of the search duration. Device information of the peripheral device is determined by combining the first and second information of the peripheral device.02-14-2013
20130039438SYSTEM AND METHOD FOR A MULTI-BAND TRANSMITTER - In accordance with some embodiments of the present disclosure, a multi-band transmitter comprises a plurality of band paths with each band path configured for a different frequency range. Each band path comprises a modulator configured to modulate a data signal onto a carrier signal associated with the frequency range of the band path to generate a radio frequency (RF) signal associated with the band path and frequency range of the band path. Each band path also comprises a step-down balun that includes an input coil configured to receive the RF signal from the modulator. Each band path further comprises a tuner configured to tune the input coil to the frequency range of the band path. The tuner is also configured to compensate for off-state conduction of switches of the tuner to reduce non-linear tuning effects of the balun associated with the off-state conduction.02-14-2013
20100034314Antenna Configuration and Transmission Mode Signaling In Wireless Communication System - A wireless communication infrastructure entity including a transceiver communicably coupled to a controller configured to generate a handover message having a multi-bit field, the controller configured to set a value of the multi-bit field, the value of the multi-bit field jointly encoded to indicate both a transmission mode to be used after handover and an antenna configuration of a target02-11-2010
20130077710SYSTEM AND METHOD FOR GENERATING A SIGNAL WITH A RANDOM LOW PEAK TO AVERAGE POWER RATIO WAVEFORM FOR AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM - A method for generating a signal with a random low peak to average power ratio waveform for an orthogonal frequency division multiplexing system involves processing a complex vector to generate a processed complex vector and performing an inverse fast Fourier transform on the processed complex vector to generate a signal with a random low peak to average power ratio waveform for an orthogonal frequency division multiplexing system.03-28-2013
20130077711TRANSMISSION/RECEPTION APPARATUS AND METHOD FOR SUPPORTING MIMO TECHNOLOGY IN A FORWARD LINK OF A HIGH RATE PACKET DATA SYSTEM - Methods and apparatus are provided for transmitting and receiving data in a communication system with a plurality of antennas. Data and a first pilot are generated. The first pilot is transmitted at a first position in a frequency domain that corresponds to a position of the generated data in the frequency domain and at a first position in a time domain that is with the generated data, in every transmission time interval of the data. A second pilot is generated. The second pilot is transmitted at predetermined second positions in the time domain and the frequency domain, in a transmission time interval that is predefined by a transmitter and a receiver.03-28-2013
20100046664Multi-frequency data transmission channel power allocation - A communication device has an inner coder and an outer coder and transmits digital data over frequency channels. A method involves obtaining a characteristic of the frequency channels, and selecting performance parameters of the inner and outer coders for each channel based in part on the obtained characteristic of the channel. The performance parameter selecting step includes storing, for each of a plurality of combinations of inner and outer coder performance parameters, a corresponding transmission power requirement, and selecting a combination of inner and outer coder performance parameters by selecting a transmission power requirement, based on a multi-channel efficiency over respective data rates. Data is allocated to be transmitted to each channel.02-25-2010
20100046663METHOD FOR GENERATING 2 OR MORE SEQUENCE SET, AND METHOD FOR GENERATING SEQUENCE FOR THE SAME - A method for generating a set of at least two sequences is provided. This method selects at least one sequence from each of at least two sequences based on different lengths, including first and second types of sequences, and generates a set of at least two sequences using the selected sequences. Another method selects at least one sequence from a first type of sequences and at least one sequence from a second type of sequences generated by modulating the first type of sequences using a different type of sequences, and generates the set of at least two sequences using the selected sequences. To generate sequences based on a length corresponding to available subcarriers excluding a DC subcarrier, another method generates sequences such that the sequences are continuously arranged in a region excluding the DC subcarrier using frequency-domain cyclic shift while none of the sequences is allocated to the DC subcarrier.02-25-2010
20100046662DIGITAL CLIPPING METHOD FOR A TRANSMITTER OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.02-25-2010
20130034184NETWORK INTERFACE APPARATUS, SYSTEM AND METHOD FOR WIRELESS ETHERNET - A network interface apparatus for wireless Ethernet is provided. The network interface apparatus includes: a Network Interface Card (NIC) control unit for converting a gigabit wired Ethernet signal into a Peripheral Component Interconnect express (PCIe) signal; a wireless network processing unit for converting the PCIe signal received from the NIC control unit into an analog signal; and an RF transmitting/receiving unit for converting the analog signal inputted from the wireless network processing unit into an RF signal of a 60 GHz frequency band to transmit the converted RF signal into a wireless terminal device.02-07-2013
20130077709Method and Device of Sending and Receiving Precoding Information - The present invention discloses a method and a device of sending and receiving precoding information. A terminal terminal obtains a wideband precoding matrix indicator PMI. The terminal encodes an MSB of the wideband PMI to obtain encoded information. The MSB of the wideband PMI is encoded separately or jointly with other information and the MSB is a part of the wideband PMI. The terminal sends encoded information to a data sending end.03-28-2013
20100111220METHOD AND APPARATUS USING SOUNDING PPDUs TO PROVIDE RANGE EXTENSION TO IEEE 802.11n SIGNALS - A wireless transmitter includes a stream parser for generating a plurality of spatial streams from a digital signal and a space time block coder (STBC) for mapping each of the spatial streams to a plurality of space-time streams that each include data and a preamble for estimating a channel transfer function. The transmitter also includes a spatial mapper for spatially expanding each of the space-time streams by applying a spatial expansion matrix to data and to first training symbols used in the preamble to probe a channel experienced by the data and by applying an extension matrix to second training symbols used in the preamble to probe at least one additional dimension of the channel to enable use of beamforming to achieve range extension The spatial expansion matrix and the extension matrix form an overall matrix that has at least two orthogonal columns with different norms. The wireless transmitter also includes an analog front end for modulating the spatially expanded space-time streams onto a wireless carrier.05-06-2010
20090154594POWER LINE COMMUNICATION DEVICE WITH DC POWER OUTPUT AND NETWORK SIGNAL TRANSMISSION ABILITIES - A power line communication device having DC power output and network signal transmission abilities has a casing, a power cable connector, a network signal converting circuit and a first connecting interface. The network signal converting circuit is connected to the power cable connector, sends and receives network signals over a power cable connected to the power cable connector and transforms an AC power source to a DC power source. The first connecting interface is connected to the network signal converting circuit for connecting to and exchanging the network signals with an external network device and has a network port and a DC power output port. The DC power output port outputs the DC power source from the network signal converting circuit to the external network device. Therefore, the first connecting interface is capable of outputting the DC power source and transmitting the network signals.06-18-2009
20090154593METHOD AND SYSTEM FOR SUPPORTING A VARIABLE AND ENERGY EFFICIENT DATA RATE USING A DUTY CYCLING TECHNIQUE AND MULTIPLE POWER STATES ON AN ETHERNET LINK - Aspects of a method and system for supporting a variable and energy efficient data rate using a duty cycling technique and multiple power states on an Ethernet link are provided. In this regard, a data rate on a network link may be duty cycled based on characteristics of data communicated over it. The network link may operate at a first data rate for a first portion of the time interval and may operate at a second data rate for a second portion of the time interval. The duration of each portion of the time interval and/or the data rate during each portion of the time interval may be adjusted to control the duty cycling. Power consumed in a device connected to the network link may be controlled based on the duty cycling of the link.06-18-2009
20090154592DATA TRANSMITTING SYSTEM, DATA TRANSMITTING METHOD AND BASE STATION - A base station used in a packet transmission system in which shared user data to be selectively received by a user are transmitted using a shared data channel from one or more base stations to one or more mobile stations is provided. The base station includes means configured to provide user control data associated with transmission of the shared user data; means configured to provide notification data that include notification information used to select the shared user data and group identification information for specifying the notification information; and means configured to generate an associated control channel that is associated with the shared data channel and includes the user control data and the notification data, the associated control channel and the shared data channel being transmitted from the base station to the mobile station. The generated associated control channel is transmitted from the base station to the mobile stations.06-18-2009
20090154591High-speed serial data signal transmitter driver circuitry - Transmitter driver circuitry for outputting a high-speed serial data signal (e.g., in the range of about 10 gigabits per second or higher) includes H-tree driver circuitry having only a main driver stage and a post-tap driver stage. At least one transistor in the H-tree driver circuitry is constructed and connected to provide electrostatic discharge protection. PMOS and NMOS current sources are used for the H-tree driver circuitry to enhance power supply noise rejection.06-18-2009
20100040169CODING METHODS AND SYSTEMS FOR IMPROVED ERROR MARGINS - Each symbol in a sequence of codewords is expressed as a voltage level representative of a one or zero, and each codeword includes both levels. Sense amplifiers at the receiver compare all pairs of symbols in each codeword. Comparisons based upon like symbol values provide mid-range sensed voltages, and comparisons based upon disparate symbols values provide relatively higher or lower sensed voltages. Sampling the high and low voltages produces determinate sample values, whereas sampling the midrange voltage produces indeterminate sample values. Sampling the sensed voltages thus produces a mix of indeterminate and determinate values for each codeword. Codewords are selected such that the number and placement of the determinate sample values identify each codeword, and subsequent codewords are selected so the nodes supporting the high and low sensed voltages sampled to obtain the determinate sample values transitioned to their current voltage from either the intermediate voltage or did not transition.02-18-2010
20100040168TRANSMITTING APPARATUS, RECEIVING APPARATUS AND COMMUNICATION SYSTEM - A transmitting apparatus, receiving apparatus and communication system are disclosed, and great improvement in an S/N ratio, preventing an actual throughput from decreasing, and preventing the number of circuits for synchronizing spread spectrum signals from increasing can be expected at the receiving apparatus side. The transmitting apparatus includes a pulse generating circuit, pulse repetition cycle determining circuit, peak power determining circuit, and modulator. The pulse generating circuit generates pulse strings, pulse repetition cycle determining circuit determines, based on a clock signal, a pulse repetition cycle of the pulse string generated by the pulse generating circuit. The peak power determining circuit determines a pulse peak power of the pulse string. The modulator modulates the pulse string with transmission data, and then generates a transmission signal.02-18-2010
20100027711DIGITAL LINEAR TRANSMITTER ARCHITECTURE - A digital linear transmitter for digital to analog conversion of a radio frequency signal. The transmitter includes a delta sigma (ΔΣ) digital to analog converter (DAC) and a weighted signal digital to analog converter in the transmit path of a wireless device to reduce reliance on relatively large analog components. The ΔΣ DAC converts the lowest significant bits of the oversampled signal while the weighted signal digital to analog converter converts the highest significant bits of the oversampled signal. The transmitter core includes components for providing an oversampled modulated digital signal which is then subjected to first order filtering of the oversampled signal prior to generating a corresponding analog signal. The apparatus and method reduces analog components and increases digital components in transmitter core architecture of wireless RF devices.02-04-2010
20120183097RADIO POWER CONVERTER AND RADIO COMMUNICATION APPARATUS - The present invention provides a radio power converter and a radio communication apparatus in which an environmental electromagnetic wave is efficiently converted into an operation power of a semiconductor integrated circuit by using a coil antenna configured within the semiconductor integrated circuit. The radio communication apparatus converts the received environmental electromagnetic wave into a direct-current voltage and charges a decoupling capacitor with an electric power so as to increase the direct-current voltage. A resonance frequencies of an antenna are changed depending upon a value of the increased direct-current voltages. The antenna sequentially receives environmental electromagnetic waves having different resonance frequencies for thereby increasing the direct-current voltage to a desired direct-current voltage.07-19-2012
20120183096WIDEBAND TRANSCEIVER DEVICE FOR TRANSMITTING AND RECEIVING SIGNALS FROM A CHANNEL SELECTED IN DYNAMICALLY SPREAD BANDWIDTH - The proposed process makes it possible to noticeably and dynamically increase the operational frequency band of a wideband emission/reception device without performance degradation, this thanks to the implementation of a particular architecture and a judicious distribution of the technical constraints over the analogue and digital sub-assemblies of a user terminal.07-19-2012
20120183095APPARATUS AND METHOD FOR SIGNALLING CARRIER COMBINATION CAPABILITIES FOR A MULTI-CARRIER MULTI-BAND WIRELESS COMMUNICATION SYSTEM - An apparatus, method, and computer program product for generating and correspondingly decoding an information element adapted to encode a set of supported carrier combinations for a user equipment in a dual-band multi-carrier wireless communication system. Here, the information element corresponds to a geometric representation of the set of supported carrier combinations, such as a grid that has a first axis corresponding to a first band, and a second axis corresponding to a second band. This way, the grid includes a plurality of cells, each cell representing a carrier combination in the first band and the second band.07-19-2012
20130208821SYSTEMS, METHODS, AND DEVICES TO PERFORM INTERLEAVING - An apparatus includes an interleaver configured to interleave encoded data and to output a series of interleaved bits to be transmitted via a 1 MHz orthogonal frequency-division multiplexing (OFDM) transmission. The apparatus also includes a modulator configured to modulate the interleaved bits and a transform module configured to transform the modulated bits. A transmit module of the apparatus is configured to transmit the transformed bits included in one or more spatial streams of the 1 MHz OFDM transmission.08-15-2013
20100329383APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND A METHOD OF TRANSMITTING AND RECEIVING A SIGNAL - A method of transmitting/receiving a signal and an apparatus for transmitting/receiving a signal are disclosed. The method of receiving a signal includes receiving signal frames temporally shifted via a plurality of radio frequency (RF) channels, demodulating one of the signal frames using first pilot signals and second pilot signals included in the signal frames and compensating for the channel of the demodulated signal frame and decoding service contents from the signal frame of which the channel is compensated for.12-30-2010
20100142641METHOD FOR PROCESSING A DIGITAL SIGNAL IN A DIGITAL DELTA-SIGMA MODULATOR, AND DIGITAL DELTA-SIGMA MODULATOR THEREFOR - The digital delta-sigma modulator includes a signal input for receiving digital samples of N bits, and a digital filter connected to the signal input. The digital filter performs addition/subtraction and integration operations according to a redundant arithmetic coding for delivering digital filtered samples. A quantizer performs a nonexact quantization operation so as to deliver digital output samples of n bits, with n being less than N. The input of the quantizer is connected within the digital filter.06-10-2010
20130089165METHOD OF DETERMINING PRECODING MATRIX AND CORRESPONDING COMMUNICATION METHODS AND DEVICES - In order to improve the performance of the precoding scheme for closely-spaced cross-polarized CLA antennas, the invention proposes a new precoding codebook and precoding matrix. The invention also proposes a method for determining precoding matrix based on the new precoding codebook, and corresponding method and device for communicating by using this precoding matrix. The precoding codebook and matrix proposed in the invention has better performance.04-11-2013
20130089161Low-Power Modulation in an Amplifier - A switching audio amplifier may include a modulation enhancement feature, in which the pulse-width modulated (PWM) signals driving the output stage are reduced or increased by identical step sizes to create an auxiliary PWM scheme representative of an idle (low-power) state of the input signal. The PWM signals, provided to a full-bridge power stage circuit for example, may be thereby reduced to another state to reduce power dissipation in a switch-mode power supply. By incrementally adjusting the PWM duty-cycle identically in all PWM signals to a value less than (or up to) 50%, the amount of current dissipated in the output load may be effectively controlled. The PWM pulses may be adjusted up or down, while checking for saturation corresponding to both minimum and maximum pulse-widths. A dampener circuit may be used to set the time between incremental adjustments, to further reduce audible pops and clicks.04-11-2013
20130089164PRE-CODING METHOD AND TRANSMITTER - Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.04-11-2013
20130089160SERIAL PORT CONNECTION CIRCUIT AND SERVER - A server includes a baseboard management controller (BMC), an input/output (I/O) chip, a serial port, and a serial port connection circuit. The serial port connection circuit is connected to the BMC, the I/O chip, and the serial port, and selectively connects either the BMC or the I/O chip to the serial port.04-11-2013
20130089163DEVICE AND METHOD FOR GENERATING PILOT SEQUENCE - A device for generating a pilot sequence is provided. The device includes: a mapping information determining unit configured to determine periodic mapping information of the pilot sequence on subcarriers; and a pilot sequence generating unit configured to generate the pilot sequence by calculating phase information of the pilot sequence to be generated based on the periodic mapping information. A method and a device for estimating channel information are also provided.04-11-2013
20130089162LOW COMPLEXITY MAXIMUM LIKELIHOOD DETECTION OF CONCATENATED SPACE CODES FOR WIRELESS APPLICATIONS - Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.04-11-2013
20100135434RF TRANSMITTER WITH STABLE ON-CHIP PLL - A phase locked loop (PLL) a phase detector, a charge pump, a loop filter, a controlled oscillator, and a feedback divider. The phase detector is coupled to produce a difference signal based on a difference between phase of a reference oscillation and phase of a feedback oscillation. The charge pump is coupled to convert the difference signal into an up-signal or a down signal. The loop filter coupled to filter the up signal or the down signal to produce a control signal. The controlled oscillator is coupled to generate an output oscillation based on the control signal. The feedback divider is coupled to generate the feedback oscillation from the output oscillation based on a divider value. The loop filter includes a first resistor-capacitor circuit and a second resistor-capacitor circuit. The first resistor-capacitor circuit is calibrated using a first calibration technique and the second resistor-capacitor circuit is calibrated using a second calibration technique.06-03-2010
20090304108METHOD AND APPARATUS FOR IMPROVING PAPR IN OFDM OR ORDMA COMMUNICATION SYSTEM - A method and apparatus for diminishing a peak power to average power ratio (PAPR) in an OFDM/OFDMA communication system are disclosed, by which complexity in an OFDM/OFDMA communication system can be reduced. In an OFDM or OFDMA communication system, the present invention includes a circular shift module circularly shifting to output at least one or more data sequences according to circular shift information to be applied to each of the at least one or more data sequences converted to a time domain from a frequency domain, a combining module combining the at least one or more data sequences outputted from the circular shift module, and a PAPR calculating module calculating the PAPR of an entire data sequence combined by the combining module.12-10-2009
20120219087APPARATUS AND METHOD FOR IMPROVING HIGH-POWER SIGNAL RECEIVING PERFORMANCE USING LOW-POWER SIGNALS - Provided are an apparatus and a method for enhancing a reception performance of a high power signal using a low power signal. Main service data and supplementary information data that may supplement the main service data may be hierarchically modulated and be transmitted. The main service data may be modulated as a high power signal to be transmitted, and the supplementary information data may be modulated as a low power signal to be transmitted.08-30-2012
20090092202METHOD AND APPARATUS FOR ADJUSTING UPLINK DATA RATE IN A MOBILE COMMUNICATION SYSTEM - A method and UE apparatus are provided for adjusting an uplink data rate by a User Equipment (UE) in a mobile communication system. The method includes determining if a current state of a buffer is an empty state or a non-empty state; when the current buffer state is the non-empty state, comparing a ratio of a total of transmission data currently stored in the buffer to a total of Transport Formats (TFs) allocated during a predetermined number n of subframes with a predetermined threshold; setting indication information indicating satisfaction/non-satisfaction (‘happy bit(s)’) of an uplink data rate according to the comparison result; and transmitting the set indication information to a Node B. The UE apparatus comprises a multiplexing/demultiplexing device, a HARQ processor, a controller to set information indicating satisfaction/non-satisfaction in accordance with pre-set rules, an exemplary set of which is also provided.04-09-2009
20130070868Low-Loss, Broad Band, LC I/Q Phase Shifter - Some embodiments relate to a phase shifter that includes an I/Q phase shifter and at least one LC balun. Compared to conventional phase shifters, phase shifter has primarily only LC components, thereby limiting losses relative to conventional solutions. In one embodiment, for example, a phase shifter shows a large bandwidth at 77 GHz center frequency (e.g., 1 dB amplitude error bandwidth is approximately 40 GHz; 1° phase error bandwidth is about 16.5 GHz). The inductors included in phase shifter, in contrast to the quarter wave transmission lines used in conventional phase shifters, reduces chip area compared with conventional solutions. In some embodiments, an emitter follower helps to provide a relatively constant output that is largely independent of temperature, input power, VCC, manufacturing variation, and so on.03-21-2013
20130070869CHANNEL IMPULSE RESPONSE ESTIMATION FOR WIRELESS RECEIVER - Estimating a channel impulse response (CIR) for a wireless transmission, for example a multimedia broadcast multicast services single frequency network (MBSFN) transmission, may be performed by a receiver of an wireless subframe, without requiring operational memory in excess of what is needed for CIR estimation of unicast signaling, while providing enhanced delay spread coverage. The wireless subframe may be a MBSFN subframe. The receiver may form an aggregate vector of pilot tones extracted from an OFDM reference symbol of an wireless subframe. The receiver may subsample the aggregate vector to obtain a plurality of sub-vectors each comprising a distinct subsampling phase. The receiver may process the plurality of sub-vectors using an inverse fast Fourier transform to obtain time domain representations of each of the sub-vectors. The receiver may combine the time domain representations in various ways to obtain a CIR estimate for the wireless subframe.03-21-2013
20130058430Trellis modulation protocols for a VDSL system - A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are grouped, and Trellis encoding is performed only of the members of a group. The computational cost of coding and decoding the data is reduced (compared to treating all the tones of a given direction equivalently), and the invention makes it possible to significantly reduce the computational and memory requirements of the encoder and decoder. Furthermore, Trellis decoding errors are not propagated between the groups.03-07-2013
20130058431Methods, apparatus, and systems for coding with constrained interleaving - Serially-concatenated codes are formed in accordance with the present invention using a constrained interleaver. The constrained interleaver cause the minimum distance of the serial concatenated code to increase above the minimum distance of the inner code alone by adding a constraint that forces some or all of the distance of the outer code onto the serially-concatenated code. This allows the serially-concatenated code to be jointly optimized in terms of both minimum distance and error coefficient to provide significant performance advantages. Constrained interleaving can be summarized in that it: 1) uses an outer code that is a block code or a non-recursive convolutional code, and as such, there are multiple codewords present in the constrained interleaver, 2) selects a desired MHD, 3) selects an interleaver size and a set of predefined interleaver constraints to prevent undesired (low-distance) error events so as to achieve the desired MHD, and 4) performs uniform interleaving among the allowable (non-constrained) positions, to thereby maximize or otherwise improve the interleaver gain subject to the constraints imposed to maintain the desired MHD.03-07-2013
20130058429TRANSMITTER EQUALIZATION METHOD AND CIRCUIT USING UNIT-SIZE AND FRACTIONAL-SIZE SUBDRIVERS IN OUTPUT DRIVER FOR HIGH-SPEED SERIAL INTERFACE - A method is provided for controlling a data transmission device that includes at least one fractional-sized subdriver. The method includes enabling at least one subdriver and driving a differential signal pair output. Also provided is a device with an output driver having a plurality of subdrivers where at least one subdriver is fractional-sized. The device also includes a de-emphasis portion configured to enable and disable the subdrivers. The device is configured to drive an output data signal. Also provided is a computer readable storage device encoded with data for adapting a manufacturing facility to create an apparatus such as the device. Also provided is an apparatus that includes an output driver with at least one fractional-sized subdriver and a de-emphasis portion configured to enable and disable the subdrivers of the output driver. The output driver is configured to drive a differential output data signal.03-07-2013
20110013723Receiving Apparatus, Transmitting Apparatus, Reception Method, And Transmission Method - A reception unit receives data from communication apparatuses. A transmission unit transmits data to the communication apparatuses. A control unit determines, in an adaptive way, which modulation and coding schemes to use to transmit and receive data. At a first stage, a modulation and coding scheme with a low transmission rate or a modulation and coding scheme that minimizes power requirements is selected from among a plurality of candidates therefor. At a second stage, the modulation and coding scheme of at least one of the communication apparatuses is changed to another scheme having a higher transmission rate, when it is impossible to allocate sufficient resources for the modulation and coding schemes selected at the first stage.01-20-2011
20110013722Method for Generating Training Sequences and Transmitter Using the Same - A method for generating training sequences in a transmitter having a plurality of transmitting antennas, includes dividing each of a plurality of symbols into a plurality of sub-symbols with a quantity equal to a quantity of the plurality of transmitting antennas, sequentially transforming a plurality of sub-symbols corresponding to same positions in each of the plurality of symbols, to generate a plurality of training data, and generating a plurality of training sequences of independent frequencies according to the plurality of training data, for forming parts of packets emitted by the plurality of transmitting antennas.01-20-2011
20110013721METHOD OF GENERATING PREAMBLE SEQUENCE - A method of generating preamble sequence is disclosed. A channel used by a wireless device may be divided into four sub-channels, and the method includes forming a preamble sequence of a first sub-channel, making three replicas of the preamble sequence of the first sub-channel, each replica with a phase rotation of a first angle, a second angle, and a third angle respectively, for forming each preamble sequence of a second sub-channel, a third sub-channel, and a fourth sub-channel, and arranging the preamble sequences of the first, the second, the third, and the fourth sub-channels to form a preamble sequence of the channel.01-20-2011
20110013719WEIGHTING FACTOR REPORTING METHOD IN A MIMO MOBILE COMMUNICATIONS SYSTEM, AND BASE STATION AND USER APPARATUS THAT ARE SUITABLE FOR USE IN THE METHOD - A user apparatus in a multi input multi output (MIMO) mobile communications system using pre-encoding is disclosed. The user apparatus includes a PMI generator which generates, in accordance with a radio propagation condition, a pre-encoding matrix indicator (PMI) which indicates a pre-encoding matrix to be used by a base station; a delay circuit which takes, as an input, the PMI and which outputs the PMI after a predetermined delay period has elapsed; an accumulating unit which takes, as an input, the PMI from the delay circuit and stores the input PMI; and a channel estimator which, on a signal from the base station, performs channel estimation using the PMI stored in the accumulating unit.01-20-2011
20110013718APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND METHOD OF TRANSMITTING AND RECEIVING A SIGNAL - The present invention relates to method of transmitting and receiving signal and apparatus thereof. In one aspect of the present invention, the method of receiving a signal, includes receiving a signal transmitted from a specific radio frequency (RF) channel, demodulating the received signal, parsing a signal frame of the demodulated signal and obtaining a physical layer pipe (PLP) located in a layer-1 information region of a second pilot signal, from the signal frame.01-20-2011
20110013717METHODS TO INDEX THE PREAMBLES IN THE BANDWIDTH REQUEST CHANNEL - For use in a wireless communication network, a mobile station configured to determine a preamble sequence from a set of indexed preamble sequences by generating an index of the preamble sequence from a B-bit message is provided. The mobile station is configured to group the B bits of the message into n groups, each group having a substantially equal number of bits. The mobile station is also configured to generate a parity bit from each of the n groups. The mobile station is further configured to determine the index of the preamble sequence based on the n parity bits. The mobile station is still further configured to transmit the preamble sequence corresponding to the index of the preamble sequence. A base station configured to recover the B-bit message using the received signal from the mobile station is also provided.01-20-2011
20110013716Time-Frequency Space Constructions of Families of Signals - A computer-implemented method and system for generating large families of sequences with desirable properties for many applications, including communications and radar applications, applies constraints to a sequence in the Zak space, modulates the constrained sequence in the Zak space, and determines permutations of the modulated sequence in the Zak space. The constraints are associated with predetermined properties, including predetermined autocorrelation and cross-correlation properties. Other embodiments of the computer-implemented method and system transform an input sequence into a transformed sequence using the finite Zak transform and determine at least one other different sequence based on the transformed sequence. The at least one other different sequence can be determined by collecting a plurality of sequences that are finitely supported on an algebraic line in the Zak space and modulating and/or determining permutations of some or all of the sequences.01-20-2011
20120189078DUAL POLARIZATION ANTENNA AND METHOD FOR TRANSMITTING AND RECEIVING SIGNAL USING THE SAME - The present invention relates to a general active array antenna apparatus capable of environmentally and temporally controlling radio frequency (RF) polarization resource necessary for wireless communication in order to improve communication quality and increase communication capacity. The antenna according to the present invention has a form of an active array antenna element, wherein each active array antenna element has a structure in which it may generate orthogonal dual polarizations and includes two input terminals and output terminals. An end orthogonal dual polarization antenna is connected to a polarization control apparatus that may process analog or digital signals, and the polarization control apparatus is controlled by or communicate with an antenna main controlling apparatus performing a polarization control algorithm. Ultimately, an object of this antenna apparatus is to improve communication quality and increase communication capacity.07-26-2012
20100128813Multi-channel Signaling with Equalization - A data transmission circuit comprises a plurality of data preparation circuits and a combiner. Each data preparation circuit receives a respective data stream and generates a respective sub-channel signal. Each respective data stream has a respective symbol rate and a respective Nyquist bandwidth. The combiner combines the respective sub-channel signals to generate a data transmission signal having an associated bandwidth. The bandwidth associated with the data transmission signal is greater than or equal to the sum of the Nyquist bandwidths for the respective data streams. Each data preparation circuit comprises a programmable linear equalizer that equalizes the respective sub-channel signal across the bandwidth of the data transmission signal.05-27-2010
20090268845RADIO TRANSMITTER INCORPORATING DIGITAL MODULATOR AND CIRCUITRY TO ACCOMMODATE BASEBAND PROCESSOR WITH ANALOG INTERFACE - A circuit provides a digital signal at optimal times to a digital processor of a transmitter. The circuit includes a complex analog-to-digital converter (ADC), a demodulator and a timing recovery circuit. The complex ADC is connected to receive an analog complex modulated baseband signal and to convert the analog complex modulated baseband signal to a digital complex modulated baseband signal. The demodulator operates to demodulate the digital signal to produce a demodulated digital signal for input to the digital processor. The timing recovery circuit receives a control signal and activates the digital processor based on a fixed timing relationship between receipt of the control signal at the timing recovery circuit and receipt of the analog complex modulated baseband signal at the complex ADC.10-29-2009
20090268843SYSTEMS AND METHODS FOR PROVIDING UNEQUAL MESSAGE PROTECTION - Input data may be coded in accordance with a coding method that allows for either coded data or messages to be transmitted with pre-determined, but unequal reliability over a communication channel. The coding method may allow the messages to be transmitted with higher reliability than the coded data. Messages may be transmitted when they are available. Otherwise, the coded data may be transmitted.10-29-2009
20100091903SC-QOSTFBC CODES FOR MIMO TRANSMITTERS - A SC-QOSTFBC (Single Carrier-Quasi Orthogonal Space Time Frequency Block Code) for 4 transmit antennas in the domain of wireless communication, and coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. These codes are based on sending on a first antenna a constellation corresponding to what would be sent in a mono antenna scheme, and sending equivalent constellations on the other antennas. The codes are designed to keep a low-PAPR property at each transmit antenna when associated with DFT spread OFDM.04-15-2010
20100091902METHOD OF TRANSMITING DATA TO MITIGATE INTRERENCE - A method of transmitting data using hybrid automatic repeat request (HARQ) is provided. The method includes transmitting an initial data, receiving a retransmission request for the initial data, generating a retransmission data by shifting the phase of the initial data on signal constellation and transmitting the retransmission data. Inter-cell interference or intra-cell interference can be mitigated.04-15-2010
20130064322FREQUENCY-CONTROL CIRCUITS AND SIGNAL GENERATION DEVICES USING THE SAME - A signal generation device is provided to generate an output signal with constant frequency. The signal generation device includes a frequency-control circuit and a voltage-controlled delay line. The frequency-control circuit is arranged to charge/discharge a voltage-control node according to a comparison result signal. The voltage-controlled delay line is arranged to generate a control signal according to the comparison result signal and a control voltage of the voltage-control node to control the output signal. A frequency of the control signal is modulated by the voltage-controlled delay line according to the control voltage of the voltage-control node. The comparison result signal is generated according to a difference between a reference voltage and a voltage level of the output signal.03-14-2013
20130064321METHODS FOR ASYNCHRONOUS SERIAL DATA TRANSMISSION USING A SYNCHRONOUS SERIAL INTERFACE - The invention relates to a method for the unidirectional, asynchronous serial data transfer with an asynchronous data format with F frame bits between a transmitting interface of a data transmitting device and between a data receiving device with a serial receiving interface comprising an asynchronous serial data input. It is provided that the transmitting interface is constructed as a synchronous serial interface with at least one data line, whereby the data line is connected to the asynchronous serial data input of the receiving interface, a data word with D data bits to be transmitted by the data transmitting device in order to generate a format with F frame bits corresponding to the asynchronous data format is supplemented. The data word supplemented with the frame bits is stored in a transmitting register for transmission to the data receiving device.03-14-2013
20130064320Lattice coded mimo transmission method and apparatus - A method and corresponding apparatus for signal space information encoding through a multi-input-multi-output communication system of given dimension, with no or little degradation in link performance (relative to non- multi-input-multi-output systems), said method and corresponding apparatus comprising, splitting said information into at least as many separate parts as said dimension of said multi-input-multi-output communication system, separately signal space encoding each of these said parts, and transmitting each of said separate encoding results on a selected dimension of said multi-input-multi-output communication system along sequential usages of the transmission channel.03-14-2013
20130163690METHOD FOR TRANSMITTING SIGNAL OF ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING TYPE, AND APPARATUS APPLIED TO THE SAME - The method for transmitting a signal of an orthogonal frequency division multiplexing type according to an exemplary embodiment of the present invention has a configuration allowing a radio unit (RU) to perform a component adding a compression component and a decompression component before/after a serial interface interlocking between a digital unit (DU) and the radio unit (RU) and a component inserting a cyclic prefix (CP) into a signal so as to secure orthogonality of an orthogonal frequency division multiplexing (OFDM) signal, in a structure in which a base station is physically divided into the DU and the RU.06-27-2013
20130163692SYSTEM AND METHOD FOR SELECTIVELY PERFORMING SINGLE-ENDED AND DIFFERENTIAL SIGNALING - In a communication system, data is selectively transmitted using single-ended or differential signaling. The data is transmitted in relation to a plurality of clock signals having different relative phases. When the data is transmitted using single-ended signaling, data on adjacent signal lines undergo logic transitions at different times in relation to the plurality of clock signals.06-27-2013
20090238304WIRELESS COMMUNICATIONS APPARATUS - Precoding information prior to MIMO transmission is described, comprising determining a suitable preceding perturbation. The perturbation is determined by assembling a list of candidate perturbations in reduced lattice space, transforming these back into information lattice space and determining which candidate precoder perturbation is most suitable given a performance criterion.09-24-2009
20090238303METHOD AND SYSTEM FOR CODEBOOK-BASED CLOSED-LOOP MIMO USING COMMON PILOTS AND ANALOG FEEDBACK - A method and system that enables the usage of sounding-based feedback or analog feedback in a MIMO communication system with non-beamformed or broadcast pilot symbols is disclosed. The mobile station may employ a feedback channel to send a sounding waveform to a base station, a feedforward channel to receive from the base station codebook weights derived from the send sounding waveform, a receiver to receive communication from the base station, and a processor to detect beamformed data from the received communication and received codebook weights from the base station. The base station processes the sounding waveform to determine codebook weights on groups of subcarriers. Additionally, the base station transmits the beamformed payload and broadcast pilots to the mobile station.09-24-2009
20090238302Method and apparatus for signal coding - A method and apparatus is disclosed for use in a communication system for encoding data to achieve more efficient coding rates and high data transmit rate, or a lower bit error rate. An encoder may receive a portion of the data to be encoded and process the portion of the data to create encoded data. The encoded data and the portion of the data not sent to the encoder are presented to a transform module configured to perform matrix multiplication on the inputs with a transform matrix. The resulting transformed data is mapped, using a mapper, either via an algorithmic approach or a manual mapping approach to generating a constellation mapped output. 2-dimensional encoding may occur.09-24-2009
20130188747APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN COMMUNICATION SYSTEM - An apparatus for transmitting data in a communication system includes: a receiving unit configured to receive feedback information for each of a plurality of stations (STAB) in response to a control frame; an adjusting unit configured to adjust links of the STAB at frequency channels based on the feedback information, and set optimal links for the respective STAB; and a transmitting unit configured to transmit data to the STAB through the optimal links, wherein the feedback information comprises one or more of optimal stream number information, optimal modulation and coding scheme (MCS) information, optimal bandwidth information, average signal-to-noise ratio (SNR) information, space-time information, optimal space-time block coding (STBC) information, group ID information, coding type information, and FB Tx type information.07-25-2013
20090232251APPARATUS WITH TUNABLE FILTER AND RELATED ADJUSTING METHOD - The present invention discloses a method for adjusting a tunable compensation filter within a communication device. The method includes the following steps: generating at least a detecting signal according to at least a pole of the tunable compensation filter; generating a transmitted signal according to the detecting signal; receiving the transmitted signal via a loop switch; generating a filtered signal by filtering the transmitted signal; generating a received signal by compensating the filtered signal; generating at least an indicating signal by comparing the detecting signal with the received signal; and determining whether to adjust at least a coefficient of the tunable compensation filter or not according to the indicating signal.09-17-2009
20090232249PEAK SUPPRESSING APPARATUS, WIRELESS TRANSMITTING APPARATUS, AND WINDOW FUNCTION GENERATING APPARATUS - A peak suppressing apparatus for suppressing peak components of a signal using a window function includes a detecting unit that detects the peak components which are more than a given threshold value, a window width setting unit that sets a window width of the window function, and a window function generating unit that generates the window function using quadratic functions by calculation on the basis of the peak levels of the peak components and the window width.09-17-2009
20090154595I-Q MISMATCH CALIBRATION AND METHOD - Techniques are provided for reducing mismatch between the in-phase (I) and quadrature (Q) channels of a communications transmitter or receiver. In an exemplary embodiment, separate voltages are applied to bias the gates or bulks of the transistors in a mixer of the I channel versus a mixer of the Q channel. In another exemplary embodiment, separate voltages are applied to bias the common-mode reference voltage of a transimpedance amplifier associated with each channel. Techniques are further provided for deriving bias voltages to minimize a measured residual sideband in a received or transmitted signal, or to optimize other parameters of the received or transmitted signal. Techniques for generating separate bias voltages using a bidirectional and unidirectional current digital-to-analog converter (DAC) are also disclosed.06-18-2009
20090046805UPLINK CONTROL CHANNEL FORMAT - Systems and methodologies are described that facilitate encoding feedback or control information into a compact payload. In particular, a rank indicator, a precoding matrix indicator and channel quality indicators are packaged into a control channel payload that fits into a single sub-frame. The payload format is determined based at least in part on an antenna configuration or channel quality indicator granularity. In addition, hybrid automatic repeat requests can be included in the payload.02-19-2009
20120230448METHOD AND APPARATUS FOR TRANSMITTING DATA IN VERY HIGH THROUGHPUT WIRELESS LOCAL AREA NETWORK SYSTEM - A method of transmitting data in a wireless local area network is provided. The method includes the steps of: generating a data unit including a MAC (Medium Access Control) header and MSDU (MAC Service Data Unit), generating an encoded data unit by encoding the data unit, generating one or more spatial blocks by dividing the encoded data unit, dividing each of the one or more spatial block into a first block and a second block, generating a first interleaved block and a second interleaved block by interleaving the first block and the second block respectively, generating a first mapped sequence by mapping the first interleaved block into signal constellation, generating a second mapped sequence by mapping the second interleaved block into signal constellation, generating the transmission signal by performing IDFT (Inverse Discrete Fourier Transform) to the first mapped sequence and the second mapped sequence; and transmitting the transmission signal.09-13-2012
20090010357TERMINAL APPARATUS, BASE STATION AND COMMUNICATION METHOD - There is provided with a terminal apparatus including: a block generation unit configured to generate a block that includes a plurality of symbols being temporally consecutive and one or more repetition symbols added to a head end of the symbols, the repetition symbols having same waveform as a partial waveform including a rear end of the symbols and S01-08-2009
20120114071METHOD OF RESENDING DIGITAL SIGNALS - The invention relates to a method of resending at least one digital signal, comprising a step of reception by cable of the signal comprising signaling information, a step of resending of this signal at a resend frequency by an antenna, and also comprising a step of selecting the resend frequency as a function of the signaling information; a step of transposing the signal into the selected frequency of the resend signal and a step of monitoring and adjusting the frequency of the resend signal as a function of the selected frequency of the resend signal.05-10-2012
20120114070DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD IN DIGITAL BROADCASTING SYSTEM - A method of transmitting a broadcast signal includes performing Reed-Solomon (RS) frame encoding and Cyclic Redundancy Check (CRC) encoding on first mobile service data to form a primary RS frame and on second mobile service data to form a secondary RS frame; encoding on at least the first mobile service data or the second mobile service data, in serial concatenated convolution code (SCCC) block units; encoding signaling information including transmission parameters, the transmission parameters including SCCC encoding information and RS frame encoding information; formatting a data group including the encoded first mobile service data and second mobile service data, wherein the first mobile service data are included in a first region within the data group and the second mobile service data are included in a second region within the data group, the second region being different from the first region; and transmitting the broadcast signal including the formatted data group.05-10-2012
20120114068FLIP-FLOP INCLUDING KEEPER CIRCUIT - A flip-flop includes a transmission circuit configured to transmit data to a transmission line in response to a clock signal and a complementary clock signal. The flip-flop further includes a keeper circuit configured to latch data of the transmission line in response to the clock signal and the complementary clock signal to maintain the data of the transmission line constant.05-10-2012
20120114067EMPHASIS SIGNAL GENERATION CIRCUIT AND SIGNAL SYNTHESIS CIRCUIT - An emphasis signal generation circuit includes a phase shifter configured to delay a signal, an adder/subtractor configured to perform addition/subtraction of a first signal and a second signal at a predetermined ratio, the ratio being freely variable, and an amplitude adjuster configured to perform adjustment of an amplitude of a signal with an adjustment amount of the amplitude being freely variable. An input signal to the emphasis signal generation circuit is input to the adder/subtractor as the first signal. Meanwhile, an emphasis component signal obtained by delaying the input signal by the phase shifter and adjusting the amplitude of the delayed input signal is input to the adder/subtractor as the second signal.05-10-2012
20120114065CUBIC-METRIC BASED FREQUENCY SELECTIVE PRECODING FOR UPLINK IN MIMO COMMUNICATION SYSTEM - A method of wireless communication is disclosed which includes acquiring a first set of precoding matrices for a set of frequency bands and generating a second set of precoding matrices for the set of frequency bands based on the first set of precoding matrices. The second set of precoding matrices enables a transmission that satisfies a cubic metric criteria in multiple-in multiple-out communication mode in the uplink. In some designs, generating the second set of precoding matrices can be based on restricting the first set of precoding matrices for a set of frequency bands and transmission rank, rotating the first set of precoding matrices based for a predetermined transmission rank, or a combination thereof.05-10-2012
20120114064Reference Signaling Scheme Using Compressed Feedforward Codebooks for MU-MIMO Systems - A multi-user MIMO downlink beamforming system with limited feed forward (05-10-2012
20110019767Phase-Locked Loop Modulation - A phase-locked loop having: an oscillator for forming an oscillating output signal; a frequency divider connected to receive the output of the oscillator and frequency divide it by a value dependent on a division control signal; and a phase comparator for comparing the phase of the divided signal and a reference signal to generate a control signal, the operation of the oscillator being dependent on the control signal; the output data to form a divided signal a division ratio controller configured to, when clocked by an input signal, generate a series of output data for forming the division control signal; the phase-locked loop having: a first mode of operation in which the frequency divider is operable to frequency divide the output of the oscillator by a value dependent on the output of the division ratio controller; and a second mode of operation in which the frequency divider is not operable to frequency divide the output of the oscillator by a value dependent on the output of the division ratio controller, and the division ratio controller is clocked by a signal that is independent of the output of the oscillator.01-27-2011
20110019764Method of Data Transmission in Multiple Antenna System - A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3.01-27-2011
20080298498TRANSMITTING APPARATUS, RECEIVING APPARATUS, RADIO COMMUNICATION SYSTEM, TRANSMITTING METHOD, RECEIVING METHOD, COMMUNICATION METHOD AND PROGRAM - A communication method for transmitting and receiving a coded signal is provided. In a transmitting end, the method holds (determines) control information for specifying an insertion position and an insertion amount to insert a redundant signal known to the receiving apparatus into an information data sequence, generates a coded signal sequence by encoding an information data sequence, generates a transmission signal by inserting the redundant signal into the coded signal sequence based on the held control information, and transmits the generated transmission signal. In a receiving end, the method receives the transmission signal as a received signal, holds likelihood information for a redundant signal contained in the received signal, calculates a likelihood from the received signal, substitutes the likelihood information for a likelihood corresponding to the redundant signal included in the calculated likelihood and demodulates the signal.12-04-2008
20120236963AMPLIFYING UNIT, POWER AMPLIFIER AND TRANSMITTER - A power amplifier, which includes n+1 amplifying units coupled in parallel, where n is an integer greater than or equal to 0, third input ends VR(i) of the n+1 amplifying units are coupled to a power input V09-20-2012
20120236962RADIO COMMUNICATION APPARATUS CAPABLE OF SWITCHING MODULATION SCHEMES - A transmitting apparatus, includes a signal generator that generates a modulation signal by modulating transmission data using one of a plurality of modulation schemes, a first modulation scheme having a higher m-ary modulation value than other modulation schemes and a pilot signal generator generates a pilot signal. An orthogonal frequency division multiplexing (OFDM) signal generator generates an OFDM signal by selecting the modulation signal and the pilot signal according to the frame timing signal. The OFDM signal is converted to a radio signal, is amplified and is transmitted to an antenna. The pilot signal is inserted in the OFDM signal per a predetermined OFDM symbol and per a predetermined subcarrier and has a lower amplitude than a maximum amplitude of the first modulation scheme in an in-phase-quadrature (IQ) plane.09-20-2012
20120236961APPARATUS AND METHOD FOR CYCLIC DELAY DIVERSITY IN MULTIPLE-ANTENNA WIRELESS COMMUNICATION SYSTEM - A cyclic delay diversity (CDD) technique in a multiple-antenna broadband wireless communication system is provided. An apparatus in the multiple-antenna broadband wireless communication system includes: a controller for selecting at least one sub-carrier to which CDD is applied; at least one shifter for shifting a phase of a signal mapped to the at least one selected sub-carrier; and an operator for converting the signal, which is mapped to the at least one selected sub-carrier and whose phase is shifted, and other signals mapped to the remaining sub-carriers into time-domain signals.09-20-2012
20120236960QUADRATURE COMMUNICATIONS DEVICE WITH I ANTENNAS AND Q ANTENNAS AND RELATED METHODS - A communications device may include In-phase (I) power amplifiers configured to respectively generate I amplified signals, Quadrature (Q) power amplifiers configured to respectively generate Q amplified signals, I antennas respectively coupled to the I power amplifiers, and Q antennas respectively coupled to the Q power amplifiers. The communications device may also include an I controller coupled to the I power amplifiers and configured to selectively enable some of the I power amplifiers, and a Q controller coupled to the Q power amplifiers and configured to selectively enable some of the Q power amplifiers.09-20-2012
20120236959QUADRATURE COMMUNICATIONS DEVICE WITH I ANTENNAS AND Q ANTENNAS AND MODULATED POWER SUPPLY AND RELATED METHODS - A communications device may include an In-phase (I) power amplifier configured to generate an I amplified signal, a Quadrature (Q) power amplifier configured to generate a Q amplified signal, an I digital-to-analog converter (DAC) configured to generate an I signal, and a Q DAC configured to generate a Q signal. The communications device may also include an I power supply circuit coupled to the I power amplifier and to the I DAC and configured to cause the I power amplifier to modulate an I carrier signal into the I amplified signal based upon the I signal, a Q power supply circuit coupled to the Q power amplifier and to the Q DAC and configured to cause the Q power amplifier to modulate a Q carrier signal into the Q amplified signal based upon the Q signal, and at least one antenna coupled to the I and Q power amplifiers.09-20-2012
20120236958REDUCED POWER-CONSUMPTION TRANSMITTERS - An exemplary embodiment discloses a digital control block for dynamically regulating power consumption of the transmitter; and a first driver amplifier circuit comprising a plurality of bias-modes each corresponding to a power consumption level in the transmitter, the digital control block to instruct the first driver amplifier circuit to operate in a selected bias-mode to regulate power consumption of the transmitter.09-20-2012
20130163691Method for Transmitting a Data Signal in a MIMO System - A method for transmitting a data signal by a transmission unit of a wireless multiple-input/multiple-output (MI MO) communication system. The communication system includes the transmission unit and a reception unit, the transmission unit having a plurality of transmission antennas and the reception unit having a plurality of reception antennas. The method includes performing a first transmission of a data signal, the first transmission including transmitting the data signal by each one of the plurality of transmission antennas, and performing a second transmission of the data signal at a time later than the first transmission, the second transmission including transmitting at least one spectrally modified signal variant of the data signal by at least one antenna of the plurality of transmission antennas.06-27-2013
20130163693ESTIMATING FREQUENCY-OFFSETS AND MULTI-ANTENNA CHANNELS IN MIMO OFDM SYSTEMS - Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequency-selective fading channels. A wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols. The transmitter appliex a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, and a modulator outputs a wireless signal in accordance with the blocks of symbols. A receiver receives the wireless signal and estimates the CFO, and outputs a stream of estimated symbols based on the estimated CFO.06-27-2013
20120269285METHOD FOR GENERATING AND TRANSMITTING A REFERENCE SIGNAL FOR UPLINK DEMODULATION IN A CLUSTERED DFT-SPREAD OFDM TRANSMISSION SCHEME - Disclosed is a method for generating and transmitting a reference signal in a clustered DFT-spread OFDM transmission scheme. A method for generating and transmitting a DM-RS in a clustered DFT-spread-OFDM scheme comprises: a step of generating DM-RS sequences corresponding to the number of clusters allocated for an uplink transmission; and a step of mapping the generated DM-RS sequences to the relevant DM-RS symbol positions for each cluster. Accordingly, the method for generating and transmitting a reference signal according to the present invention, in which DM-RS sequences are allocated and transmitted on a cluster basis, uses a complete DM-RS sequence for each cluster, and therefore inter-cell interference can be weakened, and problems which might occur when applied to a multi-user MIMO (MU-MIMO) scheme can be solved.10-25-2012
20120269284Method of Handling Antipodal Parauitary Precoding for MIMO OFDM and Related Communication Device - A method of transmitting a plurality of data symbols for a transmitter in a wireless communication system is disclosed. The method comprises encoding the plurality of data symbols into a plurality of precoded symbols according to an antipodal paraunitary (APU) precoding; processing the plurality of precoded symbols by using multi-input multi-output (MIMO) and orthogonal frequency-division multiplexing (OFDM), for generating a plurality of transmission symbols; and transmitting the plurality of transmission symbols via a plurality of transmit antennas according to operations of the MIMO and the OFDM.10-25-2012
20120269287APPARATUS FOR DIMENSIONING THE CONTROL CHANNEL FOR TRANSMISSION EFFICIENCY IN COMMUNICATIONS SYSTEMS - Embodiments of the invention provide methods for optimizing the spectral efficiency of control channel transmissions carrying scheduling assignments from a serving Node B to user equipments. This is accomplished by adjusting the control channel size between successive transmission time intervals according to the number of user equipments having scheduling assignments and possibly according to the modulation and coding scheme used for the transmission of each scheduling assignments.10-25-2012
20120269286OUT-OF-BAND EMISSION CANCELLATION - A transmission signal pre-processing method and apparatus for out-of-band emission cancellation are disclosed. For each of N subchannels in a band weighting each of N subchannel symbols by a calculated value in the range from 0 to 1 is performed. Precoding said N weighted symbols, organised as an N×1 matrix, by multiplication by a unitary matrix is then performed.10-25-2012
20080285678TRANSMITTER, RECEIVER, TRANSMITTING METHOD, RECEIVING METHOD, VARIABLE-LENGTH SERIAL BURST DATA TRANSFER SYSTEM, SEMICONDUCTOR DEVICE AND HYBRID SEMICONDUCTOR DEVICE - A transmitter for use in a variable-length serial burst data transfer system having the transmitter and a receiver that are connected by at least two data transmission lines and a burst start line includes a two-line encoder and a burst start signal receiving portion. During transmitting variable-length serial transmit data made up of binary digits, the two-line encoder encodes the transmit data into transmit data symbols that are each associated with each piece of transmit data in advance, inserts an identification symbol for identifying the transmit data symbols from one another between the transmit data symbols resulting from encoding to encode the transmit data, and transmits the encoded transmit data via the two data transmission lines to the receiver. During non-transmit, the two-line encoder transmits a non-transmit symbol representing a non-transmit state via the two data transmission lines to the receiver. The burst start signal receiving portion receives a burst start signal, which represents start of burst transmission of the variable-length serial transmit data, via the burst start line from the receiver. In the transmitter, the two-line encoder transmits the identification symbol to the receiver at the start of the burst transmission, and performs the burst transmission of the variable-length serial transmit data in response to the burst request signal receiving portion receiving the burst start signal from the receiver in accordance with the transmitted identification symbol.11-20-2008
20110085616DIGITAL TO ANALOG CONVERTER COMPRISING MIXER - In some embodiments, digital to analog converters are provided which comprise a plurality of cells. Each cell comprises a mixer and coupling circuitry to selectively couple a local oscillator signal to said mixer.04-14-2011
20100215118TECHNIQUES FOR MULTI-WIRE ENCODING WITH AN EMBEDDED CLOCK - Techniques for multi-wire encoding with an embedded clock are disclosed. In one particular exemplary embodiment, the techniques may be realized as a transmitter component. The transmitter component may comprise at least one encoder module to generate a set of symbols, each symbol being represented by a combination of signal levels on a set of wires. The transmitter component may also comprise at least one signaling module to transmit one or more of the symbols over the set of wires according to a transmit clock. The transmitter component may additionally comprise control logic to restrict transmission of first and second subsets of the set of symbols to respective first and second portions of a clock cycle of the transmit clock, such that a signal differential among at least two of the set of wires exhibits a switching behavior that has a same frequency as the transmit clock.08-26-2010
20110090983TRANSMISSION STRATEGY IN MBSFN SUBFRAMES - Certain aspects of the present disclosure relate to techniques for adjusting transmission gap between Multicast Broadcast Single Frequency Network (MBSFN) symbols and non-MBFSN symbols within a MBSFN subframe.04-21-2011
20120250788SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM - Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain N10-04-2012
20120224651SIGNAL GENERATION METHOD AND SIGNAL GENERATION APPARATUS - A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.09-06-2012
20110299626FEEDBACK OF CHANNEL STATE INFORMATION FOR MIMO AND SUBBAND SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM - Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback.12-08-2011
20090046803Transmitter and receiver for a wireless audio transmission system - There is provided a transmitter for a wireless audio transmission system comprising at least one analog/digital converter unit for analog/digital conversion of the analog audio signals to be transmitted, at least one digital signal processing unit with a compressing/encoding device for compressing and encoding the digitized signal to be transmitted, a digital/analog converter unit for digital/analog conversion of the digital output signals of the digital signal processing unit into analog signals, and a transmitting unit for wirelessly transmitting the output signals of the digital/analog converter unit. There is further provided a receiver for a wireless audio transmission system comprising a receiving unit for receiving wirelessly transmitted analog HF signals, an intermediate frequency unit for mixing the HF signals onto intermediate frequency signals, at least one analog/digital converter unit for analog/digital conversion of the wirelessly received signals, at least one digital signal processing unit with an expanding/decoding device for expanding and decoding the signals digitised by the at least one analog/digital converter unit, and at least one digital/analog converter unit for converting the digital output signals of the digital signal processing unit into analog signals.02-19-2009
20100166103METHOD AND APPARATUS OF TRANSMITING ENCODED MESSAGE - A method and apparatus to encode a data message and to transmit the encoded data message is provided. The method may include encoding a data packed with convolution turbo codes that include code polynomials and adding to the code polynomials a desired polynomial, padding the data message with zero bits, diminishing bits that known to the receiver and transmitting the encoded padded data message according to a combined HARQ transmission scheme.07-01-2010
20110280333DEDICATED REFERENCE SIGNAL - Systems and methodologies are described that facilitate utilizing dedicated reference signal in connection with downlink transmissions. A dedicated reference signal can comprise a set of dedicated reference symbols, which are inserted into a resource block in accordance with a specification provided by a dedicated reference signal structure. The dedicated reference signal structure can vary according to a rank utilized in the downlink transmission.11-17-2011
20110280336Enhanced Method for Transmitting or Retransmitting Packets - A method for transmitting data in a multiple-input-multiple-output space-time coded communication comprising: a. transmitting a plurality of sets of symbols over a plurality of antennae and respective transmission resources according to a mapping table, the mapping table mapping the plurality of symbols defining the communication to respective antennae from amongst the plurality of transmission antennae and to their respective transmission resource; and wherein the transmitting comprises transmitting symbols forming at least a part of a segment-level Alamouti based code in the mapping table.11-17-2011
20110280337APPARATUS AND METHOD FOR CODING SIGNAL IN A COMMUNICATION SYSTEM - Provided is an apparatus and method for encoding a voice and audio signal by expanding a modified discrete cosine transform (MDCT) based CODEC to a wideband and a super-wideband in a communication system. The apparatus for encoding a signal in a communication system, includes a converter configured to convert a time domain signal corresponding to a service to be provided to users to a frequency domain signal, a quantization and normalization unit configured to calculate and quantize gain of each subband in the converted frequency domain signal and normalize a frequency coefficient of the each subband, a search unit configured to search patch information of each subband in the converted frequency domain signal using the normalized frequency coefficient, and a packetizer configured to packetize the quantized gain and the searched patch information and encode gain information of each subband in the frequency domain signal.11-17-2011
20110280335METHOD FOR MULTI-CHANNEL TRANSMISSION WITH MULTIPLE FREQUENCY SEGMENTS - A method for multi-channel transmission with multiple frequency segments comprises the steps of: determining a plurality of non-contiguous frequency segments from an available frequency band of a communication system, wherein each frequency segment comprises a plurality of contiguous channels; determining available channels from the channels in the plurality of non-contiguous frequency segments, wherein the number of available channels is less than or equal to the number of total channels in the plurality of non-contiguous frequency segments; determining a primary channel from the available channels; performing channel bonding technique on the available channels; and performing multi-channel transmission by performing dynamic channel selection technique on the available channels.11-17-2011
20110280334DIGITAL AMPLITUDE MODULATOR AND POLAR TRANSMITTER USING THEREOF - The present invention provides a digital amplitude modulator and polar transmitter using the same. The polar transmitter includes: a polar converter for converting an input signal into an amplitude information signal and a phase information signal, and outputting the converted amplitude and phase information signal; a sigma-delta modulator for receiving a fractional part of the amplitude information signal, and generating a correcting value for an integer part of the amplitude information signal; a phase-modulator for upward-modulating the phase information signal outputted from the polar converter, and outputting carrier waves including the upward-modulated phase information signal; and a digital power amplifier for generating an output signal whose amplitude corresponds to the integer part of the amplitude information signal which is subjected to correction by the correcting value, and outputting combining the output signal with an output value of the phase-modulator to output the combined signal.11-17-2011
20110310996Spatio-Temporal Processing for Communication - A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element and/or single receiver antenna element. The system is not restricted to wireless contexts and may exploit any channel having multiple inputs or multiple outputs and certain other characteristics. Multi-path effects in a transmission medium cause a multiplicative increase in capacity.12-22-2011
20110103510RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding.05-05-2011
20100254482DIGITAL BROADCASTING ANTENNA STRUCTURE - A digital broadcasting antenna structure includes a substrate having at least a first and a second face; a main antenna arranged on the first face; an amplifier arranged on the first face and electrically connected to the main antenna; a compensating unit arranged on the second face and electrically connected to the main antenna; a bandwidth modulating unit arranged on the second face and electrically connected to the compensating unit; and a grounding section arranged on the second face and electrically connected to the bandwidth modulating unit. The digital broadcasting antenna structure can receive digital broadcasting signals without being restricted to any specific receiving direction, and is applicable to low, intermediate and high frequency bands to therefore achieve the effects of miniaturization, high bandwidth and low return loss.10-07-2010
20110110458METHODS FOR TRANSMITTING AND RECEIVING A MULTICARRIER SIGNAL COMPRISING A GUARD INTERVAL, CORRESPONDING COMPUTER PROGRAM PRODUCTS, TRANSMITTING AND RECEIVING DEVICES, AND SIGNAL - A method is provided for transmitting a multiple-carrier signal. The method includes modulating data symbols representative of a data signal to be transmitted, which includes a filtering by at least one prototype function using at least two different filtering coefficients, thus providing a modulated signal including a time sequence of multiple-carrier symbols. A hold interval is inserted in front of at least one multiple-carrier symbol of the modulated signal, thus providing the multiple-carrier signal.05-12-2011
20090310703SEQUENCE GENERATING METHOD FOR EFFICIENT DETECTION AND METHOD FOR TRANSMITTING AND RECEIVING SIGNALS USING THE SAME - A sequence generation method for allowing a reception end to effectively detect a sequence used for a specific channel of an OFDM communication system, and a signal transmission/reception method using the same are disclosed. During the sequence generation, an index is selected from among the index set having the conjugate symmetry property between indexes, and a specific part corresponding to the frequency “0” is omitted from a transmitted signal. In addition, a reception end can calculate a cross-correlation value between a received (Rx) signal and each sequence using only one cross-correlation calculation based on the conjugate symmetry property.12-17-2009
20110122964Binary Arithmetic Coding Device - An object of the present invention is to provide a binary arithmetic coding device that allows real-time processing with a higher image quality. At a timing at which a ternary data string for a target bit is outputted, an updated coding range width and an updated range width of less probability are outputted. For that reason, while a binary conversion unit (05-26-2011
20110142161TRANSMITTING SYSTEM AND METHOD OF PROCESSING DIGITAL BROADCAST SIGNAL IN TRANSMITTING SYSTEM, RECEIVING SYSTEM AND METHOD OF RECEIVING DIGITAL BROADCAST SIGNAL IN RECEIVING SYSTEM - A transmitting system and a method of transmitting digital broadcast signal are disclosed. The method of transmitting digital broadcasting signal in a transmitter includes forming a data group including mobile data, known data sequences, trellis initialization data bytes, wherein the known data sequences are sequentially concatenated with the trellis initialization bytes, interleaving data in the data group, wherein the data group includes a plurality of data blocks and scalable data blocks, wherein the known data sequences inserted in a predetermined area of the data group, trellis encoding on the interleaved data and initializing memories for the trellis encoding using initial bits of the trellis initialization data bytes in the interleaved data, wherein the initial bits of the trellis initialization data bytes are calculated using exclusive or operation with predetermined memory values of the memories for the trellis encoding, transmitting a broadcast signal including the trellis encoded data during a slot.06-16-2011
20110142157INTERLEAVING APPARATUS FOR IMPROVING TRANSMISSION PERFORMANCE AND INTERLEAVING METHOD USED BY THE INTERLEAVING APPARATUS - Provided are an interleaving apparatus for improving transmission performance and an interleaving method used by the interleaving apparatus. The interleaving apparatus determines the type of data at each element position of an interleaving matrix, reads encoded data, which corresponds to the determined type of data at each element position, from an encoder, rearranges the read data in an order determined by the interleaving matrix, and outputs the rearranged data. Since the interleaving apparatus does not include a memory, it can prevent delay in signal processing, thereby improving transmission performance.06-16-2011
20110142160METHOD AND APPARATUS FOR TRANSMITTING URGENT DATA - A method and apparatus for transmitting urgent data by embedding the urgent data in normal data is provided. An urgent data signal is embedded in a normal data signal in such a way that the normal data signal is not affected, and then the urgent data signal is transmitted together with the normal data signal thereby stably transmitting urgent data without using a separate urgent data line.06-16-2011
20110142159METHOD AND APPARATUS FOR HYBRID VIRTUAL MIMO TRANSMISSION IN WIRELESS AD-HOC NETWORK - A hybrid virtual multiple-input multiple-output (V-MIMO) transmission method of a management node in a wireless ad-hoc network in which a transmission path from a source node to a destination node is divided into one or more sections is provided. The hybrid V-MIMO transmission method includes obtaining one or more pieces of node information of one or more nodes by transmitting an information request message to the nodes in response to a transmission request message for data transmission from the source node to the destination node; setting a shortest path (SP) from the source node to the destination node based on the obtained node information; determining transmission schemes individually for nodes present on the SP; issuing a transmission preparation request by transmitting the determined transmission schemes to the respective corresponding nodes; and transmitting a transmission start message to the source node in response to transmission ready responses from the respective nodes.06-16-2011
20090207933Encoding/Decoding of Digital Signals, Especially in Vector Quantization With Permutation Codes - The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.08-20-2009
20120189079LOW DENSITY PARITY CHECK (LDPC) CODING FOR A 32k MODE INTERLEAVER IN A DIGITAL VIDEO BROADCASTING (DVB) STANDARD - A data processing apparatus communicates data bits on a predetermined number of sub-carrier signals of an Orthogonal Frequency Division Multiplexed (OFDM) symbol. The data processing apparatus comprises a parity interleaver operable to perform parity interleaving on Low Density Parity Check (LDPC) encoded data bits obtained by performing LDPC encoding according to a parity check matrix of an LDPC code including a parity matrix corresponding to parity bits of the LDPC code, the parity matrix having a stepwise structure, so that a parity bit of the LDPC encoded data bits is interleaved to a different parity bit position. A mapping unit maps the parity interleaved bits onto data symbols corresponding to modulation symbols of a modulation scheme of the OFDM sub-carrier signals.07-26-2012
20120288027HIGH SPEED SIGNALING SYSTEM WITH ADAPTIVE TRANSMIT PRE-EMPHASIS - A high-speed signaling system with adaptive transmit pre-emphasis. A transmit circuit has a plurality of output drivers to output a first signal onto a signal path. A receive circuit is coupled to receive the first signal via the signal path and configured to generate an indication of whether the first signal exceeds a threshold level. A first threshold control circuit is coupled to receive the indication from the receive circuit and configured to adjust the threshold level according to whether the first signal exceeds the threshold level. A drive strength control circuit is coupled to receive the indication from the receive circuit and configured to adjust a drive strength of at least one output driver of the plurality of output drivers according to whether the first signal exceeds the threshold level.11-15-2012
20120099672MEDIA PROCESSING METHOD, DEVICE AND SYSTEM - A streaming media processing method, device and system are disclosed in the embodiments of the present invention. The streaming media processing method includes: judging whether a transcoding is required according to the current bandwidth of a user terminal and a code rate of a pre-stored code stream, if yes, selecting a code stream of which the code rate is higher than the current bandwidth of the user terminal from the pre-stored code stream to perform the transcoding, and outputting the code stream matching the current bandwidth of the user terminal to the user terminal. The embodiments of the present invention enable the user terminal to obtain the streaming media of higher quality by effectively utilizing the bandwidth.04-26-2012
20120099671DIGITAL-INTENSIVE SIGNAL PROCESSOR - A digital-intensive signal processor including a signal converting module and a feedback module in a closed timing loop. The signal converting module converts a control signal to an output signal with phase/frequency related to the control signal. The feedback module detects the phase difference between a reference signal and a feedback signal and generates an original control signal based on the phase difference, so as to keep the phases of the output signal and the reference signal related. The feedback signal is associated with the output signal. The control signal includes the original control signal and a signal to be processed. The phase difference, original control signal, control signal, or output signal is a processed signal corresponding to the signal to be processed.04-26-2012
20110317782Methods and arrangements for employing coded transmissions - For use for example in communications or remote sensing, there is output a finite sequence of code values. A code value in said finite sequence of code values has a validity period specific to that code value. There are code values of different validity periods in said finite sequence of code values. Each of said validity periods is longer than or equal to a predetermined minimum baud length.12-29-2011
20120002750Method and Apparatus for Codebook-Based Precoding in MIMO Systems - A method including using a precoding code book for controlling transmissions from four antennas of a device, said code book including a plurality of entries, wherein said entries are such that a single layer is mapped to each selected antenna, said code book entries including different antenna pair combinations whereby one or two antenna pairs are selected for transmission.01-05-2012
20110299623DEVICE AND METHOD FOR PROCESSING BEAMFORMING FREQUENCY - The present invention discloses a device and method for processing beamforming frequency. The device for processing beamforming frequency includes a setting unit, an encoding unit, a mapping unit and a beam grouping generating unit, wherein the setting unit is used for setting an encoding matrix; the encoding unit is used for encoding input initial data according to the encoding matrix; the mapping unit is used for obtaining encoded column data from the encoding unit and mapping the encoded column data to antenna groups corresponding to subspaces; and the beam grouping generating unit is used for generating beam groups corresponding to the antenna groups. The method for processing beamforming frequency includes: setting an encoding matrix; encoding initial data according to the encoding matrix; mapping encoded column data to antenna groups corresponding to subspaces; and generating beam groups corresponding to the antenna groups.12-08-2011
20110299624DEVICE AND METHOD FOR REALIZING PREFIX CODE CONSTRUCTION - The present invention provides a device and method for realizing prefix code construction. The device includes a sort indexer, a generator and a sequence regulator. The sort indexer is used to sort a group of received code lengths to obtain a group of sorted code lengths, and record the position correspondence relationship. The generator receives the sorted code lengths and orderly generates the prefix codes. Except that the first prefix code is preconfigured, the generator generates a current prefix code by adding one to the adjacently previous prefix code and then shifting left by a certain number of bits. When the current prefix code is generated, the generator simultaneously judges whether the adjacently previous prefix code is identical to the current prefix code from the high bit, if yes, the error information is outputted; otherwise the prefix codes corresponding to the sorted code lengths are generated. The sequence regulator is used to receive the prefix codes corresponding to the sorted code lengths, and regulates the sequence of the prefix codes corresponding to the sorted code lengths according to the position correspondence relationship recorded by the sort indexer to obtain the prefix codes corresponding to the code lengths. The solution can report error in time.12-08-2011
20110299622Low Overhead Feedback Scheme for Codebook Based Closed-Loop Mimo - The present invention relates to a Multi-Input Multi-Output (MIMO) communication system and more particularly, to a method for Correlation matrix feedback in a multi-cell wireless communication system. A method for transmitting correlation matrix feedback information of a mobile station considering adaptive feedback mode in a multi-cell wireless communication system according to one embodiment of the present invention comprises measuring a channel between the mobile station and a serving base station using a signal received from the serving base station; determining a first matrix indicating channel state information and a first precoder using the measured channel; generating a second matrix using a Fourier matrix and the first matrix; and transmitting feedback information including at least one of information of the first precoder and diagonal values of the second matrix.12-08-2011
20110033007MULTI-BAND, MULTI-DROP CHIP TO CHIP SIGNALING - A system comprising: a first integrated circuit device having a multi-band transmission circuit; second and third integrated circuit devices having respective multi-band reception circuits; and a signaling link including a first stub coupled to the multi-band transmission circuit to receive a multi-band signal therefrom, second and third stubs coupled to the multi-band reception circuits of the second and third integrated circuit devices, respectively, to deliver the multi-band signal thereto, and a plurality of channel segments that extend between the first, second and third stubs to convey the multi-band transmission signal therebetween, and wherein at least one of a physical length, impedance or propagation constant of at least one of the first stub, second stub, third stub or channel segment of the plurality of channel segments is selected to spectrally position a frequency-interval exhibiting attenuated frequency response on the signaling link such that multiple passbands separated by the frequency-interval are established to enable conveyance of the multi-band transmission signal on the signaling link.02-10-2011
20100202560ANTENNA VIRTUALIZATION IN A WIRELESS COMMUNICATION ENVIRONMENT - Systems and methodologies are described that facilitate performing antenna virtualization in a wireless communication environment. A set of physical transmit antennas can be partitioned into a plurality of groups of physical transmit antennas. Further, a precoding vector for a particular group of physical transmit antennas from the plurality of groups of physical transmit antennas can be formulated. Moreover, the particular group of physical transmit antennas can form a particular virtual antenna. By way of another example, a disparate precoding vector for a disparate group of physical transmit antennas from the plurality of groups of physical transmit antennas can be formulated, and the disparate group of physical transmit antennas can form a disparate virtual antenna. The precoding vector can be applied to a signal for transmission over the particular virtual antenna, and the disparate precoding vector can be applied to a disparate signal for transmission over the disparate virtual antenna.08-12-2010
20090274244DIGITAL DELAY ELEMENT FOR DELAY MISMATCH CANCELLATION IN WIRELESS POLAR TRANSMITTERS - A circuit and method therefor provides programmable digital delay that is produced to introduces a delay in either an envelope or a phase signal path of an RF polar transmitter in order to eliminate the delay mismatch between the two paths. For two signal paths, a faster signal may be delayed by a digital processor or a slower signal may be transmitted early so that signals in the two signal paths arrive at a specified circuit node in synchronization. Timing shift may be implemented in either the envelope signal path or the phase signal path and may be used to reduce or increase the timing of a signal path.11-05-2009
20110286549Method, Device And System For Signal Encoding And Decoding - A method, device and system for signal encoding and decoding, the method comprising: encoding a core layer signal to obtain a core layer signal code; selecting an enhancement sample point that requires enhancement layer signal encoding according to the core layer signal code and the number of bits that can be used by an enhancement layer; obtaining an enhancement layer signal code of the enhancement sample point; and outputting a bit stream, where the bit stream includes the core layer signal code and the enhancement layer signal code. In embodiments of the present invention, according to the number of bits that can be used by the enhancement layer, the enhancement sample point that requires enhancement layer signal encoding is selected; the enhancement layer signal of the selected enhancement sample point is encoded and decoded; when no sufficient bits are available for the enhancement layer, the enhancement quality of the core layer can be improved.11-24-2011
20090110111SIGNAL PROCESSING APPARATUS, SIGNAL TRANSMITTING SYSTEM, AND SIGNAL PROCESSING METHOD - A signal processing apparatus, which executing a decoding process for a digital signal Manchester-encoded by assigning two bits of “10” to any one of binary digital signals “0 and “1”, and assigning two bits of “01” to the other binary digital signal, is provide with a decoding unit which executes the decoding process with a processing unit corresponding to a tern of two bits of the Manchester-encoded digital signal so as to detect only any one of the first bit and the second bit of the Manchester-encoded digital signal.04-30-2009
20110293034METHOD AND SYSTEM FOR MINIMIZING POWER CONSUMPTION IN A COMMUNICATION SYSTEM - A method for processing signals in a communication system may include adjusting a supply voltage of a pre-driver of a power amplifier in proportion to an envelope of a baseband signal so that the pre-driver amplifies a delayed version of the baseband signal. The delayed version of the baseband signal may be delayed by a number of samples of the baseband signal. The delay may be selected to minimize power consumption of the pre-driver of the power amplifier. A supply voltage for the power amplifier may be adjusted in proportion to the envelope. A bias voltage of the power amplifier may be adjusted in proportion to the envelope. The number of samples may be calculated by minimizing an amount of intermodulation distortion at an output of the power amplifier.12-01-2011
20110293038DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcasting system and a data processing method are disclosed. A receiving system of the digital broadcasting system comprises a baseband processor, a management processor and a presentation processor. The baseband processor receives a broadcast signal including mobile service data and main service data, wherein the mobile service data configure a Reed-Solomon (RS) frame. The RS frame includes at least one of the mobile service data and notification messages. The notification messages are packetized in accordance with any one of a first transport protocol and a second transport protocol. The management processor decodes the notification messages from the RS frame in accordance with any one of the first transport protocol and the second transport protocol. The presentation processor directly outputs the decoded notification messages to an output unit in accordance with a channel which transmits the decoded notification messages, or outputs the decoded notification messages to the output unit only if a user selects the notification messages.12-01-2011
20110293037METHOD FOR TRANSMITTING REFERENCE SIGNALS - A method and apparatus for transmitting reference signals in a wireless communication system is disclosed. The method and apparatus includes reference signal, RS, transmission in resource blocks supporting multiple antenna port transmission, at least one broadcast channel being provided in resource blocks belonging to a first set of resource blocks, a first number of reference signals being transmitted in at least one resource block supporting multiple antenna port transmission and a second number of reference signals being transmitted in at least one resource block belonging to a second set of resource blocks. Preferably, different resource elements, REs, are used for each reference signal in resource blocks. An example embodiment of reference signal support of, e.g., eight antenna ports is provided.12-01-2011
20110293035LEVEL SHIFTING CABLE ADAPTOR AND CHIP SYSTEM FOR USE WITH DUAL-MODE MULTI-MEDIA DEVICE - Methods and systems are described for enabling improved interface between a dual-mode multimedia source that supports a pair of data formats and a sink device operable using inputs in a third data format. An adaptor device enabling improved connectivity as well as backward compatibility with legacy devices is disclosed. The system enables the transmission of sideband channel configured in an I12-01-2011
20110293033DEVICE, SYSTEM AND METHOD OF TRANSMITTER OUTPUT POWER MANAGEMENT - Some demonstrative embodiments include devices, systems and/or methods of transmitter output power management. For example, a device may include a transmitter capable of generating a wireless communication signal, and maintaining at least one of a peak-to-average-power-ratio (PAPR) of the wireless communication signal and a transmission power of the transmitter substantially unaffected by at least one of a temperature of the transmitter and a supply voltage of the transmitter. Other embodiments are described and claimed.12-01-2011
20110299621Signal transmission system, signal processing device, reference signal transmitting device, reference signal receiving device, electronic device, and signal transmission method - Disclosed herein is a signal transmission system including: a first signal processing section configured to perform signal processing on a basis of a reference signal; a high-frequency reference signal generating section configured to generate and transmit a high-frequency reference signal having a higher frequency than the reference signal such that the high-frequency reference signal is synchronized with the reference signal; a low-frequency reference signal generating section configured to receive the high-frequency reference signal from the high-frequency reference signal generating section, and generate a low-frequency reference signal having a lower frequency than the high-frequency reference signal such that the low-frequency reference signal is synchronized with the received high-frequency reference signal; and a second signal processing section configured to perform signal processing on a basis of the low-frequency reference signal generated by the low-frequency reference signal generating section.12-08-2011
20110299625Apparatus and Method for Single User Multiple Input Multiple Output Communication Employing Cyclic Shifts - Apparatus and method for communication are provided. The apparatus includes one or more antenna ports; and a processor configured to share a cyclic shift space of reference signals of user equipment utilizing single user multiple input multiple output transmission by applying a cyclic shift increment value between reference signals of different antenna ports or spatial layers of the user equipment transmission.12-08-2011
20110286548METHOD AND SYSTEM FOR ASSIGNING REFERENCE SIGNALS IN A MULTI-ANTENNA CONTEXT - A method and system of assigning reference signals to antennas and nodes in a wireless communication system, the wireless communication system comprising N number of transmitting nodes, wherein N is an integer N≧1, is disclosed. The transmitting nodes are transmitting reference signals in a first slot and a second slot within sub-frames, over the same bandwidth. Each transmitting node has at least one transmit antenna, wherein different nodes can have different number of transmit antennas. The reference signals are of two different types, a first type of reference signals used for demodulation, and a second type of reference signals used for measurements. According to the method, reference signals of the first type is assigned to a number of transmitting nodes with at least one transmit antenna in the first and second slot in a predefined bandwidth; and reference signals of the second type is assigned to at least one transmitting node with at least transmit antennas in at least one of the first and second slot in a predefined bandwidth.11-24-2011
20110286546DIGITAL BROADCASTING SYSTEM AND METHOD FOR TRANSMITTING AND RECEIVING DIGITAL BROADCAST SIGNAL - The disclosed method for processing a digital broadcast signal in a transmitter comprises encoding signaling data including transmission parameter channel data, wherein the transmission parameter channel data includes transmission parameter for mobile service data, forming data groups including the mobile service data, the encoded signaling data and known data sequences, formatting mobile service data packets including data in the data groups, and transmitting the digital broadcast signal including the formatted mobile service data packets during slots, the slots including first type slot and second type slot.11-24-2011
20110286544LINK ADAPTATION IN MULTI-CARRIER COMMUNICATION SYSTEMS - A method for transmitting information in a multi-carrier system includes: identifying a first set of carrier signals, associated with a first code rate; and identifying a second set of carrier signals, associated with a second code rate. The method also includes partitioning a first sequence of bits representing a single symbol into a first group of bits associated with the first code rate and at least a second group of bits associated with the second code rate; interleaving a subset of bits from the first group to map multiple bits from the first group to respective carrier signals in the first set of carrier signals to achieve the first code rate; and interleaving a subset of bits from the second group to map multiple bits from the second group to respective carrier signals in the second set of carrier signals to achieve the second code rate.11-24-2011
20100135430DATA TRANSMITTING DEVICE, DATA RECEIVING DEVICE, DATA TRANSMITTING SYSTEM, AND DATA TRANSMITTING METHOD - Provided are a data transmitting device transmitting data through a delay insensitive data transmitting method and a data transmitting method. The data transmitting device and the data transmitting method use the delay insensitive data transmitting method supporting a 2-phase hand shake protocol. During data transmission, data are encoded into three logic state having no space state through a ternary encoding method. According to the data transmitting device and the data transmitting method, data are stably transmitted to a receiver regardless of the length of a wire, and provides more excellent performance in an aspect of a data transmission rate, compared to a related art 4-phase delay data transmitting method.06-03-2010
20080273623SYSTEM AND METHOD FOR SELECTIVELY PERFORMING SINGLE-ENDED AND DIFFERENTIAL SIGNALING - In a communication system, data is selectively transmitted using single-ended or differential signaling. The data is transmitted in relation to a plurality of clock signals having different relative phases. When the data is transmitted using single-ended signaling, data on adjacent signal lines undergo logic transitions at different times in relation to the plurality of clock signals.11-06-2008
20110188600Sequence Transition Point Determining Method and Apparatus Thereof - A determining method and apparatus thereof for a transition point of a sequence which can be applied to a decoder. The determining method determines the transition point of the sequence having N numbers, wherein the sequence is composed of a first value and a second value and N is a positive integer. The determining method includes determining the position the first value appearing consecutively in the sequence to determine a first interval; determining the position the second value appearing consecutively in the sequence to determine a second interval; and determining the longer interval between the first interval and the second interval, when the first interval is longer, determining an adjacency of the first interval and the second value as the transition point according to the first interval, and when the second interval is longer, determining an adjacency of the second interval and the first value as the transition point.08-04-2011
20080310545Mixed Waveform Configuration for Wireless Communications - A mixed waveform configuration for wireless communications including a first portion that is modulated according to a single-carrier modulation scheme and a second portion that is modulated according to a multi-carrier modulation scheme. The waveform is specified so that a channel impulse response (CIR) estimate obtainable from the first portion is reusable for acquisition of the second portion. The first portion includes a preamble and header and the second portion typically incorporates the payload.12-18-2008
20090232250COMMUNICATION SYSTEM, RECEIVER AND RECEPTION METHOD - A communication system includes: a transmitter adapted to transmit a synchronizing clock and serial data synchronous with the synchronizing clock over a line at low amplitude; and a receiver adapted to receive the serial data and synchronizing clock from the transmitter. The receiver includes an amplifier adapted to amplify the received synchronizing clock of low amplitude to restore the clock to its original amplitude, a latched comparator adapted to latch the received serial data in synchronism with a reproduction clock, and a phase-locked circuit.09-17-2009
20090279636CHIP AND SYSTEM UTILIZING THE SAME - A system including a pulse generating module and a processing module is disclosed. The pulse generating module generates a target signal. The processing module outputs a processing signal according to the target signal. Throughput of the target signal exceeds throughput of the processing signal.11-12-2009
20100027712EQUALIZING TRANSMITTER AND METHOD OF OPERATION - A transmitter for providing channel equalization that includes a first driver and second driver having a high pass filter. The first driver generates a first output signal representing a digital input signal. The second driver generates a second output signal representing a high pass filtered version of the digital input signal. The first and second output signals are summed to provide a third output signal that is channel equalized for transmission over a channel.02-04-2010
20110261902DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - The present invention provides a data processing method. The data processing method includes receiving a broadcast signal in which main service data and mobile service data are multiplexed, acquiring transmission-parameter-channel signaling information including transmission parameter information of the mobile service data, and fast-information-channel signaling information, acquiring binding information describing a relationship between at least one ensemble transferring the mobile service data and a first virtual channel contained in any of the at least one ensemble by decoding fast-information-channel signaling information, acquiring ensemble identification information transferring the first virtual channel using the binding information, and receiving at least one mobile service data group transferring an ensemble according to the ensemble identification information, parsing service table information contained in the ensemble and decoding content data contained in the first virtual channel using the parsed service table information, and displaying the decoded content data.10-27-2011
20110261899METHOD AND APPARATUS FOR ALLOCATING downlink RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM - Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated, and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission, and data is thereafter coded, modulated, and transmitted to each scheduled terminal from one or more transmit antennas assigned to the terminal.10-27-2011
20090168918Differential signal modulating apparatus and method thereof - A differential signal modulating apparatus and method thereof is provided. The differential signal modulating apparatus receives differential signal pairs from a transmitter, and generates multimedia streams. It is controlled by modulating the reception sequence of differential pairs to match with the transmitted sequence of differential pairs sent from the transmitter. In addition, the present invention method can be extensively applied to various interfaces.07-02-2009
20110206157REFERENCE SIGNAL DESIGN FOR DOWNLINK HIGH-ORDER MIMO - In a cellular network supporting both legacy standard-compliant mobile terminals and next generation standard-compliant mobile terminals, both legacy reference signals and next generation reference signals are supported. A method of operation of a MIMO transmitter compliant with both standards includes: defining a matrix of resource blocks within an information channel of the cellular network, wherein each resource block corresponds to a region of subcarriers of a transmission timeslot at a given frequency subband; assigning a first set of reference signals (RSs) for the legacy standard-compliant mobile terminals to resource blocks at specific locations within the matrix to be transmitted by the MIMO transmitter, the specific locations being defined by the legacy standard; and assigning a second set of RSs for the next-generation standard-compliant mobile terminals to other resource blocks within the matrix to be transmitted by the MIMO transmitter.08-25-2011
20090316824METHOD FOR TRANSMITTING A SEQUENCE OF SYMBOLS FOR EXPLOITING TRANSMIT DIVERSITY - An embodiment of a method for transmitting data through at least a channel in a wireless communication system, the method comprising at least the steps of: 12-24-2009
20090086848Apparatus and method for reducing peak-to-average power ratio in a wireless communication system - An apparatus is provided for reducing a peak-to-average power ratio (PAPR) in a wireless communication system having multiple transmit antennas. A symbol generator generates symbols to be transmitted via the multiple transmit antennas, and a PAPR calculator calculates a PAPR value for each symbol. A detector detects a maximum PAPR value among the PAPR values of the symbols. A controller outputs a control signal to reduce a PAPR value of a corresponding symbol when the detected maximum PAPR value exceeds a reference PAPR value. A PAPR reducer reduces the PAPR value of the corresponding symbol upon receipt of the control signal.04-02-2009
20110170628FILTER, AND TRANSMITTER AND RECEIVER HAVING THE SAME - In order to suppress the enlargement of the circuit layout area of an LSI together with the cost, even at the time when the variation width of the filter characteristic is narrow within a wide range, a filter varies an element value of at least one kind of elements (07-14-2011
20110170624SPACE-TIME DIGITAL POWER AMPLIFIER - Described is a space-time digital power amplifier that can be used to generate an arbitrary waveform for a carrier signal. The space-time digital power amplifier employs temporal modulation of transmit signals generated by an array of transmitter modules. The RF signals transmitted from the array are spatially combined through free space propagation to generate the desired waveform. Advantageously, no digital-to-analog conversion is required and upconversion is unnecessary. The digital power amplifiers for the transmitter modules can be combined in a single chip package. The space-time digital power amplifier enables high power efficiency to be realized using pulse-shaped waveforms thus eliminating any need for the power amplifiers to operate over a wider bandwidth with a spectrally unconfined waveform.07-14-2011
20090147882METHOD, APPARATUS AND SYSTEM FOR TRANSMITTING DATA IN SEMICONDUCTOR DEVICE - Provided is a method of inverting data that is to be transmitted and transmitting the data in a semiconductor device. The method includes inverting bits of data that is to be transmitted if the number of bit transitions of previously transmitted data and the data that is to be transmitted among sequentially transmitted data exceeds a reference number; indicating in any one of a plurality of data strobe signals that the data that is to be transmitted is inverted; and transmitting the data strobe signal indicating that the data that is to be transmitted is inverted and the inverted data.06-11-2009
20110261900MECHANISM FOR CONSTRUCTING AN OVERSAMPLED WAVEFORM FOR A SET OF SIGNALS RECEIVED BY A RECEIVER - A mechanism is provided for constructing an oversampled waveform for a set of incoming signals received by a receiver. In one implementation, the oversampled waveform is constructed by way of cooperation between the receiver and a waveform construction mechanism (WCM). The receiver receives the incoming signals, samples a subset of the incoming signals at a time, stores the subsets of sample values into a set of registers, and subsequently provides the subsets of sample values to the WCM. The WCM in turn sorts through the subsets of sample values, organizes them into proper orders, and “stitches” them together to construct the oversampled waveform for the set of incoming signals. With proper cooperation between the receiver and the WCM, and with proper processing logic on the WCM, it is possible to construct the oversampled waveform for the incoming signals without requiring large amounts of resources on the receiver.10-27-2011
20100128811APPARATUS AND METHOD FOR PRODUCING A SIGNAL TO REDUCE THE PAR IN A MULTICARRIER SYSTEM - An apparatus produces a reduction signal for a signal having a plurality of subcarriers. The apparatus has a limiter which is designed to produce a limited signal from the signal having a plurality of subcarriers; -a coefficient ascertainment unit which is designed to determine coefficients for unused subcarriers of the signal having a plurality of subcarriers from the limited signal; and -a signal generator which is designed to generate the reduction signal from the coefficients. The reduction signal is able to be combined with the signal in order to form a reduced signal. The coefficient ascertainment unit is designed to project the limited signals onto a K-th base formula.05-27-2010
20080247485Transmitting Apparatus, Receiving Apparatus and Transmitting/Receiving System for Digital Data - Disclosed is a transmitting apparatus for transmitting digital data. The transmitting apparatus includes storage unit for storing a digital data delay due to digital processing inside the transmitting apparatus; and delay information transmitting unit for transmitting delay information indicating the delay stored in the storage unit.10-09-2008
20120140847DIGITAL BROADCAST SYSTEM AND DATA PROCESSING METHOD - A digital broadcast system and a data processing method are disclosed. A data processing method of a digital broadcast transmission system includes delaying a reference time of a program clock reference (PCR) based on a size of mobile service data, when processing a broadcasting signal including main service data and the mobile service data, verifying a transport stream system target decoder (T-STD) model based on the PCR of the delayed reference time, and storing a packet of the main service data in an auxiliary buffer, when overflow of a buffer in the T-STD model is estimated as the verification result of the T-STD model.06-07-2012
20080267315Method and System for Transmitting Data from a Medium Access Control Device Via a Physical Layer to an Antenna - The invention relates to a method and a system for transmitting data from a medium access control device (10-30-2008
20090285328DATA MODULATION CIRCUIT - A data modulation circuit has an adder adding an input signal, and an output signal of a memory device; and an output circuit part discriminating and quantizing the output signal of the adder by a predetermined threshold value. The memory device receives and holds the output signal of the adder and a predetermined signal, and supplies the held signals to the adder as an output signal of the memory device.11-19-2009
20100086079APPARATUS AND METHOD FOR PROVIDING DIGITAL BROADCAST INFORMATION IN MOBILE TERMINAL - An apparatus and a method for providing digital broadcasting information in a mobile terminal are provided. The apparatus includes a channel list manager for setting a channel list according to an actual burst transmission order, and a controller for performing a process to sequentially search for channels of the set channel list using a plurality of players.04-08-2010
20100284488MIMO-OFDM TRANSMISSION DEVICE AND MIMO-OFDM TRANSMISSION METHOD - A MIMO-OFDM transmission apparatus is provided which allows high accuracy estimation of frequency offset, high accuracy estimation of a transmission path fluctuation and high accuracy synchronization/signal detection.11-11-2010
20100166107Systems and Methods for Transmitter Diversity - Methods and systems for transmitter diversity expansion are provided. The methods and systems include steps and modules for applying a number of data streams (K) to a larger number of antennas (N). This is performed by applying each of the data streams to a single base antenna, such that K data streams are applied to K base antennas, and by shifting and combining the K data streams to produce N-K data streams to apply to N-K extension antennas.07-01-2010
20100195762DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcasting system and a data processing method are disclosed. A receiving system of the digital broadcasting system comprises a baseband processor, a management processor and a presentation processor. The baseband processor receives a broadcast signal including mobile service data and main service data, wherein the mobile service data configure a Reed-Solomon (RS) frame. The RS frame includes at least one of the mobile service data and notification messages. The notification messages are packetized in accordance with any one of a first transport protocol and a second transport protocol. The management processor decodes the notification messages from the RS frame in accordance with any one of the first transport protocol and the second transport protocol. The presentation processor directly outputs the decoded notification messages to an output unit in accordance with a channel which transmits the decoded notification messages, or outputs the decoded notification messages to the output unit only if a user selects the notification messages.08-05-2010
20100195761METHOD AND DEVICE FOR TRANSMITTING A SIGNAL IN A MULTI-ANTENNA SYSTEM, SIGNAL, AND METHOD FOR ESTIMATING THE CORRESPONDING TRANSMISSION CHANNELS - A method is provided for transmitting a digital signal via n transmit antennas, wherein n is strictly greater than 2. The method includes combining with a source data vector n vectors to be transmitted respectively by each of the transmit antennas by a coding matrix M with a yield equal to 1, using reference symbols known to at least one receiver whereby it is able to estimate at least three transmission channels corresponding respectively to each of the transmit antennas. The coding matrix M applies a mathematical transformation to the reference symbols prior to the transmission thereof.08-05-2010
20130215997METHOD FOR SETTING CYCLIC SHIFT CONSIDERING FREQUENCY OFFSET - A method for transmitting a random access preamble to a base station includes generating the random access preamble from a Zadoff-Chu (ZC) sequence having a length N, wherein the random access preamble is generated by considering a cyclic shift of the ZC sequence; and transmitting the random access preamble to the base station, wherein the cyclic shift is given by using a variable M corresponding to a Doppler shift of one subcarrier spacing, and wherein parameters associated with defining the cyclic shift are differently defined based on whether the variable M is less than ⅓ of the length N.08-22-2013
20090207934Encoding/Decoding of Digital Signals, Especially in Vector Quantization With Permutation Codes - The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.08-20-2009
20130064323Turbo Coding for Upstream and Downstream Transmission in Cable Systems - A method of transmitting data in a cable modem system includes the steps of encoding the data using forward error correction. The data is then encoded with Turbo encoding. The data is then sent to a modulation scheme. The data is then transmitted over a cable channel. The data is then demodulated. The data is then decoded using a Turbo decoder. An inverse of the forward error correction is then applied to the data.03-14-2013
20100080322Digital Modulation - The present application relates to embodiments of methods and a device for digital modulation. In a first embodiment of the method, the following steps are executed: 04-01-2010
20090086844Method And System For A Programmable Local Oscillator Generator Utilizing A DDFS For Extremely High Frequencies - Methods and systems for a programmable LO generator utilizing a DDFS for extremely high frequencies are disclosed. Aspects of one method may include generating a first signal and a second signal using a base signal. The DDFS may generate the first signal, where the base signal may be divided down to provide a reference clock for the DDFS. The base signal may be divided to a lower frequency to generate the second signal. The first and second signals may be mixed to generate a third signal, which may be, for example, bandpass filtered to generate a local oscillator signal. Accordingly, the local oscillator signal, which may comprise I and Q components, may range to EHS band frequencies.04-02-2009
20100080319High Bandwidth Modulation and Transmission - This disclosure relates systems and methods for a high bandwidth modulation and transmission of communication signals.04-01-2010
20090190691Method and System for Subspace Beamforming for Near Capacity Multiple Input Multiple Output (MIMO) Performance - Aspects of a system for subspace beamforming for near capacity MIMO performance may include a MIMO transmitter that computes one or more rotation angle values (θ07-30-2009
20090175378System and Method for Impedance Mismatch Compensation in Digital Communications Systems - A system and method for digitally providing impedance mismatch compensation for a communications medium in a communications device. A method comprises producing a power amplifier (PA) output signal, providing the PA output signal to a digitally-controlled transmission line (DCTL), transforming a first load impedance to a second load impedance producing a DCTL output, and coupling the DCTL output to an antenna. The PA having the first load impedance and the transforming is controlled by a digital control word provided to the DCTL.07-09-2009
20090168920Cooperating timer and retransmission counter for buffer management in a HARQ wireless network - In a Hybrid Automatic Repeat ReQuest (HARQ) communication system, a receiver receives from a transmitter a HARQ sub-burst. A retransmission counter (RE_TX_CNT) in the receiver is incremented if either: (i) the receiver cannot decode the sub-burst, or (ii) no retransmission of the sub-burst is received within a Predetermined Retransmission Delay (PRD) interval. If RE_TX_CNT reaches a Maximal Retransmission Count (MAX_RE_CNT), then information for the sub-burst that was previously stored for HARQ purposes in a soft combining buffer in the receiver is flushed. Parameters that set the PRD interval and the MAX_RE_CNT value are pre-negotiated between the transmitter and the receiver. In another embodiment, if a novel timer in the receiver indicates that a first threshold time has elapsed after receipt of an undecodable HARQ transmission then buffered information is marked, whereas if the timer indicates that a second threshold time has elapsed then the marked information is flushed.07-02-2009
20090141827DATA TRANSFER BETWEEN CHIPS IN A MULTI-CHIP SEMICONDUCTOR DEVICE WITH AN INCREASED DATA TRANSFER SPEED - A data transfer method is disclosed in a multi-chip semiconductor device which comprises a plurality of inter-chip wires. First, a test is conducted to determine whether or not each inter-chip wire is capable of normally transferring data, on circuits arranged on chips between which the inter-chip wire is connected. When an inter-chip wire incapable of normally transferring data exists, the data transfer speed of the buffer circuit that is on the chip on the transmission and that is connected to an inter-chip wire capable of normally transferring data is increased. The buffer circuit, whose data transfer speed has been increased, transfers data which would otherwise be transferred through the inter-chip wire incapable of normally transferring data, together with the data which should be transferred thereby, to the chip on the reception side chip through an inter-chip wire connected to the buffer circuit at the data transfer speed.06-04-2009
20110200135Signaling of Precoder Related Information in a MIMO System - Techniques are disclosed for signaling a pattern of cyclic shifts and orthogonal cover codes for use by a wireless device in multi-layer transmissions. In one example method, a signal includes B bits for identifying a reference signal is received, wherein each of several available reference signals is defined by a cyclic shift and an orthogonal cover code. The B bits are used to identify the cyclic shift and orthogonal cover code according to pre-determined tables that map each value of the B bits to a pattern of cyclic shift and orthogonal cover code combinations for a multi-layer transmission scheme. The patterns for the multi-layer transmission scheme include first and second patterns based on the same cyclic shifts, but where some, but not all, of the cyclic shifts in the first pattern are associated with the same corresponding orthogonal cover codes in the second pattern.08-18-2011
20090190692LINEAR AND POLAR DUAL MODE TRANSMITTER CIRCUIT - Method and apparatus for configuring a transmitter circuit to support linear or polar mode. In the linear mode, a baseband signal is specified by adjusting the amplitudes of in-phase (I) and quadrature (Q) signals, while in the polar mode, the information signal is specified by adjusting the phase of a local oscillator (LO) signal and the amplitude of either an I or a Q signal. In an exemplary embodiment, two mixers are provided for both linear and polar mode, with a set of switches selecting the appropriate input signals provided to one of the mixers based on whether the device is operating in linear or polar mode. In an exemplary embodiment, each mixer may be implemented using a scalable architecture that efficiently adjusts mixer size based on required transmit power.07-30-2009
20120106673ODD INTERLEAVING ONLY OF AN ODD-EVEN INTERLEAVER WHEN HALF OR LESS DATA SUBCARRIERS ARE ACTIVE IN A DIGITAL VIDEO BROADCASTING (DVB) SYSTEM - A data processing apparatus is arranged to map input data symbols to be communicated onto a predetermined number of sub-carrier signals of Orthogonal Frequency Division Multiplexed OFDM symbols. The predetermined number of sub-carrier signals is determined in accordance with one of a plurality of operating modes and the input data symbols are divided into first sets of input data symbols and second sets of input data symbols. The data processing apparatus comprises an interleaver operable to perform an odd interleaving process which interleaves the first sets of input data symbols on to the sub-carrier signals of first OFDM symbols and an even interleaving process which interleaves the second sets of input data symbols on to the sub-carrier signals of second OFDM symbols.05-03-2012
20120106671TWO POWER CONTROL LOOPS FOR ANTENNA SWITCHING TRANSMIT DIVERSITY - Two power control loops for antenna switching transmit diversity are realized by a user terminal including two antennas (05-03-2012
20090274242DIGITAL BROADCAST TRANSMITTER AND RECEIVER AND METHOD FOR PROCESSING STREAM THEREOF - A digital broadcast receiver is provided. The digital broadcast receiver includes a receiver which receives a transport stream transmitted from a digital broadcast transmitter, an additional data stream detector which determines whether the received transport stream includes an additional data stream or not, and a processor which process the additional data stream if the transport stream include the additional data stream, and the transport stream including the additional data stream is a transport stream into which a training signal is inserted by the digital broadcast transmitter which resets memories used for trellis-encoding at predetermined time. Accordingly, it is easily detected whether the transport stream includes the additional data stream or not.11-05-2009
20110268221Quantized Feedback Strategies and Signal Generation - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.11-03-2011
20110268219Feedback Strategies For Constrained Codebooks Used in MIMO Precoding - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.11-03-2011
20100272212MULTI-CARRIER TRANSMISSION DEVICE AND MULTI-CARRIER TRANSMISSION METHOD - There is provided a multi-carrier transmission device capable of improving a packet error ratio in a system where transmission data is repeatedly multi-carrier-transmitted. In this device, the transmission data is subjected to error correction encoding in an error correction encoding unit (10-28-2010
20110170629METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting a reference signal in a wireless communication system are provided. The method includes generating a first sequence and a second sequence, mapping the first sequence to reference symbols in a resource block, mapping the second sequence to the same reference symbols in the resource block, and transmitting a first reference signal (RS) based on the first sequence through a first antenna, and a second RS based on the second sequence through a second antenna.07-14-2011
20110170625System and Method for Multiplexing Control and Data Channels in a Multiple Input, Multiple Output Communications System - A system and method for system and method for multiplexing control and data channels in a multiple input, multiple output (MIMO) communications system are provided. A method for transmitting control symbols and data symbols on multiple MIMO layers includes selecting a first set of codewords from N07-14-2011
20080310544Digital communications system - In a base station, after CRC is added to transmission data as a detection code, the transmission data is subjected to error-correcting coding using a convolutional code based on tail biting, divided into four frames of P-BCH and transmitted. For this reason, at a mobile station, even if reception (synthesis) is started from any frame of P-BCH represented as (b-12-18-2008
20090285327RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, AND PILOT GENERATING METHOD - A radio transmitter and so forth capable of improving the precision of frequency domain equalization while transmitting a longer pilot sequence. In a series of pilot blocks generated from one pilot sequence with the same length as a data sequence such as a CAZAC sequence, the transmitter defines the rear end of each pilot block as the cyclic prefix of the next pilot block and defines the rear end of the last pilot block as the cyclic prefix of the first pilot block.11-19-2009
20090274241Data Transmission Device and Related Method - In order to resolve problems of clock and data skews in transmission signals in a display device, the present invention provides a data transmission device including a timing controller, a plurality of source drivers and a plurality of transmission line sets. The timing controller generates a plurality of definable signals each generating at least four voltage levels. The plurality of source drivers receives the plurality of definable signals. The plurality of transmission line sets are coupled between the timing controller and the plurality of source drivers and used for transmitting the plurality of definable signals. Preferably, the plurality of definable signals are differential signals.11-05-2009
20090296849Communication Device and Transmission Calibration Weight Calculation Method - A communication device according to the present invention includes a controller 12-03-2009
20090268844Method and apparatus to link modulating and coding scheme to amount of resources - A plurality of substantially static input parameters are provided, and a plurality of signalled input parameters are also provided. From the substantially static input parameters and the plurality of signaled input parameters, an output parameter is determined that is indicative of a number of control symbols per transmission time interval for an amount of control signaling bits. The output parameter relates to a modulation and coding scheme for an uplink.10-29-2009
20110170626MULTICAST CODING METHODS AND SYSTEMS - Methods and systems for coding multicast information signals are disclosed. Signal transformations imposed by communication links with a plurality of receivers that are grouped into subsets of receivers can be determined. In addition, a coding design can be generated by employing dimension parameters that are related to achievable capacity rates of the subsets of receivers and are determined by constraining a sum of the dimension parameters to be less than or equal to a dimension of a union of subspaces of signal values that are receivable by the receivers. Output signals can be generated by applying the coding design to multicast information to compensate for the signal transformations. Further, the output signals can be transmitted to the plurality of receivers.07-14-2011
20100220807MODULATION PARAMETER SELECTING METHOD, MODULATION PARAMETER SELECTING APPARATUS, AND COMMUNICATION APPARATUS - A modulation parameter selecting method and the like is realized, that can realize a high transmission rate efficiently, in a system including, as a scheduler portion, a temporal coding rate determining portion that determines a coding rate temporarily, a temporal modulation rate determining portion for selecting a modulation method that satisfies required quality and has a maximum transmission rate in each channel, under the temporarily determined coding rate, and a transmission rate computing portion that calculates a transmission rate from the coding rate determined at the temporal coding rate determining portion and the modulation method in each of the channels selected at the temporal modulation method determining portion, in which processing from the temporal coding rate determining portion to the transmission rate computing portion is performed repeatedly with respect to selectable coding rates and a coding rate with a maximum transmission rate and a modulation method in each of the channels are determined, and thereby the coding rate is made to be common in a plurality of channels allocated to a predetermined terminal and the modulation method is made different for each of the channels.09-02-2010
20090290658Multi-Pulse Signal Generator Based on a Sawtooth Chirp - A method generating a digital waveform, pulse generators and VNAs based thereon are disclosed. The digital waveform is generated in response to user-supplied parameters defining a sawtooth chirp signal. A digital baseband chirp signal that depends on the input parameters is first generated and then the digital baseband signal is upconverted to a center frequency to form an upconverted chirp signal. The upconverted chirp signal is then converted to an M-ary signal having M levels and then (optionally) filtered through a band pass filter to attenuate frequency components of the digital chirp signal outside a predetermined band of frequencies. The digital baseband chirp signal can also include the sum of first and second chirp signals having amplitudes and phase determined to reduce variations in amplitude as a function of frequency in a predetermined band of frequencies.11-26-2009
20090296851Pre-emphasis circuit - A pre-emphasis circuit which can improve a communication quality of a data transmission at low cost is provided. A current switch circuit, a current adder circuit, and transition detection circuits are provided in a transmitter of a data transmission system. The transition detection circuits detect transitions of transmission data signals which are a differential pair. The current switch circuit receives the transmission data signals, carries driving currents in accordance with the transmission data signals, and outputs output data signals which are a differential pair. The current adder circuit receives detection signals from the transition detection circuits, and adds driving currents in accordance with the detection signals to load resistors. By this means, output data signals in which the transitions are emphasized are inputted to a transmission line.12-03-2009
20090296850ENCODED CONTROL CHANNEL INFORMATION INTERLEAVING - Systems and methodologies are described that facilitate interleaving encoded control channel information for transmission over an uplink channel. The encoded control channel information, for example, can include encoded Channel Quality Indicator (CQI) information, encoded Precoding Matrix Indicator (PMI) information, and/or Rank Indicator (RI) information. CQI information, PMI information, and/or RI information can be encoded at an access terminal, for instance, by applying a punctured Reed Muller block code to generate a sequence of encoded bits. The encoded bits can be interleaved to reorder the sequence utilizing one or more interleaving approaches. Examples of interleaving approaches that can be leveraged include prime number based interleaving, generalized bit reversal interleaving, column-row interleaving with column bit reversal, and/or M-sequence based interleaving. Further, the reordered sequence of encoded bits can be transmitted to a base station over an uplink channel.12-03-2009
20100111219COMMUNICATION METHODS AND SYSTEMS HAVING DATA PERMUTATION - A wireless communication method may include receiving a first data stream comprising a data sequence and computing a permutation sequence based on a content of the received first data stream. The permutation sequence is a non-predetermined sequence. The method may further include performing a permutation on the first data stream based on the permutation sequence to generate a permuted first data stream being configured for wireless transmission.05-06-2010
20110200138COMMUNICATIONS APPARATUS AND COMMUNICATIONS SYSTEM USING MULTICARRIER TRANSMISSION MODE - A communications apparatus accommodated in a communications system for exchange of information between a communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers. The communications apparatus comprises of a dedicated transmission data generator for each communications apparatus, configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between each communications apparatus and a transmitter configured to transmit the dedicated frequency band information for each communications apparatus by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system, in which the specific frequency band is set as a primary band in frequency band assigned to the communication system.08-18-2011
20110200136DIGITAL BROADCASTING SYSTEM AND METHOD FOR TRANSMITTING AND RECEIVING DIGITAL BROADCAST SIGNAL - The disclosed method of processing a digital broadcast signal comprises encoding signaling data for signaling of mobile service data, forming data groups, wherein the data groups include a first data group, a second data group and a third data group, and transmitting the digital broadcast signal including the data groups, wherein the signaling data includes first information indicating whether a segmented known data sequence of the second data group is concatenated to a segmented known data sequence of the first data group to form a known data sequence, and/or second information indicating whether a segmented known data sequence of the second data group is concatenated to a segmented known data sequence of the third data group to form a known data sequence.08-18-2011
20080212710METHOD AND APPARATUS FOR FREQUENCY DIVISION MULTIPLEXING - A radio transmitter and receiver arrangement includes a transmitter and a receiver. The transmitter generates an electromagnetic carrier that varies in frequency throughout a channel interval, and modulates the carrier with an information signal during the channel interval, whereby the carrier is modulated both in frequency and in accordance with the information signal during the channel interval. The receiver receives the carrier that is modulated both in frequency and in accordance with the information signal, generates a detection signal that varies in frequency throughout the channel interval, and mixes the carrier and the detection signal to recover the information signal.09-04-2008
20110268220Restricted Codebooks And Related Signaling To Perform Beamforming - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.11-03-2011
20110268223Closed-Loop MIMO Transmission and its Related Signaling - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.11-03-2011
20110268222Successive Codebook and Feedback in Precoding Systems - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.11-03-2011
20100061481CURRENT CANCELING VARIABLE GAIN AMPLIFIER AND TRANSMITTER USING SAME - A current canceling CMOS variable gain amplifier includes a first leg and a second leg. The first leg has a first input line, a first output line, a first ON transistor, a first control transistor and a first subtracting transistor. The second leg has a second input line, a second output line, a second ON transistor, a second control transistor and a second subtracting transistor. The second input line can provide a second input current. The second output line can provide a second output current. The first input line is arranged to provide a first input current to each of the first ON transistor, the first control transistor and the first subtracting transistor. The second input line is arranged to provide a second input current to each of the second ON transistor, the second control transistor and the second subtracting transistor. The first output line is in electrical connection with each of the first ON transistor, the first control transistor and the second subtracting transistor. The second output line is in electrical connection with each of the second ON transistor, the second control transistor and the first subtracting transistor.03-11-2010
20100061480RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION TERMINAL - The present invention is summarized as a radio communication method including the steps of calculating a transmission power difference between a transmission power value of a first carrier and a transmission power value of a second carrier; determining whether or not the transmission power difference exceeds a threshold which indicates a maximum transmission power difference allowable between the first carrier and the second carrier; and decreasing a data rate for transmission via one of the first carrier and the second carrier that has the higher transmission power value when the transmission power difference exceeds the maximum transmission power difference.03-11-2010
20100290558SYSTEMS AND METHODS FOR IMPLEMENTING RECEIVER TRANSPARENT Q-MODE - In a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by a transmitter, the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the transmitter could enter and exit Q-mode as desired while the receiver, could, for example, continue to function as if operating normally, such as in “showtime.” Through this approach, it is not necessary for the receiver to detect the transmitter's entry and exit of Q-mode.11-18-2010
20080317161TRANSMIT POWER CONTROL MODULE AND ASSOCIATED METHOD FOR TRANSMIT POWER CONFIGURATION12-25-2008
20110206158TRANSMITTER AND METHOD FOR TRANSMITTING MULTIPLE INPUT MULTIPLE OUTPUT AND RECEIVER AND METHOD FOR RECEIVING MULTIPLE INPUT MULTIPLE OUTPUT - A transmitter that transmits data using a multiple antenna includes a multiple description coder that generates a plurality of descriptions by performing multiple description coding of the data, and a multiple input multi output (MIMO) transmitting unit that performs channel coding of the plurality of descriptions and that transmits a description in which channel coding is performed through the multiple antenna.08-25-2011
20090034650SEMICONDUCTOR INTEGRATED CIRCUIT AND METHOD FOR OPERATING ULTRA WIDE BAND-IMPULSE RADIO-TRANSMITTER - Provided is a semiconductor integrated circuit, in which a transmit pulse having an impulse waveform is produced using pull-up and pull-down currents of the charge pumps of pattern-generating cells of the pattern generator. During the first calibrating operation of semiconductor integrated circuit, the variation in amplitude of the transmit pulse is detected. At least one of pull-up and pull-down currents of the charge pumps is controlled according to a first calibration control signal responsive to the result of detection of the amplitude. During the second calibrating operation, the fluctuation in DC level just after producing of a repeat pulse of the transmit pulse is also detected. Imbalance between the pull-up and pull-down currents of the charge pumps are lowered according to a second calibration control signal responsive to the result of detection of the DC level fluctuation.02-05-2009
20090034649Constructive method of peak power reduction in multicarrier transmission - A plurality of bits is transmitted by partitioning the bits among n subsets; encoding each subset as a respective symbol; selecting a balancing vector, in accordance with the symbols, from a set of size 202-05-2009
20100128812Efficiently computing a divisor - In one embodiment, the present invention includes a method for receiving a first and second inputs, calculating a sum/difference of the first and second inputs in parallel with determining a least significant zero (LSZ) vector using the first and second inputs, and determining a shift value based on the LSZ vector, where the shift value is used to perform a shift operation on the sum/difference. Other embodiments are described and claimed.05-27-2010
20100135432Wireless Transmission Apparatus, Wireless Reception Apparatus and Block Construction Method - A wireless transmission apparatus in which degradation of error-rate characteristics can be avoided without decreasing a data rate in the mobile communication using a pre-coding together with a FDE. In this apparatus, a modulation unit (06-03-2010
20100128814PSEUDO-DIFFERENTIAL INTERFACING DEVICE HAVING A BALANCING CIRCUIT - The invention relates to an interfacing device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention includes signal terminals and a common terminal. A transmitting circuit receives the input signals of the transmitting circuit coming from a source. The output of the transmitting circuit delivers, when the transmitting circuit is in the activated state, voltages between one of said signal terminals and said common terminal. A receiving circuit delivers, when the receiving circuit is in the activated state, output signals of the receiving circuit determined each by the voltage between one of the signal terminals and the common terminal, to the destination. The balancing circuit is such that, when the transmitting circuit is in the activated state, the current flowing out of the common terminal approximates the opposite of the sum of the currents flowing out of the signal terminals.05-27-2010
20120294387EXTENDED BANDWIDTH DIGITAL DOHERTY TRANSMITTER - An extended bandwidth digital Doherty transmitter includes a baseband signal processing block including a digital predistortion unit. It also includes a digital signal distribution unit and a digital phase alignment unit, a signal up-conversion block, an RF power amplification block including the carrier amplifier and one or two peaking amplifiers; and an RF Doherty combining network. In another aspect, a digital Doherty transmitter includes a baseband signal block including a digital predistortion unit, a digital signal distribution unit and an adaptive digital phase alignment unit. In this aspect a signal up-conversion block includes three digital-to-analog converters (DACs) and a tri-channel up-converter or three single-channel up-converters. There is also an RF power amplification block including the carrier amplifier and two peaking amplifiers, and an RF Doherty combining network which includes quarter wavelength impedance transformers.11-22-2012
20080279303Repetition-Dependent Mapping For Higher Order Modulation Schemes - A method and apparatus is disclosed, for digital data transmission using higher order modulation schemes, wherein a plurality of bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of the bit positions. Bits are selected from a data stream of original bits for repetition and repeated. Repeated and unrepeated bits are mapped to modulation symbols, wherein the mapping of bits to bit positions depends on the error probabilities of the bit positions and on the selection result.11-13-2008
20080279305RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, AND M-ARY MODULATION COMMUNICATION SYSTEM - P/S conversion section 11-13-2008
20080285677Apparatus and Method For Transmitting Signals With Multiple Antennas - An apparatus for transmitting signals with multiple antennas is disclosed. The multiple antenna transmission apparatus performs space-time encoding or space-frequency encoding, and cyclically delays the encoded symbol with a plurality of delay-values to generate a plurality of delayed symbols. The multiple antenna transmission apparatus transmits the plurality of delayed symbols to the channel through a plurality of antennas. By changing the number of space areas for encoding and the number of delay-values for delaying, the number of antennas for the multiple antenna transmission apparatus is easily expanded.11-20-2008
20080285680Reconfigurable Alamouti/ABBA decoder circuit, system, and method - A decoder apparatus for decoding a first input set of demodulated data elements obtained by demodulating transmitted data elements received over a transmission channel so as to obtain a corresponding output set of decoded data elements. The decoder apparatus includes a first register a first selector coupled to the first register, a second selector coupled to the second register, and a combiner coupled to the first and the second selection circuits and operable to combine selected demodulated data elements with selected channel description elements. The decoder apparatus still further includes a controller coupled to the first and second selectors and to the combiner, that is adapted to generate a plurality of signals defining a control sequence for driving the first and second selectors and the combiner. Said controller is adapted to be configured so as to generate at least two control sequences according to the selected transmission diversity scheme.11-20-2008
20080285679BROADCASTING SERVICE TRANSMISSION/RECEPTION METHOD AND APPARATUS FOR PROVIDING FAST ACCESS TO BROADCASTING SERVICE - Provided are a method and apparatus for providing fast access to a broadcasting service transferred. The apparatus includes a reception unit for receiving one or more transmission frame; a transmission frame processing unit for analyzing access information required to access a turbo stream for a primary service to be primarily processed from a predetermined region of each transmission frame and accessing the turbo stream for the primary service of each transmission frame by using the analyzed access information; and a turbo stream processing unit for processing the turbo stream.11-20-2008
20080285676TRANSMISSION OF ANALOG SIGNALS IN A SYSTEM-ON-CHIP - A circuit of a system-on-chip for the transmission of an analog signal at a given transmission frequency modulated by a digital input signal coded in a number m of bits, includes 211-20-2008
20100054360Encoder, Transmission Device, And Encoding Process - An encoder for successively receiving a plurality of data blocks and encoding each of the plurality of data blocks includes a plurality of element encoding units and a switch unit. The switch unit distributes each of the plurality of data blocks among the plurality of element encoding units. The plurality of element encoding units determine initial states of the plurality of element encoding units by using the plurality of data blocks, and encode the plurality of data blocks on the basis of the initial states.03-04-2010
20100002799CDM signal transmitter with modulators reduced in number and a method therefor - A code division multiplex signal transmitter includes an operational circuit, a modulator unit and a multiplexer. The operational circuit adds up input transmission data on channels to produce resultant added data and modulates pieces of bit transmission data which are indicative of the values of the respective bits of the added data, when expressed in binary form, the pieces of bit transmission data being equal in number to the M bit positions of the added data expressed in binary form. The modulator unit includes modulators corresponding in number to the M bit positions of the added data in the binary form. A k-th modulator, where k is an integer of 1 to M, inclusive, modulates a k-th piece of bit transmission data to produce a k-th bit modulated signal whose amplitude level is 201-07-2010
20100002800Method and apparatus of transmitting reference signal for uplink transmission - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. The method includes generating a precoded reference signal or a non-precoded reference signal in accordance with a rank, and transmitting the generated reference signal. Uplink transmission using multiple transmit antennas is supported through reference signal design and related control signaling.01-07-2010
20120294386Pulse Harmonic Modulation Systems And Methods - The various embodiments of the present disclosure relate generally to pulse harmonic modulation systems and methods. An embodiment of the present invention provides a pulse harmonic modulation method comprising transmitting a first data initiation pulse to an input of a first resonant circuit thereby creating an oscillating waveform at an output of a second resonant circuit and transmitting a first modifying pulse to the input of the first resonant circuit. The first modifying pulse can modify a first portion of the oscillating waveform.11-22-2012
20120294385INTERFERENCE ALIGNMENT FOR CHANNEL-ADAPTIVE WAVEFORM MODULATION - Embodiments provide an apparatus and method for interference alignment for channel-adaptive waveform modulation. The method includes obtaining at least a part of a first matrix and a part of a second matrix for the impulse response function of a communication channel. The method further includes designing a set of one or more linearly independent waveforms based on at least the obtained parts of the first and second matrices such that a first subspace spanned by the linearly independent waveforms when multiplied by the obtained part of the first matrix at least partially overlaps a second subspace spanned by the linearly independent waveforms when multiplied by the obtained part of the second matrix.11-22-2012
20110222628METHOD FOR TRANSMITTING DATA IN A RADIO COMMUNICATION SYSTEM - A method for transmitting data in a wireless communication system comprises: receiving synchronization signals and midambles transmitted through a plurality of antennas; and estimating each channel of the plurality of antennas by using the synchronization signals and the midambles, wherein the synchronization signals and the midambles are transmitted such that the channels of the plurality of antennas are combined. Respective channel states of a plurality of antennas can be estimated by using the synchronization signals and the midambles, and data can be effectively transmitted.09-15-2011
20110007835DIGITAL BROADCASTING TRANSMITTER, RECEIVER AND METHODS FOR PROCESSING STREAM THEREOF - A digital broadcasting transmitter includes a known data inserting unit which inserts a known data to a stream, and a trellis encoding unit which encodes the stream sequentially using a plurality of trellis encoders, wherein the known data inserting unit inserts the known data to the specific location of the stream, so that the known data may be trellis encoded by at least one specific trellis encoder.01-13-2011
20110007836SAMPLE RATE CONVERSION IN DELTA-SIGMA MODULATORS - Transmitter comprising a delta-sigma modulator (DSM), a sample rate converter (SRC) situated downstream of the delta-sigma modulator with respect to a direction of transmission signal flow, and a switching amplifier (SA) situated downstream of the sample rate converter (SRC) with respect to the direction of transmission signal flow. The invention as defined above allows for a decoupling of the clock frequency of the delta-sigma modulator (DSM) and the carrier frequency, for example in radio frequency (RF) signal generation applications using delta-sigma modulators. With the invention described herein it is possible to design the delta-sigma modulator independently of the carrier frequency.01-13-2011
20100135428MULTIANTENNA RADIO TRANSMITTING APPARATUS AND MULTIANTENNA RADIO TRANSMITTING METHOD - There are disclosed a multiantenna radio transmitting apparatus and others wherein control information can be transmitted with enhanced reliability while overheads of transport signals being reduced. This apparatus uses a transmission antenna (Tx) (06-03-2010
20100135433SIGNAL GENERATION DEVICE AND SIGNAL GENERATION METHOD - A signal generation device that employs a transmission method that uses inverse Fourier transform includes: a modulation unit configured to modulate transmission data to obtain modulation data; a serial-parallel conversion unit configured to convert the modulation data input in series to parallel data of a prescribed size smaller than the size of inverse Fourier transform; a duplication unit configured to select and duplicate all or a portion of the parallel data, to obtain duplication data; a phase rotation unit configured to rotate the phase of a signal point at a prescribed rate for the duplication data, to obtain phase rotation data; and an inverse Fourier transform unit configured to carry out inverse Fourier transform on the parallel data obtained from the serial-parallel conversion unit and the phase rotation data obtained from the phase rotation unit.06-03-2010
20100135431MODULATING DEVICE AND METHOD, DEMODULATING DEVICE AND METHOD - A modulation device uses two base signal axes including a cosine function and two base signal axes including a sine function to modulate bit information and generate a modulation symbol. Accordingly, the frequency efficiency characteristic is improved while maintaining a great power efficiency characteristic.06-03-2010
20090086847Methods and systems for providing variable clock rates and data rates for a serdes - A method and apparatus for varying an output clock signal frequency to match the frequency of an output data signal frequency for a SERDES circuit while maintaining a constant input clock frequency is shown. According to this method and apparatus, a PMA rate signal may control the frequency of the output clock while a datastrobe signal may be used to control the frequency of the data signal. Accordingly, the apparatus and methods may be used to produce an output data signal and a clock signal having frequencies that may be lower than the frequency of the input clock signal.04-02-2009
20080240284SYSTEM AND METHOD FOR DIGITAL MODULATION - The present invention is directed to a system and method which allows for power amplification of an input signal using power amplification combined by changing the center frequency with an up-converter to shift a baseband signal to a signal at a carrier frequency in the same process. This then provides a digital implementation that is power efficient and has little or no linearity issue-technology suitable for a silicon chip and broadband operation. In one embodiment, each input sample is replaced with a number of sub-samples within the same sample interval, the total weight of the sub-samples being equal to the replaced sample. This sample to sub-samples process alters the frequency response of the sampled signal and reduces the amplitude dynamic range of the load driver, thereby simplifying the filter requirements for digital to analog conversion while reducing linearity requirement of the load driver. This process can be implemented by digital circuits which results in broadband operation.10-02-2008
20090161790Pre-emphasis automatic adjusting method and data transmission system using same - A signal transmission system is provided which is capable of simplifying circuits and shortening time required for automatic adjustment of pre-emphasis. A signal having a single pulse pattern is generated by a single pulse pattern generating circuit. A signal having passed through a selector is divided into two signals whose phases are inverted and which are transmitted to a receiving circuit. An eye aperture of an eye waveform in a direction of time is measured by an eye aperture judging section by using the two signals and a sampling clock output from a sampling clock controlling section. An adjustment controlling section compares the measured eye aperture with a target value for judgment and transmits the judgment result to the transmitting circuit, where pre-emphasis is adjusted based on the judgment result.06-25-2009
20090161792System and Method for Adapting to a Change in Constellation Density While Receiving a Signal - One embodiment comprises a transmitter precoder operating on an input signal to produce an output signal for modulation. The output signal is transmitted using a constellation with a constellation density. The transmitter precoder comprises scaler logic, precoder logic and selection logic. The scaler logic scales the input signal to maintain constant power on the input signal independent of the constellation density. The precoder logic precodes the scaled signal to produce a dither signal limited to a range of values. The range is inversely proportional to the constellation density. The selection logic is operable in two states. In the first state, the selection logic combines the scaled signal with the dither signal to produce the output signal. In the second state, the selection provides the scaled signal as the output signal.06-25-2009
20090180571DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA - A digital broadcasting system and method of processing data are disclosed. Herein, a transmitting system within the digital broadcasting system includes a byte-symbol converter, an interleaving unit, a block formatter, and a trellis encoding module. Herein, the byte-symbol converter converts inputted mobile service data to symbol units. The interleaving unit is provided with (N−1) number of block interleavers in parallel, and interleaves the symbols outputted from the byte-symbol converter. The block formatter controls output orders of the mobile service data being inputted and data being outputted from each block interleaver within the interleaving unit. The trellis encoding module is provided with a plurality of trellis encoders in parallel, and enables each trellis encoder trellis-encode the mobile service data.07-16-2009
20090180570HYBRID ON-CHIP REGULATOR FOR LIMITED OUTPUT HIGH VOLTAGE - A driver circuit provides fast settling times, slew rate control, and power efficiency, while reducing the need for large external capacitors. A voltage reference circuit generates a voltage reference signal. A comparator compares the voltage reference signal and a driver output signal and generates an output high voltage control signal. An output driver includes a first and a second switch that are coupled together. The first and second switches are further coupled to generate the driver output signal in response to coupling the output high voltage control signal to the control terminal of the first switch and coupling an input signal to the control terminal of the second switch.07-16-2009
20110268224Feedback Generation in Multiple Antenna Systems - A quantized multi-rank beamforming scheme for multiple-antenna systems such as a multiple-input-multiple-output (MIMO) wireless downlink. User equipment (UE) estimates downlink channel and transmit power and determines rank and power allocations. A quantized beamforming matrix is then determined by the UE using successive beamforming. The UE also determines channel quality indices (CQI) which it feeds-back to the wireless downlink base station along with the index of the quantized beamforming matrix. The base station uses the CQI information to select a UE for scheduling of downlink transmission and the quantized beamforming matrix index received from the selected UE to beamform the downlink transmission to the UE. Base station overhead and is minimized while providing near-optimal performance given the constraints of a limited feed-back channel and computational complexity of the UE.11-03-2011
20110268218ELECTRONIC DEVICE AND METHODS OF SENDING INFORMATION WITH THE ELECTRONIC DEVICE, CONTROLLING THE ELECTRONIC DEVICE, AND TRANSMITTING AND RECEIVING INFORMATION IN AN INFORMATION SYSTEM - An electronic device includes a display unit, a communication unit communicating with one or more external electronic devices, and a controller controlling a display unit to display information about the one or more external electronic devices in a first region, corresponding to a first side of a plurality of sides of the display unit, and displaying detailed information related to an image, displayed in a middle region of the display unit, in a second region corresponding to a second side different from the first side from among the plurality of sides.11-03-2011
20110268217SYSTEMS AND METHODS FOR COORDINATING THE SCHEDULING OF BEAMFORMED DATA TO REDUCE INTERFERENCE - A system and method are disclosed for coordinating the scheduling of beamformed data to reduce interference in a wireless system. A first optimum phase adjustment is determined to increase the gain of an intended signal at a mobile device. A second optimum phase adjustment is determined to decrease the gain of interfering signals received at the mobile device. Using a phase adjustment map, a transmission is scheduled at a base station within wireless resources using the first optimum phase adjustment, at the same time an interfering base station is transmitting at the second optimum phase adjustment angle. Thus, signal strength is greatly improved while interference is greatly reduced, improving the efficiency of the wireless system.11-03-2011
20110268216Transmitter Gain Control and Calibration - Embodiments provide improved systems and methods of gain control and calibration for wireless transmitters. In particular, embodiments allow linear gain control over the entire transmitter gain control range, independent of temperature/process variations. Embodiments require very low power consumption compared to existing approaches. Embodiments may also be used for gain control calibration during production time, thereby substantially reducing production calibration time and cost.11-03-2011
20110206159Method of Transmission Power Control and Communication Device - In a method of transmission power control, transmission powers of transmission channels and/or transmission power spectral densities are adjusted so as to improve the transmission characteristics.08-25-2011
20090161788Method for Receiving Frames of a Digital Stream - A receiving method for a digital stream, the stream including frames having each a body composed of a variable number c of symbols and preceded by a header including d symbols, a field composed of a fixed number e of symbols unknown to the receiver and defining the number c. A locking phase of the receiving method includes receiving a series of e symbols of the stream; 06-25-2009
20090161789RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - Disclosed are a radio sending device and a radio sending method for improving a throughput while keeping a receiving quality. In this radio sending device, an MCS switching control unit (06-25-2009
20090129500SYSTEM AND METHOD FOR DELIVERY OF VIDEO, CONTENT ON DEMAND AND IP PACKETS - The present application describes a method and filter for shaping a series of pulses spaced in time for subsequent transmission in a communications system, each of the pulses having a magnitude comprising the steps of providing a generic shaped pulse, for each pulse in the series, generating a shaped pulse by scaling the generic shaped pulse by an amount proportional to the magnitude, wherein at least a portion of each generated pulse overlaps in time with at least a portion of at least one subsequent generated pulse, and combining the overlapping portions of the generated pulses.05-21-2009
20120140844METHOD FOR SETTING CYCLIC SHIFT CONSIDERING FREQUENCY OFFSET - A method for transmitting a random access preamble to a base station at a user equipment (UE) includes generating the random access preamble from a Zadoff-Chu sequence having a length ‘N’ and a root index ‘M’, wherein the random access preamble is defined by a cyclic shift of the Zadoff-Chu sequence and transmitting the generated random access preamble to the base station via a random access channel, wherein the cyclic shift is given by using a variable corresponding to a Doppler shift of one subcarrier spacing, the variable given by using the root index ‘M’, and wherein the cyclic shift is differently given based on whether the variable is smaller than ⅓ of the length ‘N’.06-07-2012
20120140842SIGNALING TO PROTECT ADVANCED RECEIVER PERFORMANCE IN WIRELESS LOCAL AREA NETWORKS (LANS) - Certain aspects of the present disclosure relate to techniques that may be used to help control aspects of beamforming by a beamformee. According to certain aspects, a beamformee may be able to signal, to a beamformer, a maximum number of transmit spatial streams to use for single-user beamformed transmissions.06-07-2012
20120069929METHOD AND APPARATUS FOR COMPENSATING CODE CHANNEL POWER IN A TRANSMITTER - It has now been found that in some transmitter implementations which transmit multiple code channels, for example CDMA transmitters, the observed power for each code channel at the output relative to the other code channels is dependent upon the total transmit power due to non-linearities in the transmitter. Methods and apparatus are provided which use pre-set digital gains or digital gain adjustments to compensate for the non-linearities as a function of total transmit power such that at the output, the desired relative powers are observed.03-22-2012
20080317164Circuit board, information processing apparatus, and transmission method - One aspect of the invention is directed to the provision of a circuit board mounted with a plurality of circuit components connected via a transmission line. The circuit components mounted on the circuit board includes at least a signal processor for processing a signal, a driver for transmitting the signal, and a receiver for receiving the signal. The driver includes a basic buffer, which is always on, and at least one control buffer, which can be individually controlled on and off, and which is connected in parallel with the basic buffer, and the output impedance of the basic buffer is set higher than the characteristic impedance of the transmission line.12-25-2008
20080317159Radio Communication System, a Radio Station, and Method of Transmitting Data - A radio communication system has a plurality of transmission formats available for transmitting data signals, and a pilot signal is transmitted during the transmission of data to enable channel estimation. The transmit power of the pilot signal is varied depending on the current transmission format of the data, and is reduced in the periods between data transmissions.12-25-2008
20110222626RETRANSMISSION APPARATUS AND METHOD - A retransmission method maps at least some bits of codeword to symbols according to a first modulation method at the time of first transmission. The retransmission method maps at least some bits of the codeword to symbols according to a second modulation method that is different from the first modulation method at the time of second transmission after the first transmission. In this case, the second modulation method may have a lower modulation order than that of the first modulation method, or a sum of average reliability per bit of symbol according to the second modulation may be larger than a sum of average reliability per bit of symbol according to the first modulation method.09-15-2011
20110222625METHOD AND APPARATUS FOR SHARING CHANNEL STATE INFORMATION (CSI) IN A MULTIPLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MU-MIMO) ENVIRONMENT - Provided is a channel state information (CSI) sharing method and apparatus in a Multiple User Multiple Input Multiple Output (MU-MIMO) environment. Each node may use network-coding to reduce overhead necessary for sharing CSI between all nodes in the MU-MIMO environment. A transmitter may dynamically select, based on the CSI between receivers, a path used for transmitting data to each receiver and a receiver to be used as a relay based on the global CSI. A decoding performance may be improved based on the CSI between the transmitter and the receivers.09-15-2011
20110222623Communication Interface With Configurable Encoding Based on Channel Termination - An improved data transmission system is disclosed in which data encoding such as Data Bus Inversion (DBI) in a transmitting device is matched to the termination scheme being used in a receiving device. In the improved system, the transmitting device is able to automatically discover the termination scheme being used in the receiving device, and is thereby able to automatically implement a data-encoding algorithm to best match the termination scheme being used. In one example, Information concerning the termination scheme can be communicated to the transmitting device via a control channel, or another channel otherwise dedicated to data encoding such as a DBI channel. In another example, the transmitting device can infer the termination scheme being used via measurements, or by understanding how the receiving device will modify its termination scheme given current data transmission conditions. Alternatively, the receiving device is able to discover the data encoding scheme used in the transmitting device and is able to configure its termination circuitry accordingly.09-15-2011
20090052572Method and System for Transmitting Signals with Reduced Spurious Emissions - An RF power amplifier architecture minimizes spurious emissions by breaking the transmitted signal into narrow spectrum sub-bands, amplifying each separately, and then combining the signals for transmission purposes.02-26-2009
20090052573METHOD AND APPARATUS FOR FORWARD LINK POWER CONTROL - A forward link power control mechanism measures the reverse link power control bits which are transmitted on the forward traffic channel. At the remote station, the reverse link power control bits from multiples base stations or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station generates a set of forward link power control bit in accordance with the measurements and transmits these bits to all base stations in communication with the remote station. Each base station adjusts its gain of the forward traffic channel in accordance to its measurement of the forward link power control bit.02-26-2009
20090074104SUBDIMENSIONAL SINGLE-CARRIER MODULATION - A method for modulating a sequence of data symbols such that the transmit signal exhibits spectral redundancy. Null symbols are inserted in the sequence of data symbols such that a specified pattern of K data symbols and N−K null symbols is formed in every period of N symbols in the modulated sequence, N and K being positive integers and K being smaller than N.03-19-2009
20110228877METHOD AND APPARATUS FOR SIGNAL TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for signal transmission in a wireless communication system. The apparatus comprises: an information processor for generating a first information sequence based on a first transmission symbol and a first resource index, and a second information sequence based on a second transmission symbol and a second resource index; a reference signal generator for generating a different reference signal depending upon whether a first resource block indicated by the first resource index and a second resource block indicated by the second resource index are the same; and an antenna for transmitting a signal generated based on the first information sequence, the second information sequence, and the reference signal sequence.09-22-2011
20110228875MODIFIED PREAMBLE FOR PROGRAMMABLE TRANSMITTER - A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Generally, the invention includes generating a preamble with an arrangement that depends upon whether a Greenfield (high data rate) or mixed mode transmission is to occur and that depends upon a number of spatial streams that are to be generated. One format for high data rate transmission includes a short training sequence, a long training sequence and a signal field. The mixed mode transmission further includes a legacy prefix.09-22-2011
20130215998OFDM-CDMA EQUIPMENT AND METHOD - An OFDM signal transmission apparatus is provided, which includes a mapping unit configured to map first signals into N subcarriers and second signals into M subcarrier(s) to form an OFDM signal, wherein N is larger than M. The first signals are each indicating a same bit of retransmission information and the second signals are each indicating a same bit of information other than retransmission information. The OFDM signal transmission apparatus further includes a transmitting unit configured to transmit the formed OFDM signal.08-22-2013
20130215994COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A serial-parallel converter generates a subcarrier modulation signal from a modulation signal which is generated from the input signal by a modulator. An IFFT unit performs an inverse fast Fourier transformation on the subcarrier modulation signal. A divider divides a calculation result to generate first subdata. A disperser adds dispersion coefficients to elements of first subdata. A sorter generates second subdata from post-dispersion first subdata. An operator performs a predetermined calculation using elements in the same line of the post-dispersion first subdata and second subdata. A corrector subtracts correction coefficients from elements of post-average first subdata. A synthesizer arranges post-correction first subdata in positions at the time of division and synthesizes them to generate a baseband signal. A transmitter generates a transmission signal to transmit.08-22-2013
20110142162DATA TRANSMITTING METHOD AND DATA TRANSMITTING STRUCTURE - A data transmitting structure and a data transmitting method are disclosed. The data transmitting structure includes an input buffer layer and an output buffer layer. The input buffer layer includes N input latches connected sequentially in series. The 1st input latch of the input buffer layer is coupled to a data module. The output buffer layer includes N output latches connected sequentially in series. The 1st output latch of the output buffer layer is coupled to the Nth input latch of the input buffer layer. When the input buffer layer is turned on, the data in the data module are sequentially loaded into the input buffer layer, and then the data in the input latches are sequentially transmitted to the output latches of the output buffer layer. Finally, the data are sequentially transmitted to the Nth output latch of the output buffer layer and outputted from the Nth output latch.06-16-2011
20110142158OFDM modem for transmission of continuous complex numbers - The invention enables the transmission of continuous complex numbers using a symbol based transmission scheme such as OFDM. Accordingly, complex numbers are mapped to the constellation map, enabling a fine granularity of constellation points. This scheme may be used, for example, in the transmission of video where the coefficients representing the higher frequency of each of the video components, as well as the quantization error values of the DC and near DC components, or some, possibly non-linear transformation thereof, are sent as pairs of real and imaginary portions of a complex number that comprises a symbol.06-16-2011
20090086845DEVICE, SYSTEM, AND METHOD OF MULTI-LEVEL FEEDBACK - Device, system, and method of multi-level feedback. For example, an apparatus includes: an estimator to estimate a likelihood of correctly decoding an incoming encoded Hybrid Automatic Repeat Request packet of an incoming wireless communication signal by one or more decoders of the apparatus; and a transmitter to transmit a multiple-bit representation of the likelihood of correctly decoding the incoming encoded Hybrid Automatic Repeat Request to a device that transmitted the incoming encoded Hybrid Automatic Repeat Request packet.04-02-2009
20090097588DIGITAL DATA ENCODING AND DECODING METHOD AND SYSTEM - Digital data encoding and decoding method and system is provided. The method for digital data communication include encoding bit stream having monitoring a specific bit pattern in the bit stream when a frame signal is received, and based on the monitoring, creating a unique encoding pattern for the frame signal in encoded data. The system for digital data communication includes an encoder having a control unit for monitoring incoming bit stream to detect a specific bit pattern at a bit position relative to a frame signal and asserting a control signal, and a mark and space unit for generating encoded data having at least one of one or more marks and one or more spaces, based on the bit stream in response to the control signal so that the frame signal is embedded into the encoded data. The method for decoding includes recovering bit stream from encoded data. The encoded data is generated using a unique encoding pattern for a frame signal in the encoded data. The recovering includes detecting at least one of mark and space. The method includes recovering a frame signal from the encoded data, including detecting a pattern associated with the unique encoding pattern based on the detection of the at least one of mark and space. The system for decoding includes a first recover for recovering bit stream from encoded data. The encoded data is generated using a unique encoding pattern for a frame signal in the encoded data. The first recover includes a circuit for detecting at least one of mark and space. The system includes a second recover for recovering a frame signal from the encoded data. The second recover includes a circuit for detecting a pattern associated with the unique encoding pattern based on the detection of the at least one of mark and space.04-16-2009
20090097589LOWER COMPLEXITY LAYERED MODULATION SIGNAL PROCESSOR - A method and apparatus for transmitting and receiving a coded signal having an upper layer signal and a lower layer signal is disclosed. The method comprises the steps of combining the upper layer signal and the lower layer signal, encoding the combined upper layer signal and lower layer signal, delaying the upper layer signal, modulating the delayed upper layer signal, modulating the lower layer signal, transmitting the delayed upper layer signal and transmitting the lower layer signal. The apparatus comprises an encoder, for encoding a combined upper layer signal and lower layer signal, a delay, communicatively coupled to the encoder, for delaying the upper layer signal, a first modulator, for modulating the delayed upper layer signal, a second modulator, for modulating the lower layer signal, a transmitter, communicatively coupled to the first modulator, for transmitting the delayed upper layer signal, and a second transmitter, communicatively coupled to the second modulator.04-16-2009
20090185637APPARATUS AND CIRCUIT FOR DATA TRANSMISSION - The invention provides a data transmitting apparatus including: a data transmitting circuit (07-23-2009
20110228871High Bandwidth Programmable Transmission Line Pre-Emphasis Method and Circuit - In one embodiment, a transmission line pre-emphasis circuit includes a primary signal path generating a primary differential output current indicative of a digital data stream and a secondary signal path including a pulse shaping stage incorporating a network and a scaling stage. The pre-emphasis circuit generates an overshoot pulse with variable pulse width. In another embodiment, a transmission line pre-emphasis circuit includes a primary signal path generating a primary differential output current indicative of a digital data stream and one or more secondary signal paths incorporating a network implementing a specific transient response. Each of the secondary signal paths includes a scaling stage and a shaping stage each with programmable bias current. The scaling stage can be configured before or after the shaping amplifier. The pre-emphasis circuit generates an overshoot signal with variable amplitude and/or variable width.09-22-2011
20130121436DISTRIBUTING CLOCK ASSOCIATED WITH A WIRED DATA CONNECTION OVER WIRELESS INTERFACES USING FREQUENCY CORRECTION AT THE TRANSMITTER SIDE - A clock extractor extracts clock frequency f05-16-2013
20130121437METHOD AND APPARATUS FOR ACQUIRING A PRECODING MATRIX INDICATOR AND A PRECODING MATRIX - In the field of communication technologies, a method and an apparatus for acquiring a Precoding Matrix Indicator (PMI) and a Precoding Matrix (PM) are provided. The method includes: acquiring a reference PMI and a differential PMI according to a first non-differential codebook and a first diagonal differential codebook, where codewords included in the first diagonal differential codebook form a diagonal matrix. The apparatus includes a PMI acquiring module. Acquiring a reference PMI and a differential PMI according to a non-differential codebook and a diagonal differential codebook can reduce the feedback overhead or improve the feedback precision; and the fact that codewords included in the diagonal differential codebook form a diagonal matrix can maintain amplitude characteristics (for example, a constant modulus characteristic, and a finite character set constraint characteristic) of elements of the non-differential codebook or facilitate power distribution among antennas.05-16-2013
20080292017Modulation of Data Streams With Constellation Subset Mapping - In a method for encoding at least two data streams (p11-27-2008
20090080564Context-sensitive overhead processor - The present invention discloses an overhead processor for data transmission in digital communications. First, incoming data is transmitted along a datapath. If the incoming data forms one group of data, said group of data is transmitted along the datapath, into an elastic store and then is transmitted into one or more flip-flop(s); if there are two or more groups of incoming data, arriving separately, the initial group(s) of received data can optionally be held in an elastic store until the arrival of additional group(s) of data, and upon the arrival of said additional group(s) of data, all of the received data are combined and then transmitted into said flip-flop(s). The data is then transmitted from said flip-flop(s) to a logic element, which uses the received data context to determine the new data context of any imminent incoming data. The logic element transmits this new data context to a second flip-flop, which transmits the new data context values into an elastic store. Said elastic store transmits the new data context back through the first flip-flop(s) and into the logic element, prior to any additional incoming bytes arriving along the datapath. Therefore, the present invention is able to reduce the number of overhead processors required for multi-byte data transmission, potentially reducing the number of required overhead processors in digital communications to 1.03-26-2009
20110222627METHOD AND APPARATUS FOR CODEBOOK EXCHANGE IN A MULTIPLE ACCESS WIRELESS COMMUNICATION SYSTEM - Methods and apparatus are disclosed for generating and exchanging codebooks in a multiple access wireless communication system. The codebooks include a plurality of preferred precoding matrices.09-15-2011
20090161787ONE-WAY BUFFERED COMMUNICATOR - A system and method of one-way buffered communication for reporting emergency or alarm situation where there is little or no time to wait for a telephone connection to be established. The buffered communication apparatus including apparatus for storing sound input and apparatus for establishing a connection between the communication apparatus and a predetermined party. Once the communication apparatus is activated, both sound storage and call establishment is started and the stored data is transmitted once the connection is established.06-25-2009
20090016463METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN MULTIPLE ANTENNA SYSTEM - There is provided a method for transmitting channel state information in a wireless communication system. The method includes receiving a pilot signal, obtaining an estimated channel using the pilot signal, obtaining a plurality of bases representing the estimated channel, wherein a basis comprises a plurality of vectors and transmitting a representative vector as channel state information, wherein the representative vector is selected from the plurality of bases.01-15-2009
20080317163Composite crest factor reduction - Systems and methods are provided for providing a hybrid signal having a reduced crest factor. A digital signal is generated that assumes one of a plurality of vector states at discrete sampling times, with each of the plurality of vector states having an associated phase. An analog signal is monitored to determine when a phase of the analog signal is aligned with the phase of a vector state assumed by the digital signal. A crest factor reduction is applied to the digital signal if the digital signal assumes a vector state having an associated phase aligned with the phase of the analog signal to provide a compressed digital signal. The compressed digital signal and the analog signal are combined to provide the hybrid signal. The analog signal is not altered prior to being combined with the compressed digital signal.12-25-2008
20080317160CODE-MODULATED PATH-SHARING MULTI-SIGNAL SYSTEMS - Described herein are code-modulated multi-signal systems. In one embodiment, a multi-signal system receives multiple input signals and code-modulates each input signal with a unique code to distinguish the input signal from the other input signals. The input signals may come from multiple antennas, multiple sensors, multiple channels, etc. The code-modulated signals are then combined into a combined signal that is sent through shared blocks and/or transmitted across a shared medium in a shared path. After shared processing and/or shared transmission, the individual signals are recovered using matched filters. Each matched filter contains a code corresponding to one of the unique codes for recovering the corresponding signal from the combined signal. The recovered signals may then be inputted to additional processors for further processing.12-25-2008
20110228874DIGITAL SIGNAL PROCESSOR, COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND METHOD FOR OPERATING A DIGITAL SIGNAL PROCESSOR - The present invention provides a digital signal processor, a communication system comprising such a digital signal processor and a method for operating such a digital signal processor. The digital signal processor for a communication system in an aircraft cabin of an aircraft comprises a provision means for providing a pre-determinable digital signal suitable for forming a respective wave form for mapping a respective pre-determined service signal and a pre-determined noise signal.09-22-2011
20110228873APPARATUS FOR TRANSMITTING DIGITAL BROADCAST AND METHOD FOR TRANSMITTING DATA USING THE SAME IN DIGITAL BROADCASTING SYSTEM - An apparatus for transmitting digital broadcasts includes: a main service data generation unit configured to generate main service data; an additional data generation unit configured to generate plural pieces of additional data; a spreading unit configured to spread the plural pieces of additional data using different spreading sequences, respectively; and a transmission unit configured to couple each of the plural pieces of spread additional data with the main service data and transmit the coupled data.09-22-2011
20110142164METHOD AND DEVICE FOR REALIZING GROUPING IN MULTI-INPUT MULTI-OUTPUT TRANSMISSION WITH MULTIPLE-SECTOR COORDINATION - A method and device for performing Multi-Input Multi-Output transmission to a mobile terminal in the base station devices of a wireless communication system is provided. Each base station device determines the sector coordination group used at a certain frequency band according to system settings. Each base station device only performs multiple-sector (-cell) collaborative MIMO transmission in the sector coordination group which includes the sectors governed by the base station device. A simple and effective method is provided for realizing the multiple-sector (-cell) MIMO technology, its advantages including but not limited to there being a reduced amount of information exchanged between sectors (cells), which facilitates implementation and management, and good performance in controlling interface between sectors (cells).06-16-2011
20090220026DIGITAL BROADCAST TRANSMITTER/RECEIVER HAVING IMPROVED RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitter/receiver, and a signal processing method thereof, includes a randomizer randomizing a dual transport stream which includes a normal data packet and a robust data packet and into which stuff bytes are inserted, a stuff-byte exchanger replacing the stuff bytes of the randomized data with known data, a first RS encoder performing RS-encoding of data output from the stuff-byte exchanger, a packet formatter performing an interleaving of the robust packet of the data output from the first RS encoder and reformatting the packet, an interleaver interleaving data output from the packet formatter, a trellis encoder performing a trellis encoding of interleaved data, a second RS encoder changing a parity by performing an RS encoding of the robust data of the trellis-encoded data, and a modulator modulating data output from the trellis encoder and RF up-converting the modulated data.09-03-2009
20090245414Transmitter - A transmitter, which may suppress peak power in a transmission signal, effectively suppresses peak power occurring in a transmission signal. In a transmitter that may suppress peak power in a transmission signal, a plurality of peak-suppression-signal generating means generate peak suppression signals for suppressing the peak power in the transmission signal respectively, peak-suppression-signal synthesizing means synthesizes peak suppression signals generated by the plurality of peak-suppression-signal generating means, and subtraction means subtracts a signal as a synthesis result given by the peak-suppression-signal synthesizing means from the transmission signal.10-01-2009
20090245413RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - A radio transmitting apparatus and a radio transmitting method wherein a guard interval having a variable length is used to allow a radio receiving apparatus to precisely and easily obtain a symbol synchronization. In the radio transmitting apparatus, a GI adding part (10-01-2009
20080260065METHOD AND SYSTEM FOR MODULATING AND DEMODULATING SIGNALS IN ULTRA-WIDE BAND (UWB) COMMUNICATION SYSTEMS - A communication system is disclosed and it may include one or more first circuits in a first passband single carrier transmitter coupled to a first ultra-wide-band wireless transmission channel. The communication system may also include one or more second circuits in a first receiver coupled to the first ultra-wide-band wireless transmission channel. The one or more second circuits may enable receiving of signals transmitted by the one or more first circuits over the first ultra-wide-band wireless transmission channel at a baud rate less than or equal to half of a spectral bandwidth of the signal transmitted by the one or more first circuits. The one or more first circuits and the one or more second circuits coupled to the first ultra-wide-band wireless transmission channel may be a first piconet.10-23-2008
20100166105Transmitter and the Method Therefor - A transmitter and the method therefor are provided. The transmitter is applied in an orthogonal frequency division multiplexing (OFDM) based or other multicarrier communication systems. The transmitter uses N sub-carriers. Among the N sub-carriers, L sub-carriers (or tones) are reserved for PAPR reduction. L is less than N. The method includes the following steps. Original frequency domain data symbols are generated and fed into the reserved-tone symbol generation unit. The reserved-tone symbols are generated by using pure frequency domain signal processing. Then the reserved-tone symbols are combined with original data symbols to generate combined PAPR reduction signal. The resultant PAPR reduction signal can be fed into reserved-tone symbol generation unit iteratively to obtain updated reserved-tone symbols. For proper iterations, the original data symbols combined with L frequency domain reserved-tone symbols will result in lower PAPR transmit signal.07-01-2010
20090316825Radio Transmitter Apparatus, Radio Receiver Apparatus, and Wireless Communication System - A wireless communication system capable of obtaining diversity gain without fail even when the distribution of the reception qualities is large. In a radio transmitter apparatus (12-24-2009
20090316823METHODS AND SYSTEMS FOR IMPROVING FRAME DECODING PERFORMANCE USING KNOWN INFORMATION - A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of a response message expected to be transmitted in response to a previously transmitted message. Example expected response messages include clear to send (CTS) messages transmitted in response to request to send (RTS) messages and positive acknowledgement (ACK) messages transmitted in response to messages with data payloads.12-24-2009
20090252254TRANSMITTER AND RECEIVER FOR FREQUENCY DOMAIN EQUALIZATION - A transmitter and/or receiver for performing frequency domain equalization is provided. A transmitter includes a pilot position determination unit for determining positions for inserting pilots in a frequency domain based on frequency spectrums of data, and a pilot insertion unit for inserting the pilots between the frequency spectrums of the data according to the determined positions for inserting the pilots.10-08-2009
20090262860CURRENT INTERFACE WITH A BLOCKING CAPACITOR ATTACHED TO AN ADDITIONAL PIN - It is described a current interface (10-22-2009
20090257523PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS - In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence.10-15-2009
20090257524Multi-Tone Transmission - A Multi-tone transmission system processes input data through a plurality of intermediate processing stages 10-15-2009
20120195391Physical Layer Frame Format for Long Range WLAN - In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first preamble portion and a data portion of the data unit is generated. The first preamble portion includes one or more long training fields. The first preamble portion and the data portion are modulated using a plurality of orthogonal frequency division multiplexing (OFDM) symbols. Symbol duration of each OFDM symbol is at least 8 μs. The data unit is generated to include the plurality of OFDM symbols.08-02-2012
20120140841BROADCAST CONTROLLING APPARATUS AND METHOD FOR CHANGING TRANSMISSION FREQUENCY IN DIGITAL BROADCASTING - Provided is a broadcast controlling apparatus and method for changing a TX frequency in digital broadcasting. The broadcast controlling apparatus includes a broadcast controlling unit and a first broadcast signal transmitting unit. The broadcast controlling unit is configured to divide a data rate of an RF channel, while changing a TX frequency of a second RF channel, and allocate a first program provided through the RF channel and a second program provided through the second RF channel. The first broadcast signal transmitting unit is configured to process the first and second programs through the RF channel under the control of the broadcast controlling unit and digital-broadcast the resulting programs.06-07-2012
20110228878Methods and Arrangements for Peak to Average Power Ratio Reduction - The present invention relates to a transmitter and to a receiver and methods thereof wherein the PAPR is reduced by applying a set of different phase rotations to the output of each DFT of the transmitter. A corresponding set of inverse phase rotations are applied to the input of the IDFT of the receiver. The set of phase rotations applied to the subcarriers at the output of the DFT precoder of the transmitter results in a circular time shift of the corresponding time domain at the output of the IDFT modulator. If the phase rotations are properly selected for each DFT precoder, the probability that signal peaks sum in a constructive way at the output of the IDFT modulators is reduced, with a consequent reduction of the PAPR.09-22-2011
20090122906METHOD AND APPARATUS FOR ENCODING A MODULATED SIGNAL IN A COMMUNICATION SYSTEM - Disclosed is a method and apparatus for encoding a modulated signal in a communication system. The method comprises generating an initial constellation, applying a vertical axis symmetry to the initial constellation to generate a first resulting constellation, translating the first resulting constellation to a left direction of the initial constellation to produce a left flipped constellation, applying a horizontal axis symmetry to the initial constellation to generate a second resulting constellation, translating the second resulting constellation to an up direction of the initial constellation to produce an up flipped constellation, applying a central axis symmetry to the initial constellation to generate a third resulting constellation; and translating the third resulting constellation to a left-up direction of the initial constellation to produce a left-up flipped constellation.05-14-2009
20090316822METHOD OF TRANSMITTING SIGNALS FOR MULTIPLE ANTENNA SYSTEM - A signal transmission method for use in a multi-antenna system includes: receiving a complex signal using N antennas and M timeslots as a single unit, and generating a space-time code (STC) for performing interleaving and phase-shifting operations of the received complex signal; and applying the space-time code (STC) to the received complex signal, and transmitting the resultant signal. Therefore, the signal transmission method provides a space-time code (STC) provides a space-time code (STC) having higher performance and lower encoding complexity, and can effectively transmit the signal via the multi-antenna system.12-24-2009
20080317162SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - A system and method for transmitting/receiving data in a communication system is provided. A transmitter is allocated resources using a circuit mode scheme, determines if there is actual data to be transmitted to a receiver, and transmits information representing that there is no actual data to be transmitted using the allocated resources when it is determined that there is no actual data to be transmitted.12-25-2008
20090086846CHANNEL ARCHITECTURE WITH MULTIPLE SIGNAL PROCESSING BRANCHES FOR A GIVEN PHYSICAL CHANNEL - A communication system includes a physical communication channel. A signal is transmitted across the communication channel from a transmit end of the channel to a receive end of the channel. A plurality of processing branches process the signal at the receive end of the communication channel. This reduces complexity of the receive channel, without reducing a bandwidth of the given communication channel, and without comprising performance.04-02-2009
20100172433ENCODING METHOD AND APPARATUS - An encoding method and apparatus are provided. In the encoding method: encoding input information bits with an encoding matrix G and a linear combination formula. The encoding matrix G is an encoding matrix obtained by performing row permutation on an encoding matrix H having a plurality of successive zeroes in one or more columns of the encoding matrix H. Encoding control information with the encoding matrix provided by aspects of the present disclosure, each bit of the control information is distributed on all encoded output bits as uniformly as possible. Thereby, the bits of the control information obtain sufficient frequency diversity and time diversity after channel mapping, so as to improve transmission performance of the control information effectively.07-08-2010
20090116580DIGITAL BROADCASTING TRANSMISSION CAPABLE OF IMPROVING RECEIVNG AND EQUALIZING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitting system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a transport stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the transport stream into which stuff bytes are inserted, an encoder to encode the transport stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded transport stream, RF-convert the modulated transport stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization.05-07-2009
20110129031METHOD, APPARATUS AND PROCUCT OF OFDM TRANSMISSION - Methods for transmission and detection, as well as a transmitter and a receiver for performing the methods are disclosed. An example transmission method according to an aspect of the invention includes determining of a modulation vector for an information symbol vector and modulating subcarriers with elements of the modulation vector. Example resulting out-of-band signal power emission improvements over prior art are demonstrated.06-02-2011
20090116579INTERPROCESSOR COMMUNICATION LINK FOR A LOAD CONTROL SYSTEM - The present invention provides a reliable communication protocol that provides multicasting of digital messages on an interprocessor link coupling together a plurality of processors of a load control system. Preferably, the load control system includes a plurality of sub-systems, with a number of the processors in each sub-system. The processors are each characterized by a unique individual address, while all of the processors of a single sub-system are characterized by an identical multicast address. The processors re-transmit digital messages on the communication link if a target address of the digital message is equal to the multicast address. The processors determine if acknowledgement messages are received from each of the processors from which acknowledgement messages were expected during a predetermined amount of time after transmitting an initial digital message, and transmit a retry message in response to determining that the acknowledgement messages were not received.05-07-2009
20090046804NETWORK DEVICE AND TRANSMISSION METHOD THEREOF - A network device and a transmission method thereof are disclosed. The network device consists of a first network device and a second network device. According to at least one command, the first network device generates serial command, inserts the serial command into gaps between packet data and transmits the serial command to the second network device while outputting those packet data to the second network device. In accordance with the serial command received, the second network device saves data in a register of the second network device. Therefore, the transmission circuit is simplified, heat dissipation efficiency is improved and accuracy of signal transmission is ensured. Moreover, data in the register is retrieved precisely.02-19-2009
20100189191TRANSMITTER AND TRANSMISSION METHOD - A transmitter includes multiple transmit antennas, a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any of the transmit antennas, a precoding unit configured to weight the signal sequences with a precoding matrix selected from a codebook including multiple predefined precoding matrices, and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmit antennas and transmit the converted signals from the transmit antennas. The precoding unit applies distinct precoding matrices to different signal sequences, and an association between the distinct precoding matrices and the different signal sequences is determined through open-loop control being independent of a feedback from a receiver.07-29-2010
20100290559RADIO TRANSMITTING DEVICE AND RADIO TRANSMITTING METHOD - A radio transmitting device and method enables reduction of an increase of CGI memories for the control channel and an improvement of the throughput of the data channel. When multiplex transmission through the control channel and the data channel is carried out and when adaptive modulation is applied to both channels, an MCS selecting section (11-18-2010
20100177845MULTI-ANTENNA TRANSMISSION DEVICE AND MULTI-ANTENNA TRANSMISSION METHOD - Provided is a multi-antenna transmission device which can improve the reception quality when performing a repeated detection using a software value at the reception device side in a spatial multiplex MIMO system. A transmission device (07-15-2010
20100177846RFIC with on-chip acoustic transducer circuit - An RFIC includes a transmit acoustic transducer, a digital conversion module, a transmit baseband module, an analog conversion module, an up-conversion module, a power amplifier circuit, a low noise amplifier circuit, a down-conversion module, a receive baseband processing module, and a receive acoustic transducer circuit. The transmit acoustic transducer circuit converts transmit sound waves into transmit electrical signals. The digital conversion module converts the transmit electrical signals into digital transmit audio signals and converts down-converted signals into digital receive baseband or low IF signals. The transmit baseband processing module converts the digital transmit audio signals into digital transmit baseband or low IF signals. The analog conversion module converts the digital transmit baseband or low IF signals into analog transmit baseband or low IF signals and converts digital receive audio signals into receive electrical signals. The up-conversion module converts the analog transmit baseband or low IF signals into up-converted signals. The power amplifier circuit amplifies the up-converted signals. The low noise amplifier circuit amplifies receive RF signals. The down-conversion module converts the amplified receive RF signals into the down-converted signals. The receive baseband processing module converts the digital receive baseband or low IF signals into the digital receive audio signals. The receive acoustic transducer circuit converts the receive electrical signals into receive sound waves.07-15-2010
20100177841Power and Area Efficient SerDes Transmitter - A system and method include a SerDes transmitter comprising a digital block operating in a digital voltage domain. The digital block can be configured to receive a first group of bits of data in parallel and store history bits from another group of data. The SerDes transmitter can further comprise an analog block operating in an analog voltage domain. The analog block can be configured to receive the first group of bits of data from the digital block, receive the history bits from the digital block, generate a plurality of combinations of bits with one or more bits from the first group of bits and zero or more bits from the history bits, align each combination of bits to a phase of a multi-phase clock; and input each combination into an output driver.07-15-2010
20100177844METHOD OF TRANSMITTING CONTROL INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting control information in a multiple antenna system includes generating a dedicated pilot including a weight and a weight index indicating the weight, and transmitting the dedicated pilot. Detection performance can be improved when control information such as a weight and a weight index is transmitted on a pilot.07-15-2010
20100177842CODEWORD GENERATION METHOD AND DATA TRANSMISSION METHOD USING THE SAME - A data transmission method includes encoding information bits to generate a codeword including a plurality of data symbols, the sum of the plurality of data symbols of the codeword being equal to zero, multiplexing a data symbol and a pilot with a subcarrier and transmitting multiplexed data symbol and pilot through the subcarrier. Since a data symbol and a pilot are multiplexed together to a subcarrier, channel estimation performance can be improved.07-15-2010
20100177840OPPORTUNISTIC RADIO FREQUENCY COMMUNICATIONS - Systems and methods for opportunistic radio frequency communications are provided which include the use of multiple antennas. Signal data from the antennas can be used to determine directions of incoming signals. Signal power in the direction of strongest signals can then be reduced by adjusting relative gains and phases of received signals. Reducing signal power of strong signals reduces the dynamic range of received signals and facilitates discovery of unused communication frequencies. Any unused frequencies can then be used or allocated as desired.07-15-2010
20100177843METHOD FOR TRANSMITTING SIGNALS FOR ACHIEVING DIVERSITY GAIN - A method for transmitting signals for achieving diversity gain is provided. In a communication system having multiple independent transmission paths, a signal is transmitted by mapping it to different independent transmission paths at initial transmission and at retransmission, thereby obtaining diversity gain. Especially, real and ideal components of a transmission signal are mapped to different transmission paths, thereby obtaining additional gain.07-15-2010
20130215992RECEIVER ADAPTATION BASED ON ACQUIRED PRECODER KNOWLEDGE - A user equipment, UE, (08-22-2013
20130215993SYSTEMS AND METHODS FOR DETECTING TRANSMISSIONS BASED ON 32-POINT AND 64-POINT FAST FOURIER TRANSFORMS - Systems, methods, and devices for communicating and detecting training sequences are described herein. In one aspect, a method of wireless communication is provided. The method comprises receiving one or more short training field (STF) sequences comprising sixty-four values or less. The STF sequences comprise zero and non-zero values. The non-zero values are located at one or more indices of the STF that are separated by a multiple of at least four. The method further comprises determining a first correlation between the STF and the STF shifted by a first shift length. The method further comprises determining a second correlation between the STF and the STF shifted by a second shift length. The method further comprises determining a fast Fourier transform (FFT) size based on the first correlation and the second correlation. The method further comprises decoding one or more data symbols based at least in part on the determined FFT size.08-22-2013
20130215995Apparatus and method for amplifying a signal from a transmitter - The subject matter discloses a method of amplifying a signal, the method comprising receiving a command to start transmission, gradually increasing a value of an enable signal used to amplify the transmission and intermittently transmitting the value of the enable signal to an enable transistor used to allow amplifying a transmitted signal.08-22-2013
20130215996METHOD AND DEVICE FOR CODED MODULATION - A method for optimising a coded modulation scheme with a given spectral efficiency for communication over a fading channel represented/identified by B fading gains, wherein B is an integer number expressing the ratio between a code word duration and the duration over which the fading remains constant. The fading gains belong to a B-dimensional space of fading gains.08-22-2013
20100226457COMMUNICATION SYSTEM, TRANSMITTER AND RECEIVER - A communication system comprises a transmitter configured to binary data and a receiver configured to the data transmitted from the transmitter. The transmitter counts the number of bits of any one of binary value of a data section of the transmission data, and determines whether or not inversion processing should be performed in accordance with the counted number. When performing the inversion processing, the transmitter reverses each bit of the data section of the transmission data, adds inversion information showing that the bits have been reversed, and transmits the transmission data. The receiver receives the transmission data and determines whether or not inversion processing should be performed for the reception data, on the basis of the inversion information of the reception data. When performing the inversion processing, the receiver reverses each bit of the data section of the reception data.09-09-2010
20100254485PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, AND MIMO RECEPTION DEVICE - It is possible to provide a novel pilot transmission method which can calculate an accurate channel estimation value, a MIMO transmission device using the pilot transmission method, and a MIMO reception device which communicates with the MIMO transmission device. The MIMO transmission device (10-07-2010
20100254484WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMISSION DEVICE, WIRELESS COMMUNICATION METHOD, AND PROGRAM - A wireless transmission device converts signals having been subjected to a first modulation into frequency domain signals, and allocates the frequency domain signals converted to subcarriers for transmission. The wireless transmission device includes: a controller that selects, based on channel qualities of the subcarriers to which the frequency domain signals are allocated, a value satisfying a predetermined communication quality as control information indicative of the number of frequency domain signals included in each of segments into which the frequency domain signals are segmentalized; and an allocating unit that segmentalizes the frequency domain signals into segments, each of the segments including the same number of frequency domain signals as the value selected as the control information by the controller, and allocates the frequency domain signals included in each of the segments to sequential subcarriers.10-07-2010
20110058625TRANSMITTING APPARATUS WITH BIT ARRANGEMENT METHOD - A method of transmitting data by transmitting apparatus, that includes controlling generation of bit sequences to adjust an occupation rate of systematic bits in a first data block including systematic bits and parity bits, which is obtained by encoding first data in a first encoding process, and is equal or closer to an occupation rate of systematic bits in a second data block including systematic bits and parity bits, which is obtained by encoding second data in a second encoding process, and to adjust an occupation rate of parity bits in the first data block that is closer to an occupation rate of parity bits in the second data block, in regard to first bit positions of the bit sequences generated using bits included in the first and second data blocks and performs multi-level modulation for transmission based on the generated bit sequences.03-10-2011
20110058624IMPROVED INTERLEAVER AND DEVICE FOR SELECTING SERVICES, FOR A RADIOCOMMUNICATION NETWORK WITH LONG TIME INTERLEAVING AT THE LEVEL OF THE PHYSICAL LAYER - An interleaver (ER) is dedicated to interleaving of interleaving units representing a selected number of services grouped into periodic frames within a long period time interleaving radio communication network. The said interleaver (ER) comprises processing means (MT03-10-2011
20110058623SYSTEM AND METHOD FOR GENERATING A DEFINED PULSE - Apparatus for generating a first signal (e.g., a pulse) including a current source adapted to generate a current based on a second signal that defines an amplitude of the current and a third signal that defines the timing of an amplitude change of the current, and an impedance element through which the current flows to generate the first signal. The impedance element may comprise a resonator having a resonant frequency approximate the center of the first signal frequency spectrum. An LO may be used to generate the third signal to control the timing of the amplitude change of the current. A detector may enable the current source in response to detecting a defined steady-state condition of the LO clock signal, and may disable the current source in response to the completion of the first signal. A controller may generate the second signal to control the current amplitude so as to perform power control and/or other functions.03-10-2011
20100239046Method of Transmitting Data Using Repetition Coding - A method of transmitting data in a wireless communication system is provided. The method includes generating duplicate data by using repetition coding, the duplicate data being the same as original data, shifting the phase of the duplicate data, and transmitting the original data and the phase-shifted duplicate data. The duplicate data is mapped to a modulation symbol having a different size or phase as that of the original data, thus to reduce the PAPR unlike the general repetition coding.09-23-2010
20100239045PREAMBLE COMPOSING METHOD - A preamble design method of generating a preamble for a plurality of symbols using time waveform data of a specific symbol in an OFDM communication system includes dividing the time waveform data of the specific symbol into a plurality of blocks equivalent to a number of symbols in the preamble, selecting a separate block from among divided blocks in units of symbols in the preamble, and generating time waveform data having a different pattern for each of the symbols by generating time waveform data for a single symbol in which a selected block is set as a leading block and data are cyclically arranged from leading data in the selected block.09-23-2010
20100232545METHOD OF PROCESSING TRAFFIC INFORMATION AND DIGITAL BROADCAST SYSTEM - A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.09-16-2010
20100142642METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM - A method for transmitting feedback information in a Multiple-Input Multiple-Output (MIMO) system is provided. The method constructs and transmits CQI (Channel Quality Information) channel including at least one CQI for uplink control information, wherein additional feedback information is included in at least one punctured bit among a plurality of bits allocated for the CQI channel.06-10-2010
20100254486METHOD OF BLOCK-CODED GROUP MODULATION AND TRANSMITTER USING THE SAME - A transmitter using a method of block code-based group modulation includes a grouping unit, a generating unit, and a mapping unit. The grouping unit generates symbols by grouping a data bit stream into N-bit groups, and the generating unit generates a codeword set composed of codewords corresponding to combinations of arrangements of pulses that are generated by a result of grouping to a predetermined number. Next, the mapping unit block-maps a codeword selected from the codeword set to groups constituting the symbols.10-07-2010
20100254483METHOD OF TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting control signals in a wireless communication system includes transmitting a first control signal via a control channel region comprising a plurality of tiles composed of a plurality of subcarriers contiguous in a frequency domain on a plurality of OFDM symbols in a time domain, and transmitting a second control signal via the control channel region, wherein the plurality of tiles included in the control channel region are distributedly or contiguously disposed within a basic range of the control channel region, a range within which the plurality of tiles are distributed in the time domain. Control channel regions can be configured in various manners, so control signals can be adaptively transmitted in various channel environments.10-07-2010
20100254480METHOD OF TRANSMITTING A DATA BLOCK IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting a data block in a wireless communication system is disclosed. A method of transmitting a data block in a user equipment of a wireless communication system comprises receiving upper layer data through at least one upper layer channel, generating a data block including at least a part of the upper layer data, at least one channel indicator indicating each of the at least one upper layer channel, and information associated with quality of a service provided through the at least one upper layer channel established in the user equipment, and transferring the generated data block to a lower layer.10-07-2010
20100254481DATA TRANSMISSION DEVICE AND DATA TRANSMISSION METHOD - A data transmission device comprises a data sending device that includes an electromagnetic signal sending unit. The data sending device is configured to output binary data in such a polarity that an electromagnetic signal, which is output from the electromagnetic signal sending unit, is substantially point symmetric with a point, at which amplitude of the electromagnetic signal crosses 0, as a symmetric point. Binary data is output corresponding to whether a gradient at the symmetric point is positive or negative.10-07-2010
20100254479METHOD FOR DETERMINING A MODULATION AND CODING SCHEME - A method for determining a modulation and coding scheme comprises the steps of: transmitting signals with different modulation and coding schemes and adjusting weighting of each modulation and coding scheme based on the quality of transmitted signals on a receiving end; adjusting the weighting of each modulation and coding scheme based on suggested modulation and coding schemes; determining a modulation and coding scheme to use according to the weighting of each modulation and coding scheme.10-07-2010
20100135429TRANSMITTING APPARATUS, POWER SUPPLY SWITCHING METHOD FOR TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND POWER FEEDING METHOD FOR RECEIVING APPARATUS - To simplify a power circuit of a transmitting apparatus (source equipment) connected to a receiving apparatus (sink equipment).06-03-2010
20100128815Receiving Apparatus and Transmitting Apparatus - A partial bit demodulation section that demodulates partial bits among a plurality of bits that form 1 symbol of each modulated signal using a detection method different from likelihood detection, signal point reduction sections that reduce the number of candidate signal points using demodulated partial bits, and a likelihood detection section obtains received digital signals by performing likelihood detection based on the Euclidian distances between the reduced candidate signal points and a reception point, are provided. By this, only some bits which are unlikely to be erroneous are found by the partial bit demodulation section, and other bits can be found by the likelihood detection section, enabling bit error rate performances to be effectively improved with a comparatively small computational complexity.05-27-2010
20120140846METHOD FOR TRANSMITTING SIGNALS IN A DIGITAL COMMUNICATION SYSTEM AND TRANSMITTER FOR A DIGITAL COMMUNICATION SYSTEM - A method is provided which improves reliability of channel estimation in a digital communication system by reducing the ambiguity in the recognition of received symbols evaluated for the channel estimation. A first plurality of bits is mapped to a modulation state according to a given Gray mapping of binary numbers to modulation states and transmitted. The plurality of bits is re-transmitted at least once, with a sub-set of bits contained in the plurality of bits inverted, and mapped to further modulation states according to the same Gray mapping. The bits to be inverted are determined in a way that the number of different vector sum results obtainable, for all combinations of bit values within the first plurality of bits, by adding vectors representing complex values of the first and further modulation states in a complex plane, is lower than the number of different modulation states within the Gray mapping.06-07-2012
20120140840DATA PATH UTILIZATION FOR LOW LEVEL PATTERN GENERATION AND CHECKIING - Decision modules are strategically located along with various modules to route signals from either a test pattern generator or the data link layer through the various modules for performing scrambling, encoding, and serializing procedures on the signals before transmission of the signals on a serial bus. Decision modules are strategically placed along with various modules to route signals to either a test pattern checker or the data link layer through the various modules for performing descrambling, decoding, and deserializing procedures on the signals after receiving the signals from a serial bus.06-07-2012
20120140845METHOD AND APPARATUS FOR COMBINING SPACE-FREQUENCY BLOCK CODING SPATIAL MULTIPLEXING AND BEAMFORMING IN A MIMO-OFDM SYSTEM - A method and apparatus for combining space-frequency block coding (SFBC) and frequency shift transmit diversity (FSTD) in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system.06-07-2012
20120140843METHOD AND APPARATUS FOR TRANSMISSION WITHIN A MULTI-CARRIER COMMUNCATION SYSTEM - Multiple transmit antenna transmission together with preferably pseudo-random, antenna-specific, scrambling (PRAS) is utilized to scramble incoming data differently on different antennas for those users requiring frequency diversity type transmissions. When PRAS is activated for a particular allocation, each transmit antenna applies a different scrambling sequence to the data symbols that are transmitted in the allocation.06-07-2012
20090279638COMMUNICATION NETWORK SYSTEM, AND TRANSMISSION/RECEPTION APPARATUS, METHOD AND INTEGRATED CIRCUIT FOR USE THEREIN - A communication network system sets communication parameters which enable an operation under a maximum possible communication rate in a situation where a transmission path has cyclic noise/impedance fluctuations. A transmission/reception apparatus 11-12-2009
20100195763APPARATUS, SYSTEM, AND METHOD FOR CREATING ONE OR MORE SLOW-SPEED COMMUNICATIONS CHANNELS UTILIZING A REAL-TIME COMMUNICATION CHANNEL - An intelligent electronic device creates one or more virtual communications channels using unused or dedicated bits from a primary real-time communications channel. The virtual communications channels are used to transport low-speed information, such as executable commands, or automatic functions not requiring high bandwidth.08-05-2010
20090274243PEAK TO AVERAGE POWER RATIO REDUCTION - A method for transmitting data in a communication system employing an encoding scheme includes processing data in accordance with a particular processing scheme to provide a plurality of information symbols; shaping a constellation of the plurality of information symbols to obtain a plurality of shaped symbols; processing the plurality of shaped symbols in accordance with the encoding scheme to obtain a plurality of transformed signals such that the peak to average power ratio (PAR) of the plurality of transformed symbols is lower than the PAR would be if the information symbols were not shaped into shaped symbols prior to processing into transformed symbols, wherein the encoding scheme may be expressed in a form x=Gs, sεZ11-05-2009
20100195760DIGITAL SIGNAL TRANSMITTER SYNCHRONIZATION SYSTEM - Methods, and apparatus for carrying out the methods, are disclosed for synchronizing a plurality of RF transmitters that are supplied with a common digital information signal for carrier modulation and subsequent transmission on a common channel throughout a prescribed region, whereby the digital signal receivers within the region may receive transmissions on the channel from more than one transmitter. The method involves inserting reference signals into the data sent to the transmitters in order to place them into known states at specific times relative to the digital signals sent to them for transmission. As a result of this method, the digital signals transmitted by each of the transmitters will be identical to one another so that the receivers will be able to identify one received signal as the main signal and the others as echoes. If necessary, the signal transmitted by at least one of the synchronized transmitters may be delayed, such that identical digital signals received from at least two of the transmitters by receivers in the region will arrive at each receiver within a prescribed time window. The methods and apparatus also can be applied to one or a plurality of RF transmitters for purposes of synchronizing processes at the source of the signals and at the transmitters.08-05-2010
20090074103RATE MATCHING TO MAINTAIN CODE BLOCK RESOURCE ELEMENT BOUNDARIES - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with multiple transmit antennas and includes an encoding unit configured to segment input bits into one or more code blocks. The transmitter also includes a rate matching unit configured to generate a stream of transmit bits from the one or more code blocks, wherein a group of transmit bits allocated to one resource element originates from only one of the one or more code blocks. The transmitter further includes a mapping unit configured to provide modulated symbols from the stream of transmit bits on a number of spatial transmission layers for one or more resource elements. The transmitter still further includes a transmit unit configured to transmit the modulated symbols employing the multiple transmit antennas.03-19-2009
20090323854Flexible, Reconfigurable, Power Efficient Transmitter and Method - A flexible, reconfigurable, power efficient transmitter device and method is provided. In one embodiment, the method includes receiving outbound data and determining a mode of operation. When operating in a first mode the method may include modulation mapping the outbound data according a modulation scheme to provide first modulation mapped digital data, converting the first modulation mapped digital data to an analog signal that comprises an intermediate frequency (IF) analog signal, upconverting the IF analog signal to produce a first modulated radio frequency (RF) signal based on a local oscillator signal, amplifying the first RF modulated signal to produce a first RF output signal, and outputting the first RF output signal via an isolator. In a second mode of operation method may include modulation mapping the outbound data according a modulation scheme to provide second modulation mapped digital data, converting the second modulation mapped digital data to a first digital baseband signal, conditioning the first digital baseband signal to provide a first analog baseband signal, modulating one or more carriers with the first analog baseband signal to produce a second modulated RF signal based on a local oscillator signal, amplifying the second RF modulated signal to produce a second RF output signal, and outputting the second RF output signal via the isolator. The digital baseband signal may comprise an in-phase (I) digital baseband signal and a quadrature (Q) baseband signal.12-31-2009
20110033009System and Method for Adapting a Change in Constellation Density While Receiving a Signal - One embodiment comprises a transmitter precoder operating on an input signal to produce an output signal for modulation. The output signal is transmitted using a constellation with a constellation density. The transmitter precoder comprises scaler logic, precoder logic and selection logic. The scaler logic scales the input signal to maintain constant power on the input signal independent of the constellation density. The precoder logic precodes the scaled signal to produce a dither signal limited to a range of values. The range is inversely proportional to the constellation density. The selection logic is operable in two states. In the first state, the selection logic combines the scaled signal with the dither signal to produce the output signal. In the second state, the selection provides the scaled signal as the output signal.02-10-2011
20110033008METHOD FOR TRANSMITTING FEEDBACK INFORMATION VIA A SPATIAL RANK INDEX (SRI) CHANNEL - A method for transmitting feedback information via a Spatial Rank Index (SRI) channel includes determining, at an access terminal, a value of a spatial rank index and transmitting, from the access terminal through the SRI channel, feedback information indicating the determined value of the spatial rank index according to a prescribed coding. The codeword of the prescribed coding is one of: (0,0,0,0,0,0,0,0), (1,0,1,0,1,1,0,1), (0,1,1,1,0,0,1,1), or (1,1,0,1,1,1,1,0).02-10-2011
20090168919PULSE MODULATION CIRCUIT AND PULSE MODULATION METHOD - Provided is a pulse modulation circuit capable of generating a pulse modulation signal with a steep rise and a desired pulse width at a desired timing not depending on a transmission signal sequence. In this circuit, a control signal generation unit (07-02-2009
20090110110Transmission Apparatus, Transmission Method, Communication Apparatus, and Program - A transmission apparatus includes a memory adapted to store data to be transmitted, a transmission unit adapted to transmit, via a network, the data to be transmitted to a destination apparatus connected to the network, and a first rate controller adapted to control a first rate such that when the data to be transmitted having a size greater than the capacity of a transmission buffer of the transmission unit is transferred from the memory to the transmission buffer, the first rate at which the data is transferred from the memory to the transmission buffer is controlled to restrict the amount of data to be transmitted stored in the transmission buffer.04-30-2009
20090110109Apparatus and method for generating a transmit signal and apparatus and method for extracting an original message from a received signal - A method for extracting an original message from a received signal including data bits representing the original message or an inverted version thereof, an indicator indicating whether the data bits represent the original message or the inverted version thereof, and a check information which depends on the data bits and the indicator, the method including determining a check information based on the received data bits and the received indicator, comparing the determined check information with the received check information and extracting the original message based on the result of the comparison.04-30-2009
20090110107SYSTEM AND METHOD FOR WIRELESS SIGNAL COMMUNICATION IN AN OIL FIELD ENVIRONMENT - A method is disclosed for transmitting data in a wireless oil field environment, the method comprising sensing a signal change rate for an input signal from an oil field apparatus; selecting a real time transmission mode when the signal change rate is less than a predetermined value; selecting a buffered data transmission mode when the signal change rate is greater than or equal to the predetermined value; and transmitting the data in the selected transmission mode from a wireless oil field environment. A system is disclosed for performing the method.04-30-2009
20080310543Modulator with Instantaneous Modulation Scheme Switching in Multi-Time Slot and Multi-Mode Operation, for a Wireless Communication Equipment - A modulator (M) which may be installed in a wireless communication equipment, comprises i) a modulation means (SPC, M12-18-2008
20080279304DATA TRANSMITTING DEVICE, DATA TRANSMITTING METHOD, DATA TRANSMITTING AND RECEIVING SYSTEM, DATA TRANSMITTING COMPUTER PROGRAM AND STROAGE MEDIUM THEREFOR, DATA RECEIVING DEVICE, DATA RECEIVING METHOD, AND DATA RECEIVING COMPUTER PROGRAM AND STORAGE MEDIUM THEREFOR - A plurality of connection frames are transmitted which differ from each other in at least either modulation scheme or transfer rate. Accordingly, a receiving-end device can properly receive a connection frame even in an environment where the connection frame is likely to be affected by noise.11-13-2008
20130129012TRANSMITTER DIVERSITY TECHNIQUE FOR WIRELESS COMMUNICATIONS - A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes space diversity and either time or frequency diversity. Space diversity is effected by redundantly transmitting over a plurality of antennas, time diversity is effected by redundantly transmitting at different times, and frequency diversity is effected by redundantly transmitting at different frequencies: Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the same diversity gain as the maximal-ratio receiver combining (MRRC) scheme with one transmit antenna and two receive antennas. The principles of this invention are applicable to arrangements with more than two antennas, and an illustrative embodiment is disclosed using the same space block code with two transmit and two receive antennas.05-23-2013
20130129013METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN A RADIO COMMUNICATION SYSTEM - A method of transmitting, by a transmitter, information in a wireless communication system, the method includes generating first and second symbols; generating first and second transmit vectors on the basis of an Alamouti code from the first and second symbols; and transmitting the first transmit vector through a first antenna and transmitting the second transmit vector through a second antenna. The first transmit vector consists of a first transmit symbol and a second transmit symbol. The second transmit vector consists of a third transmit symbol and a fourth transmit symbol. The first, second, third, and fourth transmit symbols are transmitted based on first and second resource indexes. The first symbol is a first modulation symbol for first information, and the second symbol is a second modulation symbol for second information.05-23-2013
20100296603System and Method for Channel Interleaver and Layer Mapping in a Communications System - A system and method for channel interleaver and layer mapping in a communications system with spatial multiplexing are provided. A method for transmitting information over M layers, where M is a positive integer value representing a number of spatial layers, and M≧2, includes receiving at least one codeword to transmit, grouping a plurality of symbols in the at least one codeword into M groups, mapping the M groups to the M layers, and transmitting the M layers. The at least one codeword includes the plurality of symbols, and each symbol includes two or more code bits.11-25-2010
20110129030Method circuit and system for transmitting and/or receiving signals - Disclosed is a radio frequency digital transmitter adapted to transmit content using a frame based protocol where each (data) frame may be parsed into two or more timeslots. The transmitter may comprise a bandwidth adjustable modulator adapted to modulate a data frame provided by an encoder and an encoder adapted to encode each of a set of data services into one or more timeslots of the data frame, based on the bandwidth of the modulator. The encoder may select a number of timeslots to insert into the data frame based on the bandwidth of the modulator.06-02-2011
20100296604SYSTEMS AND METHODS FOR IMPLEMENTING RECEIVER TRANSPARENT Q-MODE - In a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by a transmitter, the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the transmitter could enter and exit Q-mode as desired while the receiver, could, for example, continue to function as if operating normally, such as in “showtime.” Through this approach, it is not necessary for the receiver to detect the transmitter's entry and exit of Q-mode.11-25-2010
20100296601METHOD AND APPARATUS OF COMMUNICATION USING SOFT DECISION - A method for performing a reliable communication using soft decision information and a random linear coding in the wireless access system is disclosed. The communication method includes arranging received random-linear-coded first code blocks in descending order of their soft decision levels, and performing a random linear decoding on a first code block set, wherein the first code block set is constructed of the first code blocks arranged in the descending order of their soft decision levels. If any error occurs in the random linear decoding step of the first code block set, the method further includes performing a random linear decoding on a second code block set, wherein the second code block set is constructed when a code block having the lowest soft decision level among code blocks contained in the first code block set is replaced with another first code block.11-25-2010
20100303168Data Transmission Method for Orthogonal Frequency Division Multiplexing System - A data transmission method for orthogonal frequency division multiplexing system, specifically comprises sending M, which is greater than 1, OFDM symbols included in each data transmission unit with different bandwidth, wherein each data transmission unit with different bandwidth sends two kinds of OFDM symbols with different cyclic prefix lengths: OFDM symbols with the long cyclic prefixes and OFDM symbols with the short cyclic prefixes; and the data transmission units with different bandwidths transmit the identical number of OFDM symbols with the long cyclic prefixes and the identical number of the OFDM symbols with the short cyclic prefixes.12-02-2010
20130136204TURBINE METER PRE-SCALING TERMINAL BLOCK ELECTRONICS - An electronic circuit for converting higher-frequency output signals from a sensor into lower-frequency input signals for a discrete input wireless transmitter. The circuit includes a differential amplifier, a digital comparator, a digital frequency divider, and a transistor switch. The differential amplifier amplifies the sensor signals as a function of a frequency of the sensor signals. The digital comparator generates a square wave signal by comparing the amplified sensor signals to a fixed reference voltage. The digital frequency divider generates a lower-frequency signal by dividing the square wave signal. The transistor switch generates the lower-frequency input signals for the discrete input wireless transmitter by switching as a function of the lower-frequency signal from the digital frequency divider.05-30-2013
20100310004METHODS AND APPARATUS FOR AMPLIFYING AND TRANSMITTING SIGNALS - A wireless communications device transmits during a first time using a single tone and during a second time using a plurality of tones. The wireless communications device uses linear power amplification for transmitting multi-tone signals and non-linear power amplification for transmitting at least some single tone signals. In some embodiments a linear amplification range on a first amplifier's characteristic curve is used for the linear amplification and a non-linear amplification range on the first amplifier's characteristic curve is used for the non-linear amplification. Filtering subsequent to the amplification is controlled to accommodate the type of amplification being used. In some embodiments, the decision as to whether to use linear amplification or non-linear amplification is a function of whether the intended transmitted signal is to be a single tone signal or a multi-tone signal. In some embodiments, the decision is also a function of intended range.12-09-2010
20110110460WIRELESS COMMUNICATION DEVICE - An object of the present invention is to improve the throughput and reduce the circuit size and power consumption for transmission.05-12-2011
20110013720METHOD AND APPARATUS FOR GENERATING RANGING PREAMBLE CODE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of generating a ranging preamble code in a wireless communication system is provided. A mobile station (MS) receives ranging channel information, and generates the ranging preamble code by selecting one of a plurality of candidate ranging preamble codes based on the ranging channel information. The plurality of candidate ranging preamble codes are based on a Zadoff-Chu (ZC) sequence of which a length is N01-20-2011
20110110456Common Wave and Sideband Mitigation Communication Systems And Methods For Increasing Communication Speeds, Spectral Efficiency and Enabling Other Benefits - Common wave and sideband mitigation communication systems and methods are provided that can be used with both wireless and wired communication links. The systems and methods provided can enable faster data rates, greater immunity to noise, increased bandwidth/spectrum efficiency and/or other benefits. Applications include but are not limited to: cell phones, smartphones (e.g., iPhone, BlackBerry, etc.), wireless Internet, local area networks (e.g., WiFi type applications), wide area networks (e.g., WiMAX type applications), personal digital assistants, computers, Internet service providers and communications satellites.05-12-2011
20090296852RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION APPARATUS USING ADAPTIVE MODULATION SYSTEM - A propagation path estimator in a terminal station detects an average RSSI value for a downlink channel, and notifies a base station of the detected average RSSI value. The base station in turn receives the average RSSI value for the downlink channel from the terminal station, and detects an average RSSI value for an uplink channel by its propagation path estimator. Then, an adaptive modulation controller in the base station compares the lower one of the received average RSSI value for the downlink channel and the detected average RSSI value for the uplink channel with a threshold to determine a modulation scheme. The base station notifies the determined modulation scheme to the terminal station such that the modulation scheme is set to a modulator while a corresponding demodulation scheme is set to a demodulator in the terminal station.12-03-2009
20100322344DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcast receiving system and a method for controlling the same are disclosed. The method includes the steps of receiving a broadcast signal having mobile service data and main service data multiplexed therein, extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data, wherein the FIC signaling information includes a current/next (C/N) indicator, and wherein the TPC signaling information includes FIC version information, and detecting ensemble configuration information of a current MH frame.12-23-2010
20100322340METHOD AND APPARATUS FOR IMPROVING THE RELIABILITY OF A SERIAL LINK USING SCRAMBLERS - Embodiments provide for a method for eliminating pathological sequences in a serial bit stream. Parallel data words having a first bit length are received. The received data words may be analyzed for a pathological sequence. If a pathological sequence is present in a data word, the data word containing the pathological sequence may be segmented into data segments having bit lengths less than a pathological sequence. The data word may be reformatted by generating reformatted data words having a second bit length. The reformatted data words may contain at least one of the data segments and the second bit length is greater than the first bit length. The reformatting may be performed by adding framing bits to the segments to form the reformatted data words. The reformatted data words are transmitted in place of the data word containing the pathological sequence.12-23-2010
20110110457Method and Apparatus for a Single-Carrier Wireless Communication System - A method of communication comprises partitioning a single-carrier data stream into equal-size blocks, and partitioning each block into a plurality of equal-size sub-blocks. A first set of cyclic prefixes and/or postfixes is inserted into the blocks to allow a linear convolution of a frequency-selective multipath channel having a long delay spread to be modeled as a circular convolution at a receiver. A second set of cyclic prefixes and/or postfixes is inserted into the sub-blocks to allow a linear convolution of a frequency-selective multipath channel having a short delay spread to be modeled as a circular convolution at the receiver. Upon receiving a transmitted data frame from the multipath channel, the receiver measures a link quality index (LQI) of a short channel impulse response; and selects block-by-block equalization or sub-block by sub-block equalization based on the LQI.05-12-2011
20100322343COMMUNICATION METHOD AND APPARATUS USING CODEBOOK IN MIMO SYSTEM - A method and apparatus for transmitting and receiving signals using a codebook which maps each codeword to at least two different antennas is provided for a MIMO system. A transmission method includes mapping multiple codewords to multiple layers; mapping the multiple layers to multiple antennas using a precoding matrix selected from a rank-3 codebook which is designed to map the codewords to different antennas; and transmitting the codewords through paths formed by mapping the layers and the antennas. The precoding matrix of the rank-3 codebook is designed to equalize transmit power ratios between the antennas. The communication method and apparatus is advantageous to solve the problem of transmit power imbalance among the layers and the problem of performance degradation at the high SNR region in the conventional system using the rank-3 precoding matrices.12-23-2010
20100322342METHODS AND APPARATUS TO ENCODE BANDWIDTH REQUEST MESSAGE - A subscriber station is capable of encoding a bandwidth request message. The subscriber station includes a controller and a transmitter coupled to the controller. The transmitter includes a linear channel encoder and a Quadrature Phase Shift Keying (QPSK) modulation block. The channel encoder uses a generator matrix comprising alphabets from Galois field (GF) (2). Each column of the generator matrix belongs to a twelve dimensional subspace and wherein the code generated using the generator matrix has a minimum hamming distance no greater than thirty.12-23-2010
20110007837DTV RECEIVER AND METHOD OF PROCESSING BROADCAST SIGNAL IN DTV RECEIVER - A DTV receiver includes a tuner tuning to a channel to receive a broadcast signal, and a demodulator demodulating the broadcast signal. The receiver further includes a first decoder which decodes main and enhanced data included in the demodulated signal by calculating soft decision values for the enhanced data and hard decision values for the main data. The receiver further includes a second decoder for decoding the main and enhanced data for first forward error correction, and a third decoder for decoding the FEC-decoded enhanced data for second forward error correction.01-13-2011
20090067536WIDE-BAND DIRECT CONVERSION TRANSMISSION APPARATUS - There is provided a wide-band direct conversion transmitting apparatus including: a local oscillation unit generating first, second, and third oscillation signal pairs each including a pair of signals having a phase difference of 90°; an image rejection mixer unit mixing baseband transmission signals including an I signal and a Q signal having a phase difference of 90° with the first oscillation signal pair; a harmonic rejection mixer unit mixing each of the first, second, and third oscillation signal pairs with the baseband transmission signals; and an output signal selecting unit selecting output signals from the image rejection mixer unit or from the harmonic rejection mixer unit.03-12-2009
20090067538RECEIVER BASED TRANSMISSION CHARACTERISTIC ESTIMATOR - A processor-implemented method of estimating the saturation level of a transmitter from a transmitted communication signal received from the transmitter comprises generating a received data signal from the transmitted communication signal received from the transmitter, generating a transmitted data signal from the received data signal that corresponds to the actual data signal generated at the transmitter, comparing the transmitted data signal to the received data signal, and estimating the saturation level of the transmitter based on the comparison of the transmitted data signal to the received data signal.03-12-2009
20090067537Adjustable Dual-Band Link - A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a baseband circuit and at least a passband circuit. The baseband circuit corresponds to a baseband sub-channel and the passband circuit corresponds to a passband sub-channel. The first communication link circuit also includes a circuit that distributes a first subset of a data stream having a first symbol rate to the baseband circuit and a second subset of the data stream having a second symbol rate to the passband circuit. The baseband sub-channel and the passband sub-channel are separated by an adjacent guardband of frequencies. The passband carrier frequency is adjusted to define the guardband and the guardband corresponds to a first notch in a channel response of a first communications channel.03-12-2009
20110044401APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND METHOD OF TRANSMITTING AND RECEIVING A SIGNAL - A method of transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method includes receiving the signal of a first frequency band, obtaining layer-1 information from a preamble of the first time-frequency slicing (TFS) signal frame of the received signal, said layer-1 information including an index of a current radio frequency nal (RF) channel within a time-frequency slicing (TFS) signal frame, and an identifier of a starting radio frequency (RF) channel which can receive a physical layer pipe (PLP) in the TFS signal frame, parsing the TFS signal frame using the layer-1 information and obtaining a physical layer pipe (PLP) of the TFS signal frame, and converting the PLP to a service stream.02-24-2011
20110044404DIGITAL MODULATOR - The application relates to a digital modulator comprising at least one input terminal configured to receive at least one signal, at least one symbol generating unit comprising a first output terminal and at least a second output terminal, wherein the symbol generating unit is configured to generate a first symbol waveform for the first output terminal depending on the received signal, and wherein the symbol generating unit is configured to generate at least a second symbol waveform for the second output terminal depending on the received signal, wherein the first symbol waveform comprises at least one different parameter value compared to the second symbol waveform, at least one third output terminal connectable to at least the first output terminal and/or second output terminal via a switching unit, a controlling unit configured to control the switching unit depending on the received signal such that a modulated output signal is generated.02-24-2011
20110044400VECTOR QUANTIZATION IN WIRELESS COMMUNICATION - Disclosed is a method of communicating a complex vector, using one or more index bits, the method comprising quantizing the complex vector using a codebook, the codebook comprising a plurality of complex vectors mapped from real vectors that lie on a reflected simplex where the simplex is of dimension one less than twice the length of the complex vector; indexing the quantized vector to form the one or more index bits; and transmitting the index bits to the transmitter, thereby communicating the complex vector.02-24-2011
20110110459FM OFDM over various communication media - The present invention provides an FM Orthogonal Frequency Division Multiplexing (OFDM) modulation process that enable high-speed data communications over any transmission media and networks. The process is implemented with a modem device modulator and demodulator that provides communication with several other modem devices along any communication media that uses an FM OFDM modulation technique, a physical transmission medium such as power lines, or wireless (air), or cable, or twisted pairs communication media.05-12-2011
20110110461COMMUNICATION PROTOCOL METHOD AND APPARATUS FOR A SINGLE WIRE DEVICE - The present invention is a noise tolerant communication protocol device and method where a clock signal input triggers an internal delay clock in an integrated circuit. Data is presented to an input pin and sampled prior to the next external clock pulse based on the internal delay clock. A data pulse value is distinguished by input signal voltage level and not by pulse length. Sampling of data bits is deferred until a signal level is most likely stable, thereby avoiding sampling during periods around edges of changing data values. Therefore, error detection and correction circuitry is not required. A time reference pulse, produced by a bus master, is measured by the protocol device to determine a data transmission rate by the master. The timing of sampling of input signaling from the master is determined by the protocol device from measurement of the time reference pulse magnitude.05-12-2011
20110110455RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding.05-12-2011
20110110454MIXED MODE PREAMBLE DESIGN FOR SIGNALING NUMBER OF STREAMS PER CLIENT - Certain aspects of the present disclosure present a technique for designing a signal (SIG) field of a mixed mode preamble transmitted to a plurality of user terminals. The SIG field can signal a number of spatial streams assigned to each user. The SIG field is designed such that a robust interference cancellation can be achieved at each user terminal.05-12-2011
20100080321Method and apparatus for checking asynchronous transmission of control signals - In a method for asynchronously transmitting control signals from a transmitter end to at least one receiver via a plurality of control lines, control signals received via the individual control lines are logically combined with one another at the receiver end and the result of the logic combination is transmitted to the transmitter end.04-01-2010
20110019766Process and Device for Encoding, and Associated Electronic System and Storage Medium - The invention relates to an encoder (01-27-2011
20110019768METHOD AND APPARATUS FOR SPECTRALLY EFFICIENT LINK ADAPTATION USING HARQ IN OFDMA SYSTEMS - A method increases spectral efficiency in a communication system. The communication system includes at least one mobile station and is capable of transmitting messages encoded according to a plurality of available modulation coding schemes (“MCSs”). Each available MCS includes a modulation scheme and an effective coding rate. The MCSs are indexed according to increasing complexity. A signal-to-interference ratio (“SINR”) is determined which is sufficient to satisfy a predetermined frame error rate (“FER”). A first MCS and a corresponding amount of transmissions needed to satisfy the predetermined FER at the SINR using the first MCS are determined. The first MCS has a higher effective coding rate than a second MCS. The second MCS sufficiently satisfies the predetermined FER at the SINR in a single transmission. A message encoded according to the first MCS is transmitted through the communication system using hybrid automatic repeat request (“HARQ”)01-27-2011
20100080320CODING AND MODULATION SELECTING METHOD AND WIRELESS COMMUNICATION EQUIPMENT - Disclosed herewith is a radio communication apparatus capable of selecting proper one of plural communication modes such as a MIMO communication system so as to obtain a higher communication rate within a range in which chain retransmission occurrence is prevented. The MIMO system deciding section of the transmitter unit decides a proper MIMO system with reference to the CQI value demultiplexed by a demultiplexer and the AMC table controlling section changes the MCS value step by step according to the transmission count and the result (success/failure) of the communication. Furthermore, the AMC table controlling section updates the mean rate in the measured rate table when the subject data is received successfully or when the transmission count reaches the maximum value.04-01-2010
20110019763USB 2.0 HS Voltage-Mode Transmitter With Tuned Termination Resistance - A high-speed universal serial bus (USB) transceiver includes a voltage-mode architecture for generating a USB signal. The voltage mode architecture reduces power consumption by reducing the current requirements for high-speed USB communications. The USB transceiver can include a reference voltage generator, a resistive element, and a switching element for completing and breaking a circuit including the reference voltage generator, the resistive element, and a data pin of a USB port to generate half of the differential USB signal (e.g., the D+ signal). A similar circuit can be used to generate the other half of the differential USB signal (i.e., the D− signal). The resistive element can be a set of parallel resistors in the transceiver, with the set of parallel resistors being specifically selected from a larger population of resistors to provide the specified resistance (45 Ω±10%) in the USB transceiver.01-27-2011
20110026637METHOD AND APPARATUS FOR TRANSMITTING PILOT SIGNAL IN A MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a pilot signal in a Multiple Input Multiple Output (MIMO) wireless communication system are disclosed. The method sets a power of pilot signal to be transmitted in a pilot pattern according to a predefined ratio of a total power of the pilot signal to a total power of data tones being transmitted together with the pilot signal on a subframe.02-03-2011
20100172432METHOD AND APPARATUS USING A BASE CODEBOOK STRUCTURE FOR BEAMFORMING - Techniques for a precoding scheme for wireless communications are described. A method and apparatus may comprise a first device for a communications system to determine a beamforming structure for a closed loop transmit beamforming scheme using channel information, one or more scaling factors and one or more integers to represent a complex vector. The beamforming structure may include a codeword, a codebook and a codeword index. Other embodiments are described and claimed.07-08-2010
20110116569WIRELESS DATA COMMUNICATION METHODS AND APPARATUS - A data communication system has a station that includes multiple antenna elements. The station communicates to the antenna elements by way of digital data channels. Each antenna is connected to an RF module that receives data by way of a corresponding digital data channel, encodes and transmits the data. Adaptive beamforming may be performed for interference mitigation. Embodiments use the strength of pilot signals and/or error vector magnitudes as cost functions for an adaptive beamforming alogorithm such as optimum combining. Unused sub-carriers may be applied to provide in-band communication to facilitate channel switching, data reallocation and other interference mitigation strategies.05-19-2011
20110116567MULTIPLE TRANSMISSION APPARATUS WITH REDUCED COUPLING - The present invention relates to a transmission apparatus having at least two transmission branches for transmitting respective transmission signals at substantially same frequencies, and to a method of controlling such a transmission apparatus. A first oscillator circuit (05-19-2011
20110044403System and Method for Reducing Peak-To-Average Power Ratio For Multi-Carrier Communication Systems - The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations. The disclosed system and method improves the total system DC power efficiency and provides an optimal solution for PAPR reduction in multi-carrier communication systems such as, for example, OFDM.02-24-2011
20110044402Method and Apparatus for Transmitting Signals in a Multiple Antennas System - A method and apparatus for transmitting signals in a Multiple Antennas System (MAS) are disclosed. The method includes performing Alamouti coding on each group of common channel symbols to form two branches; selecting different weight vectors for different branches to perform beamforming, obtaining transmitting signals of each branch on each antenna, where beam modes corresponding to different weight vectors are uncorrelated and the peak-to-average power ratio of angle dimension of the two beam modes are lower than a preset threshold; and superimposing the transmitting signals of these two branches on each antenna, and transmitting the superimposed signals. In the present invention, the Alamouti coding is introduced, and a spatial diversity gain is generated by using the independence of two virtual channels. Thus, the performance of the MAS in full coverage is enhanced.02-24-2011
20110116571OFDM/DMT/DIGITAL COMMUNICATIONS SYSTEM INCLUDING PARTIAL SEQUENCE SYMBOL PROCESSING - A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.05-19-2011
20110116568BLOCK-CODED GROUP MODULATION METHOD AND TRANSMITTER/RECEIVER USING THE SAME - A block-coded group modulation method includes generating a symbol by grouping at least one bit of a data bit stream into one group, classifying the symbol into an n number of sections, and generating an n number of initial information bits. Next, the method includes setting up the size of a pulse corresponding to signal energy transmitted through each of the n sections, generating an additional information bit on the basis of the number of cases according to the sequence of the energy sizes, and generating final information bits by inserting the additional information bit into the initial information bits.05-19-2011
20110116570METHOD OF TRANSMITTING SIGNAL AND METHOD OF RECEIVING SIGNAL - In a multicell communication system, a terminal that belongs to a second cell using the same subcarrier as a terminal that belongs to a first cell changes a pilot in an allocated basic resource block. Then, a base station that manages the first cell can estimate a channel of an interference signal transmitted from a second cell from a reception signal even though the reception signal includes an interference signal from the terminal that belongs to the second cell at the time of receiving a signal transmitted from the terminal that belongs to the first cell. Further, the base station that manages the first cell may reduce an interference signal from a reception signal by using a channel estimation value.05-19-2011
20110019765METHOD, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR PROVIDING A DATA ENCODING/DECODING SCHEME - An apparatus for providing a data encoding scheme may include an encoder. The encoder may be configured to determine, for a digital input value comprising a particular number of bits, whether more than half of the bits of the digital input value have a high value. The encoder may be further configured to encode the digital input value by inverting each of the bits of the digital input value in response to a determination that more than half of the bits of the digital input value have the high value. Corresponding method and computer program product, and a decoder and decoding method are also provided.01-27-2011
20090080565PULSE SHAPING FOR EGPRS-2 - A method and apparatus are disclosed for wireless transmission using two or more pulse shaping filters. Wireless transmit/receive units (WTRUs) and network entities are capable of utilizing a narrow band pulse shaping filter, a wideband pulse shaping filter, or both. The network entity and/or the WTRU select a pulse shaping filter to be used and transmits the selection by means of signaling. The signaling may be performed through layer 03-26-2009
20120243635METHOD OF TRANSMITTING DATA IN A MOBILE COMMUNICATION SYSTEM - Provided is a method for a device to receive a signal for synchronization. The method may include receiving the signal for synchronization as defined by a sequence corresponding to an interleaved concatenation of a first sequence and a second sequence. Components of the first sequence may correspond to odd-th components of the sequence corresponding to the interleaved concatenation. Components of the second sequence may correspond to even-th components corresponding to the interleaved concatenation. The method may also include detecting group identification (ID) that is defined based on a combination of a first ID of the first sequence and a second ID of the second sequence.09-27-2012
20100254487Apparatus and method for determining optimum integer perturbation vector of low complexity in multiple antenna system - An apparatus and a method for determining an optimum integer perturbation vector of a low complexity in a multiple antenna system include a transmitter that transmits data using an optimum integer perturbation vector of a low complexity in a multiple antenna system includes a module pre-processor, a shift pre-processor, and a precoder. The modulo pre-processor adds an integer perturbation vector to a transmission signal vector. The shift pre-processor phase-shifts a pseudo inverse matrix of a channel matrix using a phase angle. The precoder precodes a transmission signal vector perturbed by the integer perturbation vector using the phase-shifted pseudo inverse matrix of the channel matrix.10-07-2010
20090220025Transmission method, transmission circuit and transmission system - A transmission method for transmitting transmission data via a single line, includes: transmitting, as the transmission data, data that has one rising or falling transition of the amplitude of the data in each clock cycle of a clock and that carries a 2- or greater-bit value, making use of the phase from the edge of the clock to the transition in amplitude of the data.09-03-2009
20100220808RADIO TRANSMISSION DEVICE, RADIO RECEPTION DEVICE, RADIO TRANSMISSION METHOD, AND RADIO RECEPTION METHOD - It is possible to provide a radio reception device, a radio transmission device, a radio reception method, and a radio transmission method which can improve the channel estimation accuracy and the reception quality. The radio reception device (09-02-2010
20110211654COMMUNICATION DEVICE FOR RECEIVING AND TRANSMITTING OFDM SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.09-01-2011
20110211653Device and Method for the Optimal Estimation of Distortion of a Transmission Medium, Comprising the Sequential Emission of Pairs of Quadrature Complementary Sequences - The present invention relates to a device and method for optimal estimation of the distortion caused by the transmission medium by means of the sequential emission of pairs of quadrature complementary sequences, estimating the frequency spectrum of a transmission channel allows obtaining information of considerable interest to analyze its characteristics or correcting the distortion effects introduced in a communication system. This invention describes a new method for extracting said characteristics generating a transmission preamble using complementary sequences, which allows upon reception identifying the distortion caused in each of the I/Q phases of a quadrature modulation system on the transmitted symbols, canceling the phase distortion effects caused by the medium and reducing the equalization of the channel to a single equalizing baseband filter identical for both I09-01-2011
20110211652Method and Apparatus for OFDM Spectral Diversity Using Guard Bands - An OFDM modulation process and means for transmitting multiple carriers through a communication channel having a bandwidth arranged ion chunks with further subcarriers being allocated to form at least one guard band, comprising automatically and periodically shifting said chunks to the left or to the side in order to overlap said guard band and increase spectral diversity.09-01-2011
20090323855METHOD AND APPARATUS FOR GENERATING CODE SEQUENCE IN A COMMUNICATION SYSTEM - Disclosed are a method for generating a code sequence that can be used for acquisition of initial synchronization, cell detection, channel estimation, etc. in a mobile communication system, and a transmitter. A method for generating a code sequence in a transmitting side of a mobile communication system includes combining at least two code sequences with each other, and converting a code sequence generated by the combining step into a time domain signal.12-31-2009
20110150124MODULATION APPARATUS, MODULATION METHOD, DEMODULATION APPARATUS, AND DEMODULATION METHOD - A modulation apparatus performs modulation in which a signal wave form is positioned at the front part of an entire symbol duration or the latter part of the entire symbol duration based on a first bit of the bit information to generate a modulation symbol including a silent signal duration in which there is no signal waveform. Particularly, the method delays a signal corresponding to a quadrature-phase signal axis by a predetermined time, thereby cancelling a phase difference between symbols.06-23-2011
20090213959TRANSMITTING APPARATUS AND TRANSMITTING METHOD, RECEIVING APPARATUS AND RECIVING METHOD, TRANSCEIVER APPARATUS,COMMUNICATION APPARATUS AND METHOD, RECORDING MEDIUM, AND PROGRAM - The present invention relates to a transmitting apparatus, a transmitting method, a receiving apparatus, a receiving method, a transceiver, a communication apparatus and method, a recording medium, and a program in which high quality voice can be decoded. A cellular telephone 08-27-2009
20090213958Transmitting apparatus and transmitting method, receiving apparatus and receiving method, transceiver apparatus, communication apparatus and method, recording medium, and program - The present invention relates to a transmitting apparatus, a transmitting method, a receiving apparatus, a receiving method, a transceiver, a communication apparatus and method, a recording medium, and a program in which high quality voice can be decoded. A cellular telephone 08-27-2009
20090213957SYSTEM AND METHOD FOR PROVIDING MULTICAST AND BROADCAST SERVICES - A method for providing a multicast and broadcast service (MBS) by transmitting a plurality of data frames in a wireless network. The method includes: generating a first MBS data information element (MBS-DATA-IE) in a first one of the data frames, the first MBS-DATA-IE including information relating to a logical channel of the MBS, and indicating a location of an MBS map (MBS-MAP) in a second one of the data frames; determining ones of the data frames between the first and second ones of the data frames in which to add a plurality of extra MBS-DATA-IEs; and generating the extra MBS-DATA-IEs, the extra MBS-DATA-IEs being generated in the determined ones of the data frames and including information relating to the logical channel.08-27-2009
20090213956OPTIMAL TCM CODEC SEARCH METHOD FOR DUAL STREAM SYSTEMS, AND ENCODER/DECODER USING THE SAME - Provided is a method for searching for an optimal coder suitable to a dual stream transmission method of a DTV transceiving apparatus, and an encoder and a decoder employing the optimal coder searching method. The optimal coder searching method includes the steps of: a) determining a mixed pattern of normal stream and robust stream; b) determining a trellis structure of the robust stream which is applied to the mixed pattern based on how coders are connected; c) forming a dual stream trellis by mixing a trellis of the normal stream, which is a normal stream trellis, and a trellis of the robust stream, which is a robust stream trellis; d) computing a free distance at departing points of the dual stream trellis structure based on a dual stream free distance computation termination condition; and e) determining the optimal coder based on the free distance.08-27-2009
20110150127In-Band Ripple Compensation - It is described a technique to compensate the in-band ripple of filters at the IFFT prior to filtering in the transmitter or, for the receiver, in the FFT after filtering. A transmitter, includes a multiplier for multiplying at least one transmitter coefficient to an input signal of an inverse Fourier transformer which is followed subsequent signal processing chain thereby reducing a ripple on the output of said signal processing chain. A receiver for receiving a transmission signal includes a signal processing chain for processing the transmission signal a multiplier for multiplying at least one receiver coefficient to an output signal of a Fourier transformer to which the output of the signal processing chain is fed to thereby reduce a ripple on said output signal of said Fourier transformer.06-23-2011
20110096867Method and Apparatus for Providing Pilot Signals in OFDM Frames - In a telecommunication network, pilot signals are provided in OFDM (orthogonal frequency division multiplexing) frames to enable the SC-FDMA (the single-carrier frequency division multiple access) concept to work with the OFDMA concept in uplink substantially harmonically, wherein each OFDM frame includes a predetermined plurality of OFDM symbols, and at least one pilot signal is placed in addition to other data and/or signals within at least one existing OFDM symbol of said predetermined plurality of OFDM symbols.04-28-2011
20090028269Signal Generator and Method - There is an apparatus and technique for generating a sequence of modulated waveforms of finite duration in which the difference in start time of each waveform is shorter than the waveform's overall duration and each waveform in the sequence has independent data modulation imparted upon it. The apparatus consists of a bank of memory cells arranged in an N×M configuration with associated control circuitry, along with an arrangement scheme for the data in the N×M memory cells such that the waveforms will be correctly reproduced when the memory cells are addressed by the control circuitry in the prescribed order.01-29-2009
20090028268Variable power communications including rapid switching between coding constellations of various sizes - A method of varying the power output of a transmitter. The method includes providing bit-loading information associated with each tone of multiple tones, where the multiple tones include a first set of tones. The method also includes producing, for transmission, on the first set of tones a first set of constellation symbols based upon the bit-loading information. The method also includes producing a second set of constellation symbols for transmission, where there is a difference of n bits between the bit size of the second bit sequence constellation symbol on each tone of the second set of tones and the bit-loading information associated with each tone of the first set of tones, and where n is an integer greater than or equal to 0.01-29-2009
20100246713TRANSMITTER COMPRISING A PULSE WIDTH PULSE POSITION MODULATOR AND METHOD THEREOF - A baseband signal generator (09-30-2010
20100246712METHOD AND APPARATUS FOR DATA TRANSMISSION - A method for data transmission is disclosed. The method includes: performing, by a system, resource element mapping on modulation symbols which include data to be transmitted and reference signals and which are allocated to antenna ports of a designated type; performing antenna port mapping on the modulation symbols which are through the resource element mapping; and generating Orthogonal Frequency Division Multiplexing (OFDM) signals based on the modulation symbols which are through the antenna port mapping and transmitting the OFDM signals via physical antennas. The present invention also discloses an apparatus for data transmission. In the method and apparatus provided by the present invention, through establishing a mapping relationship between physical antenna elements and antenna ports, beamforming weights are added to modulation symbols of users at the same time. Thus, beamforming operation of the users is implemented. Accordingly, the system may support flexible beamforming transmission on frequency-domain, which greatly improves the flexibility of data transmission of the system.09-30-2010
20100246711MULTICARRIER TRANSMITTER AND MULTICARRIER RECEIVER - A multicarrier transmitter and a multicarrier receiver both enabling improvement of the reception characteristic of hierarchical modulation multiplex communication. A base station (09-30-2010
20100246710TRANSMITTER AND SSB SIGNAL GENERATION METHOD - A transmitter of a complex SSB signal in which the bit error rate characteristic on the receiving side is improved remarkably. The transmitter generates the SSB signal using an N-fold oversampler (09-30-2010
20110080974RADIO TRANSMITTER APPARATUS - Radio transmitter apparatus for transmitting data over a radio channel, the apparatus comprising an encoder for encoding the data to be transmitted to generate a first symbol, a processor for calculating from the first symbol a second symbol, a modulator for modulating the first symbol onto a primary carrier in a primary frequency band and for modulating the second symbol onto one or more secondary carriers in one or more secondary frequency bands and a transmitter for transmitting the primary carrier and the one or more secondary carriers over the radio channel, wherein the one or more secondary frequency bands are selected such that if aliasing occurs in a receiver receiving the signal an alias associated with the one or more modulated secondary carriers appears in the received primary frequency band.04-07-2011
20100246709PRODUCING CHUNKS FROM INPUT DATA USING A PLURALITY OF PROCESSING ELEMENTS - Input data is divided into multiple segments that are processed by processing elements of a computer. The processing of the segments produces a plurality of tentative sets of chunks. The plurality of tentative sets of chunks are stitched together to produce an output set of chunks.09-30-2010
20110069781WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND TRANSMISSION METHOD - A wireless communication apparatus (a) generates a transmission symbol; (b) assigns, to the transmission symbol, a given number of units each formed of a symbol and a subcarrier in a frame which is formed of M (M is a positive integer) symbols and N (N is a positive integer) subcarriers and includes M×N units, and the given number being not more than M×N, to obtain the given number of identical transmission symbols; (c) multiplies the identical transmission symbols by a code sequence including a plurality of different elements; and (d) transmits the identical transmission symbols multiplied by the code sequence.03-24-2011
20110075759METHOD AND APPARATUS OF TRANSMITTING PPDU IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting a PPDU in a wireless communication system is provided. The method includes selecting a subchannel among a plurality of subchannels, wherein a PLCP preamble and a PLCP header in each PPDU are independently generated in each of the plurality of subchannels, and transmitting a PPDU in the selected subchannel.03-31-2011
20110075757RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate characteristics. In this device, an FFT unit (03-31-2011
20110075756TRANSMITTER - A transmitter includes an OFDM symbol generator for generating an effective symbol including a plurality of sub-carriers orthogonal to each other in frequency and sequentially generating an OFDM symbol in which a signal in a first period from a first end of the effective symbol is added to a second end of the effective symbol as a guard interval, and a convolution filter for performing an convolution operation on data strings at a plurality of sampling points of the OFDM symbol, wherein when the convolution filter performs a convolution operation on the first data strings including a data string at the first end of the effective symbol, the convolution filter performs the convolution operation on the first data strings in which a data string at the second end of the effective symbol is cyclically added to a data string at the first end.03-31-2011
20110075755MULTIPHASE DIRECT RF FREQUENCY TO DIGITAL CONVERTER AND RELATED METHOD - The disclosure provides an effective means for fine-resolution determination of the frequency content of an RF signal using low speed digital circuits. The disclosure relates to a method and apparatus for decomposing a high frequency RF signal into several low frequency signals or data streams without loss of any information and without the use of extraneous circuit components such as local oscillators, mixers or offset phase-locked loops. Single or multiple phase oscillator outputs are fed directly to a single or multiple direct RF frequency-to-digital (DrfDC) circuits. The front end of the DrfDC circuit decomposes a high frequency signal into several low frequency signals without loss of any information. The low frequency signals are processed by the back-end of the DrfDC and converted into digital data streams. The digital data streams are then combined and averaged to represent the frequency of the input RF signal.03-31-2011
20120201326SIGNAL AND DEVICES FOR WIRED NETWORKS - A signal for use on a wired network interconnecting electronic devices, comprising: a base voltage for conveying power to the electronic devices; a pulsed voltage signal bearing coded information for transfer between the electronic devices; and a digital signal superimposed onto selected portions of the pulsed voltage signal, wherein the digital signal comprises a carrier signal modulated by a digital encoded data signal for transfer between the electronic devices, and the digital encoded data signal represents an original digital data signal encoded in accordance with a code scheme that ensures that there is at least one transition, between high and low binary values, between every data bit of the data signal. This is used in fire alarm networks, for example, to convey multimedia or other data such as control signals, whilst maintaining compatibility with existing protocols using the pulsed voltage signal.08-09-2012
20110069782Capacitive-coupled Crosstalk Cancellation - This disclosure presents a method of canceling inductance-dominated crosstalk using a capacitive coupling circuit; it also presents a method of calibrating, selecting and programming a capacitance value used for coupling, so as to add a derivative of each aggressor signal to each victim signal, and thereby negate crosstalk that would otherwise be seen by a given receiver. In the context of a multiple-line bus, cross-coupling circuits may be used between each pair of “nearest neighbors,” with values calibrated and used for each particular transmitter-receiver pair. Embodiments are also presented which address crosstalk induced between lines that are not nearest neighbors, such as, for example, for use in a differential signaling system.03-24-2011
20110069780TRANSMISSION OF SYMBOLS IN A MIMO ENVIRONMENT USING ALAMOUTI BASED CODES - A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an to Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code.03-24-2011
20120201327APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING THE HYBRID-ARQ ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - An apparatus and method are provided for mapping control information to a multiple antenna array to transmit the control information in a mobile communication system. The method includes spreading the control information with an orthogonal sequence according to a spreading factor; and mapping the spread control information to the multiple antenna array based on a repetition index and a Physical Hybrid Automatic Repeat reQuest (HARQ) Indicator CHannel (PHICH) group index. The spread control information is mapped to the multiple antenna array in an alternating pattern in accordance with the repetition index.08-09-2012
20120201325APPARATUS AND METHOD FOR PROVIDING A REDUCED REPRESENTATION BASED ON A TIME-DOMAIN RF SIGNAL - An apparatus according to an embodiment of the present invention for providing a reduced representation in a frequency-domain, based on a time-based RF signal, has a time-frequency converter adapted to transform the time-domain RF signal to obtain a frequency-domain representation based on the time-domain signal and an entropy encoder adapted to obtain the reduced representation based on the frequency-domain representation by entropy encoding.08-09-2012
20120201324VARIABLE INTER SYMBOL INTERFERENCE GENERATOR - Embodiments of the present invention provide a variable inter symbol interference generator that generates a data signal having a variable amount of inter symbol interference by passing a data signal through (1) a programmable filter having an adjustable frequency response, and through (2) a fixed filter having a fixed frequency response such as a PCB trace, a length of cable, a discrete filter, or the like. By adjusting the parameters and therefore the insertion gain or loss of the programmable filter, a large range of continuously variable and finely-tunable inter symbol interference amounts can be easily generated.08-09-2012
20110150129DEVICE FOR GENERATING CODEBOOK, METHOD FOR GENERATING CODEBOOK, AND METHOD FOR TRANSMITTING DATA - A device for generating a transmission codebook in a communication system including a multi-input multi-output (MIMO) antenna according to an embodiment of the present invention includes: a frequency determiner that determines a frequency to allow the transmission codebook to have an optimal characteristic; a precoding matrix generator that generates a precoding matrix on the basis of the frequency; and a codebook generator that generates a retransmission codebook to be used for retransmission on the basis of the precoding matrix and generates the transmission codebook on the basis of the retransmission codebook.06-23-2011
20110150126SYSTEMS AND METHODS FOR DIRECT CURRENT SYSTEM DIGITAL CARRIED MESSAGE CONVEYANCE - The systems and methods of the present invention provide for conductive emissions communication without requiring dedicated communications wires. The systems and methods have the capability to send digital messages over the same wires that are used to power DC systems. Hardware filter circuits are combined with advanced algorithms in a communications control chip to permit the elimination of the dedicated wires, thereby needing zero additional wires to accomplish the task of digital control.06-23-2011
20110249767METHOD AND APPARATUS FOR REFERENCE SIGNAL SEQUENCE MAPPING IN WIRELESS COMMUNICATION - A wireless communication method implemented in a multi-user, multi-input multi-output MU-MIMO system is disclosed which includes forming one or more antenna port sets, wherein an antenna port set comprises two or more antenna ports and allocating transmission resources to a user equipment reference signal UE-RS, the allocating being based at least in part on an antenna port set index.10-13-2011
20120275542Method for Transmitting an Information Sequence - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.11-01-2012
20130121438PRECODING METHOD, AND TRANSMITTING DEVICE - Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.05-16-2013
20110255630Enhanced MBS for OFDM Systems - A method of performing a multicast broadcast service (MBS) transmission in a multiple-input-multiple-output (MIMO) communication comprising: a. transmitting first data over a first MIMO layer, the first data being lower quality data; and b transmitting second data over a second MIMO layer, the second data being enhancement data for enhancing the lower quality data; wherein, the MBS transmission is to be defined at a subscriber station by the result of enhancing the lower quality data with the enhancement data if the first and second data is successfully received, and the MBS transmission is to be defined at the subscriber station by the lower quality data alone if the first data is successfully received and the second data is not.10-20-2011
20100260286DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcasting system and a data processing method are disclosed. A receiving system of the digital broadcasting system includes a baseband processor, a management processor, and a presentation processor. The baseband processor receives broadcast signals including mobile service data and main service data. Herein, the mobile service data may configure a RS frame, which includes mobile service data and table information describing channel configuration information and IP access information of an ensemble level corresponding to the RS frame. The table information is encapsulated to a UDP/IP header. The management processor processes table information from the RS frame to acquire channel configuration information and IP access information of an ensemble level, and accesses mobile service data requested to be received from the RS frame, based upon the acquired information. The presentation processor decodes the accessed mobile service data and outputs the decoded data to a display screen and/or a speaker.10-14-2010
20100260284PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, AND MIMO RECEPTION DEVICE - Provided is a MIMO transmission device which can effectively perform a pilot transmission by using a surplus sample generated in a pilot symbol while maintaining the pilot separation accuracy at a reception side. The MIMO transmission device (10-14-2010
20100296602SIGNAL TRANSMISSION APPARATUS - A signal transmission apparatus that transmits a 1-bit signal obtained by delta-sigma modulation is provided. In the signal transmission apparatus, a pseudo-random noise pattern having a data rate equal to that of the delta-sigma modulated 1-bit signal is generated, and the 1-bit signal is code-modulated using the generated pseudo-random noise pattern. The generated pseudo-random noise pattern and the code-modulated signal obtained through code modulation are transmitted via a transmission line. The transmitted code-modulated signal is demodulated using the transmitted pseudo-random noise pattern.11-25-2010
20110176633METHOD AND SYSTEM FOR ORTHOGONALIZED BEAMFORMING IN MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEMS - A method and system for orthogonalized beamforming in multiple user multiple input multiple output (MU-MIMO) communication systems are presented. Aspects of the method and system include an iterative method for computing a plurality of beamforming matrices in a MU-MIMO system. A transmitting station, such as an access point (AP) for example, may use computed channel estimates, and/or singular vector matrices, to compute orthogonal beamforming matrices. The computed orthogonal beamforming matrices may be used to generate a plurality of signals, which may be concurrently transmitted to the plurality of user devices.07-21-2011
20100266066POWER AMPLIFIER AND RADIO WAVE TRANSMITTER HAVING THE SAME - A power amplifier (10-21-2010
20100260285DIGITAL AMPLITUDE CONTROL OF VECTOR GENERATOR - In an exemplary embodiment, an active vector generator is configured to generate a composite vector with controlled phase and amplitude, where the active vector generator generates the composite vector with independent variable phase control and independent variable amplitude control. Furthermore, in another exemplary embodiment, an active vector generator is configured to generate a unique number of phase states and configured to generate a unique number of amplitude states. Specifically, an exemplary active vector generator comprises a digital-to-analog converter (DAC) configured to set the phase of the composite vector, a current multiplying switch network configured to control the amplitude of the composite vector, a variable current multiplier configured to adjust the amplitude of the composite vector, and a differential adder configured to control the quadrant of the composite vector and generate the composite vector.10-14-2010
20100098190TRANSCEIVER HAVING MULTISTAGE CHANNEL FILTER IN WIRELESS COMMUNICATION SYSTEM - A transceiver having a multistage channel filter for a wireless communication system is disclosed. The transceiver is composed of a transmitter unit including a multistage channel filter module to perform channel filtering on an input signal having a sampling rate corresponding to a channel bandwidth of the wireless communication system by means of sampling-rate conversion through multiple stages, and a receiver unit corresponding to the transmitter unit.04-22-2010
20100098189TRANSMITTER AND RECEIVER FOR A WIRELESS ACCESS SYSTEM, TRANSMISSION METHOD AND RECEPTION METHOD OF THE WIRELESS ACCESS SYSTEM, AND A PROGRAM FOR SAME - An arithmetic process of a quadratic formula that is contained in an exponent of a CAZAC sequence-defining expression is converted to an arithmetic process of a recursion formula to find the above-described exponent, the above-described exponent that was found is used to generate a CAZAC sequence, and the above-described CAZAC sequence that was generated is taken as the reference signal for transmitting and receiving or as a random access preamble signal.04-22-2010
20090175379Transmitter Identification For Wireless Signals Having A Digital Audio Broadcast Physical Layer - According to one embodiment, an apparatus having corresponding computer-readable media comprises: a transmitter marking module adapted to insert a pseudonoise sequence into a Null symbol of a digital audio broadcast (DAB) transmission frame; wherein the pseudonoise sequence represents an identity of a transmitter adapted to transmit a wireless signal representing the DAB transmission frame. According to another embodiment, an apparatus having corresponding computer-readable media comprises: a transmitter identification module adapted to identify a transmitter of a wireless signal representing a digital audio broadcast (DAB) transmission frame based on a pseudonoise sequence present in a Null symbol of the DAB transmission frame.07-09-2009
20110150128MODULATION DEVICE AND METHOD - A modulation device, which reduces out-of-band leakage of a modulated signal while avoiding reduction in resistance to multipath interference, includes: a modulator configured to generate a modulated signal having a predetermined frequency band in a symbol-by-symbol manner according to an input signal; a signal processor configured to remove components in the predetermined frequency band from a portion of the modulated signal including a symbol period boundary, to generate a desired-component removed modulated signal; and a subtracter configured to subtract the desired-component removed modulated signal from the modulated signal generated by the modulator and output the result.06-23-2011
20110150125DIGITAL RF CONVERTER, DIGITAL RF MODULATOR AND TRANSMITTER INCLUDING THE SAME - There are provided a digital RF converter capable of improving a dynamic range and a signal to noise ratio of a transmitter and a digital RF modulator and a transmitter including the same. The digital RF converter may include: a delta-sigma modulated bits (DSMB) sub-block that generates a current magnitude corresponding to least-significant n bits among input signals at a first sampling speed; a least-significant bit (LSB) sub-block that generates a current magnitude corresponding to intermediate k bits among the input signals at a second sampling speed lower than the first sampling speed; and a most-significant bit (MSB) sub block that generates a current magnitude corresponding to most-significant m bits among the inputs signals at the second sampling speed.06-23-2011
20080247486Ultra wideband communication method with low noise pulse formation - An ultra-wide band (UWB) waveform encoding method is provided. The method includes receiving a data stream; generating a first encoder signal and a second encoder signal such that if the first and second encoder signals were mixed, the mixing would return a representation of the data stream; generating a sequence of pulses; mixing the first encoder signal with at least a portion of the sequence of pulses, to produce a mixing result; and mixing the second encoder signal with the mixing result, to produce a sequence of ultra wideband wavelets encoded in accordance with the data stream.10-09-2008
20110150123TRANSMITTER, RECEIVER, TRANSMITTING METHOD, AND RECEIVING METHOD FOR COMMUNICATION SYSTEM - The present invention relates to a transmitting method, a receiving method, a transmitter, and a receiver of a communication system. A transmitting method according to an aspect of the present invention includes generating a burst by scattering a plurality of pilot symbols, and transmitting the burst.06-23-2011
20090141826Digital signal transmitting system, receiving apparatus and receiving method - A 4ASK demodulator (06-04-2009
20110211655METHOD FOR TRANSMITTING SIGNALS IN MULTI-CARRIER RADIO TRANSMISSION SYSTEM - A method for transmitting signals in a multi-carrier radio transmission system is provided, wherein a transmission block is composed of N consecutive OFDM symbols in a time domain and M consecutive physical sub-carriers in a frequency domain, where N is an integer and not less than 1, and M is an integer and not less than 1. The method comprises following steps: a transmitting end encodes and interleaves data; at least one pilot stream exists at the transmitting end, only one pilot signal is transmitted in frequency area for transmission of the pilot signal, and at most one pilot signal is transmitted in each group of OFDM symbols; the transmitting end performs IFFT operation on the encoded and interleaved data and the pilot signal; the transmitting end transmits out the data and the pilot signal through antennae after inserting a preamble signal.09-01-2011
20110211651Precoding for time or frequency correlated MIMO channels - Systems and methods are disclosed to generate a codebook for channel state information by generating a random codebook; partitioning channel state information into a set of nearest neighbors for each codebook entry based on a distance metric; and updating the codebook by finding a centroid for each partition.09-01-2011
20110255632SIGNALING OF MIXTURE COMBINATION SETS - Systems and methods for conveying and determining modulations schemes employed by co-scheduled users are disclosed. In addition, methods and systems for designing signaling schemes that convey such information are also disclosed. In accordance with one method, an index is received and a table of indices in which the received index denotes a plurality of different sets of modulation schemes is referenced. Further, one or more modulation schemes of at least one co-scheduled user is determined based on the referencing. In addition, data signals are received and are processed by utilizing the one or more modulation schemes.10-20-2011
20080253474Method and Apparatus for Signal Processing and Encoding and Decoding Method, and Apparatus Therefor - An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining data coding identification information and decoding data according to a data coding scheme indicated by the data coding identification information. The data coding scheme includes a pilot coding scheme at least, wherein the pilot coding scheme decodes the data using a pilot reference value corresponding to a plurality of the data and a pilot difference value, and wherein the pilot difference value is generated using the data and the pilot reference value.10-16-2008
20080253473CALIBRATION IN A RADIO FREQUENCY TRANSMISSION MODULE - A radio frequency transmission module is adapted to generate a first signal to be transmitted and to convert the signal to a radio frequency carrier for its radio transmission, in an operational phase, and is adapted to generate a second signal and to convert the second signal to the radio frequency carrier, in a calibration phase. The module includes a calibration unit having a subsampler adapted to subsample the second converted signal and a calculation unit adapted to calculate Fourier Transform coefficients representative of the signal delivered by the subsampler, for the purposes of processing the first signal to be transmitted, in the operational phase, as a function of at least some of the Fourier coefficients calculated in the calibration phase.10-16-2008
20110164702POLAR TRANSMITTER - The present application relates to at least one digitally controlled oscillator and a data modulation device. More particularly, the digital polar transmitter comprises at least one digitally controlled oscillator configured to generate at least one frequency. The digital polar transmitter comprises a data modulation device, wherein the data modulation device comprises at least one data input terminal, at least one output terminal, and at least one frequency input terminal, wherein the output terminal is connected to the digitally controlled oscillator. The digital polar transmitter comprises a phase measuring device configured to measure phase information from the output signal of the data modulation device for every frequency sample. The digital polar transmitter comprises a phase error detecting device configured to detect a phase error at least depending on the measured phase information, wherein the phase error detecting device is configured to apply the detected phase error to the output signal of the data modulation device.07-07-2011
20110164701SYSTEMS AND METHODS OF ENCODING USING A REDUCED CODEBOOK WITH ADAPTIVE RESETTING - To feedback MIMO channel conditions, a codeword from a codebook is selected. To reduce signalling, the codewords are organized into codeword subsets. The receiver signals an index of a codeword into a current codeword subset previously made known to the transmitter. The current codeword subset is adaptively selected based on a threshold criterion. For example, if the best codeword from the current codeword subset is not sufficiently similar to the best codeword in the full codebook, a switch in the codeword subset is made.07-07-2011
20110255635DATA TRANSMISSION DEVICE AND METHOD IN A WIRELESS COMMUNICATIONS SYSTEM - The present invention provides a data transmission device and method in a wireless communication system. The device comprises a processor which is connected with the M antennas and which is formed so as to generate data to be transmitted through the M antennas, on the basis of a precoding matrix; the precoding matrix is generated based on a plurality of matrices; and a first matrix, which is one matrix among the plurality of matrices, is selected from within a codebook for N antennas (where N10-20-2011
20100284487WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless transmission method for improving the reception characteristic of a preamble. The wireless transmission method allows the patterns of subcarriers (transmitting antenna Tx11-11-2010
20100284486RECEIVING APPARATUS, TRANSMITTING-RECEIVING APPARATUS, AND TRANSMISSION SYSTEM METHOD THEREFOR - A receiving apparatus receives parallel data signals including a plurality of channels from a transmitting apparatus. The receiving apparatus includes a receiver, a detector, and a switch. The receiver receives the parallel data signals. The detector detects a first skew between channels within the receiving apparatus, and a second skew between channels prior to reception by the receiver. The switch interchanges the plurality of channels of the parallel data signals so as to reduce a total skew as a sum of the first skew and the second skew.11-11-2010
20080232507Method and System for Simultaneous FM Transmission and FM Reception Using a Shared Antenna and an Integrated Local Oscillator Generator - Certain aspects of a method and system for simultaneous FM transmission and FM reception using a shared antenna and an integrated local oscillator generator may be disclosed. In a chip that handles communication of Bluetooth signals and FM signals, a clock signal may be generated at a particular frequency to enable transmission and/or reception of Bluetooth signals. A plurality of signals may be generated via a plurality of direct digital frequency synthesizers (DDFSs), which enable simultaneous transmission of FM signals and reception of FM signals. The plurality of DDFSs may be clocked by the generated clock signal.09-25-2008
20100329385POWER SUPPLY APPARATUS AND POWER SUPPLY METHOD - When transmitting an RF signal for power supply or a pulse signal for data transmission, amplification is made in such a manner that the peak power of the RF signal becomes greater than the peak power of the pulse signal. Thus transmitting the RF signal with the greater peak power enables charging of a capacitor 12-30-2010
20100329384METHOD OF TRANSMITTING A WIDEBAND FRAME - A method of transmitting a wideband frame for a wideband system having backward compatibility with a narrowband system includes configuring a wideband carrier by using a set of base carriers, wherein a bandwidth of the base carriers corresponds to a bandwidth of the narrowband system and any one of center frequencies of the base carriers is the same as a center frequency of the narrowband system, and allocating all or some of guard subcarriers between the two adjacent base carriers to a traffic channel when a center frequency spacing between two adjacent base carriers is an integer multiple of a subcarrier spacing. Accordingly, the method can be used to support backward compatibility with the narrowband system. Further, the method can be equally used when the narrowband system co-exists with the wideband system in a guard band defined in a narrowband of a new system.12-30-2010
20100329382DIGITAL BROADCASTING TRANSMITTER AND RECEIVER, AND METHODS FOR PROCESSING STREAMS THEREOF - A digital broadcast transmitter to transmit a plurality of supplementary data streams is provided, including a multiplexer (MUX) unit which generates a transmission stream by inserting the plurality of supplementary data streams into a normal data stream so that the plurality of supplementary data streams are continuously arranged in an alternating pattern in the normal data stream, and an exciter unit which processes the transmission stream so that the plurality of supplementary data streams are distinguishably arranged in a plurality of areas forming a plurality of transmission units.12-30-2010
20110026636APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND METHOD OF TRANSMITTING AND RECEIVING A SIGNAL - A method of transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method includes receiving the signal of a first frequency band, obtaining, layer-1 information from a preamble of the first time-frequency slicing (TFS) signal frame of the received signal, said layer-1 information including an index of a current radio frequency (RF) channel within time-frequency slicing (TFS) signal frame, and a radio frequency (RF) channel identifier of a first TFS signal frame including a physical layer pipe (PLP) in a super frame of TFS structure, parsing the TFS signal frame using the layer-1 information and obtaining the PLP of the TFS signal frame, and converting the PLP to a service stream.02-03-2011
20110255633Digital Transmitter - An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer.10-20-2011
20110135030Semiconductor device, a parallel interface system and methods thereof - A semiconductor device, a parallel interface system and methods thereof are provided. The example semiconductor device may include a reference clock transmitting block generating a reference clock signal, a plurality of first transceiver blocks, each of the plurality of first transceiver blocks transmitting at least one parallel data bit signal based on one of a plurality of phase-controlled transmitting sampling clock signals and a per-pin deskew block controlling a phase of a transmitting sampling clock signal to generate the phase-controlled sampling clock signals for the respective plurality of transceiver blocks, the per-pin deskew block controlling the phase of each phase-controlled transmitting sampling clock signal based on a phase skew between a given training data bit signal, among a plurality of training data bit signals, corresponding to a given first transceiver block and the reference clock signal in a first operation mode, and based on phase skew information relating to a phase skew between a given parallel data bit signal of the at least one parallel data bit signal and the reference clock signal in a second operation mode. An example method may include reducing skew based on a comparison between a plurality of transmitted training data bit signals and a corresponding plurality of received training data bit signals in a first mode of operation and reducing skew based on received phase skew information relating to a phase skew difference between a reference signal and a parallel data bit signal in a second mode of operation.06-09-2011
20110135033METHOD FOR TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM - A method of sending data in a multiple antenna system includes the steps of generating a transmission signal by applying channel-dependent precoding to a first antenna cluster and a second antenna cluster, each comprising a plurality of antennas, wherein the channel-dependent precoding is performed by a precoding weight matrix in which a precoding weight for each of the antenna clusters has a block diagonal form and the precoding weight is represented by P×V for a number of transmission antennas P, included in each of the antenna clusters, and a number of layers V applied to each of the antenna clusters (P and V are an integer greater than 0) and sending the transmission signal.06-09-2011
20110135031NOVEL PULSE GENERATOR FOR ULTRA-WIDE-BAND MODULATING SYSTEMS AND MODULATING SYSTEMS USING IT - A pulse generator circuit is provided. The pulse generator circuit has an input adapted to receive an input electrical quantity and an output at which an output electrical quantity is made available. A transfer characteristic establishes a relationship between said input and said output electrical quantities. The pulse generator circuit is adapted to provide said output electrical quantity in the form of pulses having a predetermined shape, suitable to be used for UWB transmission. The transfer characteristic has substantially a same shape as that of said pulses. Moreover, a UWB modulating system exploiting the novel pulse generator is proposed.06-09-2011
20120147989INTERLEAVER, INTERLEAVING METHOD, TRANSMISSION APPARATUS, AND TRANSMITTING METHOD - Soft decision sections provisionally decide each modulated signal separated using an inverse matrix calculation of a channel fluctuation matrix at separation section. Signal point reduction sections reduce candidate signal points of a multiplexed modulated signal using the provisional decision results. Soft decision sections make a correct decision using the reduced candidate signal points and obtain received data of each modulated signal. This allows received data RA, RB with a good error rate characteristic to be obtained with a relatively small number of calculations without reducing data transmission efficiency.06-14-2012
20120147986METHOD AND APPARATUS FOR EVALUATING AND OPTIMIZING A SIGNALING SYSTEM - A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive circuit and used as a reference. The receive circuit compares the patterns. Any differences between the patterns are observable. In one embodiment, a linear feedback shift register (LFSR) is implemented to produce patterns. An embodiment of the present disclosure may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the present disclosure may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously.06-14-2012
20100322341CODE BOOKS FOR MULTIPLE-INPUT AND MULTIPLE-OUTPUT COMMUNICATION SYSTEMS - A method and device for transmitting and receiving data. A device comprises a code book and a transmitter. The code book comprises a plurality of codewords, wherein the plurality of codewords correspond to a plurality of vectors having a largest minimum chordal distance with respect to the plurality of vectors. The transmitter is configured to send a number of wireless signals using the code book. A receiver receives and decodes the number of wireless signals.12-23-2010
20110135032DIGITAL TRANSMITTER - An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer.06-09-2011
20110080975MIMO TRANSMITTING APPARATUS, MIMO RECEIVING APPARATUS, MIMO TRANSMISSION SIGNAL FORMATION METHOD, AND MIMO TRANSMISSION SIGNAL SEPARATION METHOD - Provided are a MIMO transmitting apparatus, a MIMO receiving apparatus, a MIMO transmission signal formation method, and a MIMO transmission signal separation method that improve a transmission efficiency. In a MIMO communication apparatus (04-07-2011
20110096869SIGNAL CONVERTER, WIRELESS SIGNAL TRANSMISSION SYSTEM, AND WIRELESS SIGNAL RECEPTION SYSTEM - A signal converter 04-28-2011
20110096866APPARATUS, AND ASSOCIATED METHOD, FOR COMMUNICATING A DATA BLOCK IN A MULTI CARRIER MODULATION COMMUNICATION SCHEME TOGETHER WITH AN IDENTIFICATION SEQUENCE SUPERIMPOSED THEREON - Apparatus, and an associated method, for facilitating communication of a data block communicated in an OFDM-based, communication system. Side-information required to be transmitted by many PAPR reduction schemes in OFDM is carried and transmitted by sending orthogonal binary sequences superimposed on the OFDM data sequence carrying the information to be transmitted. In one embodiment, a selected scrambling sequence is multiplied with an input data block to yield a desired Peak-To-Average Power Ratio. An identification sequence one-to-one corresponding to the scrambling sequence is superimposed on the resultant sequence and transmitted together. In the receiving station, the identification sequence is determined through correlation operations. This also determines the scrambling sequence. The effects of both sequences are finally removed from the information-carrying data sequence.04-28-2011
20110096862RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - Even when a CCFI error has arisen, there is prevented occurrence of a packet error, which would otherwise be caused during the first receiving operation for reasons of erroneous storage of data into a buffer, and data are prevented from being synthesized while deviated during retransmission. A transmission Circular Buffer sequentially reads encode word data to be transmitted in reverse order from end to top like D04-28-2011
20110096868TRANSMISSION OF A PIECE OF MULTIMEDIA CONTENT ACROSS A NETWORK TO A TELECOMMUNICATION TERMINAL - A method is provided for transmitting at least one piece of multimedia content to at least one telecommunication terminal, comprising: a step of sending, by a transmitting device, a request to establish a communication link-up between the transmitting device and the terminal, said sending step being carried out after an instance of one event from a predetermined set of events, said terminal to be notified of said request; and a step of transmitting said piece of multimedia content across said link-up in the form of a telephone and/or television flow, said stage of transmission to be carried out after detecting the actual establishment of said link-up.04-28-2011
20110096863WIRELESS TRANSMITTER FOR HIGH MOBILITY AND HIGH THROUGHPUT AND MODE CONTROL METHOD THEREOF - A wireless transmitter which performs reconfiguration for high mobility and high throughput includes: an operation mode decision unit configured to decide an operation mode depending on mobility, a required data rate, and wireless link performance; a clock generation unit configured to generate a plurality of clock signals; a selection unit configured to select necessary clock signals among the plurality of clock signals generated by the clock generation unit according to the operation mode decided by the operation mode decision unit; and at least one or more digital modulation units configured to modulate transmitted data by adjusting a signal bandwidth of a frequency domain and a transmission time of a time domain using the clock signals selected by the selection unit.04-28-2011
20110096865Digital predistortion transmitter - There is a need for effectively compensating distortion when a predistortion transmitter is subject to not only a memory effect due to nonlinearity of an amplifier, but also a modulator's DC offset, IQ unbalance, or local quadrature error. A predistortor to be used is a polynomial predistortor including a polynomial basis generation portion and an inner product calculation portion. The polynomial basis generation portion delays a real part and an imaginary part of a complex input signal Sx=Ix+jQx for up to M samples to generate 2(M+1) signals, duplicately combines these signals to generate monomials having maximum degree N, and outputs, as a basis vector, all or part of the monomials depending or needs. The inner product calculation portion performs an inner product calculation using a coefficient vector, i.e., a set of complex numbers sized equally to the basis vector to find a polynomial value and outputs the value as a complex signal.04-28-2011
20110096864PROGRAMMABLE DIGITAL CLOCK CONTROL SCHEME TO MINIMIZE SPUR EFFECT ON A RECEIVER - A device includes an analog front end for receiving a radio frequency (RF) signal. The analog front end contains a local oscillator that is tuned to a local oscillation frequency for down-converting the received RF signal to a first intermediate frequency (IF) signal. An analog-to-digital converter module converts the first IF signal to a digital baseband signal. The device also includes a digital processing unit for processing the baseband signal. The digital processing unit generates multiple clock signals from a reference oscillator having digitally adjustable reference frequency. The reference frequency and the multiple clock signals may interfere with the local oscillator and generate several frequency spurs that may fall within the bandwidth of the received RF signal. In a preferred embodiment, the digital processing unit adjusts the reference frequency by a certain amount so that the spurs do not fall within the RF signal bandwidth.04-28-2011
20100215117Data transmission in telecommunications networks - A method of mapping a plurality of symbols from a first communication scheme (e.g. GSM) to frames of a second communication scheme (e.g. CPRI) to enable data of the symbols to be transmitted over a communication link that operates according to the second communication scheme, wherein N of the symbols are transmitted in a sequence n=0, . . . ,n-1 and X of the frames are transmitted in a sequence x=o, . . . ,x-1, the method including transmitting data of the symbol n during a frame x, where x is dependent upon the value08-26-2010
20110200137APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION REFERENCE SYMBOL IN RELAY NETWORK SYSTEM - An apparatus and method for transmitting/receiving a Channel State Information-Reference Symbol (CSI-RS) in a relay network system are provided. The method for transmitting a CSI-RS in a relay network system includes selecting a subframe to transmit a CSI-RS, from DownLink (DL) subframes, transmitting, to a receive end, identifying information indicating that a CSI-RS is transmitted at the selected subframe, and transmitting a CSI-RS at the selected subframe.08-18-2011
20100166106DISCRETE FOURIER TRANSFORM PROCESSING APPARATUS AND RADIO COMMUNICATION APPARATUS - An arithmetic processing apparatus includes a shift section configured to shift, by (N+1)/2 bit data, a data signal x(n) (n=0, . . . , N−1), which has a data length of N, where N is an odd number, and which has left-right symmetry with respect to ((N−1)/2)th bit data, so as to obtain a data signal x′(n), and an arithmetic operation section configured to obtain a data signal X(k) (k=0, . . . , N−1) by performing a discrete Fourier transform operation on the data signal x′(n).07-01-2010
20100166102WINDOWED ORTHOGONAL DIVISION MULTIPLEXING FOR SPECTRUM AGILE RADIOS - A method of transmitting data includes modulating data onto a plurality of frequency carriers to produce a plurality of mutually orthogonal modulated frequency signals. The mutually orthogonal modulated frequency signals are then combined into an orthogonal frequency division multiplex signal, which in turn is windowed by a transmission windowing function to produce a windowed orthogonal frequency division multiplex signal. The windowed orthogonal frequency division multiplex signal is transmitted. The windowed orthogonal frequency division multiplex signal includes a first set of the frequency carriers uniformly spaced apart from each other in frequency by a spacing Δf, and a second set of the frequency carriers from each other in frequency by the same spacing Δf, and there is a notch of at least 2Δf between the first set of frequency carriers and the second set of frequency carriers.07-01-2010
20100166104UWB DUAL BURST TRANSMIT DRIVER - A dual burst transmitter for ultra-wideband (UWB) communication systems generates a pair of precisely spaced RF bursts from a single trigger event. An input trigger pulse produces two oscillator trigger pulses, an initial pulse and a delayed pulse, in a dual trigger generator. The two oscillator trigger pulses drive a gated RF burst (power output) oscillator. A bias driver circuit gates the RF output oscillator on and off and sets the RF burst packet width. The bias driver also level shifts the drive signal to the level that is required for the RF output device.07-01-2010
20100166108DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcasting system and a data processing method are disclosed. The digital broadcast receiving system includes a baseband processor, a management processor, and a presentation processor. The baseband processor receives a broadcast signal including mobile service data and main service data. Herein, the mobile service data configure a Reed-Solomon (RS) frame, and the RS frame includes mobile service data and at least one channel configuration information on the mobile service data. The management processor acquires simple guide information on at least one of a current program and a next program of a corresponding channel from the channel configuration information and stores the acquired simple guide information. The presentation processor receives simple guide information of any one of the current program and the next program, wherein the programs are provided as mobile service through a user-selected channel, from the management processor and displays the received simple guide information on a portion of a display screen of the corresponding channel.07-01-2010
20100195759UPLINK OPEN-LOOP SPATIAL MULTIPLEXING IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate cycling through precoders for transmitting wireless network communications in a time domain. The precoders can be cycled according to a precoder sequence for each data symbol transmission. When the last precoder is selected the cycle can begin again, a new precoder sequence can be received or defined, and/or the like. A precoder sequence related to a subset of precoders present in a wireless device can be defined sequentially, cyclically shifted according to an identifier or one or more communications parameters, randomly, pseudo-randomly according to an identifier or one or more communications parameters, and/or the like. In addition, the precoder sequence can be utilized to select a precoder for one or more retransmissions. Such cycling of precoders can increase transmit diversity.08-05-2010
20100195758DIGITAL VIDEO BROADCASTING-CABLE SYSTEM AND METHOD FOR PROCESSING RESERVED TONE - A Digital Video Broadcasting-Cable (DVB-C) system and a processing method for reserved tones are provided. A transmitter determines a position of broadcast data and a position of reserved tones in a frame and sends a broadcast signal into which the broadcast data and the reserved tones are inserted. A receiver determines the position of reserved tones in a received broadcast signal and extracts broadcast data from the broadcast signal in consideration of the determined position of the reserved tones. The system and method may compensate for the peak power of broadcast data to be transmitted through a multi-channel bundle, by inserting reserved tones into the whole multi-channel bundle with combined channel bands. This may reduce the Peak to Average Power Ratio (PAPR) of broadcast signals in the DVB-C system and thereby improve the performance of the DVB-C system while still adopting Orthogonal Frequency Division Multiplexing (OFDM).08-05-2010
20100195756REDUCED WIRING REQUIREMENTS WITH SIGNAL SLOPE MANIPULATION - An information handling system device includes a plurality of electronic components; an electric circuit including at least one trace for connecting two or more of the plurality of electronic components and transmitting data between the plurality of electronic components via at least one electric signal; and a substrate including an insulating material for serving as a base for the electric circuit and the plurality of electronic components, wherein the at least one electric signal transmitted between the plurality of electronic components is transmitted utilizing slope manipulation to provide a slope directly proportional to a data value.08-05-2010
20100067615Method for Optimizing Signals with Multiple Subcarriers - The invention relates to a method for coding data in a transmitted signal, wherein the transmitted signal comprises multiple subcarriers with orthogonal frequencies, the method comprising the step of modulating the signals corresponding to a given subset of the subcarriers of the transmitted signal in order to encode information and the step of modulating the signal corresponding to least one reserved subcarrier depending on at least one optimization criterion relating to a quality of the overall transmitted signal. In order to enhance the quality of the transmitted signal, the optimization criterion depends on at least one first quantity relating to a peak-to-average-power ratio of the transmitted signal and on at least one second quantity relating to an out-of-band power of the transmitted signal.03-18-2010
20100067616METHOD OF TRANSMITTING CONTROL INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting control information in a multiple antenna system includes obtaining a channel quality indicator (CQI) of a first layer, obtaining a differential value between a CQI of a second layer and the CQI of the first layer, transmitting the CQI of the first layer, and transmitting the differential value.03-18-2010
20100067614SERVICE IN COMMUNICATION SYSTEMS - A method and apparatus for improving performance in communication systems is provided. In one implementation received encoded data is decoded using an inner rateless decoder to produce a series of decoded rateless outputs. The series of decoded rateless outputs is combined to produce a block, and the block is decoded using an outer block decoder. In another implementation, encoded data for a data block encoded with a rateless code is received. It is determined that an initial amount of mutual information for the data block has been received, the initial amount being an amount expected to allow decoding of the received encoded data. Additional encoded data for the data block is received. It is determined that an extra amount of mutual information for the data block has been received beyond said initial amount of mutual information.03-18-2010
20100067613METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL, AND METHOD AND APPARATUS FOR GENERATING UPLINK SIGNAL IN COMMUNICATION SYSTEM - When a terminal generates an uplink signal in a communication system, the terminal hops a sequence for differentiating itself from another terminal with time. The terminal generates the uplink signal by multiplying a transmission symbol by a sequence of a transmission time corresponding to the transmission symbol.03-18-2010
20110261898MULTIPLE-INPUT MULTIPLE-OUTPUT OFDM SYSTEMS - Disclosed is a method of processing a series of data bits for transmission on a transmit link, the method comprising mapping the series of data bits to a series of data symbols; demultiplexing the series of data symbols to a plurality of substreams of symbols; modulating each substream of symbols to a corresponding series of OFDM symbols; and space precoding the plurality of series of OFDM symbols to form one or more series of space precoded OFDM symbols, wherein the demultiplexing is dependent on channel state information for the transmit link.10-27-2011
20110261901TRANSMISSION METHOD AND TRANSMISSION APPARATUS - Of any one of transmission method X of transmitting modulated signal A and modulated signal B including the same data from a plurality of antennas and transmission method Y of transmitting modulated signal A and modulated signal B having different data from the plurality of antennas, base station apparatus 10-27-2011
20110051841METHOD FOR RECEIVING CONTROL INFORMATION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM OF MOBILE COMMUNICATION SYSTEM - The present invention relates to receiving control information in an orthogonal frequency division multiplexing (OFDM) system of a mobile communication system. The present invention includes receiving information related to a number of OFDM symbols in a subframe for receiving first control information, receiving information related to a number of OFDM symbols in the subframe for receiving second control information, decoding the first control information according to the received information related to the number of OFDM symbols in the subframe for receiving the first control information, and decoding the second control information according to the received information related to the number of OFDM symbols in the subframe for receiving the second control information, wherein the number of OFDM symbols for receiving the first control information is less than or equal to the number of OFDM symbols for receiving the second control information.03-03-2011
20110051840Methods, Apparatuses, System, and Related Computer Program Product for Information Transmission - Disclosed is a method including generating information to be transmitted, first transmitting, in a first transmission opportunity of n consecutive transmission opportunities, n being an integer greater than 1, the generated information once, and second transmitting, in one transmission opportunity different from the first transmission opportunity, the generated information a number of times different from once; and a method including first receiving, in the first transmission opportunity of the n consecutive transmission opportunities the information once, and second receiving, in the one transmission opportunity different from the first transmission opportunity, the information the number of times different from once.03-03-2011
20110051839DESTUFF CIRCUIT AND TRANSMISSION DEVICE - In a destuff circuit, after invalid data included in each data signal assigned to a plurality of lanes in a stuff shifter is collected to one side within the same column, then in a data rotator the number of stuffs of the respective data signals of each column is detected, and the data of the respective columns are operated to rotate in one direction, according to the detection results. Then, effective data included in the data signal of each lane that has been rotated is stored in FIFO, to thereby output signals for which ineffective data has been removed and only effective data has been extracted. As a result, it becomes possible to perform destuffing processing for parallel data signals with simple logical circuits at high speed.03-03-2011
20110188602PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data and pilot symbols in an OFDM transmission system having transmission antennas. The device includes symbol generating means for generating data said pilot symbols, means for transmitting the data and pilot symbols using subcarriers of the OFDM system. The symbol generating means generates a first and second type pilot symbol, the second having an inverted value of the first so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna. First and second pilot symbols are comprised in respective first and second pilot symbol patterns, where at least some of the first and second pilot symbols have the same time allocation and being alternately identical and inverted to each other.08-04-2011
20110188601APPARATUS FOR GENERATING FREQUENCY SIGNAL - A frequency signal generator includes a controller for generating a frequency generation signal, a reference frequency signal generator for generating a first frequency signal and generate a second frequency signal by dividing a first frequency signal from the controller, an assistance frequency signal generator adapted to generate a third, fourth, and fifth frequency signals and to output a sixth frequency signal in response to an assistance frequency select signal, a mixer for selecting a sign of the sixth frequency signal in response to a sign select signal and generating a seventh frequency signal and a eighth frequency signal by mixing the sixth frequency signal of the selected sign and the first frequency signal, a switch adapted to output the seventh or eighth frequency signal in response to a dividing select signal, and a first divider outputting a ninth frequency signal by dividing the eighth frequency signal from the switch.08-04-2011
20090175377DIGITAL SIGNAL TRANSMITTING APPARATUS - A digital signal transmitting apparatus that prevents occurrences of highness and lowness in error tolerance due to bit positions without raising the redundancy and without retransmittal. In the digital signal transmitting apparatus, a bit interchanging part (07-09-2009
20100020898Adjustable Dual-Band Link - A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a baseband circuit and at least a passband circuit. The baseband circuit corresponds to a baseband sub-channel and the passband circuit corresponds to a passband sub-channel. The first communication link circuit also includes a circuit that distributes a first subset of a data stream having a first symbol rate to the baseband circuit and a second subset of the data stream having a second symbol rate to the passband circuit. The baseband sub-channel and the passband sub-channel are separated by an adjacent guardband of frequencies. The passband carrier frequency is adjusted to define the guardband and the guardband corresponds to a first notch in a channel response of a first communications channel.01-28-2010
20100020897SYSTEM AND METHOD FOR REDUCING PEAK-TO-AVERAGE POWER RATIO FOR MULTI-CARRIER COMMUNICATION SYSTEMS - The present disclosure presents a predictive signal producing method that effectively levels transmitter output power in a multi-carrier communication system and results in approaching amplifier performance normally associated with constant carrier waveforms. Embodiments of the disclosed solution offers >10 dB reduction in the peak-to-average power required to support the transmission of, for example, orthogonal frequency division modulation (“OFDM”) modulation techniques. Embodiments of the novel system and method maximize peak-to-average power ratio (“PAPR”) reduction with selective mapping and soft clipping, which may include filtering, combined. This novel approach also minimizes overhead, bit error rate, retransmissions, and increases latency as well as implementing processing cycles with a number of iterations. The disclosed system and method improves the total system DC power efficiency and provides an optimal solution for PAPR reduction in multi-carrier communication systems such as, for example, OFDM.01-28-2010
20100020894METHOD FOR GENERATING CODEWORD IN WIRELESS COMMUNICATION SYSTEM - A method for generating a codeword that is insensitive to variations of a channel and easily extensible is provided. The method includes obtaining a primary unit by taking a row vector from an N(E(N−1) simplex code and mapping a control signal to the codeword. The simplex code is obtained by removing a first row from an N(ENorthogonal matrix. The codeword is obtained by combining a plurality of primary units.01-28-2010
20100020895METHOD AND DEVICE FOR REDUCING SIGNAL PEAK VALUE AND TRANSMITTING DEVICE - A method and a device for reducing a signal peak value are adapted to solve a problem that overall performance of a system is significantly degraded caused by allocating a same weight to each sub-carrier so as to averagely distribute a peak clipping noise to each sub-carrier. The method includes: receiving a signal (01-28-2010
20110216850MOBILE STATION - A mobile station configured to perform MIMO communication is disclosed, where the mobile station includes a control unit configured to determine a radio access scheme to be applied, based on at least one of a transmission frequency bandwidth to be used and a transmission stream number used in the MIMO communication.09-08-2011
20110216848WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part (09-08-2011
20110216847SIGNAL PROCESSING ARRANGEMENT AND METHOD WITH ADAPTABLE SIGNAL REPRODUCTION RATE - A signal data source, such as a video or audio decoder (09-08-2011
20110216846METHOD AND USER EQUIPMENT FOR TRANSMITTING PRECODING MATRIX INFORMATION, AND METHOD AND BASE STATION FOR CONFIGURING PRECODING MATRIX - An apparatus and method for a precoding matrix are disclosed. A codebook used for selecting a precoding matrix is comprised of m subgroups each including n precoding matrices. A user equipment indicates a specific precoding matrix selected from the codebook by transmitting to a base station a first codebook index indicating one of the m subgroups and a second codebook index indicating one of n precoding matrices in a subgroup. The base station configures the specific precoding matrix from the codebook based on the first and second codebook indexes.09-08-2011
20120147987METHOD AND APPARATUS FOR DATA TRANSMISSION USING MULTIPLE TRANSMIT ANTENNAS - A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MSLE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.06-14-2012
20100195757Apparatus and method of differential IQ frequency up-conversion - A balanced transmitter up-converts I and Q baseband signals directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the I and Q baseband signals in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the I and Q baseband signals. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal. A bandpass filter can then be utilized to select the desired harmonic of interest from the harmonically rich signal.08-05-2010
20110019762INFORMATION TRANSMISSION SYSTEM, INFORMATION TRANSMISSION DEVICE, INFORMATION TRANSMISSION METHOD, AND COMPUTER READABLE MEDIUM STORING A PROGRAM FOR INFORMATION TRANSMISSION - The present invention provides a information transmission device including: a transmission section that transmits information to a first transmission path that transmit information serially; a reception section that receives information from a second transmission path; a waveform shaping section that, according to setting information, shapes at least one of a signal waveform of the information for transmission, and/or a signal waveform of the information for reception; and a controller that, when establishing communication, controls the transmission section to transmit predetermined first information that requests communication establishment, and effects control to change the first setting information and controls the transmission section to re-transmit the first setting information when the reception section has not received the first information within an interval that from the beginning of transmission of the first information until a predetermined duration required for communication establishment has elapsed.01-27-2011
20120307936TRANSMITTING APPARATUS, TRANSMITTING METHOD, RECEIVING APPARATUS, AND RECEIVING METHOD - Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S12-06-2012
20120307933ENERGY EFFICIENT CONSTELLATION METHOD AND SYSTEM - A method and apparatus employing statistical physics energy minimization methods to signal constellation design. By using statistical physics concepts, an energy-efficient signal constellation design algorithm (EE-SCDA) is described. In the presence of amplified spontaneous emission (ASE) noise and channel impairments, we use EE-SCDA to determine a source distribution, and represent the signal constellation design as a center of mass problem. Furthermore a discrete-time implementation of D-dimensional transceiver as well as corresponding EE polarization-division multiplexed (PDM) system is described.12-06-2012
20120307931Multi-Mode Driver with Multiple Transmitter Types and Method Therefor - A multi-mode driver with multiple transmitter types including a first transmitter coupled to a transmission channel and operative to output a signal for transmission on the channel and a second transmitter coupled to the channel and operative to output the signal for transmission on the channel, the second transmitter having at least one different output characteristic than the first transmitter. During the output of the signal from one of the transmitters, the other of the transmitters is biased with a bias supply voltage that prevents voltage breakdown of one or more transistors of the other transmitter.12-06-2012
20120307932DELTA MODULATED LOW POWER EHF COMMUNICATION LINK - A system for communicating modulated EHF signals may include a modulation circuit responsive to a bi-level transmit information signal for generating a transmit output signal. The transmit output signal may have an EHF frequency when the transmit information signal is at a first information state and may be suppressed when the transmit information signal is at a second information state. A transmit transducer operatively coupled to the modulation circuit may be responsive to the transmit output signal for converting the transmit output signal into an electromagnetic signal.12-06-2012
20120307934Quality of Service and Rate Selection - Adjusting a Modulation and Coding Scheme (MCS) or more generally, Layer One parameters, for a data packet based on packet information and priority is disclosed. The packet information can typically be extracted from the packet's header. Considering packet-specific information enables cross-layer optimization that can include consideration of packet error rate (PER) constraints, delay constraints, relative importance of packets within a data stream, beamforming (e.g., off or on, implicit or explicit—longer distances are more likely to merit implicit beamforming) constraints, and aggregation as a function of MCS or channel condition (more aggregation is generally desirable for higher MCS or better channels), to name several examples. It is also possible to differentiate drop probability based on the importance of frames like anchor frames, etc.12-06-2012
20120147990EXTENDED NON-RETURN-TO-ZERO SERIAL CHANNEL SIGNALING - Methods and apparatus for serial channel operation are disclosed. An N+1-level signaling scheme is used to transmit N staggered but overlapping NRZ sub-sequences concurrently on a serial channel. Each sequence has a bit rate R and an essential bandwidth of R Hz. The combined bit rate of the channel is N×R, but due to a lack of correlation between the sub-sequences, the essential bandwidth remains approximately R Hz. The signaling scheme also contains redundancy that allows some errors to be detected and/or corrected. Other embodiments are also described and claimed.06-14-2012
20120147988ENCODING MODULE, APPARATUS AND METHOD FOR DETERMINING A POSITION OF A DATA BIT WITHIN AN INTERLEAVED DATA STREAM - An encoding module comprises an inverse interleaving module arranged to: determine an initial location index within an interleaving matrix for a data bit; and perform bit reverse ordering (BRO) on a column index value for the initial location index for the data bit to obtain a BRO column index value for the data bit. The inverse interleaving module is further arranged to calculate a number of valid interleaving matrix addresses preceding a location index for the data bit following bit reverse ordering; and determine a position of the data bit within the interleaved data stream based on the calculated number of valid addresses.06-14-2012
20110116572METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTIPLE ANTENNA SYSTEM - A method and an apparatus for transmitting a reference signal in a multiple antenna system are provided. The method includes transmitting a common reference signal through N antennas (N05-19-2011
20110305297Method and System for Encoding a Signal for Wireless Communications - Method and system encodes a signal according to a code rate that includes a ratio of uncoded bits to coded bits. An outer Reed-Solomon encoder encodes the signal into codewords. An interleaver converts the codewords into bits of frames for wireless transmission. An inner encoder executes a convolutional code to generate an encoded signal. The encoded signal is transmitted over a plurality of subcarriers associated with a wide bandwidth channel. The convolutional code is punctured and code states are added by the inner encoder to improve the code rate.12-15-2011
20110305294INFORMATION PROCESSING APPARATUS, WIRELESS TERMINAL, INFORMATION PROCESSING PROGRAM, AND WIRELESS TERMINAL PROGRAM - A management server (12-15-2011
20110142163APPARATUS AND METHOD FOR MAPPING SYMBOL - In a symbol mapping method, transmission data is encoded to output information bits and redundancy bits. The information bits and the redundancy bits are mapped to a symbol according to a first mapping scheme at a first transmission, and the information bits and the redundancy bits are mapped to a symbol according to a second mapping scheme at a second transmission.06-16-2011
20110069779PREAMBLE METHODS AND TECHNIQUES - A method and system for a method of transmitting data within a signal frame. The method comprises inserting a first synchronization preamble into a first location within the signal frame and inserting a second synchronization preamble into a second location within the signal frame, wherein the first synchronization preamble conveys information indicative of the second location. The method further comprises issuing the signal frame towards a receiving device in a wireless communication environment.03-24-2011
20100260287WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless transmission device of the present invention includes n (where n is an integer of two or more) transmission antennas and a delay imparting section for delaying transmission signals supplied to the n transmission antennas by a maximum delay time (n−1)T or less based on a delay time T dependent upon a communication signal, which indicates whether to transmit the transmission signals by way of frequency diversity or multiuser diversity.10-14-2010
20120039414USING QUANTIZED PREDICTION MEMORY DURING FAST RECOVERY CODING - A method for quantizing prediction memory during fast recovery coding is disclosed. A best shape vector that describes prediction memory for a current frame is quantized. It is determined whether to send the quantized best shape vector. The quantized best shape vector is sent based on the determination. An encoded current frame is sent.02-16-2012
20110075758APPARATUS FOR TRANSMITTING LAYERED DATA - A transmission apparatus, including: a first encoding unit to encode first layer data based on a first encoding scheme and generate first encoded data; a second encoding unit to encode both the first encoded data and second layer data based on a second encoding scheme and generate second encoded data; and a transmission unit to transmit the second encoded data to a receiving apparatus.03-31-2011
20120099670COMMUNICATIONS SYSTEM SUPPORTING MULTIPLE SECTOR SIZES - In one embodiment, a configurable communications system accommodates a plurality of different transmission word sizes. In a transmit path, the system inserts a number of padding bits corresponding to missing user-data bits onto the end of an input data sequence to generate a set of data having N bits. The N bits are interleaved and error-correction (EC) encoded to generate parity bits corresponding to an EC codeword. The parity bits are de-interleaved and multiplexed with the input data stream to generate a transmission word. In a receive path, a channel detector recovers channel values corresponding to the transmission word. Padding values, corresponding to the missing-bit locations, are inserted among the channel values. The resulting channel values are interleaved and EC decoded to recover the EC codeword. The data bits of the codeword are de-interleaved, and the padding bits corresponding to the missing channel values are discarded.04-26-2012
20110096861LOW COMPLEXITY METHOD AND APPARATUS TO APPEND A CYCLIC EXTENSION TO A CONTINUOUS PHASE MODULATION (CPM) SIGNAL - The present invention provides a new and unique method and apparatus for cyclically extending a continuous phase modulation (CPM) block, which features transmitting each information symbol and its antipodal counterpart in any order within a data portion of the continuous phase modulation block. The continuous phase modulation block includes a sequence of N/2 M-ary information symbols that are spread over N symbol intervals, and the cyclic extension includes the first G M-ary symbols sent in the data portion of the block being appended to the continuous phase modulation block.04-28-2011
20120250781DYNAMICALLY ADJUSTED A/D RESOLUTION - A process variable transmitter is used to measure a process variable, and, in doing so, dynamically changes the resolution of the A/D converter based upon the measured value of the analog input signal. This can be done by automatically adjusting the configurable resolution gain adjustment based on the value of the analog signal being measured, by normalizing the input signal being measured so that it is centered in an optimal resolution window of the A/D converter, or by adjusting a voltage reference provided to the A/D converter.10-04-2012
20110170627METHOD FOR GENERATING PREAMBLE IN MULTI-USER MULTI-INPUT MULTI-OUTPUT SYSTEM, AND DATA TRANSMISSION APPARATUS AND USER TERMINAL USING THE METHOD - Provided are a method for generating a preamble included in a frame of a Multi-User Multi-Input Multi-Output (MU-MIMO) system, and a data transmission apparatus and terminal in which the method is adopted. The data transmission apparatus may enable at least one Very High Throughput-Long Training Field (VHT-LTF) sequence to be included in at least one Space Time Stream (STS) transmitted to at least one terminal, and transmits the at least one VHT-LTF sequence. The at least one VHT-LTF sequence may have the same length as another VHT-LTF sequence simultaneously transmitted.07-14-2011
20110158344IN-MILLIMETER-WAVE DIELECTRIC TRANSMISSION DEVICE AND METHOD FOR MANUFACTURING SAME, AND WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - An electronic device provided with a plurality of circuit boards uses a support member for supporting the circuit boards as the transmission path of a wireless signal. For example, the electronic device is provided with a first printed circuit board for processing a millimeter-wave signal, a second printed circuit board which is signal-coupled to the printed circuit board and receives the millimeter-wave signal to subject the received signal to signal processing, and a waveguide which is disposed with a predetermined dielectric constant between the printed circuit boards, wherein the waveguide constitutes the dielectric transmission path, and the waveguide supports the printed circuit boards. This configuration makes it possible to receive the electromagnetic wave based on a millimeter-wave signal radiated from one end of the waveguide constituting the dielectric transmission path, at the other end thereof.06-30-2011
20110090987APPARATUS FOR TRANSMISSION AND RECEPTION WITH TRANSMIT DIVERSITY USING CYCLIC SUBCARRIER SHIFT - Provided is a technology adopting multiple transmit antennas in a radio communication system. In a mobile communication system of a signal carrier frequency division multiple access (SC-FDMA) scheme, it is possible to transmit data using the multiple transmit antennas, while maintaining a peak to average power ratio (PAPR) to be low. Also, it is possible to provide a new transmit diversity transmission even in a general radio communication system including an orthogonal frequency division multiple access (OFDMA), a code division multiple access (CDMA) scheme, and the like.04-21-2011
20110090986METHOD FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - A data transmission method in a wireless communication system is provided. The method includes allocating a plurality of pilot resources for supporting pilot transmission through a plurality of antennas, and if there are residue pilot resources not used in the pilot transmission among the plurality of pilot resources, transmitting data by using the residue pilot resources.04-21-2011
20110090985Method, Codebook, and Base Station for Precoding - A method, a codebook, and a Base Station (BS) for precoding are provided. The precoding method includes: obtaining a total uplink power of a User Equipment (UE); if the total uplink power is greater than ¾ of a rated total transmit power of antennas, selecting a codeword from a first codebook with imbalanced power between layers; otherwise, selecting a codeword from the first codebook and a second codebook with balanced power between layers, so as for precoding data to be transmitted according to the selected codeword. Thus, a loss of an antenna performance at a high signal-to-noise ratio is reduced, and the loss of the power amplification of the antenna is reduced if the transmit power of the antenna is restricted.04-21-2011
20110090984SYSTEMS AND METHODS FOR PROVIDING ATC OVERLAY PROTOCOLS - An embodiment of the present invention sets forth a method for modulating a signal to include broadcast data, modulating the signal to include an overlay message comprising an address and data for an intended recipient, and transmitting the modulated signal including both the broadcast data and the overlay message including the address and data for the intended recipient. Another embodiment of the present invention sets forth a method for modulating a plurality of signal transmissions to include broadcast data, modulating the plurality of signal transmissions with an overlay message wherein the overlay message comprises a respective plurality of data segments, and transmitting the plurality of signal transmissions including both the broadcast data and the overlay message including the respective plurality of data segments. Further embodiments of the present invention set forth additional methods and related systems.04-21-2011
20110317784DIVISION OF BIT STREAMS TO PRODUCE SPATIAL PATHS FOR MULTICARRIER TRANSMISSION - A device for bit-demultiplexing in a multicarrier MIMO communication system (e.g. precoded spatial multiplexing MIMO communication systems using adaptive OFDM), including a multicarrier MIMO transmitter and a multicarrier MIMO receiver. The multicarrier MIMO transmitter includes a demultiplexer and symbol mapper unit receiving an input bit stream and generating a plurality of symbol streams, each symbol stream being associated with a different transmission channel and including a plurality of data symbols, each data symbol being attributed to a different carrier; one or more multicarrier modulators generating at least two multicarrier modulated signals based on the symbol streams; and at least two transmit ports respectively transmitting the at least two multicarrier modulated signals, wherein a data throughput rate of each transmission channel is separately variable.12-29-2011
20110317785PILOT PATTERNS FOR OFDM SYSTEMS WITH MULTIPLE ANTENNAS - The present invention relates to orthogonal frequency-division multiplexing (OFDM) communication systems with multiple transmit antennas receive antennas, and in particular to methods for inserting scattered pilots (SPs) into the transmit signals of such OFDM systems, for estimating channel properties on the basis of the scattered pilots, a multi-antenna OFDM transmitter, and an OFDM receiver. In this context, it is the particular approach of the present invention to keep the same SP pattern like in the single-transmitter case, to partition the pilots into as many subsets as there are transmitters (transmit antennas), and to interleave these subsets both in time and in frequency. In this manner, the granularity of pilots of the same subset is reduced. This offers increased flexibility in designing the scattered pilot patterns and greater accuracy of the estimated channel properties.12-29-2011
20110317783SYSTEM AND METHOD FOR DATA SCRAMBLING TO REDUCE THE CREST FACTOR IN AN OFDM WAVEFORM - A method is provided for reducing the peak power level in a combination of orthogonal frequency division multiplexed (OFDM) tones. The method is particularly effective when the information to be communicated is digital data consisting of long patterns of “12-29-2011
20120114069PILOT PATTERN FOR OBSERVATION SCALAR MIMO-OFDM - In an embodiment, a transmitter includes first and second transmission paths. The first transmission path is configurable to generate first pilot clusters each including a respective first pilot subsymbol in a first cluster position, and the second transmission path is configurable to generate second pilot clusters each including a respective second pilot subsymbol in a second cluster position such that a vector formed by the first pilot subsymbols is orthogonal to a vector formed by the second pilot subsymbols. For example, where such a transmitter transmits simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) over respective channels that may impart inter-carrier interference (ICI) to the signals due to Doppler spread, the pattern of the pilot symbols that compose the pilot clusters may allow a receiver of these signals to use a recursive algorithm, such as a Vector State Scalar Observation (VSSO) Kalman algorithm, to estimate the responses of these channels.05-10-2012
20100020896SCALED AND ROTATED ALAMOUTI CODING - The present invention relates to an encoder for encoding incoming symbols of an incoming data stream into channel symbols of a channel data stream for transmission over a transmission channel as well as to a corresponding decoder. To improve the error rate compared to a known Alamouti encoder, a scaled (and further preferred, rotated) Alamouti encoder is proposed comprising: mapping means for block by block mapping incoming symbols onto pairs of channel symbols, a block comprising two incoming symbols, the mapping being arranged for mapping the block onto two pairs of channel symbols such that said two pairs of channel symbols include scaled versions of said two incoming symbols and/or of the complex conjugate of at least one of said two incoming symbols, said scaled versions being obtained by applying a scaling function having a scaling factor with an absolute value different from one and being piece-wise linear with at least two pieces, and output means for outputting said channel symbols.01-28-2010
20110103511TRANSMISSION APPARATUS, SIGNAL SENDING APPARATUS, AND SIGNAL RECEIVING APPARATUS, AND TRANSMISSION METHOD, SIGNAL SENDING METHOD, AND SIGNAL RECEIVING METHOD - A transmission apparatus, a signal sending apparatus, and a signal receiving apparatus, and a transmission method, a signal sending method, and a signal receiving method capable of solving a problem of metastability and suppressing a delay of a signal when sending and receiving apparatuses having different operation clock frequencies send/receive the signal representative of control information, for example. Included are a sending part that operates in synchronization with a first clock having a first period to output a transmission signal having a signal level that is inverted in response to an input of a first pulse signal corresponding to the first period and a receiving part that operates in synchronization with a second clock having a second period to output a second pulse signal corresponding to the second period in response to inversion of a signal level of the transmission signal.05-05-2011
20120045016Transmission Circuit and Method for Transmitting a Bit Sequence to be Transmitted - A transmission circuit and method for transmitting a bit sequence to be transmitted is provided that includes a dividing device for dividing the bit sequence into an even-numbered bit sequence and into an odd-numbered bit sequence, a first device for forming the first sampled values of a first fundamental wave depending on the even-numbered bit sequence, a second device for forming second sampled values of a second fundamental wave depending on the odd-numbered bit sequence, the second fundamental wave being shifted relative to the first fundamental wave by a time period, and includes a summator for summation of the first sampled values of the first fundamental wave and the second sampled values of the second fundamental wave to form an output value sequence.02-23-2012
20120045014RESOURCE BLOCK MAPPING FOR CROSS-CARRIER ASSIGNMENTS - Methods and apparatuses are provided for cross-carrier decoding and mapping of data and control information in a wireless communication system.02-23-2012
20120057649RADIO TRANSMISSION APPARATUS, RADIO COMMUNICATION BASE STATION APPARATUS, RADIO COMMUNICATION MOBILE STATION APPARATUS, AND TRANSMISSION SIGNAL GENERATING METHOD - A base station allowing mobile stations to efficiently remove interference signals. In this base station, an encoding part performs an error correction encoding of transport data to generate a bit sequence comprising systematic bits and parity bits; a repetition part repeats, as a repetition subject, only the parity bits out of the plurality of bits included in the bit sequence, which is generated by the encoding part, so as to perform a rate matching; a modulating part modulates, after the repetition, the bit sequence to generate symbols; an S/P part parallel converts the symbols serially inputted from the modulating part (03-08-2012
20120002749METHOD AND APPARATUS FOR ENCODING FEEDBACK SIGNAL - A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.01-05-2012
20120002746INSERTION OF DOWNLINK DEMODULATION REFERENCE SIGNALS INTO OFDM FRAMES - A method of inserting downlink demodulation Reference Signals into Resource Blocks of slots within Orthogonal Frequency Division Multiplexing (OFDM) frames at an OFDM transmitter forming part of an OFDM system, the transmitter having at least one antenna and the system having at least one transmission layer, includes the steps of: for each antenna, inserting cell-specific Reference Signals at sub-carriers indices evenly spaced by a fixed sub-carrier spacing; and selectively inserting UE-specific Reference Signals into nodes of a rectangular lattice formed from unused Resource Elements in a group of Resource Blocks of two consecutive slots, the nodes being located at the same sub-carrier indices as the cell-specific Reference Signals and further being equally spaced by a fixed number of symbol indices within the group of Resource Blocks.01-05-2012
20120307935METHOD AND DEVICE FOR TRANSMITTING/RECEIVING INFORMATION IN CLOSED-LOOP MULTI-ANTENNA SYSTEM - The present invention discloses a method for transmitting information in a closed loop multiple antenna system. The method includes that: a transmission apparatus receives information transmitted from a reception apparatus, wherein the information includes codeword index information; the transmission apparatus selects a corresponding codeword from a double-layer-structure-based codebook according to the codeword index information; the transmission apparatus generates a precoding matrix according to the selected codeword; the transmission apparatus performs precoding for data to be transmitted according to the precoding matrix; the transmission apparatus transmits the precoded data to the reception apparatus. The present invention can enable a formed and used codebook to match channel distribution characteristic of a dual-polarized antenna as much as possible, and minimize performance loss brought by codebook quantization, thereby performance of a precoding system can be effectively improved.12-06-2012
20120045015SIGNAL TRANSMISSION DEVICE, AND TRANSMISSION CONTROL METHOD - There is provided a signal transmission device including a first communication module including a first signal transmission unit for transmitting a first transmission signal having first amplitude to a second communication module through a predetermined transmission path, and the second communication module including a second signal transmission unit for transmitting a second transmission signal having second amplitude different from the first amplitude to the first communication module through the predetermined transmission path, and a transmission timing adjustment unit for adjusting a transmission timing of the second transmission signal by the second signal transmission unit so that a transition timing of the first transmission signal transmitted from the first communication module and a transition timing of the second transmission signal coincide with each other at a receiving end of the first communication module.02-23-2012
20120045012METHOD AND DEVICE FOR TRANSMITTING DATA IN A WIRELESS COMMUNICATION NETWORK - A method and device for transmitting data in a wireless communication network uses both cognitive frequency diversity and antenna diversity. The method includes identifying a bandwidth of one or more potentially interfering frequency sub-bands from one or more potentially interfering signals in a radio frequency (RF) band (step 02-23-2012
20120045013METHOD FOR REAL-TIME ONLINE CONTROL OF HYBRID NONLINEAR SYSTEM - The present invention provides a method for real-time online control of hybrid nonlinear system, characterized in that, it comprises the following steps: a. the current observational state of plant in the network is transmitted to first controller, where said first controller is used to provide real-time online control for plant, which guarantees the asymptotic stability of the controlled plant in the network; b. Said first controller obtains the current control output information according to the current observation state information; c. Giving said output control information to said controlled plant in the network as feedback, wherein said controlled plant in the network is nonlinear hybrid system. The present invention realizes the control of nonlinear hybrid system through network by providing control method with quantized controller to guarantee the asymptotic stability of the system. Especially, the load capacity of network will be greatly reduced by transmitting the observation information after being quantized.02-23-2012
20090279637Bit-Error Rate in Fixed Line-Rate Systems - A method of reducing bit-error rate is described. The method includes transmitting a data stream of data words at a line rate that is adjustable and equal to a positive delta value added to an established data rate. The method includes accumulating available time slots in the transmitted data stream, and selectively retransmitting a subset of the data words such that the retransmitted data words occupy no more than the accumulated available time slots.11-12-2009
20120207241Bit Allocation Apparatus, Transmitter, Bit Allocation Method and Power Allocation Method - The present invention relates to a bit allocation apparatus, a transmitter, a bit allocation method and a power allocation method. The apparatus comprises: a selecting unit, for selecting a collection of modulation symbols from a predetermined number of modulation symbols according to a bit metric indicative of channel quality of each bit location in each modulation symbol, thus that a sum of numbers of bits on the modulation symbols included in the collection of modulation symbols is equal to a number of code word bits to be allocated; and an allocating unit, for allocating code word bits to be allocated to modulation symbols in the collection of modulation symbols selected by the selecting unit. The apparatus may select a sub-collection with good performance from a predetermined number of modulation symbols or subcarriers to allocate bits, thereby ensuring that the demodulation algorithm output optimal soft demodulating information.08-16-2012
20120207242ADAPTIVE PUNCTURING TECHNIQUE FOR MULTICARRIER SYSTEMS - Various embodiments are described for adaptive puncturing techniques.08-16-2012
20110064161FREQUENCY SELECTIVE TRANSMISSION APPARATUS - There is provided a frequency selective transmission apparatus. The frequency selective transmission apparatus includes: a preamble generating unit that generates a preamble for frame synchronization; an SFD/RI generating unit that generates a start frame delimiter/rate indicator (SFD/RI) having a function of an indicator to announce the start of the frame and a function to define the transmission rates of a header field or header and data fields; a header generating unit that generates a header including attribute information on transmission data; a data generating unit that has a predetermined processing gain and transmits digital data at a desired frequency band; a pilot generating unit that generates a pilot inserted into the frame for frequency offset compensation; a multiplexer that receives and multiplexes outputs from the preamble generating unit, the SFD/RI generating unit, the header generating unit, the data generating unit, and the pilot generating unit, respectively; and a signal electrode that transmits the output from the multiplexer into a human body.03-17-2011
20120008713HYBRID DATA TRANSMISSION CIRCUIT - A data transmitter having a parallel-to-serial conversion function is supplied with a clock by a PLL circuit unit. In the PLL circuit unit, a first multiphase clock supplied to a first parallel-to-serial conversion circuit is generated and output by a multiphase VCO circuit, while a second multiphase clock supplied to a second parallel-to-serial conversion circuit is generated and output by a multiphase clock generator. The multiphase clock generator generates the second multiphase clock based on the clock output from the multiphase VCO circuit.01-12-2012
20120008710Mapping Schemes for Secondary Synchronization Signal Scrambling - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.01-12-2012
20120008714MINIATURIZED ELECTRONIC DEVICE INGESTIBLE BY A SUBJECT OR IMPLANTABLE INSIDE A BODY OF THE SUBJECT - A miniaturized in-body electronic device is provided. One or more antennas (e.g., 01-12-2012
20120008712MIDAMBLE ALLOCATIONS FOR MIMO TRANSMISSIONS - Allocation of multiple training sequences transmitted in a MIMO timeslot from multiple transmit antenna elements is provided. For example, a method of generating signals in a MIMO timeslot, the method comprising: selecting a first training sequence; preparing a first data payload; generating a first signal including the prepared first data payload and the first training sequence; transmitting the first signal in a MIMO timeslot from a first antenna of a network element; selecting a second training sequence, wherein the second training sequence is different from first training sequence; preparing a second data payload; generating a second signal including the prepared second data payload and the second training sequence; and transmitting the second signal in the MIMO timeslot from a second antenna of the network element.01-12-2012
20120008711METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic.01-12-2012
20120008706METHOD FOR ENCODING DATA WITH DOUBLE-INTERLACED PARITY SYMBOLS, FOR A RADIO INFRASTRUCTURE, AND ASSOCIATED CODEC - A method is dedicated to encoding data that must be transmitted by means of a wave-based transmission infrastructure, and comprises i) a step consisting of creating in parallel M first matrices having T rows and C columns with subsets of data from B successive received bursts, the subsets of data from each burst being distributed within at least two successive first matrices, ii) a step consisting of creating in parallel M second matrices each having T rows and N columns with parity symbols resulting from encoding the data that is respectively contained in the rows of each of the M first matrices, iii) a step consisting of creating in parallel M first matrices having K rows and C columns with parity symbols resulting from encoding the data that is respectively contained in the columns of each of the M first matrices, and iv) a step consisting of distributing by interlacing, firstly, J subsets of parity symbols from each second matrix into J successive sets, and secondly P subsets of parity symbols from each third matrix into P of these successive sets, and of placing into each of the successive sets the respective data from the successive received bursts.01-12-2012
20120008709SINGLE CARRIER HIGH RATE WIRELESS SYSTEM - A signal generator and signal processor for single carrier wireless communication systems with frequency domain equalizer operable to use pseudorandom-noise sequences for cyclic prefix, the pseudorandom-noise sequences for coarse timing synchronization, channel estimation, carrier synchronization, signal-noise-ration estimation and channel equalization.01-12-2012
20120008708METHOD OF PROCESSING TRAFFIC INFORMATION AND DIGITAL BROADCAST SYSTEM - A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.01-12-2012
20120008707METHOD FOR CONTROLLING TRANSMISSION POWER IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless access system, and more particularly, to a method for controlling uplink transmission power in consideration of a transmission rank in a multi-antenna environment. A method for controlling the transmission power of an uplink data channel at a transmitting end which supports a plurality of transmission ranks according to one embodiment of the present invention, comprises the steps of: determining a first transmission power using at least one rank variable dependent on the transmission rank in a specific subframe; comparing the determined first transmission power with a second transmission power which is the preset maximum transmission power; and determining the value judged to be smaller than the result of the comparison to be the transmission power of the data channel.01-12-2012
20110051842EFFICIENT LINEAR LINC POWER AMPLIFIER - Method for setup of parameter values in a RF power amplifier circuit arrangement (03-03-2011
20120014473TRANSMITTING DATA OVER A COMMUNICATIONS CHANNEL - Techniques for transmitting data over a communications channel are generally described. A value of a property of an inverse of a channel matrix corresponding to the communications channel may be calculated and compared to a threshold value. If the value of the property a first one of greater than or less than the threshold value, at least one transmit message may be altered using a vector perturbation technique to generate data symbols and the data symbols may be precoded using a channel inversion technique to generate precoded data symbols. If the value of the property is the other of greater than or less than the threshold value, the at least one transmit message may be precoded using a channel inversion technique to generate precoded data symbols.01-19-2012
20120057647Method, Apparatus and System for Transmitting Information Bits - A method, an apparatus, and a system for transmitting information bits, where the method for transmitting information bits includes: dividing the information bits to be transmitted into at least two groups; encoding the information bits to be transmitted in each group; modulating the coded bits obtained by the encoding to obtain modulation symbols, in which each modulation symbol is obtained by using the modulation of the coded bits in the same group; and mapping and transmitting the modulation symbols. In this way, the receiving end easily reduces the algorithm complexity, thereby ensuring the performance of the receiving end.03-08-2012
20120057648METHOD FOR ENCODING DATA WITH AT LEAST TWO ENCODING STEPS, AND AT LEAST ONE PERMUTATION STEP, CORRESPONDING ENCODING DEVICE, COMPUTER PROGRAM AND SIGNAL - A method is provided for encoding data to be sent to at least one receiver, including at least two identical encoding steps and at least one permutation step. Each encoding step associates a block of encoded data with a block of data to be encoded, using at least two basic codes, each code processing a subset of the data block to be encoded. The permutation step is inserted between two encoding steps, i.e. a current encoding step and a previous encoding step, such that the order of the data in a data block to be encoded by the current encoding step is different from the order of the data encoded by the previous encoding step. The permutation step implements, for a data block, a rotation applied to the data of the data block and a reversal of the order of the data of the data block. The operations can be implemented by an interleaving matrix.03-08-2012
20090180572Apparatus and method for space frequency block coding in a multiple input multiple output single carrier wireless communication system - A Multiple Input Multiple Output (MIMO) single carrier wireless communication system is provided. The system includes a coder for performing block coding on symbols, an extender for collecting the block-coded symbols during one transmit (Tx) signal duration and for performing repetitive extension on the collected symbol vectors by an interval required in a frequency domain, an inserter for inserting ‘0’ to the repetitively extended symbol vectors so that the vectors are mutually orthogonal in a time domain, and a combiner for multiplying the ‘0’-inserted symbol vectors by a phase component so that the vectors are mutually orthogonal in the frequency domain and thereafter for combining the symbol vectors to generate a Tx signal for each antenna.07-16-2009
20090161791Transmitter Using Linear Space-Time Codes For Wide-Band and/or Low-SNR Multiple-Antenna Wireless Communication Systems And Method Of Using Same - A linear space-time LST encoder in a transmitter transmitting data over a wireless communications channel. Data are distributed over plural transmit antennas, plural time intervals, or both, according to a space-time matrix containing LST codes. The encoder comprises means for splitting each block of information bits into q equal length sub-blocks; means for mapping each sub-block to a symbol s06-25-2009
20090245415System and Method for Scheduling Variable Bit Rate (VBR) Streams in a Wireless Communications System - A system and method for scheduling variable bit rate (VBR) streams in a wireless communications system is provided. A method for broadcasting data includes receiving a plurality of broadcast data streams, assigning the broadcast data streams into a plurality of frames, each frame including data from no more than one of the broadcast data streams, re-allocating the plurality of frames, and causing the frames to be broadcast wirelessly. The re-allocating is based on a queue length associated with each of the broadcast data streams and an arrival rate for data of each of the broadcast data streams.10-01-2009
20120114066METHOD AND APPARATUS FOR WEIGHT FACTOR MATRIX DETERMINATION FOR BEAM FORMING - Disclosed is a weight factor matrix determining method for beamforming in a base station in order for inter-cell interference to be removed. The weight factor matrix determining method for beamforming which includes: determining a first transmission power for a first terminal being a target terminal and a second transmission power for a plurality of second terminals other than the target terminal; calculating an Eigen vector with an Eigen value for a ratio of the first and second transmission powers; and determining a weight factor matrix in a serving base station, with the calculated Eigen vector.05-10-2012
20120027124BASE STATION, COMMUNICATION SYSTEM INCLUDING BASE STATION AND TRANSMISSION METHOD - Channel fluctuation values on propagation paths of modulated signals transmitted from a plurality of antennas are estimated, an eigenvalue of a channel fluctuation matrix created with the above-mentioned channel fluctuation values as elements is found in order to relate antenna received signals to modulated signals, and using that eigenvalue, receiving antenna selection, combining of modulated signals, and weighting processing on soft decision decoded values, are performed, and modulated signals are demodulated. By this means, it is possible to perform demodulation processing based on the effective reception power of a modulated signal (that is to say, the essential reception power, of the reception power obtained by a receiving apparatus, that can be effectively used when demodulating a modulated signal), enabling the precision of demodulation of modulated signals to be improved.02-02-2012
20120027123METHOD FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting and receiving data in a wireless communication system. The method for transmitting data in a wireless communication system, according to one aspect of the present invention, comprises a step in which a base station transmits downlink data to a first terminal which supports a first system via a first region of a frame, and transmits downlink data to a second terminal which supports a second system via a second region which follows the first region corresponding to a frame offset on a time axis, wherein said frame offset is an offset of the start point of the frame for said first system and the start point of the frame for said second system, and said first region includes 3+6 (said frame offset-1) OFDM symbols.02-02-2012
20120027121Modular Frequency Divider and Mixer Configuration - A system including a first frequency divider, a plurality of second frequency dividers, and a control module. The first frequency divider includes a first plurality of components and is configured to divide an input frequency of an input signal to generate a first signal having a first frequency and a first phase. Each of the plurality of second frequency dividers includes a second plurality of components and is configured to divide the input frequency of the input signal to generate a second signal having the first frequency and a second phase. The control module is configured to connect the second plurality of components of one of the second frequency dividers to the first plurality of components of the first frequency divider.02-02-2012
20120027122APPARATUS AND METHOD FOR ENCODING A SIGNAL - An apparatus and method for encoding a signal are provided. The apparatus and method of the present disclosure identify the various portions, or bytes, of an incoming packet in a Reed-Solomon (RS) encoded packet as either data bytes, RS parity bytes, or trellis reset synchronization bytes. The data bytes are passed through without change. The trellis reset bytes are provided to a trellis encoder to determine new byte reset values. These new values are then stored and later retrieved when needed and used to modify the appropriate incoming parity bytes. The new incoming parity bytes are computed using the new trellis reset byte values multiplied by, or added to, a weighting value retrieved from a table stored in memory based on a location of the parity byte and a location of the trellis reset byte in the RS encoded packet.02-02-2012
20120027119Mixed mode modulation for OFDM - In a wireless OFDM communication system such as a neighborhood area network, one or more of the following features may be used to increase throughput while accommodating worst-case channel conditions. Firstly, the cyclic prefix may be chosen to be greater than or equal to the longest delay profile that could reasonably be expected so that either demodulation method can be accommodated. Secondly, the number of pilots may be chosen to be less than that required by the worst case channel so that the data rate is maximized for a large portion of the channels in use. Thirdly, the data packet may be constructed such that the demodulation mode employed for data payload encoding is signaled in the first portion of the data packet often referred to as the PHY Header. The PHY Header is always transmitted as a coherent modulation including data and pilot tones.02-02-2012
20120027120METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a reference signal in a wireless communication system is provided. CSI-RSs are generated for each of a plurality of antennas. The CSI-RS are mapped to a resource region on a basis of a CSI-RS pattern according to the number of the plurality of antennas. The CSI-RS are transmitted to a user equipment (UE).02-02-2012
20120106670METHOD, SERVER AND CUSTOMER TERMINAL FOR DIGITAL CONTENT TRANSMISSION - A server is provided. The serve includes a publishing module, a program module, a relationship module, and a transmission module. The publishing module publishes digital content. The program module stores programs for playing the digital content. The relationship module stores a relationship between the digital content, a plurality of pre-stored hardware information of customer terminals, and programs for playing corresponding the digital contents corresponding to hardware information. The transmission module searches a particular one of the programs for playing a particular one of the digital contents in response to a request from a customer terminal for downloading the particular digital content. The particular program is corresponding to the hardware information of the customer terminal according to the pre-stored hardware information. The transmission module further transmits the particular digital content and the particular program to the customer terminal A customer terminal and a digital content transmission method are also provided.05-03-2012
20120063540OFDM SIGNAL TRANSMISSION METHOD AND APPARATUS - An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus which transmits OFDM signals by using a plurality of transmission antennas includes a subcarrier setting device which sets signals for subcarriers so as to use some of the subcarriers of the OFDM signals as pilot subcarriers to transmit pilot signals and use the remaining subcarriers as data subcarriers to transmit data signals, the subcarrier setting device changing polarities of signals for the pilot subcarriers for each transmission antenna.03-15-2012
20120063541METHOD AND DEVICE FOR DETERMINING ESTIMATED VALUES FOR TRANSMITTED SYMBOLS IN A MIMO-OFDM SYSTEM - A method for determining estimated values for data symbols transmitted from at least four transmission antennas of a MIMO transmission system, which are encoded according to the Matrix B transmission mode and weighted with coefficients (v03-15-2012
20120063539LANE-TO-LANE SKEW REDUCTION IN MULTI-CHANNEL, HIGH-SPEED, TRANSCEIVER CIRCUITRY - Controllable delay circuitry is included in each channel of multi-channel, high-speed, serial transmitter and/or receiver circuitry to compensate for or to at least help compensate for possible skew (different signal propagation time) between the various channels. In systems employing CDR circuitry, the delay circuitry may be at least partly controlled by a signal derived from the CDR circuitry to make the amount of delay effected by the delay circuitry at least partly responsive to changes in data rate detected by the CDR circuitry.03-15-2012
20120063538Method for Transmitting an Information Sequence - Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.03-15-2012
20120063537Turbo coding having combined turbo de-padding and rate matching de-padding - Turbo coding having combined turbo de-padding and rate matching de-padding. An approach is presented by which a singular module is operable to perform both zero bit de-padding and dummy bit de-padding in accordance with turbo encoding. Zero padding can be performed on an input information stream before undergoing turbo encoding. One or more of the 3 outputs from the turbo encoding module (e.g., systematic bits, parity 1 bits, and parity 2 bits) may then undergo dummy bit padding as well. Thereafter, these 3 streams (some or all of which may have undergone dummy bit padding) undergo sub-block interleaving. After all of these operations have taken place, a singular combined de-padding module that can be employed to perform de-padding any zero padded bits and any dummy padded bits from each of the three streams that have undergone the sub-block interleaving.03-15-2012
20120063535TRANSMITTING APPARATUS AND RECEIVING APPARATUS - According to one embodiment, a transmitting apparatus includes a generation unit, a division unit, an imparting unit and a transmitting unit. The generation unit generates first control information in accordance with a first information format. The division unit divides the first control information into control information pieces in accordance with information format divisions into which the first information format is divided and which include respective pointer regions, each of the information format divisions having a same data length as a second information format. The imparting unit imparts, to the pointer region of each of the information format divisions, a pointer indicating a wireless communication resource used to transmit one of the control information pieces corresponding to one of the information format divisions other than the each control information format division. The transmitting unit transmits the control information pieces.03-15-2012
20120063533Encoding and decoding using constrained interleaving - Serially-concatenated codes are formed in accordance with the present invention using a constrained interleaver. The constrained interleaver cause the minimum distance of the serial concatenated code to increase above the minimum distance of the inner code alone by adding a constraint that forces some or all of the distance of the outer code onto the serially-concatenated code. This allows the serially-concatenated code to be jointly optimized in terms of both minimum distance and error coefficient to provide significant performance advantages. These performance advantages allow a noise margin target to be achieved using simpler component codes and a much shorter interleaver than was needed when using prior art codes such as Turbo codes. Decoders are also provided. Both encoding and decoding complexity can be lowered, and interleavers can be made much shorter, thereby shortening the block lengths needed in receiver elements such as equalizers and other decision-directed loops. Also, other advantages are provided such as the elimination of a error floor present in prior art serially-concatenated codes. That allows the present invention to achieve much higher performance at lower error rates such as are needed in optical communication systems.03-15-2012
20090135948SYSTEM AND METHOD FOR DELIVERY OF VIDEO, CONTENT ON DEMAND AND IP PACKETS - The present application describes a method and filter for shaping a series of pulses spaced in time for subsequent transmission in a communications system, each of the pulses having a magnitude comprising the steps of providing a generic shaped pulse, for each pulse in the series, generating a shaped pulse by scaling the generic shaped pulse by an amount proportional to the magnitude, wherein at least a portion of each generated pulse overlaps in time with at least a portion of at least one subsequent generated pulse, and combining the overlapping portions of the generated pulses.05-28-2009
20090135947METHOD OF SELECTING CANDIDATE VECTOR AND METHOD OF DETECTING TRANSMISSION SYMBOL - The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected.05-28-2009
20120063536Method and Device for Processing a Digital Complex Modulated Signal Within a Polar Modular Transmission Chain - Method of processing a digital complex modulated signal, comprising performing pre-processing said digital complex modulated signal (DCMS) for obtaining a pre-processed digital complex modulated signal (PPRS) and performing a Cartesian to polar conversion of said pre-processed signal, said pre-processing including analysing the trajectory of said digital complex modulated signal and if said trajectory crosses a region (RAO) around the origin (O) of the complex plane, modifying said digital complex modulated signal such that said pre-processed signal has a modified trajectory avoiding said region.03-15-2012
20130170576Assembly and Method for Detecting Multiple Level Signals - Multiple level signals are constructed from more than one level of component sequences each having correlation properties. A receiver receives the multiple level signal. A signal detector in the receiver performs correlation or matched filtering to the received signal. When a signal is detected, the signal detector triggers a timing estimator, a phase estimator, and a frequency estimator. The timing estimator employs an output signal from the signal detector, performs interpolation and timing estimation. The timing estimate adjusts a sampling clock for time synchronization. The phase estimator employs output signals from the correlation devices to estimate phase. The phase estimate is employed to achieve phase synchronization. The received signal is converted to an equivalent continuous wave signal by the frequency estimator. The frequency estimator performs discrete Fourier transform to the continuous wave signal, and estimates frequency offset. The frequency offset estimate is employed to achieve frequency synchronization.07-04-2013
20120155569LOCATION SYSTEM - A receiver device for receiving a signal that comprises one or more periodic features, the receiver device comprising: a detector configured to listen to the signal during at least a first reception phase, and to be triggered when a feature of the signal is received so as to determine the time of reception of that feature; and a receiver configured to process time-limited segments of the signal so as to derive information from features of the signal received during those segments, the receiver being configured to be dependent on the detector such that after the first reception phase the timings of the time-limited segments processed by the receiver are dependent on the time of reception determined by the detector.06-21-2012
20120300875APPARATUS FOR AND METHOD OF TRANSMITTING HIGH EFFICIENCY VARIABLE POWER - An apparatus for transmitting a high efficiency variable power includes a pulse generating unit configured to generate a pulse signal comprising a pulse having a duration corresponding to an amount of power transmitted; a pulse stream generating unit configured to convert the pulse signal to a pulse stream having pulse shape corresponding to the duration of the pulse and data to be transmitted; and a high frequency modulating unit configured to output a variable power by modulating a high frequency signal having a constant amplitude on a time axis by repeatedly outputting and not outputting the high frequency signal based on the pulse stream.11-29-2012
20120300873FORWARD ERROR CORRECTION WITH EXTENDED EFFECTIVE BLOCK SIZE - In an aspect, in general, a forward error correction algorithm (FEC) utilizes an FEC block structure in a manner that extends the effective error correction such that it can approach an “infinite” length to obtain benefits typical of very large FEC block size without the commensurate computation cost.11-29-2012
20120300872IN-BAND DATA COMMUNICATION SYSTEM USING WIRELESS POWER - Provided is data transmission and reception that transmits and receives data using a wireless power between wireless power transmitter and a wireless power receiver. An in-band data communication apparatus using a wireless power may include a modulating unit configured to modulate data by mixing a predetermined signal and pulse signal-type data; a demodulating unit configured to detect reflected power generated due to impedance mismatching between a source resonator and a target resonator, and to demodulate received data based on a variance of the reflected power; a source resonance unit configured to transmit transmission power including the modulated data to the target resonator, and to receive the reflected power; and a controller to control the pulse signal-type data, and to control impedance matching between the source resonator and the target resonator.11-29-2012
20120300871WIRELESS DEVICE WITH EXTENDABLE ANTENNA - A wireless device has receiver circuits and/or transmitter circuits supporting at least two simultaneous independent transmit paths in the same frequency band, and a multiport antenna with N ports, for the available receiver or transmitter circuits. The multiport antenna has a compact mechanical state and an extended mechanical state, and is connected to the N ports of the receiver and/or transmitter circuits by a 2N-port matching and decoupling network. This has multiple, selectable electrical states, each corresponding to at least one of the mechanical states. One combination of the mechanical state and the electrical state allows operation in a wireless channel of rank N. A second combination of the mechanical state and the electrical state allows operation in a wireless channel of rank less than N. Better MIMO performance with the extended antenna configuration can be obtained with the convenience of retaining limited performance when the user cannot use the extended antenna.11-29-2012
20120300870RADIO TRANSMITTER SYSTEM AND METHOD - A radio transmitter system responsive to a binary signal drives a narrow bandwidth VLF or LF antenna. A generator derives a first variable frequency wave frequency coded based on bit values of a binary signal. An arbitrary impulse response signal processor responsive to the first wave derives a first output signal having real and imaginary components representing the shape of a modulating wave having a variable amplitude envelope and the frequency of the coded values. A transmitter responsive to the processor output signal and a VLF or LF carrier supplies the antenna with another output signal including a modulation wave having a shape that is a substantial replica of the modulating wave shape. The processor causes the signal emitted by the antenna system to include modulation having a shape that is substantially the shape of the first wave.11-29-2012
20100310005MOBILE COMMUNICATION DEVICE, BASE STATION DEVICE, RADIO CONTROL METHOD, AND MOBILE COMMUNICATION SYSTEM - A mobile communication device includes a plurality of antennas which transmits and receives a radio signal, and a baseband processor which selects a transmission antenna used for data signal transmission from the plurality of antennas based on an instruction from a base station device and transmits a data signal using the transmission antenna, wherein the baseband processor determines a timing when a reference signal is transmitted using a standby antenna not used for data signal transmission based on the likelihood of the transmission antenna being switched and transmits the reference signal based on the determined timing.12-09-2010
20120155568INTERFACE SYSTEM, AND CORRESPONDING INTEGRATED CIRCUIT AND METHOD - An interface system is used for interfacing a synchronous circuit with an asynchronous circuit, wherein the synchronous circuit generates, in response to a clock signal, a first control signal for indicating that a first data signal contains valid data, and wherein the asynchronous circuit generates, according to an asynchronous communication protocol, a second control signal indicating the state of transmission of a second data signal.06-21-2012
20120155570DEVICE AND METHOD FOR PERFORMING BITWISE MANIPULATIONS - A device and a method for performing bitwise manipulation is provided. Multiple bitwise logic circuits are coupled to an instruction decoder, a register array and a rotator. Each bitwise logic circuit includes input multiplexers connected to an output multiplexer. The instruction decoder is receives a bit manipulation instruction and sends to each corresponding input multiplexer a control signal based on a type of the instruction. Each input multiplexer of each bitwise logic circuit receives a control signal, a constant signal that has a value that is indifferent to the value of the mask, and a mask affected signal that has a value that is responsive to a value of an associated mask bit. Each input multiplexer selects between the constant signal and the mask affected signal based on the control signal, and outputs a selected signal. Each output multiplexer receives selected signals from each of the corresponding input multiplexers, and elects between the selected signal based on a value of an associated manipulated register bit and based on a value an associated control register bit.06-21-2012
20120155571METHOD, APPARATUS, AND SYSTEM FOR DATA SIGNAL TRANSMISSION IN MULTI-ANTENNA SYSTEM - A method and an apparatus for data signal transmission are disclosed. A data signal is coded through space-time-frequency coding to form k1 space-time-frequency bit streams. P of the k1 space-time-frequency bit streams are divided into K06-21-2012
20120155567DATA TRANSMISSION APPARATUS AND TRANSMISSION METHOD THEREOF - Disclosed herein is a data transmission apparatus including: a clock generating unit generating a clock signal by combining a first unit clock signal and a second unit clock signal formed by delaying the first unit clock signal by a predetermined time; a transmission controlling unit transmitting data in synchronization with the generated clock signal, thereby making it possible to transmit more data at a high speed.06-21-2012
20120155566FAST ACCESS ASYNCHRONOUS REPEATER WAKEUP PROTOCOL - A method for transmitting a communication generated by an originating device to a target device using a repeating device is provided. In the method the communication is transmitted from the originating device and received at the repeating device. A repeater request sequence is transmitted from the originating device and retransmitted from the first repeating device to the target device before the repeater request sequence is received at the first repeating device.06-21-2012
20120106672METHODS AND ADAPTERS FOR USE WITH ELECTRIC DEVICES TO MANAGE ENERGY SERVICES - Methods and adapters for realizing energy services by a device via a grid connection point are disclosed. An adapter includes a detection unit for measuring a quantity of energy services realized by a mobile device; an identification unit for detecting the identifier of the grid connection point electrically connected to the device; and a communication unit to report connection event information including: quantity of the energy service realized by the device; an identifier associated with the adapter; and the identifier of the grid connection point. In another embodiment, a method receives an energy service signal indicating operating set points for a mobile device; communicates the indicated operating set points to the device; and measures a quantity of energy services realized by the device. The method communicates quantity information of energy services realized by the device and sends updated operating set points for the device based on the communicated quantity information.05-03-2012
20110085617SYSTEM AND METHOD FOR PROVIDING A FULL FAIL-SAFE CAPABILITY IN SIGNAL TRANSMISSION NETWORKS - Systems and methods for providing a full fail-safe capability in signal transmission networks are disclosed. For example, a system for providing a full fail-safe capability in signal transmission networks includes at least a first electronic circuit to transmit and receive signals or data, at least one driver unit coupled to the at least a first electronic circuit, and at least one receiver unit coupled to the at least a first electronic circuit and the at least one driver unit. The at least one receiver unit includes at least one offset signal generating unit, a signal comparing unit, and a switching unit to couple an offset signal from the at least one offset signal generating unit to an input of the signal comparing unit.04-14-2011
20120106669DYNAMIC ENCODE SETTING ADJUSTMENT - A player decodes and renders encoded digital data received from an encoder. During processing, the player periodically monitors dropped frames as well as time spent. If the dropped frames are below a minimum, the player determines to signal the encoder to increase bit rate or frame rate by consulting a table. If the player determines to increase bit rate, the player signals accordingly. However, if the player determines to increase frame rate, the player first verifies that the spent time is below a minimum. To the contrary, if the dropped frames are both above the minimum and a first maximum but nota second maximum, the player determines to signal the encoder to decrease bit rate or frame rate by consulting the table and signaling accordingly. However, if the dropped frames are above the second maximum, the player signals the encoder to decrease the frame rate without consulting the table.05-03-2012
20100172436APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SECONDARY SYNCHRONIZATION CHANNEL IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmitting/receiving an S-SCH in an Institute of Electrical and Electronics Engineers (IEEE) 802.16m wireless communication system are provided. A method for transmitting, by a transmitter, a Secondary Synchronization CHannel (S-SCH) in a communication system includes generating a sequence depending on a cell IDentification (ID), determining a subcarrier set comprising subcarriers to map the generated sequence, based on a Fast Fourier Transform (FFT) size and a segment ID, and mapping the generated sequence to the subcarriers of the determined subcarrier set.07-08-2010
20100172434Method For Transmitting Codeword - A method for transmitting a codeword through a subchannel consisting of a plurality of tiles in a wireless communication system in which one tile comprises a plurality of data subcarriers and at least one pilot subcarrier is provided. The method includes generating a codeword by assigning pilot symbols to the at least one pilot subcarrier in each tile, by assigning a first codeword symbol to some of the plurality of data subcarriers, and by assigning a second codeword symbol to the remaining data subcarriers, the codeword corresponding to the plurality of tiles, and transmitting the codeword. Resources on a frequency-time axis can be effectively used for transmitting various data or control information.07-08-2010
20100172435POWER TUNING SYSTEM AND METHOD FOR POWER AMPLIFIER - An automatic power tuning system and method, and a transmitter employing either the system or the method. In one embodiment, the system includes: (1) a power detector circuit coupled to an output of a transmitter, the transmitter having an integrator with a first, reference integrator current power control input, a second, integrator capacitor power control input and a plurality of driver fingers selectably employable by a third, driver finger power control input, the power detector configured to generate signals indicating an output voltage of the transmitter and (2) a digital processing circuit coupled to the power detector circuit and configured to employ the signals to determine at least near-optimum reference integrator current and integrator capacitor settings and select a number of driver fingers to employ to drive the output voltage.07-08-2010
20110103509DOWNLINK CONTROL TRANSMISSION IN MULTICARRIER OPERATION - A wireless communication network distributes resources for a Physical Downlink Control CHannel (PDCCH) over multiple carriers in accordance with a constraint that limits a number of blind decoding actions required by user equipment (UE). Distribution can entail segregating UE-specific and common search spaces to different monitored carriers. Distribution can entail segregating aggregation levels to different monitored carriers. Distribution can entail segregating a number of decoding candidates for a given aggregation level to different monitored carriers. The distribution can be orthogonal or non-orthogonal, and can be UE-based or per cell-based. The distribution can be static, semi-static or hop with time.05-05-2011
20110103508Digital Affine Transformation Modulated Power Amplifier for Wireless Communications - A digital affine transformation modulator and power amplifier drives a transmitter antenna. The modulator performs an affine transformation on a signal, wherein the I, Q space is mapped to a plurality of sectors. A signal in a sector is expressed as the sum of two vectors, the angles of which define the sector boundaries. A digital power amplifier comprises a plurality of amplifier cells, each cell comprising at least two amplifier units. For a given signal, each amplifier unit selectively amplifies a clock signal having a phase corresponding to one of the boundary angles of the signal's affine transformed sector. A subset of the plurality of amplifier cells receiving each phase clock signal are enabled, based on the magnitude of the associated vector describing the signal in affine transform space. The modulation scheme exhibits higher efficiency than quadrature modulation, without the bandwidth expansion and group delay mismatch of polar modulation.05-05-2011
20120121035DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD - A method of processing data in a transmitter includes separating ensembles including mobile service data; building a Reed-Solomon (RS) frame including the mobile service data, dividing the built RS frame into RS frame portions; encoding signaling data including fast information channel (FIC) data including cross layer information for mobile service acquisition and transport parameter channel (TPC) data including FIC version information for identifying an update of the FIC data, wherein the TPC data is RS-encoded at a first code rate, and the FIC data is block-interleaved after being RS-encoded at a second code rate; forming a data group including data of an RS frame portion and the signaling data; and transmitting a broadcast signal including the formed data group.05-17-2012
20120121034TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD AND RECEPTION APPARATUS - All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.05-17-2012
20100290560Digital Broadcast Service Discovery Correlation - Aspects of the invention are directed to service and channel discovery in a digital broadcast network. A pilot synchronization symbol, which has known characteristics, is included as a first symbol of digital broadcast frames. The pilot symbol, which can be decoded without having to resort to trial and error methods, contains parameters for the rest of the signal. In another aspect of the invention, at least two pilot symbols may be defined and used at the beginning of each frame. The at least two pilot symbols P1 and P2 may enable fast channel search and service discovery within the frame. Signaling may be realized as a combination of L1 and L2 signaling.11-18-2010
20100290556RADIO SIGNAL TRANSMISSION DEVICE, RADIO SIGNAL TRANSMISSION METHOD, RADIO SIGNAL RECEPTION DEVICE, RADIO SIGNAL RECEPTION METHOD, AND RADIO SIGNAL RECEPTION PROGRAM - To provide a radio signal reception device which can reduce a process delay and reduce a buffering capacity and a power consumption. Specifically, the radio signal reception device includes: a demapping unit which extracts a sub frame from a received radio signal, judges whether a first OFDM symbol existing at the head of the sub frame and forming a control channel contains information on a signal destined to a reception device contained in a data channel, and if yes, outputs a plurality of OFDM symbols; and a decoding unit which decodes the OFDM symbols which has been outputted from the demapping unit. If the first OFDM symbol contains no information on the signal destined to the reception device, the demapping unit terminates the sub frame reception processing.11-18-2010
20100290555SIGNAL EMISSION BY PLURAL ANTENNAS - A radio communication emitter includes at least two antennas for emitting a signal including encoded bits that are converted into symbols distributed on subcarriers and in time intervals. The emitter includes a signal divider for distributing the set of the signal symbols into as many disjoined subsets of signal symbols as the antennas that the emitter comprises. Each subset is dedicated to one of the antennas. The union of the subsets is the set of the signal symbols. Symbols are distributed in at least two subsets for at least one time interval or for at least one subcarrier of the signal. The antennas synchronously emit the symbol subsets. The symbol subsets can comprise a substantially identical number of symbols to reduce a deviation between the power peaks and the average power of the signal emitted by each antenna.11-18-2010
20120314795High Output Power Digital TX - The disclosed apparatus and corresponding method uses amplifiers and a differential combiner to control the output power of a digital-to-analog upconverter and to isolate In-phase and Quadrature branches of the upconverter. First and second upconverters convert In-phase and Quadrature portions of a baseband digital value to respective first/second In-phase (I12-13-2012
20120213308MANAGING ACKNOLWLEDGEMENT MESSAGES FROM MULTIPLE DESTINATIONS FOR MULTI USER MIMO TRANSMISSIONS - Certain aspects of the present disclosure generally relate to apparatus and methods for managing acknowledgement messages from multiple destinations for multi-user multiple-input multiple-output (MU-MIMO) transmissions. According to certain aspects, a polled block acknowledgement (BA) mechanism can be considered mandatory to an acknowledgement protocol, and a sequential (or other type of scheduled/deterministic) mechanism can be considered optional.08-23-2012
20120314800TRANSMITTER - In a transmitter, communication is efficiently performed by a DSTBC scheme.12-13-2012
20120128094RADIO APPARATUS - A control unit generates packet signals to be transmitted. The control unit uses either a first packet format, where a second known signal defined by a second radio communication system different from a first radio communication system is assigned anterior to a first known signal defined by the first radio communication system, or a second packet format, where the first known signal is assigned in an anterior part. Subcarriers to be used in the first known signal contain subcarriers to be used in the second known signal, and the first known signal and the second known signal are defined by different values.05-24-2012
20120128095APPARATUS AND METHOD FOR MAPPING SYMBOLS TO RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method for transmitting data information and control information by a transmitter in a communication system is provided. The method includes identifying an amount of resources to be used for control channel transmission within a predetermined maximum amount of resources available for control channel transmission among total resources of a subframe; mapping control information onto the identified amount of resources to be used for the control channel transmission; mapping data information onto all remaining resources of the subframe, other than the identified resources used for the control channel transmission among the total resources; and transmitting information related to the amount of resources to be used for the control channel transmission, through a predetermined control channel; and transmitting the mapped control information, and the mapped data information.05-24-2012
20120128096METHOD AND DEVICE FOR GENERATING SCRAMBLING CODE - The present invention discloses a method and apparatus for generating a scrambling code, and the method includes: acquiring initial sequences X0, Y0; extending the initial sequences X0, Y0 for (└N/M┘+1) times, and obtaining extended sequences X*, Y*, wherein, the N is a positive integer, 005-24-2012
20120128093APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN MOBILE COMMUNICATION SYSTEM - Methods and apparatus are provided for transmitting/receiving data in consideration of carrier frequency in the mobile communication system using multiple transmission antennas for increasing data rate and system throughput. A number of antennas and a plurality of symbols are determined via an in-phase domain and a quadrature-phase domain. The symbols are mapped according to the number of antennas and the in-phase domain and the quadrature-phase domain. The mapped symbols are transmitted through corresponding antennas.05-24-2012
20120128092DIGITAL SIGNAL PROCESSING CIRCUIT FOR GENERATING OUTPUT SIGNAL ACCORDING TO NON-OVERLAPPING CLOCK SIGNALS AND INPUT BIT STREAMS AND RELATED WIRELESS COMMUNICATION TRANSMITTERS - A digital signal processing circuit includes a combining stage and an output stage. The combining stage is arranged to receive a plurality of non-overlapping clock signals having a same frequency but different phases, receive a plurality of first input bit streams, and generate a first output bit stream by combining the first input bit streams according to the non-overlapping clock signals. The output stage is arranged to generate an output according to the first output bit stream. A digital signal processing method includes: receiving a plurality of non-overlapping clock signals having a same frequency but different phases; receiving a plurality of first input bit streams; generating a first output bit stream by combining the first input bit streams according to the non-overlapping clock signals; and generating an output according to the first output bit stream.05-24-2012
20120128091IN-BAND GENERATION OF LOW-FREQUENCY PERIODIC SIGNALING - In a first embodiment of the present invention, a method for communicating main and auxiliary data over a transmission medium is provided, the method comprising: generating a low-frequency output pattern using a high-frequency oscillator, wherein the low-frequency output pattern contains the auxiliary data encoded in a first scheme, wherein the first scheme resembles an output pattern that would be generated by a low-frequency oscillator; sending the low-frequency output pattern through a transmitter to be transmitted over the transmission medium; generating a high-frequency signal using a high-frequency oscillator, wherein the high-frequency signal contains the main data encoded in a second scheme different than the first scheme; and sending the high-frequency signal through the transmitter to be transmitted over the transmission medium.05-24-2012
20100208841TRANSMIT DIVERSITY PROCESSING FOR A MULTI-ANTENNA COMMUNICATION SYSTEM - For transmit diversity in a multi-antenna OFDM system, a transmitter encodes, interleaves, and symbol maps traffic data to obtain data symbols. The transmitter processes each pair of data symbols to obtain two pairs of transmit symbols for transmission from a pair of antennas either (1) in two OFDM symbol periods for space-time transmit diversity or (2) on two subbands for space-frequency transmit diversity. N08-19-2010
20120213309PHASE ADJUSTING DEVICE AND CAMERA - A determining unit of a phase adjusting device determines whether or not a data stream to be detected included in serial transfer data can be detected in each output (first output to fourth output) of a first data obtaining unit and a second data obtaining unit. A phase adjusting unit adjusts a delay amount given to the serial transfer data to be output based on a determination result of the determining unit.08-23-2012
20110182380OFDM GENERATION APPARATUS IN A MULTI-CARRIER DATA TRANSMISSION SYSTEM - The present invention relates to OFDM generation apparatus and methods for generating OFDM transmission signals from OFDM symbols, each comprising a plurality of OFDM subcarriers, for transmission in a multi-carrier data transmission system. An embodiment of the proposed apparatus and method are adapted for using a selected mixing frequency for mixing said complex time-domain samples of said OFDM symbol from a baseband frequency up to a passband frequency by use of a mixing frequency to obtain said OFDM transmission signal, wherein the mixing frequency is selected such that common phase rotations of the OFDM subcarriers of said OFDM symbol with respect to adjacent OFDM symbols of said OFDM transmission signal are avoided or compensated after said mixing. Further embodiments for avoidance or compensation of such common phase rotations are provided.07-28-2011
20120314804Processing of Multi-Carrier Signals Before Power Amplifier Amplification - Embodiments for methods and apparatuses for processing a multi-carrier signal are disclosed. One method includes shaping a frequency spectrum of a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal. The shaped frequency spectrum multi-carrier transmit signal is amplified with a power amplifier, wherein a power level of an output of the power amplifier is greater than a rated power level of the power amplifier.12-13-2012
20120314801TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.12-13-2012
20120314803TRANSMITTING APPARATUS, TRANSMISSION METHOD, RECEIVING APPARATUS, AND RECEIVING METHOD - A transmitting apparatus and method transmits different modulated signals from a plurality of antennas, and employs a configuration that includes a modulation section that obtains a modulated signal by performing signal point mapping of transmit bits using a signal point arrangement that is divided into a plurality of signal point sets on the IQ plane, whereby the minimum distance between signal points within a signal point set is smaller than the minimum signal point distance between signal point sets; and an antenna that transmits a modulated signal obtained by the modulation section. A signal point generating apparatus generates a first and second symbols to be transmitted by first and second antennas, respectively.12-13-2012
20120314802TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: encoding an information bit and generating a block coded with an NCBPSS bit; generating two sub-blocks by parsing the coded block; and transmitting the two sub-blocks to the transmitter. By preventing the bits that are contiguous to the encoding block from having continuous identical reliabilities on a signal constellation, the deterioration of the decoding performance of the transmitter can be prevented.12-13-2012
20120314799METHOD AND APPARATUS PROVIDING PROTECTION AND DC BALANCE IN A COMMUNICATION SYSTEM - A method and apparatus for controlling DC balance in a digital communication system in which data frames are transmitted, wherein the data frames include a header portion that is transmitted unscrambled and a payload portion that is scrambled before transmission. The header portion includes a frame counter field. A value for the frame counter field is randomly generated and an effect on the DC balance is estimated. It is then determined whether the estimated effect on the DC balance meets defined requirements for DC balance. When the estimated effect does not meet the defined requirements for DC balance, a new random value for the frame counter field is generated and checked. When the estimated effect meets the requirements, the randomly generated value is utilized in the frame counter field in transmitted data frames.12-13-2012
20120314797Distributed Antenna System Interface for Processing Digital Signals in a Standardized Format - An interface is provided for processing digital signals in a standardized format in a distributed antenna system. One example includes a unit disposed in a distributed antenna system. The unit includes an interface section and an output section. The interface section is configured for outputting a first complex digital signal and a second complex digital signal. The first complex digital signal is generated from a digital signal in a standardized format received from a digital base station. The output section is configured for combining the first complex digital signal and the second complex digital signal into a combined digital signal. The output section is also configured for outputting the combined digital signal. The combined digital signal comprises information to be wirelessly transmitted to a wireless user device.12-13-2012
20120314796METHOD OF SIGNAL EXCHANGE, METHOD OF BIT-SEQUENCE TRANSMISSION, AND BATTERY PACK - A first bit-sequence, which is to be transmitted from a control section to an authentication chip according to an encoding scheme that transmits each one and zero by a pulse with a width of 200 μsec and 100 μsec respectively, is converted to a second bit-sequence to be transmitted according to NRZ encoding. The converted second bit-sequence is stored in a register with the MSB of the second bit-sequence aligned in the MSB of the register. Timing to set the pulse width for transmission of a one or zero by NRZ encoding is performed repeatedly, and at the start of each timed interval, the signal transmission level output to the authentication chip is set corresponding to the value of the bit stored in the MSB of the register. After setting the signal transmission level, the register is shifted left one bit.12-13-2012
20120213311METHOD FOR GENERATING PLURALITY OF DM-RS SEQUENCES, COMMUNICATION TERMINAL DEVICE USING SAME, AND BASE STATION USING SAME - The present invention relates to a method for generating a plurality of demodulation reference signal (DM-RS) sequences, a communication terminal device using same, and a base station using same, which generate N DM-RS sequences by adding additional parameters having N (≧2) values or N numbers of cases after designing a basic DM-RS sequence for one or more layers. Thereby, each terminal can easily obtain layer information assigned thereto except for basic precoder information from DM-RS and can further predict interference and the like among terminals by obtaining layer information of other terminals.08-23-2012
20120213310METHOD FOR TRANSMITTING DATA IN MULITIPLE ANTENNA SYSTEM - A method of sending data in a multiple antenna system includes the steps of generating a transmission signal by applying channel-dependent precoding to a first antenna cluster and a second antenna cluster, each comprising a plurality of antennas, wherein the channel-dependent precoding is performed by a precoding weight matrix in which a precoding weight for each of the antenna clusters has a block diagonal form and the precoding weight is represented by P×V for a number of transmission antennas P, included in each of the antenna clusters, and a number of layers V applied to each of the antenna clusters (P and V are an integer greater than 0) and sending the transmission signal.08-23-2012
20120134440APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN DIGITAL VIDEO BROADCASTING SYSTEM - A method of operation of a transmitting node in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes generating a frame including a plurality of physical layer zones, each of the plurality of physical layer zones applying different Fast Fourier Transform (FFT) sizes and different pilot patterns; and transmitting the frame.05-31-2012
20120134439SEMICONDUCTOR DEVICE HAVING LEVEL SHIFT CIRCUIT - A semiconductor device includes: two level shift circuits having substantially the same circuit configuration; an input circuit that supplies complementary input signals to the level shift circuits, respectively; and an output circuit that converts complementary output signals output from the level shift circuits into in-phase signals and then short-circuits the in-phase signals. According to the present invention, the two level shift circuits having substantially the same circuit configuration are used, and the complementary output signals output from the level shift circuits are converted into in-phase signals before short-circuited. This avoids almost any occurrence of a through current due to a difference in operating speed between the level shift circuits.05-31-2012
20120134441WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, AND MOBILE STATION APPARATUS - By taking into account the power consumption and PH of a mobile station apparatus on an uplink, while communication quality is maintained, the efficiency of power consumption is improved. There are provided a PUSCH reception section 05-31-2012
20120163492DEVICE, SYSTEM AND METHOD OF WIRELESS COMMUNICATION OVER A PLURALITY OF WIRELESS COMMUNICATION FREQUENCY CHANNELS - Some demonstrative embodiments include devices, systems and/or methods of wireless communication over a plurality of wireless communication frequency channels. For example, a wireless communication device may include a frequency source to generate a source frequency signal; a plurality of local-oscillator (LO) generators to generate a respective plurality of different carrier signal frequencies based on the source frequency signal; and a plurality of radio-frequency (RF) paths to simultaneously communicate over the plurality of carrier signal frequencies, respectively.06-28-2012
20120163496METHOD AND APPARATUS FOR GENERATING PRE-CODING MATRIX CODEBOOK - This disclosure relates a method and apparatus for generating pre-coding matrix codebook. The method for generating pre-coding matrix codebook, comprising: acquiring a universal set of pre-coding matrixes in a first format; acquiring a universal set of pre-coding matrixes in a second format; selecting a first predetermined number of pre-coding matrixes in the first format from the universal set of pre-coding matrixes in the first format; and selecting a second predetermined number of pre-coding matrixes in the second format from the universal set of pre-coding matrixes in the second format, according to the selected first predetermined number of pre-coding matrixes in the first format.06-28-2012
20120163495SYSTEMS, DEVICES, AND METHODS FOR TRAINING SEQUENCE TRANSMISSION AND RECEPTION - A training sequence helps optimize SNR degradation in a wireless communication. Various sets of training sequences may be stored in a repository, and transmitters and receivers encoded with such sequences transmit at least one of the sequences between them as part of the wireless transmission of data.06-28-2012
20120163494APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING ADDITIONAL DATA USING TIME-DELAY INFORMATION OF SEQUENCE IN DIGITAL BROADCASTING SYSTEM - An apparatus for transmitting a main broadcasting signal and additional data in a digital broadcasting system includes: an orthogonal sequence generation unit configured to generate an orthogonal sequence having orthogonality with the main broadcasting signal; an orthogonal sequence delay unit configured to delay the generated orthogonal sequence according to inputted additional data; a signal mixing unit configured to mix the delayed orthogonal sequence with the main broadcasting signal and generate a mixed signal; and a transmission unit configured to transmit the mixed signal.06-28-2012
20120163493ULTRAHIGH FREQUENCY I/Q SENDER/RECEIVER USING MULTI-STAGE HARMONIC MIXER - A receiver using a harmonic mixer includes a signal receiver for receiving a first signal, a frequency generator for synchronizing a phase of the received first signal, down-converting a frequency size of the synchronized first signal as much as a first size, and outputting the down-converted signal as a second signal; a first harmonic mixer unit for receiving the first signal and the second signal, generating a third signal having a frequency size down-converted as much as a second size, and outputting the third signal. The receiver further includes a second harmonic mixer unit for receiving the third signal and outputting an In-phase signal having a frequency size down-converted as much as a third size, and a third harmonic mixer unit for receiving the third signal and outputting a Quadrature-phase signal having a frequency size down-converted as much as a third size.06-28-2012
20090060087DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD THEREOF - A digital broadcasting system and a data processing method thereof are provided. An apparatus for generating a transport stream includes a packet generator for generating a plurality of packets by compressing video and audio signals; a counter for counting the number of the generated packets and outputting the count result; and an information controller for determining whether the count result of counting reaches a predetermined number of packets, inserting packet start information into the packets according to the count result, and transmitting the packets with the packet start information inserted therein. The packet start information is added to a packet to be transmitted in a transmitter, and the packet start information is extracted from the received packet in a receiver, so that the waste of frequency resources can be reduced.03-05-2009
20090060086TERMINAL AWARE MULTICASTING - Methods, systems, and devices are described for using adaptive coding and modulation (“ACM”) to adaptively communicate with a plurality of data terminals having different capabilities. Embodiments provide hierarchical communications of content, generated by applying hierarchical pre-coding schemes to the source data and then associating the pre-coding levels with coding and modulation schemes of varying order. The pre-coding and/or coding and modulation may be based on one or more capabilities of the data terminals in the network. In some embodiments, data terminals may be used to cache certain data intended for other data terminals, for example, to allow time-shifted playback of the content on terminals with varying capabilities.03-05-2009
20090060084Data receiver apparatus and data transmitter apparatus - Write pointer generation units successively switch and indicate storage locations of data transmitted from a transmitter end LSI from plural buffers constituting FIFO circuits. A clock-step ring buffer delays a gated step signal to instruct an operation stop. When receiving the gated stop signal delayed by the clock-step ring buffer, the write pointer generation units stop switching instructions of the storage locations.03-05-2009
20090060085System and method for wrist band transmitter and system thereof - A light weight transmission device providing an identification signal is disclosed. In one aspect, the device comprises a gating device for controlling the transfer of information to the transmitter, a data retaining device, in communication with the gating device, receiving and storing the information for a known period of time, and a controller, in communication with the gating device, providing a signal to the gating device to enable transfer of the retained information to the transmitter at a known time and for a known period of time.03-05-2009
20120170679METHOD FOR TRANSCEIVING REFERENCE SIGNAL IN COMP OPERATION IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS AN MU-MIMO SCHEME - Disclosed is a method for efficiently transceiving information required for implementing a multi-cell-based CoMP MU-MIMO scheme. For this purpose, a base station which performs CoMP operation generates: (A) a reference signal sequence on the basis of a specific base station; or generates (B) the same reference signal sequence on the basis of a CoMP ID, and transmits the generated sequence to user equipment. To support an MU-MIMO scheme and to perform a joint processing method, the base station must additionally transmit CoMP reference signal sequence information, frequency shift information, etc. to the user equipment in said (A) case, and generates a CoMP reference signal on the basis of a preset CoMP set ID and transmits the generated signal to the user equipment in said (B) case.07-05-2012
20120170678METHODS AND APPARATUS FOR TRELLIS-BASED MODULATION ENCODING - Methods and apparatus are provided for trellis-based modulation encoding. A signal is modulation encoded by encoding one or more blocks of the signal using one or more corresponding edges in a trellis, wherein each edge in the trellis has a corresponding bit pattern; selecting a winning path through the trellis based on at least one transition-based run-length constraint; and generating an encoded sequence using edges associated with the winning path. Exemplary trellis pruning techniques are also provided. The winning path through the trellis is selected by minimizing one or more modulation metrics.07-05-2012
20120250787SYSTEM ACCESS AND SYNCHRONIZATION METHODS FOR MIMO OFDM COMMUNICATIONS SYSTEMS AND PHYSICAL LAYER PACKET AND PREAMBLE DESIGN - A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.10-04-2012
20100278281METHOD FOR TRANSMITTING INFORMATION IN A TELECOMMUNICATION SYSTEM FEATURING MULTIPLE FREQUENCY BANDS - A method for transmitting data in a telecommunication system including at least one communication network CNW11-04-2010
20120076234Method And Apparatus For Coding And Interleaving For Very High Throughput Wireless Communications - A wireless transmitter can include a plurality of bandwidth modules, each bandwidth module processing data based on a predetermined frequency band. In one embodiment, such a wireless transmitter can include encoding components for receiving transmit data and generating encoded data. A multiple-input multiple-output (MIMO) stream parser can receive the encoded data and generate a plurality of MIMO streams. A first module parser coupled to a first MIMO stream can generate a first plurality of partial MIMO streams. A first bandwidth module can include a first interleaver that interleaves bits of the first partial MIMO stream and generates first interleaved data. A second bandwidth module can include a second interleaver that interleaves bits of the second partial MIMO stream and generates second interleaved data. A first inverse fast Fourier transform (IFFT) unit can combine and process the first and second interleaved data and generate a first transmission MIMO stream.03-29-2012
20120076233APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA - A data transmission apparatus is provided. A symbol mapper performs symbol mapping on information about an optimum key index that instructs a modified Walsh-Hadamard matrix that causes a minimum peak-to-average power ratio and generates a plurality of key symbols. A modified Walsh-Hadamard transformer generates a plurality of modified Walsh-Hadamard-transformed data symbols by performing modified Walsh-Hadamard transform on a plurality of data symbols according to a modified Walsh-Hadamard matrix that an optimum key index instructs. An inverse Fourier transformer generates a plurality of inverse Fourier-transformed symbols by performing inverse Fourier transform on a plurality of key symbols and a plurality of modified Walsh-Hadamard-transformed data symbols. A transmitter transmits a plurality of inverse Fourier-transformed symbols to a channel through at least one antenna.03-29-2012
20120076232Coder and Decoder, Coding Method and Decoding Method, and System Comprising a Coder and a Decoder03-29-2012
20120076231RF DIVIDER USING DIRECT DIGITAL SYNTHESIS - An RF divider directly synthesizes a desired RF as a digital pattern that can be programmed and output at a VCO frequency. An exemplary RF divider comprises a pre-sequencer and a parallel-to-serial converter. The pre-sequencer successively outputs consecutive M-bit sections of a parallel word, where the parallel word comprises one or more copies of a frequency dividing bit pattern defining a frequency divisor. The parallel-to-serial converter performs a parallel-to-serial conversion on the M-bit sections of the parallel word based on the fixed radio frequency to generate an output signal having the desired radio frequency, where the output signal comprises a serial bit stream of the parallel word.03-29-2012
20120076230Receiver - An embodiment of the invention relates to a receiver capable of receiving a secondary bitstream which is transmitted by a secondary signal over a physical transmission channel together with a primary signal having higher signal strength than the secondary signal, said primary signal being generated according to a first transmission standard and said secondary signal being generated according to a second transmission standard, which differs from the first transmission standard; said receiver comprising: a down-converter configured to convert an input signal that contains said primary and secondary signal, to a baseband complex symbol stream; a first signal processing unit configured to process the baseband complex symbol stream and to provide a primary bitstream transmitted by said primary signal or a decoded primary log-likelihood ratio stream; a symbol reconstructing unit configured to process the primary bitstream or the decoded primary log-likelihood ratio stream and to provide a reconstructed primary symbol stream; a subtraction unit configured to provide a difference symbol stream by substracting the baseband complex symbol stream and the reconstructed primary symbol stream from each other, said difference symbol stream describing the baseband complex symbol stream without the primary signal; and a second signal processing unit configured to process the difference symbol stream and to provide the secondary bitstream transmitted by said secondary signal.03-29-2012
20120076229METHOD AND SYSTEM OF MIMO AND BEAMFORMING TRANSMITTER AND RECEIVER ARCHITECTURE - A multiple-input multiple-output (MIMO) receiver includes a receive path circuitry configured to receive a first signal from a first antenna and a second signal from a second antenna, downconvert the first signal to a first frequency to generate a first intermediate frequency (IF) signal, downconvert the second signal to a second frequency different from the first frequency to generate a second IF signal, and combine the first IF signal and the second IF signal into a common signal.03-29-2012
20120177141TRANSMISSION DEVICE, RECEPTION DEVICE, TRANSMISSION METHOD AND RECEPTION METHOD FOR WIRELESS COMMUNICATION SYSTEM - A transmission device for transmitting a signal in a wireless communication system is provided. The transmission device includes: a serial-to-parallel converter configured to convert an input serial bit stream into a parallel bit stream having three bits; and a phase rotation symbol mapper configured to map the parallel bit stream to a symbol having phase rotation characteristics, wherein when the parallel bit stream includes first to third bits, the phase rotation symbol mapper maps the second and third bits to a complex variable and sequentially maps a real number part and an imaginary number part of the complex variable to the front part and the rear part of a symbol in this order or to the rear part and the front part of the symbol in this order.07-12-2012
20120314805WIRELESS TRANSMITTING APPARATUS, WIRELESS RECEIVING APPARATUS, WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTING METHOD AND WIRELESS RECEIVING METHOD - To enable shared control information to be demodulated without requiring advance information on a MIMO block or non-MIMO block prior to demodulation of the shared control information of the block, and further enable the shared control information to be demodulated early. A wireless transmitting apparatus which performs wireless transmission in MIMO or non-MIMO for each radio frame comprised of a block or a plurality of blocks, and has mapping sections (12-13-2012
20120314798Closed Loop Precoding Weight Estimation - Embodiments herein relate to a method in a first communication node (12-13-2012
20080205545Method and System for Using a Phase Locked Loop for Upconversion in a Wideband Crystalless Polar Transmitter - Certain aspects of a method and system for using a phase locked loop (PLL) as a filter in a wideband crystalless polar transmitter may be disclosed. Exemplary aspects of the method may include modifying a clock signal generated by a voltage controlled oscillator within a phase locked loop. A modulated signal may be generated via a direct digital frequency synthesizer based on the modified clock signal. The modulated signal may be upconverted to a radio frequency (RF) signal utilizing a phase locked loop and the RF signal may be amplitude modulated. The phase locked loop may be enabled to filter the RF signal.08-28-2008
20100272210METHOD OF TRANSMITTING DATA FOR DIGITAL BROADCASTING IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting data in a wireless communication system includes mapping first data to first symbols on a signal constellation, mapping second data assisting the first data to second symbols on the signal constellation, modulating the first symbols and the second symbols, and transmitting the modulated first symbols and the second symbols, wherein the distance between the first symbols is longer than that between the second symbols on the signal constellation.10-28-2010
20100272213RADIOFREQUENCY TRANSMISSION SYSTEM - The invention relates to a radiofrequency transmission system comprising: means of producing at least one digital signal quantised on N bits; for each of said at least one digital signal, digital processing means including: Sigma-delta filters capable of producing, on the basis of a digital input signal quantised on N bits, a digital output signal quantised on M bits, where M is less than N; downstream from sigma-delta filters, means of repetition over-sampling; and downstream from over-sampling means, convolution means; digital-to-analogue conversion means capable of converting a digital output signal into an analogue signal; and analogue filtering means capable of filtering said analogue signal so as to select a narrow frequency band which includes the second frequency.10-28-2010
20100272211RADIO COMMUNICATION APPARATUS AND METHOD - A disclosed radio communication method includes precoding modulated information signal sequences to calculate transmit weight information, setting initial transmit power based on prior information including the calculated transmit weight information, generating an objective function of a user channel capacity for a constrained optimization problem based on the transmit weight information and the initial transmit power, generating a new objective function by adding a barrier function to the objective function, using an initial temporary barrier parameter to initiate iteration of an optimization operation for the new objective function, setting an initial barrier parameter based on comparison between the current and previous outputs, calculating transmit power to optimize the new objective function in accordance with an interior point method based on the initial transmit power and the initial barrier parameter and allocating the calculated transmit power to the respective transmit antennas.10-28-2010
20100272209METHODS OF JOINT CODING IN MOBILE COMMUNICATION SYSTEM - A joint coding method in a mobile communication system is disclosed. To block-code kχ-bit first data requiring a received signal quality and k2˜bit second data requiring a different received signal quality, the present invention includes configuring a first block code generation matrix meeting a first minimum hamming distance, configuring a second block code generation matrix meeting a second minimum hamming distance, and configuring a third block code generation matrix including the first block code generation matrix, the second block code generation matrix and a zero matrix of a specific size. Accordingly, the present invention encodes and transmits two data requiring different received signal qualities by one coding scheme, thereby enabling each data to have the required received signal quality in decoding.10-28-2010
20120219086SPECTRAL SHAPING OF MULTICARRIER SIGNALS - A method and apparatus are provided for generating and transmitting a multicarrier signal representing data symbols, where the multicarrier signal is a linear combination of subcarriers. The apparatus modulates base signals with the data symbols, where each one of the base signals is a weighted sum of the subcarriers, whereby each one of the subcarriers is weighted by an element of a weighting vector residing in a nullspace of a constraint matrix. The constraint matrix represents constraints limiting a magnitude of the multicarrier signal's Fourier transform at frequencies outside a designated bandwidth.08-30-2012
20120219085Extremely High Speed Broadband Access Over Copper Pairs - Disclosed is an apparatus that includes a plurality of parallel digital signal transmitters that each receive one of a plurality of digital sub-signals wherein each of the plurality of digital signal transmitters is configured to transmit one of the plurality of digital sub-signals that each have about the same bandwidth. The apparatus also includes a combiner coupled to the transmitters and configured to shift some of the plurality of digital sub-signals and to combine the plurality of shifted digital sub-signals into a combined digital signal that has a total bandwidth of that is approximately equal to the sum of the bandwidths of the plurality of digital sub-signals. The total bandwidth comprises a plurality of shifted bandwidths of the plurality of digital sub-signals at about the same offset with respect to each other. The combined digital signal is transmitted over a digital subscriber loop.08-30-2012
20090067535TRANSFER DEVICE - A transfer device for receiving packets that were transmitted by a device in a home network onto a transmission path, and transfers the received packet to another device. The stream to be transferred is classified into three types: (i) a type where each of packets constituting the stream is not attached with a time stamp; (ii) a type where each packet is attached with a valid time stamp; and (iii) a type where each packet is attached with an invalid time stamp. The transfer device determines, from among the three types, the type of the stream to be transferred, based on a transfer source device, transfer destination device, and provider of the stream. The transfer device then selects a transmission method by which to transfer the stream, among the time stamp attachment transmission method and the PCR reference transmission method.03-12-2009
20120257688TRANSMISSION AND RECEPTION APPARATUS AND METHOD - A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.10-11-2012
20120257689METHOD AND APPARATUS FOR CONFIGURING A CHANNEL USING DIVERSITY - The present invention discloses a method and an apparatus for configuring a channel using diversity. The method for configuring a channel using uplink diversity according to one embodiment of the present invention comprises the following steps: converting k-bit of information to be transmitted into n-bit, which is an encoded bit, so as to transmit predetermined information from the channel; selecting m-bit from among said n-bit and permitting T-number of transmitting antennas to generate T-number of modulation symbols so as to transmit said m-bit; and transmitting said T-number of modulation symbols as channel symbols from said T-number of transmitting antennas. In the step of generating the modulation symbols, the T-number of transmitting antennas generate the T-number of modulation symbols using R-number of different resources from each other.10-11-2012
20120257687HIERARCHICAL CODING FOR MULTICAST MESSAGES - Techniques for sending signaling information using hierarchical coding are described. With hierarchical coding, individual messages for users are encoded using multiple interconnected encoders such that (10-11-2012
20120257686METHOD FOR TRANSMITTING A SIGNAL - The method includes providing a stream of data to be transmitted, and processing the data by means of channel coding with a time-varying code rate, thereby generating a stream of channel coded data. The method further includes forming succeeding transmission time intervals and distributing the channel coded data on the transmission time intervals, and adjusting a transmission power of the signal to be transmitted by timely positioning a transmission power slope between two succeeding transmission time intervals so that the transmission power slope is contained completely within one transmission time interval of the two transmission time intervals, wherein the one transmission time interval comprises a lower nominal code rate or a lower nominal transmission power than the other one of the two transmission time intervals.10-11-2012
20120189080MULTIPLE ANTENNAS TRANSMIT DIVERSITY SCHEME - A method from transmitting data via multiple antennas. The method contemplates modulating data to be transmitted into a plurality of modulated symbols, encoding each pair of modulated symbols from among said plurality of symbols in accordance with a transmission diversity scheme to result in a plurality of 2 by 2 matrices, with each 2 by 2 matrix corresponding to each pair of modulated symbols, orthogonally spreading the plurality of 2 by 2 matrices to generate an output matrix, and transmitting the symbols in the output matrix via a plurality of antennas by using either a space time transmission diversity scheme, a space frequency transmission diversity scheme, or a combination of a space time transmission diversity scheme and a space frequency transmission diversity scheme.07-26-2012
20120328044COMMUNICATION APPARATUS, CONTROL PROGRAM FOR THE SAME, AND INTEGRATED CIRCUIT - In a radio communication method non-contiguously using a frequency, notification information is reduced, while suppressing an effect on performance. In a communication apparatus which switches between a communication method contiguously using a frequency and a communication method non-contiguously using the frequency, sets a parameter corresponding to each communication method, and performs radio communication, the communication apparatus sets a same parameter to an entire frequency band in the communication method contiguously using the frequency, while dividing a frequency band into a plurality of frequency bands and setting a different parameter for each divided frequency band in the communication method non-contiguously using the frequency. The communication method contiguously using the frequency and the communication method non-contiguously using the frequency mutually have different PAPR (Peak to Average Power Ratio) characteristics.12-27-2012
20120328043COMMUNICATION SYSTEM USING WIRELESS POWER - Provided are apparatuses, systems and methods for performing communication using wireless power. According to one general aspect, a communication device using wireless power may include: a controller configured to determine whether a mutual resonance occurs between a target resonator and a source resonator; and a modulator configured to modulate data based on whether the mutual resonance occurs.12-27-2012
20120263254METHOD FOR TRANSMITTING PILOT SIGNAL IN MULTI-CARRIER WIRELESS TRANSMISSION SYSTEM - The present invention provides a method for transmitting pilots in a multi-carrier wireless transmission system. A wireless time-frequency transmission block is composed of N consecutive OFDM symbols in time domain and M consecutive physical sub-carriers in frequency domain, N and M are integers those are greater than or equal to 1. The method includes: partitioning the wireless time-frequency transmission block into several areas, and determining the position of pilots, of which the total number is a preset number, according to the time-frequency domain balancing principle of pilots of various antennas in various areas; inserting pilots at the pilot positions of each antenna corresponding to the antenna for transmission. In accordance with the present invention, the simultaneous transmission of multiple antennas is supported in a wireless time-frequency transmission block of a multi-carrier wireless transmission system.10-18-2012
20120082261TRANSMISSION APPARATUS AND TRANSMISSION METHOD - A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme.04-05-2012
20120082260DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA - A digital broadcasting system and a data processing method are disclosed. Herein, additional encoding is performed on mobile service data, which are then transmitted, thereby providing robustness in the processed mobile service data, so that the mobile service data can respond more strongly against fast and frequent channel changes. The data processing method of a digital broadcast transmitting system includes the steps of forming a RS frame by grouping a plurality of mobile service data bytes that is being inputted, and performing error correction encoding in RS frame units, forming a super frame by grouping a plurality of the error correction encoded RS frame, performing row permutation in super frame units, and dividing the super frame back to RS frames, and dividing the RS frame into a plurality of data groups.04-05-2012
20090016464Method of and Generator for Generating Preamble Sequences in Communication Systems - A method forms a preamble sequence in a wireless communication system. The method comprises determining a value K related to a time-domain characteristic of the wireless communication system so that a time-domain preamble sequence includes a number of K waveforms similar in shape to one another having a linear phase shift, identifying a first preamble sequence for a first band, the first preamble sequence having a first length not dividable by K, identifying at least one second preamble sequence each for a second band, the at least one second preamble sequence having at least one second length, identifying the length of a third preamble sequence, the length of the third preamble sequence equal to a sum of the first length and the at least one second length, determining whether the time-domain characteristic is maintained when the one or more of the at least one second preamble sequence is concatenated with the first preamble sequence, modifying one or more of the at least one second preamble sequence if the time-domain characteristic is not maintained when concatenated, and forming the third preamble sequence by concatenating the first preamble sequence and the at least one second preamble sequence having one or more second preamble sequence modified.01-15-2009
20090016462Field bus application comprising several field devices - In a fieldbus application with multiple field devices, in addition to a fieldbus serving as a wire-based communication network (CN01-15-2009
20100296600VOLTAGE CONVERTING CIRCUIT AND RADIO COMMUNICATION APPARATUS - A common resistor is connected to load impedances that convert differential currents respectively generated by current sources into differential voltages. A constant current generated by the. current sources is supplied to the common resistor to cause the common resistor to generate an in-phase current and set a common potential.11-25-2010
20120230447WAVEFORM SCALING IN WIRELESS TRANSMITTERS - A wireless device for waveform scaling is disclosed. The wireless device includes a modulator that increases a magnitude of a peak digital code beyond a maximum available digital code for transmit power levels below a transmit power threshold to produce an adjusted digital code. The magnitude of the peak digital code is not increased beyond the maximum available digital code for transmit power levels above the transmit power threshold. The wireless device also includes a digital-to-analog converter that converts the adjusted digital code into an analog signal.09-13-2012
20100303169CHANNEL EQUALIZER AND METHOD OF PROCESSING BROADCAST SIGNAL IN RECEIVING SYSTEM - A channel equalizer includes an overlap unit, an estimator, a calculator, a compensator, and a save unit. The overlap unit overlaps a group of data packets in a broadcast signal. The group data packets include a head, a body, and a tail, and a known data sequence is periodically included in the body. The estimator estimates a CIR of each data region the body using the known data sequence, and it further estimates CIRs of data regions in the head or tail using the CIRs obtained for the data regions in the body. The calculator calculates equalization coefficients based on the CIRs estimated by the estimator, and the compensator compensates channel distortion of the overlapped data using the equalization coefficients. The save unit saves the compensated data.12-02-2010
20110122967METHOD AND DEVICE FOR COMMUNICATION BETWEEN MULTIPLE WIRELESS UNITS - A method and device for operating a wireless network comprising at least two user equipments, each comprising a transmitter and a receiver. A beacon frame is sent by a master user equipment at a transmit channel derivable from a user code. The beacon frame comprises a network code. Any user equipment may calculate a data channel by an algorithm using the user code and the network code. The user equipment may be an active user, which is permitted to send data over said data channel, or a passive user equipment, which only receives transmitted data at said data channel. Several active users may transmit simultaneously. Such active users are entered on a list at the beacon frame and is designated each a transmit channel. A passive user may become an active user, for example by pushing a button, whereupon the passive user is entered on the list of active user and at the same time takes over the task to send the beacon frame, i.e. becomes a master user.05-26-2011
20110122966SYSTEM AND METHOD TO ACCESS AND ADDRESS HIGH-SPEED INTERFACE CONVERTER DEVICES - High-speed transceiver devices, such as GBIC-type transceivers, are accessed and addressed. Identification information (including manufacturer name, model, compliance codes) is placed in data fields of the transceivers. An algorithm checks each port in each module of a host system to determine if a transceiver is present. If a particular transceiver is present, then algorithms store the port address of the transceiver in memory and enable the transceiver to be read from or written to. Reading from the transceiver includes reading the identification information, and writing to the transceiver includes writing the identification information. If a transceiver is initially determined not to be present or if the reading/writing/enabling processes fail, then a recovery process determines if the transceiver was present the last time it was checked. If it was present the last time, then the process continues to try to recover the transceiver data—otherwise, the port is marked as empty.05-26-2011
20110122965Offset Phase-Locked Loop Transmitter and Method Thereof - An offset phase-locked loop (PLL) transmitter comprises a clock generator that generates a first clock signal; a detector that detects a phase difference between an input data signal and a feedback data signal to generate a control signal; a controlled oscillator, coupled to the detector, that generates an output data signal according to the control signal; a mixer, coupled to the controlled oscillator and the clock generator, that mixes the output data signal according to the first clock signal to generate the feedback data signal; and a control circuit, coupled to the detector and the controlled oscillator, that adjusts the operating frequency curve of the controlled oscillator by one of a first step distance and a second step distance smaller than the first step distance such that the control signal is substantially equal to a predetermined value.05-26-2011
20080298495METHOD AND APPARATUS FOR GENERATING CORRECTED QUADRATURE PHASE SIGNAL PAIRS IN A COMMUNICATION DEVICE - A method and an apparatus (12-04-2008
20080298499METHOD FOR DETERMINING TARGET TYPE OF CONTROL SIGNALS IN MULTI-CHANNEL SYSTEM - The present invention discloses a method for determining a target type of a plurality of control signals respectively transmitted via a plurality of channels in a multi-channel system. The method includes: receiving a plurality of first control signals simultaneously from the channels during a first time period; determining a control signal priority corresponding to the first time period according to a target type determined by actual types of a plurality of second control signals respectively transmitted via the channels during a second time period, wherein the second time period is prior to the first time period; and determining the target type of the first control signals according to the control signal priority and actual types of the first control signals.12-04-2008
20080298497METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING UPLINK CHANNEL SOUNDING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting an uplink Channel Sounding (CS) Reference Signal (RS) channel in a wireless communication system. The method includes transmitting symbols of the CS RS channel through an entire system band in a previously selected at least one of Long Blocks (LBs) constituting one time slot of a subframe; and transmitting symbols of control channels through a predetermined band in LBs remaining after symbols of the CS RS channel are applied in the time slot, by applying an orthogonal sequence determined according to the number of LBs to which symbols of the CS RS channel are applied.12-04-2008
20080298496Text Encoding System and Method - The invention provides a method of encoding a binary data message for transmission over a data network. The method comprises allocating consecutive six bit sequences from the binary data message to consecutive respective bytes of an encoded data message; adding a predetermined bias value to some or all of the byte values of the encoded data message; and replacing respective selected data byte values in the encoded data message with one or more corresponding replacement data byte values. The invention further provides a method that comprises forming two or more message fragments from the binary message, each message fragment comprising respective bit sequences of the binary message; encoding each message fragment by the method outlined above to form two or more encoded message fragments; and adding a header to each encoded message fragment. The invention further provides an encoding engine for encoding a binary data message for transmission over a data network.12-04-2008
20110002413TRANSMITTER COVERAGE IDENTIFICATION USING A CONTINUOUS WAVE TONE - A methodology for transmitter identification for a single frequency network is provided using a single CW tone. The tone can be transmitted outside the transmitter's active band. It is possible to arrive at significant overlap between the tone coverage area and the coverage area of a neighboring transmitter without disturbing the operations by picking the tone location and power appropriately.01-06-2011
20110038437COMMUNICATION APPARATUS AND COMMUNICATION METHOD - Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S02-17-2011
20120321014SIGNAL PROCESSING CIRCUIT AND COMMUNICATION DEVICE HAVING THE SAME - An object of the present invention is to appropriately limit an amplitude of an IQ baseband signal having different average powers for respective frequency bands B12-20-2012
20110216849TRANSMISSION APPARATUS AND TRANSMISSION METHOD - A transmitter transmits data to a communicating opponent with a better channel condition with use of one or more frequency blocks including one or more carrier frequencies. The transmitter includes a communicating opponent selection unit evaluating the channel condition for each frequency block for each of plural communicating opponents and selecting one or more communicating opponents from the plurality of communicating opponents, a modulation scheme determination unit determining at least a modulation scheme depending on the evaluated channel condition, a control channel generation unit generating a control channel indicative of the determined modulation scheme and one or more frequency blocks available for the selected communicating opponents to receive a data channel, and a channel transmission unit providing the selected communicating opponents with the control channel and the data channel modulated in accordance with the modulation scheme.09-08-2011
20110228872METHOD AND APPARATUS FOR CREST FACTOR REDUCTION - According to embodiments there is provided a method for reducing the crest factor of an input signal. The method is performed in a part of a transmitter and comprises creating a clipped signal by clipping the input signal using a predetermined clipping threshold and creating a peak signal from the input signal. The peak signal comprises the difference between the input signal and the clipped signal. At least part of the peak signal is convoluted with an inverse Fourier transform of a filtering mask defined in the frequency domain. In this way a filtered signal is created. A subtraction signal is generated by subtracting the filtered signal from the input signal.09-22-2011
20110235747SIGNALING METHOD IN AN OFDM MULTIPLE ACCESS SYSTEM - A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.09-29-2011
20110235746SIGNALING METHOD IN AN OFDM MULTIPLE ACCESS SYSTEM - A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.09-29-2011
20110235745SIGNALING METHOD IN AN OFDM MULTIPLE ACCESS SYSTEM - A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.09-29-2011
20110235743METHOD AND BASE STATION FOR RECEIVING REFERENCE SIGNAL, AND METHOD AND USER EQUIPMENT FOR RECEIVING REFERENCE SIGNAL - A base station does not transmit any reference signal (RS) for channel measurement in a subframe in which transmission of an RS collides with transmission of a synchronization signal or a broadcast signal or in a resource block including the synchronization signal or the broadcast signal in the subframe. A user equipment assumes that any RS for channel measurement is not transmitted in a subframe or in a resource block when transmission of an RS collides with transmission of a synchronization signal or a broadcast signal in the subframe or in the resource block.09-29-2011
20110235740SIGNAL GENERATION DEVICE AND SIGNAL GENERATION METHOD - Disclosed is a signal generation device that employs a transmission method using inverse Fourier transform. The signal generation device includes: a modulation unit which modulates transmission data to obtain modulation data; a serial-parallel conversion unit which converts the modulation data input in series to parallel data of a predetermined size smaller than the size of inverse Fourier transform; a duplication unit which selects and duplicates all or a portion of the parallel data to obtain duplication data; a first time-axis shift unit which shifts the duplication data along the time axis to obtain time-axis shift data; and an inverse Fourier transform unit which carries out inverse Fourier transform on the parallel data obtained by the serial-parallel conversion unit and the time-axis shift data obtained by the first time-axis shift unit.09-29-2011
20100232543METHOD AND APPARATUS FOR SEQUENCING AND CORRELATING A POSITIONING REFERENCE SIGNAL - Aspects are disclosed for sequencing a positioning reference signal. A set of reference symbols associated with a reference signal are allocated, and a base sequence is generated. An extended sequence, which includes the set of reference symbols, is then provided according to the base sequence. The extended sequence is then transmitted in a sub-frame designated as an idle period. Aspects for correlating a positioning reference signal are also disclosed. A sequence of reference symbols is received from a base station during an idle period of the base station. A replicated sequence of reference symbols is generated, and a correlation is ascertained between a subset of the received sequence of reference symbols and a corresponding subset of the replicated sequence of reference symbols. The received sequence of reference symbols is then identified according to the correlation.09-16-2010
20100232544METHOD FOR ENCODING CONTROL INFORMATION IN A COMMUNICATION SYSTEM, AND METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING THE CONTROL INFORMATION - A method and apparatus is provided for encoding and transmitting control information in a communication system, in which a number of coded blocks for carrying the control information is determined based on a number of bits of the control information and a specific reference value. The number of information bits corresponding to the coded blocks is calculated based on the determined number of coded blocks, the number of parity bits to be punctured in the coded blocks is calculated, and a frame including at least one of the coded blocks is transmitted.09-16-2010
20100232542RADIO TRANSMITTING APPARATUS AND MULTICARRIER SIGNAL GENERATING METHOD - A base station allowing mobile stations to efficiently remove interference signals. In this base station (09-16-2010
20120321013Method for Communicating Data in xDSL Using Data Retransmission - In one embodiment, a method for communicating data is provided. The method includes defining a data transmission unit (DTU) to be sent in an xDSL data stream, defining a retransmit container as a time slot that corresponds to the DTU, maintaining, in a retransmit container, a copy of the DTU and an index corresponding to the retransmit container, the retransmit container being maintained at the second device independently of the first device, transmitting the DTU in the xDSL data stream, determining whether the DTU should be retransmitted, and if the DTU should be retransmitted: identifying the DTU by the retransmit container and retransmitting a copy of the DTU as identified by the retransmit container when the DTU reaches a predetermined position in the retransmission buffer.12-20-2012
20110249768PEAK SUPPRESSION DEVICE AND PEAK SUPPRESSION METHOD - A peak suppression device includes: a peak determination unit which determines a peak value of a waveform of an input signal; an impulse signal generation unit which generates an impulse signal corresponding to a difference between the peak value and a predetermined value if an absolute value of the peak value is greater than the predetermined value; a multiplication unit which multiplies the generated impulse signal by a predetermined impulse response waveform so as to generate a peak suppression signal; and a subtraction unit which subtracts the peak suppression signal from the input signal.10-13-2011
20120321016Communicating Over Single- or Multiple- Antenna Channels Having Both Temporal and Spectral Fluctuations - This inventions provides techniques for estimating both temporal and spectral channel fluctuations with the duration of a data symbol. Certain pulse shaping functions are Discrete Prolate Spheroidal Sequences (DPSSs) and are used primarily because of their relatively limited Inter-Symbol Interference (ISI) properties. During reception, these properties allow one or more parameters of a joint time-frequency channel model to be more easily determined. Once the one or more parameters are determined, they can be applied to received symbols to correct the temporal fluctuations, spectral fluctuations, or both of the channel over which a communication took place. The techniques may be adapted for the Multiple-In, Multiple-Out communication situation.12-20-2012
20120087440Method and Apparatus for Data Transmission Based on Coordinated Multiple Point Transmission - The present invention provides a method and an apparatus for transmitting data based on coordinated multiple point transmission and reception. The method includes: a transmitting point pre-configuring at least two coordinated multiple point transmission and reception policies; and the transmitting point determining a channel quality value of every cell according to received signals of multiple cells participating in coordinated transmission and reception; and selecting a corresponding coordinated multiple point transmission and reception policy according to the channel quality value of the cell, and transmitting a data stream to a receiving end according to the corresponding coordinated multiple point transmission and reception policy. In the present invention, when the channel quality is relatively poor, various cell participating in the coordinated multiple point transmission and reception transmit the same one data stream to ensure the data transmission and reception quality.04-12-2012
20120087439Modulation Method and Apparatus - Embodiments of the present invention disclose a modulation method and apparatus. The modulation method includes: processing at least two data blocks, and outputting at least two single-carrier Orthogonal Frequency Division Multiplex (OFDM) signals, where the at least two data blocks include a first data block and a second data block, the at least two single-carrier OFDM signals include a first single-carrier OFDM signal corresponding to the first data block and a second single-carrier OFDM signal corresponding to the second data block, a difference between a carrier center frequency RF04-12-2012
20120087438INTEGRATED CIRCUIT FOR RADIO TRANSMISSION - A radio transmitting device and method enables reduction of an increase of CGI memories for the control channel and an improvement of the throughput of the data channel. When multiplex transmission through the control channel and the data channel is carried out and when adaptive modulation is applied to both channels, an MCS selecting section (04-12-2012
20120087437Message Rearrangement For Improved Code Performance - A system and method for permuting known and unknown message bits before encoding to provide a beneficial rearrangement of bits. Such a method can improve distance properties in the resulting subcode. In various embodiments, the structure of a beneficial rearrangement is dependent on the parameters of how known and unknown bits are grouped and on the specific type of code being used. Given these two parameters, the message bits can be rearranged to more efficiently leverage any apriori knowledge.04-12-2012
20120087436TONE REORDERING IN A WIRELESS COMMUNICATION SYSTEM - In a method for generating an orthogonal frequency division multiplexing (OFDM) symbol to be included in a PHY data unit for transmission via a communication channel, wherein the OFDM symbol includes a plurality of OFDM tones, information bits to be included in the OFDM symbol are encoded to generate encoded information bits. The encoded information bits are parsed into a plurality of spatial streams. The spatial streams, or space-time streams generated from the spatial streams, are mapped to transmit chains using a plurality of spatial mapping matrices corresponding to the plurality of OFDM tones. Additionally, one of i) reordering OFDM tones before spatial mapping is applied, or ii) reordering OFDM tones after spatial stream mapping is applied and reordering spatial mapping matrices to match the reordered OFDM tones is performed. The OFDM symbol to be included in the PHY data unit is generated.04-12-2012
20120321015PREAMBLE FORMATS FOR MIMO WIRELESS COMMUNICATIONS - A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna, generating a carrier detect field. The method continues by, for a first grouping of the transmit antennas, generating a first guard interval, and at least one channel sounding field. Continuing, the method applies cyclical shift prior to transmission via the first grouping of the transmit antennas. When the MIMO wireless communication includes more than the first grouping of the transmit antennas, for another grouping of the transmit antennas. For the another grouping of the transmit antennas, generating at least one other channel sounding field. The method proceeds by generating the first guard interval prior to the at least one other channel sounding field, and applying another cyclical shift prior to transmission via the another grouping of the transmit antennas.12-20-2012
20110293036Communication signal generating device and communication apparatus for use in communication system - The communication signal generating device is for use in a communication system where communication signals each of which is set at a first level or a second level are exchanged among a plurality of communication apparatuses through a communication line. The communication signal generating device includes a switching element provided in a communication line to connect the communication line to a ground or a constant voltage source, and a driving means to generate a first communication signal at the first level by turning on the switching element to thereby pass a certain current to the communication line, and generate a second communication signal at the second level by turning off the switching element to thereby pass no current to the communication line. The driving means is configured to gradually increase an output impedance of the switching element during one bit time of the first communication signal.12-01-2011
20110305296USING A FIELD FORMAT ON A COMMUNICATION DEVICE - A communication device for transmitting a Very High Throughput Signal Field B (VHT-SIG-B) is described. The communication device includes a processor and instructions stored in memory that is in electronic communication with the processor. The communication device allocates at least twenty signal bits and six tail bits for the VHT-SIG-B. The communication device also uses a number of subcarriers for the VHT-SIG-B that is the same as a number of subcarriers for a Very High Throughput Long Training Field (VHT-LTF) and a DATA field. The communication device additionally applies a pilot mapping for the VHT-SIG-B that is the same as a pilot mapping for the DATA field. The communication device further transmits the VHT-SIG-B.12-15-2011
20120328045Time Varying Cyclic Delay Diversity of OFDM - Methods and apparatuses that apply a time-varying delay to symbols to be transmitted from one or more antennas are provided.12-27-2012
20120328047TRANSMISSION DEVICE, RECEPTION DEVICE, AND RADIO COMMUNICATION METHOD - A transmitting apparatus includes an OFDM modulator that generates a first modulation symbol by modulating a first information signal using a first modulation scheme, a signal point of the first modulated information signal being at a first position in an in-phase quadrature-phase plane. A second modulation symbol by modulating a second information signal using the first modulation scheme, and by changing a second position at which a signal point of the modulated second information signal is arranged to a third position in the in-phase quadrature-phase plane, and an OFDM modulation signal including the first modulation symbol and the second modulation symbol, wherein the OFDM modulation signal comprises a plurality of subcarriers.12-27-2012
20120328046TRANSMISSION APPARATUS, TRANSMISSION METHOD, RECEPTION APPARATUS, AND RECEPTION METHOD - A MIMO-OFDM transmission and reception apparatus is provided which allows high accuracy estimation of frequency offset, high accuracy estimation of a transmission path fluctuation and high accuracy synchronization/signal detection. A mapping section generates a plurality of OFDM signals. In these OFDM signals, some pilot carriers are assigned to the same carrier position and orthogonal sequences are assigned to the same time slot in the same carrier position.12-27-2012
20100220809Method for transmitting multi-antenna superimposed symbol and apparatus using the same - A method for transmitting symbols in a communication system, includes dividing N symbols to be transmitted at one time into 2 groups. A first processing is performed on each of a plurality of symbols in a first group in order to obtain a first group of superimposed symbols. A second processing is performed on each of a plurality of symbols in a second group to obtain a second group of superimposed symbols. Each of the first group of superimposed symbols is transmitted one by one by a first antenna, and corresponding symbols in the second group of superimposed symbols are transmitted by a second antenna. The first processing and the second processing respectively include a conjugate cancellation operation.09-02-2010
20100220806RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS AND WIRELESS COMMUNICATION METHOD - A radio transmitting apparatus, a radio receiving apparatus and a wireless communication method wherein the channel estimation precision can be improved without increasing the number of pilot signals when two different time-frequency multiplexed physical channel structures are used in an OFDM wireless communication system. A multiplexing part (09-02-2010
20100202562TRANSMISSION DEVICE, RECEPTION DEVICE AND RADIO COMMUNICATION METHOD - A transmitting apparatus includes a first OFDM modulator that generates a first OFDM modulation signal by modulating a first information signal using a first modulation scheme, the first OFDM modulation signal having a plurality of subcarriers. A second OFDM modulator generates a second OFDM modulation signal by modulating a second information signal using the first modulation scheme, the second OFDM modulation signal having a plurality of subcarriers, and that generates a third OFDM modulation signal by changing a second position in an in-phase quadrature-phase plane in which a signal point of the second OFDM modulation signal is positioned, to a third position, the third position being different from a first position in the in-phase quadrature-phase plane in which a signal point of the first OFDM modulation signal is positioned. A multiplexer generates a multiplexed signal to be transmitted in a common frequency band, by multiplexing the first OFDM modulation signal and the third modulation signal. A transmitter transmits the multiplexed signal.08-12-2010
20100202561METHOD AND APPARATUS FOR MODULATION AND LAYER MAPPING IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate improved modulation and coding techniques for a multiple-in multiple-out (MIMO) communication system. As described herein, data to be transmitted over a set of physical layers (e.g., corresponding to antennas, beams, etc.) can be processed such that encoding is performed on a per-codeword basis and modulation is performed on a per-layer basis, thereby mitigating performance degradation experienced by traditional systems due to layer imbalance. As further described herein, per-codeword code rate parameters and per-layer modulation parameters can be signaled to a device in various manners, such as through modulation and coding scheme (MCS) signaling, explicit code rate and/or modulation scheme signaling, relative code rate and/or modulation scheme signaling, or the like.08-12-2010
20100202559MULTIPLEXING AND CODING SCHEMES FOR MULTIPLE TRANSMIT ANTENNAS IN A WIRELESS COMMUNICATION SYSTEM - Techniques for transmitting data from multiple transmit antennas using space orthogonal resource transmit diversity (SORTD) are described. For the SORTD scheme, a different orthogonal resource may be assigned to each transmit antenna. Data may be sent from the multiple transmit antennas using multiple orthogonal resources. In one design, a UE may process at least one information bit (e.g., with joint or independent coding) to obtain first and second sets of at least one modulation symbol. The UE may process the first set of modulation symbol(s) for transmission from the first transmit antenna using a first orthogonal resource. The UE may process the second set of modulation symbol(s) for transmission from the second transmit antenna using a second orthogonal resource. Each orthogonal resource may include a different reference signal sequence or a different set of reference signal sequence and orthogonal sequence.08-12-2010
20100202558FAST SPECTRAL PARTITIONING FOR EFFICIENT ENCODING - Methods of spectral partitioning which may be implemented in an encoder are described. The methods comprise determining an estimate of bit requirements for each of a plurality of spectral sub-bands. These estimates are then used to group the sub-bands into two or more regions by minimising a cost function. This cost function is based on the estimates of bit requirements for each sub-band and the estimates may include estimates of code bit requirements and/or additional code bit requirements for each sub-band. These estimates may be determined in many different ways and a number of methods are described.08-12-2010
20100202557Digital IF Distribution Networks for Radio Communications - A radio apparatus comprising: a radio frequency processing module for converting radio frequency signals from an antenna to intermediate frequency signals; an intermediate frequency processing module located remotely from the radio frequency processing module, for receiving intermediate frequency signals and processing said signals according to at least one communications protocol; and a digital data link for connecting the radio frequency processing module and the intermediate frequency processing module, for transfer of the intermediate frequency signals.08-12-2010
20100202556APPARATUS AND METHOD FOR TRANSMITTING AND RECOVERING ENCODED DATA STREAMS ACROSS PHYSICAL MEDIUM ATTACHMENTS - An apparatus and method for transmitting and recovering encoded data streams across Physical Medium Attachments (PMA) are provided. The data stream includes a plurality of data blocks. The method of transmitting includes tagging at least some of the plurality of data blocks in the data stream. The method also includes splitting the data stream into first and second lanes of data blocks. The method further includes transmitting the first lane of data blocks to a first PMA and the second lane of data blocks to a second PMA.08-12-2010
20100260283DUTY-CYCLE MODULATED TRANSMISSION - A duty-cycle modulated bit signalling method and circuit, comprising: signaling bits by virtue of a duty-cycle ratio; wherein the duty-cycle ratio is varied dependent upon the transmission rate of the signalling. A bit period comprises a long phase and a short phase and the duty-cycle therebetween is varied such that the ratio between the duration of the long phase and the duration of the short phase is increased for decreasing transmission rate. The duty-cycle ratio is varied dependent upon the transmission rate of the signalling according to one or more ranges of transmission rate. In a higher transmission rate range the duty-cycle is defined as a fixed ratio, and in a lower transmission range the duty-cycle is defined by a fixed length of the short phase of the bit period.10-14-2010
20130010891Systems and Methods for Network MIMO - Multiple-Input Multiple-Output (MIMO) systems and methods are provided for enabling network MIMO among base stations (BSs) and a mobile station (MS). A BS configure a network MIMO zone based on an indication of at least one other BS eligible for network MIMO. The network MIMO zone is defined by resources having at least time and frequency dimensions allocated for master transmission under control of the BS, or slave transmission under control of the other BS eligible for network MIMO. The BS can transmit data on the network MIMO zone to the MS. Where there is no data to transmit to the MS, the BS may transmit data on the network MIMO zone to another MS. To configure the network MIMO zone, the BS may look up in a table combinations of the eligible BSs associated with the indication.01-10-2013
20130010890Message Synchronization Over A Stochastic Network - Methods and apparatus to communicate between a local component and a remote component, where the local component is connected to the remote component using a non-deterministic communication link. A local clock is synchronized with a remote clock to within a maximum offset. A rate message from the remote component is received at the local component, where the rate message includes a first time stamp. A data rate is adjusted using the rate message when the time of the local clock substantially matches a time determined using the first time stamp. A data message is sent to the remote component using the adjusted data rate, where the data message includes a second time stamp for use in processing data in the data message. In some implementations, the time determined using the first time stamp is also determined using information about a communication link delay and/or a clock offset.01-10-2013
20100150263METHOD AND SYSTEM FOR COMMUNICATING INFORMATION IN A DIGITAL SIGNAL - The present invention relates to a communication method, system and signal, and in particular to a method and system for communicating information in a digital signal. It has particular application to satellite or terrestrial packet-based multi-user radio communication systems. A method for communicating information in a digital signal comprising data symbols is disclosed, wherein the information is encoded in a sequence characteristic of pilot symbols distributed amongst the data symbols, such that a receiver is able to determine the sequence characteristic and retrieve the transmitted information. The invention allows information to be encoded into a sequence characteristic of pilot, symbols, rather than relying on modulating such information onto the pilot symbols themselves. This allows a significantly larger number of pieces of information to be transmitted than hitherto possible, and the technique is more resistant to large frequency errors than prior techniques.06-17-2010
20130016794TRANSMITTER INCLUDING CALIBRATION OF AN IN-PHASE/QUADRATURE (I/Q) MODULATOR AND ASSOCIATED METHODSAANM THOMPSON; Mark W.AACI FairportAAST NYAACO USAAGP THOMPSON; Mark W. Fairport NY USAANM DAMINSKI; Robert E.AACI RochesterAAST NYAACO USAAGP DAMINSKI; Robert E. Rochester NY USAANM PADALINO; Brian C.AACI RochesterAAST NYAACO USAAGP PADALINO; Brian C. Rochester NY US - A transmitter includes an input, a modulator, and a calibration memory configured to store discrete calibration test points. A compensator is coupled between the input and the modulator and cooperates with the calibration memory to cause the modulator to generate a respective calibration carrier signal for each of the discrete calibration test points during a calibration phase. A detector is coupled to an output of the modulator and is configured to determine respective calibration values of the calibration carrier signals during the calibration phase. A compensator calculator is coupled to an output of the detector, and is configured to generate compensation values for the compensator for use during an operation phase and based on the calibration values of the calibration carrier signals.01-17-2013
20130016795TRANSMISSION DEVICEAANM Kunihiro; KazuakiAACI TokyoAACO JPAAGP Kunihiro; Kazuaki Tokyo JPAANM Hori; ShinichiAACI TokyoAACO JPAAGP Hori; Shinichi Tokyo JPAANM Shiikuma; KazumiAACI TokyoAACO JPAAGP Shiikuma; Kazumi Tokyo JP - A transmission device includes a pulse modulated signal generator that generates a pulse-modulated signal by changing the width of a pulse or the density of a pulse according to the magnitude of the amplitude component of an input signal while discretely changing the pulse height according to the magnitude of the amplitude, a modulated-signal generator that generates a modulated signal by integrating the pulse-modulated signal and the phase component of the input signal, a power amplifier that includes at least as many amplifiers as the number of the discrete amplitude levels of the modulated signal, changes the number of amplifies that amplify the modulated signal on the basis of the value of the amplitude level of the modulated signal, combines outputs of the amplifiers, and outputs a combined output, and an output filter that eliminates a square-wave component from the output of the power amplifier.01-17-2013
20110158345PILOT TRANSMISSION METHOD IN A WIRELESS COMMUNICATION SYSTEM - A pilot transmission method in a wireless communication system is provided. The method includes: transmitting a first pilot for channel measurement through a first transmission section; and transmitting a second pilot for channel measurement through a second transmission section which is subsequent in time to the first transmission section, wherein the first transmission section and the second transmission section include a plurality of sub-bands, parts of the plurality of sub-bands use predetermined precoding whereas the remaining sub-bands use non-predetermined precoding, and any one of the first pilot and the second pilot is carried only on a sub-band which uses the predetermined precoding whereas the other pilot is carried on the entirety of the plurality of sub-bands.06-30-2011
20090103649Digital Broadcast Signaling Metadata - Embodiments are directed to transmitting L1 pre-signaling information with predetermined modulation and code rate such that L1 pre-signaling information can be received without preliminary knowledge on the network. L1 pre-signaling information makes it possible to receive the L1 signaling information, data link layer information, and notification data that may have configurable code rates and modulation. Therefore, L1 pre-signaling information can be thought of as signaling metadata (i.e., information about other signaling information). L1 signaling is divided into pre-signaling and signaling parts. The pre-signaling part includes parameters used for receiving the L1 signaling information. L1 pre-signaling signaling enables the receiver to receive the signaling itself (L1 signaling and data link layer information) by informing the receiver about the type of modulation, coding, and the like, used to transmit the L1 signaling, data link layer, and notification information.04-23-2009
20120243636SEMICONDUCTOR DEVICE AND MEMORY SYSTEM - A semiconductor device capable of communicating with a host apparatus includes a symbol generation unit, a coding unit, and a transmission unit. The symbol generation unit includes a random number generation circuit and generates a symbol according to a random number generated by the random number generation circuit. The coding unit performs 09-27-2012
20120243634Dual Carrier Modulation - An encoder arranged to encode a data symbol for transmission by means of two carrier signals in accordance with an encoding scheme having the properties that: for a first carrier signal, a plurality of data symbols are mapped to a single modulation point in a constellation of modulation points; and for a second carrier signal, said plurality of data symbols are each mapped to a different modulation point in the constellation of modulation points.09-27-2012
20120243633Data Encoding Based on Notch Filtering to Prevent Desense - In one embodiment, a data encoder for a component (such as an integrated circuit) may encode data to be transmitted from the component to another component in a system. The encoder may avoid one or more data patterns that, if transmitted by the component, may cause noise to occur at one or more specified frequencies (or frequency bands). The specified frequencies may be frequencies that are in use for wireless communication by the device. By avoiding noise at the specified frequencies, the desense that might otherwise occur may be reduced or eliminated. Quality and speed of the wireless communication may be increased.09-27-2012
20080253472Uart-Encoded Pulse-Modulation Technique - The settings of a UART-based infrared pulse-modulation remote control device are chosen such that the baud rates ensures a reliable communication with the infrared receiver of the controlled appliance.10-16-2008
20080240285SEQUENCE GENERATING METHOD FOR EFFICIENT DETECTION AND METHOD FOR TRANSMITTING AND RECEIVING SIGNALS USING THE SAME - A sequence generation method for allowing a reception end to effectively detect a sequence used for a specific channel of an OFDM communication system, and a signal transmission/reception method using the same are disclosed. During the sequence generation, an index is selected from among the index set having the conjugate symmetry property between indexes, and a specific part corresponding to the frequency “0” is omitted from a transmitted signal. In addition, a reception end can calculate a cross-correlation value between a received (Rx) signal and each sequence using only one cross-correlation calculation based on the conjugate symmetry property.10-02-2008
20080240283EXTENDED SERIAL COMMUNICATION PROTOCOLS - The present embodiments provide methods, systems and apparatuses that facilitate communication between two or more devices. Some of these methods identify a first communication to be transmitted and generate a first plurality of frames such that bit data of each of the frames of the first plurality of frames is different than the bit data of each of the other frames of the first plurality of frames, and that a first frame of the first plurality of frames include at least a first portion of the first communication. The first plurality of frames can then be transmitted.10-02-2008
20080232508Method of transmitting data in a communication system - A method of encoding a signal to be transmitted from a terminal via a channel in a communication network includes receiving the signal at the terminal; determining characteristics of the channel; encoding a first portion of the signal in accordance with a first encoding method to produce a first encoded signal portion; and encoding a second portion of the signal in accordance with a second encoding method to produce a second encoded signal portion. The first portion of the signal encoded in accordance with the first encoding method is dependent on the determined characteristics of the channel. The first encoded signal portion and the second encoded signal portion are transmitted via the channel.09-25-2008
20080232506Reception Device, Transmission Device, and Radio System - A transmitter using a plurality of pulse signals having different pulse sequence times, a receiver for steadily demodulating pulse signals of only desirable wave, and a wireless system are disclosed. In the transmitter, a control signal generating circuit outputs a control signal for generating a plurality of pulse signals having different pulse sequence generating times, a pulse generating circuit generates a plurality of pulse signals by using the control signal. In the receiver, reception front end receives the plurality of pulse signals having different pulse sequence generating times, delay circuit delays at least one of reception front-end output signals supplied from the reception front-end by a given time, delay pulse composition circuit combines delay signal with reception front-end output signal so that the receiver steadily demodulates the pulse signals of only the desirable wave.09-25-2008
20100086077CONCURRENT ENABLEMENT OF PERSISTENT INFORMATION UNIT PACING - Provided are a method, system, and article of manufacture, in which a logical path is established between a control unit and a channel over a fibre channel connection. Code for persistent information unit pacing is loaded into the control unit and the channel. An indicator is set in node descriptors of the control unit and the channel to indicate concurrent enablement of persistent pacing while retaining the established logical path between the control unit and the channel.04-08-2010
20080225980Transmission Signal Producing Apparatus - To suppress a noise component caused in conversion of digital data into an ASK modulated signal to be transmitted over a network. Based on a clock CL generated by a clock generation circuit (09-18-2008
20130142277COMMUNICATION METHOD AND APPARATUS USING CODEBOOK IN MIMO SYSTEM - A method and apparatus for transmitting and receiving signals using a codebook which maps each codeword to at least two different antennas is provided for a MIMO system. A transmission method includes mapping multiple codewords to multiple layers; mapping the multiple layers to multiple antennas using a precoding matrix selected from a rank-3 codebook which is designed to map the codewords to different antennas; and transmitting the codewords through paths formed by mapping the layers and the antennas. The precoding matrix of the rank-3 codebook is designed to equalize transmit power ratios between the antennas. The communication method and apparatus is advantageous to solve the problem of transmit power imbalance among the layers and the problem of performance degradation at the high SNR region in the conventional system using the rank-3 precoding matrices.06-06-2013
20130142278TRANSMITTER AND TRANSMISSION METHOD - A transmitter includes multiple transmit antennas, a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any of the transmit antennas, a precoding unit configured to weight the signal sequences with a precoding matrix selected from a codebook including multiple predefined precoding matrices, and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmit antennas and transmit the converted signals from the transmit antennas. The precoding unit applies distinct precoding matrices to different signal sequences, and an association between the distinct precoding matrices and the different signal sequences is determined through open-loop control being independent of a feedback from a receiver.06-06-2013
20130142279MULTICARRIER-SIGNAL RECEIVING APPARATUS AND MULTICARRIER-SIGNAL TRANSMITTING APPARATUS - A multicarrier-signal transmitting apparatus comprising a rotation-amount setting unit configured to set a phase rotation amount for each subcarrier of a plurality of subcarrier groups, the phase rotation amount being set with a setting selected from a first setting and a second setting, the first setting being such that the phase rotation amount is identical for a plurality of subcarriers within each subcarrier group, and the second setting being such that the phase rotation amount is identical for a plurality of subcarriers within a plurality of subcarrier groups; and a phase rotator configured to add a phase rotation to a data signal of said each subcarrier of said plurality of subcarrier groups based on the phase rotation amount.06-06-2013
20130142280MULTIPLE TRANSMIT ANTENNA INTERLEAVER DESIGN - An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.06-06-2013
20130170577MULTIMODE TRANSMITTER APPARATUS - Provided is a multimode transmitter apparatus that, in a case of using different paths to process modulated signals, can suppress the signal overlapping or loss that would occur during a path switching. In the apparatus, a baseband modulating unit (07-04-2013
20130170578METHOD FOR DETERMINING PRECODING MATRIX AND CORRESPONDING COMMUNICATION METHODS AND DEVICES - A method for determining precoding matrix for the sub-band precoding in a transmitter, wherein the transmitter has M transmitting antennas, and the method comprises: a. determining an optimized first matrix W07-04-2013
20130170579TRANSMISSION CIRCUIT, RECEPTION CIRCUIT, TRANSMISSION METHOD, RECEPTION METHOD, COMMUNICATION SYSTEM AND COMMUNICATION METHOD THEREFOR - In transmission of channel-coded serial data, early establishment of symbol synchronization between a transmitter and a receiver is achieved while reducing coding loss in transmission of valid data. In an idle period for not transmitting the valid data, a transmitting circuit selects first channel coding (e.g. 8B/10B coding) enabling early establishment of synchronization and transmits a synchronization symbol encoded using the first channel coding. In response to this, a receiving circuit establishes and maintains symbol synchronization. When the valid data is transmitted, the transmitting circuit transmits a symbol indicating a packet start position, selects second channel coding (e.g. 64B/66B coding) having less coding loss than the first channel coding, and transmits the valid data encoded using the second channel coding. Upon reception of the symbol indicating the packet start position, the receiving circuit switches to reception using the second channel coding and receives the valid data.07-04-2013
20130142276SYSTEMS AND METHODS FOR COMMUNICATION OVER A PLURALITY OF FREQUENCIES AND STREAMS - Methods and devices for communicating in a communication system are described herein. One aspect of the subject matter described in the disclosure provides a method of communicating over one or more space-time streams. The method includes transmitting a precoded portion of a first stream with a bandwidth of 1 MHz or less. The method further includes transmitting, when there are at least two streams, a precoded portion of a second stream with a cyclic shift delay, relative to the first stream, of 4 μs. The method further includes transmitting, when there are at least three streams, a precoded portion of a third stream with a cyclic shift delay, relative to the first stream, of 1 μs. The method further includes transmitting, when there are at least four streams, a precoded portion of a fourth stream with a cyclic shift delay, relative to the first stream, of 5 μs.06-06-2013
20130142274SLICED TRANSMITTER FRONT-END - An embodiment of the invention provides a sliced transmitter front-end (TX FE). The sliced TX FE includes first TX FE slices and a second TX FE slice that are connected in parallel. As a whole the first TX FE slices contributes a high-gain section to a superimposed gain range of the sliced TX FE. The second TX FE slice has a gain range that constitutes a low-gain section of the superimposed gain range of the sliced TX FE. A minimum gain of the gain range of the second TX FE slice is smaller than a minimum gain of the high-gain section.06-06-2013
20130142275SYSTEMS AND METHODS FOR COMMUNICATION OVER A PLURALITY OF FREQUENCIES AND STREAMS - Methods and devices for communicating in a communication system are described herein. One aspect provides a method of communicating over one or more space-time streams. The method includes transmitting a first stream with a bandwidth of 2 MHz or less. The method further includes transmitting, when there are at least two streams, a second stream with a cyclic shift delay relative to the first stream equal to half a period. The method further includes transmitting, when there are at least three streams, a third stream with a cyclic shift delay relative to one of the first and second stream equal to a quarter of the period. The method further includes transmitting, when there are at least four streams, a fourth stream with a cyclic shift delay relative to the other of the first and second stream equal to a quarter of the period.06-06-2013
20130177100OFDM TRANSMISSION/RECEPTION DEVICE FOR TRANSMITTING AND RECEIVING OFDM SYMBOLS HAVING A VARIABLE DATA TRANSMISSION RATE AND METHOD THEREOF - An orthogonal frequency division multiplexing (OFDM) transmission device transmits OFDM symbols to at least one reception device and includes an OFDM transmission processing unit which generates a plurality of OFDM symbols; a pilot insertion unit which inserts pilot tones into each of the plurality of OFDM symbols; and a control unit which controls the pilot insertion unit to insert the pilot tones according to a pilot insertion pattern which is selected to correspond to a communication environment from among a plurality of pilot insertion patterns.07-11-2013
20130177101TRANSMISSION DEVICE AND TRANSMISSION METHOD THEREOF, AND RECEPTION DEVICE - The present invention relates to a transmission device that enables transmission and reception of connected transmission channels in a 13-segment format and a transmission method of the transmission device, and to a reception device.07-11-2013
20130177102APPARATUS AND METHOD FOR TRANSMITTING DATA USING MULTIPLE ANTENNAS AND BEAMFORMING - Provided are an apparatus and method for transmitting data using multiple antennas and beamforming. The apparatus of the present invention comprises: a modulation unit which performs constellation mapping on input bits to generate modulated symbols; a pre-coding unit which multiplies a pre-coding matrix and the modulated symbols to generate pre-coded symbols; and a plurality of transmitting antennas for transmitting the pre-coded symbols. According to the present invention, a beam width is maintained constant, regardless of a radiation angle, thus preventing a loss of power caused by an angular spread and preventing the generation of shadow zone at a large radiation angle.07-11-2013
20110274206SYSTEM AND METHOD FOR RF SIGNAL COMBINING AND ADAPTIVE BIT LOADING FOR DATA RATE MAXIMIZATION IN MULTI-ANTENNA COMMUNICATION SYSTEMS - A system and method for generating weight values based on maximum data rate for weighting elements included within signal weighting and combining arrangements used in various multi-antenna transmitter and receiver structures is disclosed herein. Weighting values for a given signal combining arrangement are set so as to maximize an output data rate of the applicable multi-antenna system in the presence of adaptive bit loading of the subcarriers of a transmitted signal. The disclosed techniques may be employed to maximize a data rate of a multi-antenna communication system by using adaptive bit loading and RF and baseband weighting schemes. In this case a search is conducted over various combinations of RF and baseband weights in order to find the weight combination which, when adaptive bit loading is also employed, maximizes the data rate.11-10-2011
20110274205METHOD FOR TRANSMITTING REFERENCE SIGNAL IN DOWNLINK MULTI-INPUT MULTI-OUTPUT SYSTEM - Provided is a method for transmitting a reference signal (RS) in a downlink multi-input multi-output (MIMO) system which supports a first user equipment (UE) for supporting N transmission antennas from among a total of M transmitting antennas and a second UE for supporting M transmitting antennas (wherein, M>N). The method comprises the steps of: generating a subframe for simultaneously supporting the first UE and the second UE at a base station; transmitting the subframe; and mapping a common reference signal (CRS) for antenna port 0 to antenna port N−1, mapping a CRS for antenna port N to antenna port M−1, and controlling a power level of a CRS for antenna port 0 to antenna port N−1 and a power level of CRS for antenna port N to antenna port M−1, independently from one another, at the subframe.11-10-2011
20110274204APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND METHOD OF TRANSMITTING AND RECEIVING A SIGNAL - The present invention relates to method of transmitting and receiving signals and a corresponding apparatus. One aspect of the present invention relates to an efficient layer 1 (L1) processing method for a transmitter and a receiver using data slices.11-10-2011
20110274203Codebook With Nested Structure - A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.11-10-2011
20110274202APPARATUS AND METHOD FOR CHANNEL CODING IN A COMMUNICATION SYSTEM - A method for channel coding by a transmitter in a communication system is provided. The method includes determining a degree of coded bits of a Luby-Transform (LT) code based on a coding rate of a pre-code and the number of coded bits of the LT code, selecting at least one associated bit used for coding of the coded bits of the LT code from among information bits of the LT code, depending on the determined degree, and generating the coded bits of the LT code by applying a coding function to the selected associated bits.11-10-2011
20110274201DEVICE, METHOD AND SYSTEM OF WIRELESS COMMUNICATION OVER AN EXTREMELY HIGH RADIOFREQUENCY BAND - Disclosed is a method, circuit and system for wireless communication, including communication in an extremely high radio frequency range. There is provided a transmitter, such as an orthogonal frequency-division multiplexing (“OFDM”) based transmitter, which may transmit data in a frequency band residing within the range of 5 GHZ to 300 GHZ using transmission symbols.11-10-2011
20110274200METHOD FOR TRANSMITTING/RECEIVING DATA IN A MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM USING MULTI-CARRIER - A method for transmitting/receiving data in a Multiple Input Multiple Output (MIMO) communication system is disclosed. The data transmission method includes determining a precoding matrix to be a part of a phase-shift-based precoding matrix, determining a first diagonal matrix for phase shift to be a part of the phase-shift-based precoding matrix, determining a unitary matrix to be a part of the phase-shift-based precoding matrix, precoding a transmission symbol for each resource using the phase-shift-based precoding matrix to produce precoded data, and transmitting the precoded data, wherein the phase-shift-based precoding matrix is determined by the product of the precoding matrix, a Hermitian matrix of the unitary matrix, the first diagonal matrix, and the unitary matrix.11-10-2011
20110274199METHOD OF TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - The method includes generating coded bits by encoding information bits, dividing the coded bits into a first bit-stream and a second bit-stream, generating a first data symbol by performing anti-gray mapping on the first bit-stream, generating a second data symbol by performing gray mapping on the second bit-stream, and transmitting the first data symbol and the second data symbol. Reliability of bits can be improved in the first bit-stream and the second bit-stream by using different mapping schemes.11-10-2011
20120250786DIGITAL MODULATOR AND METHOD FOR INITIATING RAMP POWER TRANSITIONS IN A MOBILE HANDSET TRANSMITTER - A digital modulator for a portable handset using 8PSK or EDGE modulation with a direct launch transmitter is used to controllably adjust the transmit power of the portable handset. The digital modulator includes a controller coupled between a memory and an accumulator. The controller is responsive to an indication that the transmit power should be transitioned. The controller temporarily alters the data transferred from the memory to the accumulator during transitions of the transmit power level.10-04-2012
20120250785Adaptive Error Correcting Code for Data Communications Over a Plastic Optical Fibre - An efficient coding and modulation system for transmission of digital data over plastic optical fibres is disclosed. The digital signal is coded by a three-level coset coding. The spectral efficiency of the system is configurable by selecting the number of bits to be processed in each of the levels. The first level applies to the digital data a binary BCH coding and performs coset partitioning by constellation mapping and lattice transformations. Similarly, second level applies another binary BCH coding, which may be performed selectably in accordance with the desired configuration by two BCH codes with substantially the same coding rate, operating on codewords of different sizes. The third level is uncoded. The second and third levels undergo mapping and lattice transformation. After an addition of the levels, a second-stage lattice transformation is performed to obtain a zero-mean constellation. The symbols output from such three-level coset coder are then further modulated.10-04-2012
20120250784SYSTEM AND METHOD FOR ADAPTING A PIECE OF TERMINAL EQUIPMENT - A communication system (10-04-2012
20120250783Method and Apparatus for Communicating Data in a Digital Chaos Communication System - The present invention teaches method and apparatus to transform a featureless, unpredictable, and non-repeatable chaos waveform into digital chaos waveforms that maintain featureless characteristics to serve as a for wireless communications protocol, whereby unintended observers cannot detect or disrupt yet imprint a small measure of predictability and repeatability to aid intend observers in recovering embedded information.10-04-2012
20120250782DATA TRANSMISSION SYSTEM AND METHOD - A data transmission system includes a mobile originated device and at least one cloud server. The mobile originated device obtains information of at least one datum to be transmitted. The mobile originated device builds connections with several candidate mobile devices through a first wireless data transmission interface, and selects at least one target mobile device from the candidate mobile devices. The mobile originated device obtains target-mobile-device information of the target mobile device through the first wireless data transmission interface. The mobile originated device transmits the target-mobile-device information and the information of the datum to be transmitted to the cloud server through a second wireless data transmission interface. The cloud server assists the mobile originated device to transmit the datum to be transmitted to the target mobile device according to the target-mobile-device information and the information of the datum to be transmitted.10-04-2012
20080212711IQ-Imbalance - The invention relates to a method for correcting an IQ-imbalance (In-phase and Quadrature) of an IQ-based direct conversion receiver (09-04-2008
20130114756PUSCH Reference Signal Design for High Doppler Frequency - A method is provided for communication in a wireless telecommunication system. The method comprises transmitting, by a UE, a DMRS, wherein REs carrying the DMRS are separated into a plurality of portions, each of the portions occupying a different OFDM symbol in a single slot of a radio subframe. In one aspect, a new PUSCH DMRS format may provide accurate channel estimates, increased RS density in the time domain at the expense of relaxed PAPR, and/or a symmetric pattern to ease the channel estimation algorithm. The PUSCH DMRS format may provide sufficient RS density in the time domain to enable accurate channel estimation for high Doppler scenarios.05-09-2013
20130114754Dynamic Variable Inter-Symbol Interference (IS) Stress Impairment System - Embodiments of the present invention provide a variable inter symbol interference generator that generates a data signal having a variable amount of inter symbol interference by passing a data signal through (1) a programmable filter having an adjustable frequency response, and through (2) a fixed filter having a fixed frequency response such as a PCB trace, a length of cable, a discrete filter, or the like. By adjusting the parameters and therefore the insertion gain or loss of the programmable filter, and combining this with one or more fixed filters, a large range of continuously variable and finely tunable inter symbol interference amounts can be easily generated.05-09-2013
20130114755METHOD AND DEVICE FOR SUPPRESSING INTERFERENCE IN COMMUNICATION NETWORKS USING FREQUENCY SWITCHED TRANSMIT DIVERSITY CODING - Devices and methods for suppressing interference in inter-cell and intra-cell network communication. First and second received signals are received at a communication device, the first and second received signals comprising, respectively, reference signals and data signals. Estimated channel vectors are calculated from the first received signals, and estimated data covariance matrices are calculated from the second received signals. A plurality of combining weight vectors are determined based on the estimated channel vectors and the estimated data covariance matrices. The second received signals are then combined with the plurality of combining weight vectors to obtain a plurality of combined signals, wherein interference in the second received signals has been suppressed in the plurality of combined signals.05-09-2013
20130114760DATA PROCESSING APPARATUS AND METHOD FOR INTERLEAVING AND DEINTERLEAVING DATA - A data processing apparatus is arranged to map input data symbols to be communicated onto a predetermined number of sub-carrier signals of Orthogonal Frequency Division Multiplexed OFDM symbols. The predetermined number of sub-carrier signals is determined in accordance with one of a plurality of operating modes and the input data symbols are divided into first sets of input data symbols and second sets of input data symbols.05-09-2013
20130114759SYSTEM AND METHOD OF ENCODING AND TRANSMITTING CODEWORDS - Systems and methods are provided for encoding and transmitting codewords. A message is encoded in two encoders. For at least one of the two encoders, the message is algebraically modified prior to being encoded. In a specific example, the message is algebraically modified prior to being encoded in each of two traditionally non-systematic encoders, with the result that the output is equivalent to that of a turbo encoder.05-09-2013
20130094606MULTI-STAGE DIGITALLY-CONTROLLED POWER AMPLIFIER - A multi-stage digitally-controlled power amplifier (DPA) includes a radio-frequency (RF) clock input, an amplitude control word (ACW) input, a plurality of drivers, and an output stage. The RF clock input is arranged for receiving an RF clock. The ACW input is arranged for receiving a digital ACW signal. The drivers are coupled to the RF clock, and arranged for producing a plurality of intermediate signals, wherein at least one driver of the drivers is responsive to at least one bit of the digital ACW signal. The output stage is coupled to the intermediate signals, and arranged for producing an output signal.04-18-2013
20130094605Method and Arrangement for Conveying Additional Bits in a Communication System - Methods and nodes in a communication system for conveying N additional bits with a block of data. A method in an encoding node involves determining (04-18-2013
20130094604Precoding For Coordinated Multi-Point Joint Transmission - The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for implementing precoding for a coordinated multi-point joint transmission in LTE wireless systems using a specific product structure for a multi-point precoding matrix with designed and/or specified usage of multi-point codebooks for generating spatial data stream between a UE having multiple antennas and a plurality of cells.04-18-2013
20130094603DEVICE AND METHOD FOR ENCODING BITS TO SYMBOLS FOR A COMMUNICATION SYSTEM - A device and method for encoding bits to symbols for a communication system are described. In one embodiment, a method for encoding bits to symbols for a communication system includes receiving a set of N-bit data to be transmitted, where N is an integer, generating side scrambling values using a polynomial, scrambling the set of N-bit data using the side scrambling values to produce scrambled data, mapping the scrambled data to a particular set of M symbols from a plurality of sets of M symbols, where M is an integer and M is smaller than N, and outputting the particular set of M symbols for transmission over a transmission medium. Other embodiments are also described.04-18-2013
20130094609SYSTEMS AND METHODS FOR IMPLEMENTING RECEIVER TRANSPARENT Q-MODE - In a receiver transparent Q-mode, i.e., a Q-mode that is only implemented by a transmitter, the receiver is unaware of the Q-mode state of the transmitter. In this type of Q-mode configuration, the transmitter could enter and exit Q-mode as desired while the receiver, could, for example, continue to function as if operating normally, such as in “showtime.” Through this approach, it is not necessary for the receiver to detect the transmitter's entry and exit of Q-mode.04-18-2013
20130094608Communication System, Communication Apparatus and Communication Control Method - A communication system that applies different modulation methods to a first data portion and a second data portion which constitute communication data, includes: a receiving strength detection unit which detects a receiving strength of the communication data; a receiving strength transmission unit transmitting the receiving strength to a transmission portion which transmits the communication data; a receiving unit which receives the transmitted receiving strength; and a transmission power control unit which controls transmission power for transmitting each of the first and second data portions based on the transmitted receiving strength. Therefore, the communication system can improve the demodulation characteristics and reduce a power consumption of a communication apparatus at a receiving side04-18-2013
20130094607TRANSMITTER EMPLOYING PULLING MITIGATION MECHANISM AND RELATED METHOD THEREOF - A transmitter includes a power amplifier (PA) and a direct current (DC) voltage tuning circuit. The PA is arranged for receiving a radio-frequency (RF) clock derived from a clock source, and producing an output signal according to at least the RF clock. The DC voltage tuning circuit is arranged for tuning at least one DC voltage supplied to the PA for pulling mitigation of the clock source. A method of pulling mitigation of a source clock by a power amplifier (PA) includes adjusting a direct current (DC) voltage supplied to the PA.04-18-2013
20130101065METHOD AND ASSEMBLY FOR TRANSMITTING SENSOR SIGNALS - The invention relates to a method for transmitting sensor signals, comprising the following steps: a first sensor (04-25-2013
20130114758COMMUNICATION INTERFACE APPARATUS AND DISPLAY APPARATUS FOR REDUCING NOISE OF DIFFERENTIAL SIGNALS - A communication interface apparatus is provided. The communication interface apparatus includes a differential signal generation unit which generates a differential signal on the basis of a ground of a display apparatus; a transformer which amplifies a difference between the generated differential signal and the ground of the display apparatus at a preset ratio on the basis of a ground of an external apparatus; and an output unit which outputs the amplified differential signal.05-09-2013
20130114757METHOD AND APPARATUS OF TRANSMITTING PLCP HEADER FOR SUB 1 GHZ COMMUNICATION - Method and apparatus of transmitting PLCP header for sub 1 GHz communication is disclosed. A method of transmitting a physical layer convergence protocol(PLCP) header may comprise generating a short training field (STF) sequence over 1 orthogonal frequency division multiplexing (OFDM) symbol, transforming the STF sequence to repeated waveform patterns in time domain and transmitting the PLCP header comprising the STF sequence, wherein the STF sequence may be a sequence transformed to repeated waveform patterns in time domain by inverse discrete Fourier transform (IDFT).05-09-2013
20130129009TRANSPORT DATA REDUCTION FOR DAS SYSTEMS - A distributed antenna system having improved data transmission features incorporates endpoints of the system, which are coupled together by serial data link. At the endpoints, processing may occur utilizing processing circuitry to determine similarities between multiple signal streams. If the streams are similar, the data sent over the serial digital link is reduced by only sending one of the representative signals. In an alternative embodiment of the invention, the difference between the signals might be sent as well. Alternatively, all signals might be sent, but may be compressed with compression circuitry before the signals are transmitted over the serial link. At the endpoint of the system, the signals are reconstructed for further processing and transmission.05-23-2013
20130129014Method and Device for Sending and Receiving Precoded Signals on a Wireless Communication System - The present invention relates to a method for transmitting a precoded signal, the method comprising: determining a precoding matrix on the basis of the first matrix, which is determined from a first codebook including precoding matrices indicated by a first precoding matrix index (PMI), and the second matrix, which is determined from a second codebook including precoding matrices indicated by a second PMI; and transmitting the precoded signal using the determined precoding matrix to the receiver, wherein each precoding matrix contained in the first codebook is comprised of a block diagonal matrix, and individual blocks of the block diagonal matrix are configured independently of each other, and each precoding matrix contained in the second codebook is comprised of an upper element and a lower element, where the lower element includes a phase rotation value.05-23-2013
20130129015METHOD AND APPARATUS FOR TRANSCEIVING A BROADCAST SIGNAL IN A DIGITAL BROADCAST SYSTEM - The present invention relates to a method and apparatus for transceiving a broadcast signal in a digital broadcast system. The method for transmitting a broadcast signal according to one embodiment of the present invention comprises the following steps: generating a main signal using main data; generating an additional signal, the power of which is lower than that of the main signal, using a plurality of additional data; generating an additional signal frame using the additional signal and a frame header; and generating a broadcast signal using the main signal and an additional signal frame. The frame header is used in selectively extracting the plurality of additional data from the additional signal frame. According to the present invention, additional data can be efficiently transmitted while maintaining compatibility with existing digital broadcasting systems.05-23-2013
20130129010METHOD AND APPARATUS FOR MULTI-ANTENNA TRANSMISSION IN UPLINK - Method and apparatus for uplink transmission using multiple antennas are disclosed. A wireless transmit/receive unit (WTRU) performs space time transmit diversity (STTD) encoding on an input stream of a physical channel configured for STTD. Each physical channel may be mapped to either an in-phase (I) branch or a quadrature-phase (Q) branch. The WTRU may perform the STTD encoding either in a binary domain or in a complex domain. Additionally, the WTRU may perform pre-coding on at least one physical channel including the E-DPDCH with the pre-coding weights, and transmitting the pre-coded output streams via a plurality of antennas. The pre-coding may be performed either after or before spreading operation.05-23-2013
20130129011Transmission Of Precoding Codebook Over An Air Interface - Embodiments of the present invention include a system for transmitting a precoding codebook over an air interface. The system includes a first station configured to signal a set of indicators via at least one antenna to a second station from which the precoding codebook is derived at the second station based on the signaled set of indicators. The set of indicators includes less information than the precoding codebook.05-23-2013
20130129008METHOD AND DEVICE FOR CODEBOOK GENERATION AND DOWNLINK SIGNAL TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - The present invention relates to a method in which a base station transmits a downlink signal using 8 antennas may comprise the steps of: mapping a downlink signal to N (1≦N≦4) layers; precoding the signal mapped to the N layers, by using a specific precoding matrix selected from a pre-stored codebook; subjecting the precoded signal to processing for OFDM symbol generation; and transmitting OFDM symbols through 8 antennas. The pre-stored codebook may comprise precoding matrices for the respective ranks corresponding to N, the pre-stored codebook may consist of 16 codebook indexes, and a portion of the precoding matrices for high ranks in the 16 codebook indexes may be generated from the precoding matrices for low ranks.05-23-2013
20130129006Transmitter to Generate an Analytic Signal for Reduced Inter-Symbol Interference (ISI) - A transmitter including a signal generator to generate an analytic signal in frequency domain, having frequency components that when converted to time domain result in a time domain signal with a preamble that includes a first half of containing non zero information and a second half containing only zero data. A shaper configured to generate a cyclic prefix including only zero data based on the second half of the preamble included in the time domain signal, and to attach the cyclic prefix including only zero data to the time domain signal to output a pilot signal that is to be transmitted via an antenna.05-23-2013
20130129005METHOD AND SYSTEM FOR LOW LATENCY RADIO FREQUENCY WAVE TRANSMISSION - An approach is provided for low latency radio frequency wave transmission. A long haul transport network receives a first signal representing latency sensitive data, receives a second signal representing latency insensitive data, and combines the first signal and the second signal to output a combined radio frequency signal, wherein the latency sensitive data of the combined radio frequency signal are at a first level of error coding, and the latency insensitive data of the combined radio frequency signal are at a second level of error coding.05-23-2013
20130136205Adaptive Two-Dimensional Channel Interpolation - A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).05-30-2013
20130136207TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: encoding an information bit and generating a block coded with an NCBPSS bit; generating two sub-blocks by parsing the coded block; and transmitting the two sub-blocks to the transmitter. By preventing the bits that are contiguous to the encoding block from having continuous identical reliabilities on a signal constellation, the deterioration of the decoding performance of the transmitter can be prevented.05-30-2013
20110216845RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit (09-08-2011
20110211650Method and apparatus rate shaping - A method for performing a rate shaping of multiple data streams which are to be transmitted through a network, said network having the capability to perform a rate shaping using a first rate shaping scheme and at least one other rate shaping scheme other than said first rate shaping scheme, wherein said first rate shaping scheme has a smaller impact on the quality of the data stream than said at least one other rate shaping scheme but requires more computational resources than said at least one other rate shaping scheme, said method comprising:09-01-2011
20110222624Methods and Apparatuses for Multiple Access in a Wireless Communication Network using DCT-OFDM - The present invention provides an advantageous transmitter apparatus and associated method, for generating a Single-Carrier Discrete Cosine Transform (SC-DCT) OFDM signal for transmission. These transmit-side innovations include circuit configuration and signal processing methods for mapping K09-15-2011
20080198944POWER TRANSMISSION APPARATUS IN WIRELESS COMMUNICATION SYSTEMS - An envelope elimination and restoration power transmission apparatus in a wireless communication system is provided. The apparatus comprises a signal processor for dividing a transmission signal into a size component and a phase component and for generating a control signal for controlling a current of a bias modulator according to the size component, the bias modulator for amplifying the size component according to the control signal supplied from the signal processor, for lowering an impedance characteristic of the amplified size component and for outputting the amplified size component, a frequency modulator for modulating the phase component into a radio frequency (RF) signal, and a power amplifier for amplifying the RF signal by using an output signal of the bias modulator as a bias voltage. As provided, the transmission apparatus reduces a memory effect due to an impedance difference in a modulation frequency band.08-21-2008
20110228876DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA - The present invention relates to a digital broadcasting system for transmitting/receiving a digital broadcasting signal and a method of processing data. In one aspect of the present invention provides a method of processing data, the method including receiving a broadcasting signal in which mobile service data and main service data are multiplexed, demodulating the received broadcasting signal, obtaining an identifier indicating that data frame of the broadcasting signal includes service guide information, decoding and storing the service guide information from the data frame; and outputting a service included in the mobile service data according to the decoded service guide information.09-22-2011
20110243271TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND COMMUNICATION SYSTEM FOR FORMATTING DATA - A transmitting apparatus, a receiving apparatus, and a communication system are provided that allow a reduction in a frame loss due to interference caused by use of the same channel. A transmitting apparatus disposed in a base station includes a GPS receiver for receiving a GPS signal, a timing generator for controlling respective function blocks in accordance with the GPS signal and an inter-base-station control signal so as to precisely synchronize the timing of frame transmission among base stations, the front-end transmission processing unit including for converting transmission information into transmission time slots, a frame generator for generating a frame including a plurality of time slots and one frame guard, and a back-end transmission processing unit for transmitting the generated frame as a radio signal.10-06-2011
20110243270METHOD AND APPARATUS OF SHARING SIGNAL TRANSMISSION PORT BETWEEN DIFFERENT SIGNAL PROCESSING OPERATIONS - An exemplary signal processing apparatus includes a signal transmission port, a first signal processing circuit, a second signal processing circuit, and a control circuit. The signal transmission port is shared between a first signal processing operation and a second signal processing operation. The first signal processing circuit performs the first signal processing operation, wherein when the signal processing apparatus operates, the first signal processing circuit is not required to be consistently enabled to use the signal transmission port for signal transmission. The second signal processing circuit performs the second signal processing operation, wherein the signal transmission port is not always required to carry out signal transmission each time the second signal processing circuit is enabled to perform the second signal processing operation. The control circuit selectively enables the first signal processing circuit or the second signal processing circuit.10-06-2011
20110243269TRANSMITTER AND RECEIVER - The transmitter includes a first bit generator, a modulator, a second bit generator and a bit converter. The first bit generator generates bits to be transmitted based on the first wireless scheme. The modulator for the first wireless scheme performs at least amplitude modulation of a multiple level on the bits generated by the first bit generator. The second bit generator generates a bit to be transmitted based on the second wireless scheme. The bit converter converts the bit generated by the second bit generator and inputs converted bits to the modulator wherein the bit converter converts the bit generated by the second bit generator so that a signal showing High in the second wireless scheme is modulated to amplitude of a high level in the multiple level in the modulator.10-06-2011
20130136206RADIO COMMUNICATION SYSTEM - A transmission apparatus in a radio communication system which simultaneously uses a plurality of different radio frequencies to transmit signals. The apparatus includes a radio format setting portion, which is provided for each transmission frequency of the plurality of different radio frequencies and separately sets a radio format of transmission signals for each transmission frequency; and a transmitter, which is provided for each transmission frequency of the plurality of different radio frequencies and transmits signals at each of said transmission frequencies. Each radio format setting portion sets a pilot length of the transmission signals separately for each transmission frequency of the plurality of different radio frequencies.05-30-2013
20110235744PILOTS FOR MIMO COMMUNICATION SYSTEMS - Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot.09-29-2011
20110235742HIGH POWER PULSE GENERATOR - A systems, pulse generators, apparatus and methods for generating a high power signal are presented. A pulse generator includes a generator and a modulator unit. The generator generates a bipolar signal. The modulator unit modulates the bipolar signal with oscillating signals to generate a modulated bipolar signal with oscillating portions. The frequency spectrum of the modulated bipolar signal contains very little to no direct current (DC) component.09-29-2011
20110235741RADIO COMMUNICATION APPARATUS - A radio communication apparatus includes a baseband signal generator to generate digital data; a clock generator to generate 209-29-2011
20110235739FREQUENCY CONVERTER AND TRANSMITTER - A frequency converter includes a first pair of transistors including first and second transistors, a second pair of transistors including third and fourth transistors, and a variable impedance circuit. The first transistor includes source terminal being connected to positive-phase input terminal, drain terminal being connected to positive-phase output terminal, and gate terminal being supplied with positive-phase local signal. The second transistor includes source terminal being connected to positive-phase input terminal, drain terminal being connected to negative-phase output terminal, and gate terminal being supplied with negative-phase local signal. The third transistor includes source terminal being connected to negative-phase input terminal, drain terminal being connected to positive-phase output terminal, and gate terminal being supplied with negative-phase local signal. The fourth transistor includes source terminal being connected to negative-phase input terminal, drain terminal being connected to negative-phase output terminal, and gate terminal being supplied with positive-phase local signal.09-29-2011
20110255634PULSE WIRELESS COMMUNICATION DEVICE - To provide a microwave/milliwave UWB pulse wireless communication device that enables realization of structural simplification, high performance, compact integration, easy design, low power consumption, and low cost. A radiation type oscillator is configured by a radiation type oscillator substrate S10-20-2011
20110255631METHODS AND APPARATUS FOR FAST SYNCHRONIZATION USING TAIL BITING CONVOLUTIONAL CODES - For use in a wireless communication network, a transmitter is configured to encode a message field in a control channel message by cyclically shifting the control channel message according to the value of the message field. The transmitter includes a CRC (cyclic redundancy check) encoder configured to encode the control channel message using a cyclic redundancy check. The transmitter may also includes a CIF (carrier indication field) encoder configured to encode a carrier indication value in the control channel message by cyclically shifting the control channel message according to the carrier indication value configured to indicate an intended component carrier of the control channel message. Alternatively, the transmitter may also include a frame timing encoder configured to encode frame timing in the control channel message by cyclically shifting the control channel message according to the frame timing.10-20-2011
20130148758FILTER CIRCUIT, SEMICONDUCTOR INTEGRATED CIRCUIT, COMMUNICATION APPARATUS, SEMICONDUCTOR DEVICE, AND SYSTEM - A filter circuit includes two parallel digital filters, a DAC, and an LPF. The DAC includes two parallel decoders, a parallel-to-serial converter, a switch driver, and a switch. A PLL circuit supplies a reference clock to the DAC. A frequency divider provided in the DAC divides the frequency of the reference clock by two, and supplies the half frequency clock to a parallel processing section (the two decoders and the parallel-to-serial converter) of the DAC and the two digital filters. This makes it easy to secure a timing margin, permitting use in high-speed communication on the order of several GHz.06-13-2013
20100290557METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic.11-18-2010
20120275541APPARATUS AND METHOD FOR GENERATING A DATA STREAM AND APPARATUS AND METHOD FOR READING A DATA STREAM - When generating a data stream, text data, an escape-start-sequence, a first number of data units, an escape-continuation-sequence and a second number of data units are entered into a data stream. A base decoder displays only the text data and skips the data units referenced by the escape-start-sequence and the escape-continuation-sequence, while an extension decoder reads those data units and processes them together.11-01-2012
20120275540METHOD AND APPARATUS FOR SUBCARRIER AND ANTENNA SELECTION IN MIMO-OFDM SYSTEM - A method and apparatus for radio resources control in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system are disclosed. A channel metric is calculated for each of a plurality of transmit antennas. Sub-carriers are allocated to each transmit antenna in accordance with the channel metric of each transmit antenna. Signals are transmitted using the allocated sub-carriers at each antenna. Adaptive modulation and coding and transmit power control of each sub-carrier may be further implemented in accordance with the channel metric. Power control may be implemented per antenna basis or per sub-carrier basis. In performing power control, a subset of transmit antennas may be selected and waterpouring may be applied only to the selected antennas. Waterpouring may be based on SNR instead of channel response.11-01-2012
20120275539OFDM TRANSMITTER WITH VARIABLE CODE BLOCK INTERLEAVER AND METHOD FOR OFDM COMMUNICATIONS WITH VARIABLE CODE BLOCK SIZES - A multi-antenna transmitter is configured for orthogonal frequency division multiplexed (OFDM) communications. The multi-antenna transmitter includes circuitry to receive an input bit sequence for code block segmentation including adding filler bits based on a selected code block size, a encoder to encode the bit sequence and an interleaver configurable to perform interleaving operations on blocks of bits of various code block sizes of the bit sequence. A controller is to select the code block size for the interleaver and OFDM transmitter circuitry to transmit OFDM symbols on subcarriers utilizing more than one antenna. The OFDM symbols are generated at least in part from the interleaved blocks.11-01-2012
20120275538Method and System for Utilizing Givens Rotation Expressions for Asymmetric Beamforming Matrices in Explicit Feedback Information - Aspects of a method and system for utilizing Givens rotation expressions for asymmetric beamforming matrices in explicit feedback information are presented. In one aspect of the invention, Givens matrices may be utilized to reduce a quantity of information communicated in explicit feedback information via an uplink RF channel. The explicit feedback information may include specifications for a feedback beamforming matrix that may be utilized when transmitting signals via a corresponding downlink RF channel. The feedback beamforming matrix may represent a rotated version of an un-rotated matrix. The Givens matrices may be utilized to apply one or more Givens rotations to un-rotated matrix. The feedback beamforming matrix may be computed based on a matrix product of a plurality of Givens matrices. The feedback beamforming matrix may be encoded utilizing fewer bits than may be required to encode the un-rotated matrix.11-01-2012
20130129007Transmitter to Generate an Analytic Signal for Reduced Inter-Symbol Interference (ISI) - A method including receiving a received signal in time domain and obtaining a cyclic prefix (CP) correlation on the received signal, the CP correlation including spectral components associated with a plurality of possible cyclic prefix lengths; converting the obtained CP correlation to frequency domain; distinguishing spectral components associated with a first cyclic prefix length from spectral components associated with a second cyclic prefix length; calculating a first metric based on the spectral components associated with the first cyclic prefix length, and calculating a second metric based on the spectral components associated with the second cyclic prefix length; setting an order of cyclic prefix lengths based on a comparison of the first metric and the second metric with a threshold, the order including the first cyclic prefix length and the second cyclic prefix length; and completing a synchronization process based on the order of the cyclic prefix lengths.05-23-2013
20100316162TRANSMITTING APPARATUS AND METHOD IN MOBILE COMMUNICATIONS SYSTEM - A transmitting apparatus in a mobile communications system is disclosed. The apparatus includes: a data modulating unit which maps a predetermined number of data sets to one or more reference signal points of a symbol constellation; an inverse Fourier transforming unit which inverse Fourier transforms a data-modulated signal, generating a time-domain signal; a peak suppressing unit which suppresses the time-domain signal such that a peak power decreases when the time-domain signal meets a predetermined condition; a Fourier transforming unit which Fourier transforms the peak-suppressed signal and generates a frequency-domain signal; and a modifying unit which modifies the frequency-domain signal, and provides the modified signal to the inverse Fourier transforming unit, wherein the modifying unit is arranged to move, when a peak-suppressed signal point in the symbol constellation does not belong to a predetermined surrounding area, the peak-suppressed signal point to a point within the surrounding area.12-16-2010
20100316161METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING DATA USING SATELLITE CHANNEL - A method for transmitting data using a satellite channel includes: channel-encoding bit data using an e-BCH code; interleaving the encoded data; modulating the interleaved data according to a CPM scheme using four symbols; and transmitting the modulated data to a hub station.12-16-2010
20100316160 METHOD OF TRANSMITTING CONTROL CHANNEL INFORMATION IN AN OFDM COMMUNICATION SYSTEM DOWNLINK - In a method of transmitting control channel symbols in an OFDM communication system downlink in each sub-frame, the OFDM communication system including one or more transmit antennae, for each transmit antenna, each of the OFDM symbols of a control channel which are to be transmitted over the air is mapped to each of the corresponding non-punctured logical resource elements of one virtual control resource block VCRB12-16-2010
20100316159L1 CONTROL SIGNALING FOR UTRAN HSDPA - A Level-1 (L1) signaling flag is mapped to unused (invalid) bit sequences in Part 1 of the HS-SCCH—that is, Part 1 bit encodings that are not defined in the UTRAN specifications—and a corresponding L1 command is encoded in Part 2. This allows UE to detect early that the HS-SCCH is pure L1 signaling, and the UE may avoid wasting power by not processing an accompanying HS-PDSCH. Alternatively, in CPC HS-SCCH-less mode, the UE may blind decode the HS PDSCH. In one embodiment, a general DRX mode is defined and controlled via L1 signaling. In one embodiment, a UE acknowledgement improves the L1 signaling accuracy. In one embodiment, a L1 signal and UE acknowledgement protocol are utilized to “ping” a UE.12-16-2010
20130156127OFDM Synchronization and Signal Channel Estimation - Synchronization and signal channel estimation is accomplished by adding pilot signals to the outputs of IFFT encoders, i.e. after encoding of data/symbols, in a spread spectrum wireless communication system utilizing uniquely designed OFDM transmitters, OFDM receivers and OFDM systems and methods.06-20-2013
20130156128Transmission Device, Communication System, Transmission Method and Program - A transmission device of the present invention includes a baseband waveform generator to generate a transmission signal by using a transfer function H06-20-2013
20120281785Apparatus and Method for Producing a Multi-Pattern Wireless Frame - Multi-pattern transmission of frames. The method of operations comprises transmitting a first portion of a frame using a first radiation pattern. The frame comprises one or more preambles and a single data portion associated with the one or more preambles. Thereafter, an operation is conducted to switch the radiation pattern from the first radiation pattern, used to produce the first portion of the frame, to a second radiation pattern. A second portion of the same frame is produced using the second radiation pattern.11-08-2012
20120281784CORRECTION OF ANALOG DEFECTS IN PARALLEL ANALOG-TO-DIGITAL CONVERTERS, IN PARTICULAR FOR MULTI-STANDARD, SOFTWARE-DEFINED RADIO, AND/OR COGNITIVE RADIO USE - The present invention relates to signal processing in an analog-to-digital converter comprising a time-interleaved multi-channel architecture. According to the invention: digital filtering (H(z)) is applied in each channel, at least to estimate a converter offset error, and a compensation for the offset is applied on the basis of the estimated offset error. Advantageously, it is possible to benefit from the presence of a digital filter (H(z)) that is usually used to filter the quantization noise, such as a comb filter in converters that have sigma/delta modulators, in order to estimate the offset. The same filtering can then be applied in order to also estimate a gain disparity between the different channels.11-08-2012
20120281783METHOD OF TRANSFORMING PRE-CODED SIGNALS FOR MULTIPLE-IN-MULTIPLE-OUT WIRELESS COMMUNICATION - The present invention provides a method of transforming pre-coded signals for transmission over an air interface in a MIMO wireless communication system. Embodiments of the method may include applying, at a transmitter, a transform matrix and a pre-coding matrix to a signal prior to transmitting the signal using a plurality of antennas deployed in a first antenna configuration. The pre-coding matrix is selected from a codebook defined for a second antenna configuration deployed in a non-scattering environment. The transform matrix is defined based on the first antenna configuration and a scattering environment associated with the transmitter.11-08-2012
20130182791SPARSE CODES FOR MIMO CHANNEL AND DETECTOR ALTERNATIVES FOR SPARSE CODE - Embodiments are disclosed for improved systems and methods for encoding and decoding information transmitted using multiple-input-multiple-output (MIMO) communication devices. Structurally sparse codes are implemented based on principles of compressive sampling Improved detectors are also disclosed for implementing basis pursuit and basis pursuit with runner-up detection techniques.07-18-2013
20110286547Control of a Digital Radio Frequency Interface - A control entity (11-24-2011
20110286545METHOD FOR MANAGING A DATA TRANSMISSION FROM A SENDER DEVICE, CORRESPONDING COMPUTER-READABLE STORAGE MEDIUM AND SENDER DEVICE - A sending device receives applications data blocks to be transmitted to a receiving device according to a clock rate defined by transport periods, the applications data blocks being encoded before transmission by application of a first source encoding up to the processing of a change request. The sending device determines a drift between a number of applications data blocks received by the sending device and a number of applications data blocks transmitted after encoding by the sending device. The sending device determines, taking account of the determined drift, a transition applications data block from which a second source encoding is applied in response to the change request. The transmission of the stream is then adapted in such a way that the transmission of the encoded transition data block is aligned with a start of a transport period.11-24-2011
20110286543RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - It is possible to improve the CQI reception performance even when a delay is caused in a propagation path, a transmission timing error is caused, or a residual interference is generated between cyclic shift amounts of different ZC sequences. For the second symbol and the sixth symbol of the ACK/NACK signal which are multiplexed by RS of CQI, (+, +) or (−, −) is applied to a partial sequence of the Walsh sequence. For RS of CQI transmitted from a mobile station, + is added as an RS phase of the second symbol and − is added as an RS phase of the sixth symbol. A base station (11-24-2011
20090110108HIGH BANDWIDTH DATA TRANSPORT SYSTEM - Preparing data for transmission includes determining bit loading per frequency bin based on channel estimation data to create a data symbol, performing a Fast Fourier Transform (FFT) on the interleaved data symbol array, mapping FFT data output sub-channel to a frequency bin to provide frequency mapped data, and performing an Inverse Fast Fourier Transform (IFFT) on the frequency mapped data to provide IFFT frequency mapped data suitable for transmission using one-dimensional amplitude modulated ultra wideband impulses representing the IFFT frequency mapped data. To recover the data a reverse process is used.04-30-2009
20110305295METHOD AND APPARATUS FOR TRANSMITTING CSI-RS AND DATA USING PARTIAL MUTING OF CSI-RS - A method and apparatus for transmitting Channel State Information Reference Symbol (CSI-RS) and data with partial muting of the CSI-RS are proposed. The method includes determining a CSI-RS pattern to be used among CSI-RS pattern candidates, determining a muting pattern for muting some resource elements constituting CSI-RS pattern candidates except for the determined CSI-RS pattern, mapping data symbols and CSI-RS to resource elements in a resource grid with rate patching in consideration of the CSI-RS pattern and muting pattern, and transmitting the data symbols and CSI-RS to a terminal.12-15-2011
20110310995Transcoding multiple media elements for independent wireless delivery - Transcoding multiple media elements for independent wireless delivery. Respective media or multimedia elements are selectively and respectively encoded and/or transcoded. Such respective and selective processing of different media elements provides for their unbundled and independent communication to one or more other devices. In one instance, different respective overlays of a display (e.g., a computer, TV, PDA display, etc.) are respectively and selectively transcoded and/or encoded to generate different respective streams that may each be handled differently as a function of any number of parameters (e.g., media element type, content, communication channel characteristic, source proximity, priority, etc.). Different types of media elements include photo/image, video, graphics, text, audio, picture-in-picture, two-dimensional (2D), three-dimensional (3D), and/or other types of media elements as may be included within a given configuration of a display. Each respective encoding and/or transcoding may be particularly optimized or tailored for a given media element type.12-22-2011
20110310994DATA TRANSMISSION METHOD AND APPARATUS IN MULTIPLE ANTENNA SYSTEM - A data transmission method in a multiple antenna system is provided. The method includes: defining a codebook including at least one precoding matrix composed of a plurality of rows and columns, wherein the codebook is at least one of a first type in which all elements of the precoding matrix are non-zero elements, a second type in which any one column of the precoding matrix includes non-zero element and the remaining columns include at least one zero element, and a third type in which all columns of the precoding matrix include at least one zero element; precoding an input symbol by using the defined codebook; and transmitting the precoded symbol.12-22-2011
20110310993PREAMBLE METHODS AND TECHNIQUES - A method and system for a method of transmitting data within a signal frame. The method comprises inserting a first synchronization preamble into a first location within the signal frame and inserting a second synchronization preamble into a second location within the signal frame, wherein the first synchronization preamble conveys information indicative of the second location. The method further comprises issuing the signal frame towards a receiving device in a wireless communication environment.12-22-2011
20130188748APPARATUS FOR PROVIDING MULTIMEDIA SERVICES AND METHOD THEREOF - Provided are a transmitter and a receiver for providing a multi-layered multimedia service, and a method thereof The transmitter includes: a Multiple Description Coding (MDC) unit configured to perform MDC on at least one source, and to output a description sequence for the at least one source; a Unequal Error Protection (UEP) grouping unit configured to output a UEP description sequence having a different number of description sequences constituting the description sequence according to a UEP level to which an importance level of the at least one source has been reflected; and a transmission code block processor configured to segment the UEP description sequence, to modulate each segmented UEP description sequence, and to generate a transmission block. Therefore, it is possible to ensure graceful degradation and scalability and provide a high-quality multimedia service.07-25-2013
20120002751Transmitter, Transmission Method, Receiver, Reception Method, and Program - A transmitter, a transmission method, a receiver, a reception method, and a program are provided which can allow the acquisition of all selection information of multi-segment broadcasting.01-05-2012
20120002748DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcast receiver and a control method thereof are disclosed. The digital broadcast receiver includes a reception unit for receiving a broadcast signal which mobile service data and main service data are multiplexed, an extractor for extracting transmission parameter channel signaling information and fast information channel signaling information from a data group in the received mobile service data, an acquirer for acquiring a program table describing virtual channel information and a service of an ensemble by using the extracted fast information channel signaling information, the ensemble being a virtual channel group of the received mobile service data, a detector for detecting a descriptor defining Internet access information corresponding to the mobile service data by using the acquired program table, and a controller for controlling such that the Internet access information of the detected descriptor and the mobile service data are displayed.01-05-2012
20120002747METHOD AND DEVICE FOR REDUCING QUANTIFICATION NOISE FOR TRANSMITTING A MULTI-CARRIER SIGNAL - A method and apparatus to reduce the level of quantification noise when transmission power varies with frequency. Power variation is carried out in the analog domain by filtering a frequency band and attenuating a complementary band in two signal analog-processing paths. More precisely, the method for reducing the quantification noise for transmitting a multi-carrier signal comprises an IFFT conversion step, a digital-to-analog conversion step and an analog-processing step of the signal frequencies on a band having a maximal frequency. Moreover, the analog processing step includes at least two processing paths in parallel to the analog signal, in which: for at least one first path, the signal is filtered so as to retain only the frequencies of a low-frequency band and, in parallel in at least one second path, the signal is subjected to gain, amplification or gain attenuation and, in a final step, the signals from the paths are summed.01-05-2012
20120020431ANTENNA DEVICE AND MULTI-ANTENNA SYSTEM - An object of the present invention is to provide an antenna device that exhibits, in wireless communication of an omni-cell system for simultaneously transmitting a plurality of data corresponding to one another, excellent cost performance, and can reduce antenna loss and prevent radio wave interference. This antenna device includes a plurality of sector antennas 01-26-2012
20120020430METHOD AND CIRCUIT FOR SIGNAL TRANSMISSION VIA A CURRENT LOOP - A method for signal transmission between a first and a second system; wherein the first and the second system are connected with one another via a current loop. A direct current signal is transmitted in a first frequency range and an alternating current signal in a second frequency range via the current loop. The direct current signal and the alternating current signal are superimposed and the alternating current signal is used for digital signal transmission and the direct current signal is used for analog signal transmission. By means of a control unit, a first data stream is produced, in which the direct current signal and alternating current signal to be set in the current loop are digitally encrypted. The first data stream is transmitted to an electrical current output circuit and the transmitted first data stream is converted by the electrical current output circuit into an electrical current signal. The electrical current signal is composed of the superimposed direct current signal and alternating current signal, or the transmitted first data stream is converted by the electrical current output circuit into the direct current signal and the alternating current signal. The electrical current signal or the direct current signal and the alternating current signal are set in the current loop.01-26-2012
20120020429APPARATUS AND METHOD FOR COMPENSATING FOR CLIPPING POWER LOSSES - An apparatus and method for compensating for transmit power losses that are caused by the addition of a clipping or crest factor reduction module in the TX path of a communications system. The method includes applying a gain to a signal input into the crest factor reduction module, so that a power of a signal output from the crest factor reduction module is equal to a power of a signal output from a baseband signal generation module in the TX chain. The apparatus and method have the benefit that the peaks of the signal to be transmitted will be consistent over a wide range of TX power values.01-26-2012
20120020428ELECTRONIC DEVICE, ELECTRONIC SYSTEM, AND METHOD OF PROVIDING INFORMATION USING THE SAME - There is described an electronic system comprising a first electronic device and a second electronic device communicating with each other. The first electronic device includes a first output unit, a first communication unit, and a first controller automatically transmitting supplementary information related to multimedia contents to the second electronic device through the first communication unit while playing the multimedia contents through the first output unit. The second electronic device includes a second output unit, a second communication unit, and a second controller outputting supplementary contents, related to the multimedia contents, through the second output unit on the basis of the supplementary information received from the first electronic device01-26-2012
20130195216COMMUNICATION DEVICE - A communication device includes: a converting part converting a data signal from a non-return-to-zero signal to a return-to-zero signal; a trigger flip-flop inverting an output signal every time the return-to-zero signal changes in one cycle; a first filter outputting a positive pulse and a negative pulse alternately, which indicate existence and absence of the pulse corresponding to a value of the data signal, by removing a low frequency component of an output signal of the trigger flip-flop.08-01-2013
20130195215METHOD AND APPARATUS TO INDEPENDENTLY CONTROL FRONT END GAIN AND BASEBAND GAIN - The invention may provide a receiver including a front-end block to provide a front-end gain on a radio-frequency input signal. The front-end block may include a mixer to convert the radio-frequency input signal to a baseband signal. The receiver also may include a wide-band peak detector coupled to the front-end block and a baseband block to provide a baseband gain on the baseband signal. An analog-to-digital converter may convert the baseband signal to a digital signal. The receiver may further include narrow-band peak detector coupled to an output of the analog-to-digital converter. An automatic gain control circuit may independently control the front-end gain and the baseband gain based on outputs from the wide-band peak detector and narrowband peak detector.08-01-2013
20120033757MONITORING SYSTEM, DEVICE, MONITORING METHOD, AND MONITORING PROGRAM - In a monitoring system, a first device among devices includes a generating unit that generates third data indicating a string of an identical section when strings each indicated in first data and second data acquired through communications with the devices are identical to each other by a predetermined proportion or more, and a first transmitting unit that transmits the third data generated by the generating unit and information for identifying the third data to a second device included in the devices. The second device includes a second transmitting unit that transmits, when a string indicated in fourth data to be transmitted to the first device includes the string indicated in the third data, fifth data indicating a string obtained by excluding the string indicated in the third data from the string indicated in the fourth data, and the information for identifying the third data to the first device.02-09-2012
20120039413Multiple Gigahertz Clock-Data Alignment - A transmitting system includes a clock system and a data system. The clock system is configured to receive a clock having a first value and produce a control signal having a second, different value and an output clock having the first value. The data system is configured to receive data and the control signal and to align the data with the output clock, based on the control signal, to produce output data. The clock system includes a driver configured to produce the output clock, a divider configured to divide the received clock, and a phase interpolator configured to rotate the divided clock to produce the control signal. Also, the data is parallel data, and the data system includes a multiplexer configured to receive the parallel data and to use the control signal to serialize the parallel data as the aligned data and a driver configured to produce the output data.02-16-2012
20120045017TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM - Embodiments provide a transform-based method for representing steering matrices in transmit beamforming for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Beamforming embodiments generate a transform-based representation of steering matrices for at least a subset of sub-carriers for which channel information is known. In some embodiments, a beamformer is able to receive transform matrices information for at least a subset of channel sub-carriers, and generate corresponding channel sub-carrier steering matrices. Some embodiments of a beamformee are able to map at least a subset of channel sub-carrier steering matrices to corresponding transform matrices information prior to transmitting the transform matrix information to a beamformer. Other embodiments of a beamformer are able to receive channel information for at least a subset of sub-carriers of a channel, and compute a transform-based representation of a steering matrix for each sub-carrier for which channel information is known.02-23-2012
20120057646METHODS AND APPARATUS FOR ENCODING AND TRANSMITTING MOBILE DEVICE LOCATION INFORMATION - Methods and apparatus for communicating the location of a mobile wireless communications device are described. Codewords, e.g., values or sets of bits, are selected from a codebook mapping different codewords to corresponding pieces of location information. In a first approach location information is communicated by using codewords from different codebooks with the product, e.g., intersection of location information provided by the codewords, providing relatively detailed location information using relatively few bits. In a second approach user specific codebooks are defined for individual users. The codewords in the codebook corresponding to a particular user map to locations the individual specific user is likely to frequent. In another approach codewords are transmitted at different power levels and/or using different coding rates. Received codewords corresponding to a device may be used in combination to determine the location or refine the understanding of the device location.03-08-2012
20130101064Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same, and Aperture Relationships - Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a basehand information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.04-25-2013
20130202058Antenna Device and Method for Precoding Data in a Multiple-Input Multiple-Output System - An antenna device and method for precoding data in a MIMO system. The antenna device comprises a plurality of physical antennas in a distributed antenna system and a MIMO precoder. The MIMO precoder has a plurality of inputs for a plurality of data streams and a plurality of outputs for the plurality of data streams. A second precoder is disposed in series with the MIMO precoder. The second precoder maps a data stream to an output associated with a physical antenna port associated with at least one of the plurality of physical antennas.08-08-2013
20130202059METHOD AND DEVICE FOR GENERATING PRECODING MATRIX IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and a device for generating a precoding matrix in a wireless communication system. The method for generating the precoding matrix comprises a step of receiving from a terminal feedback including information on the error angle θ of channel direction information (CDI), which indicates the direction of a channel direction vector, and a step of generating the precoding matrix based on the information on the error angle θ of the CDI, wherein the error angle θ of the CDI indicates the angle between the channel direction vector and a quantized channel direction vector, and includes at least one of a channel quantization error component, a channel feedback delay error component, and a channel estimation error component.08-08-2013
20120063534SIGNAL TRANSMISSION SYSTEM WITH CLOCK SIGNAL GENERATOR CONFIGURED FOR GENERATING CLOCK SIGNAL HAVING STEPWISE/SMOOTH FREQUENCY TRANSITION AND RELATED SIGNAL TRANSMISSION METHOD THEREOF - A signal transmission system includes a first clock signal generator and a second clock signal generator. The first clock signal generator is configured for generating a first clock signal according to clock information derived from a transmitted signal, wherein the transmitted signal is changed in response to a frequency change of a second clock signal, and the first clock signal generator enters a frequency-unlocked state if the second clock signal has a frequency transition from a first frequency to a second frequency during a first time period. The second clock signal generator is configured for generating the second clock signal having the frequency transition from the first frequency to the second frequency during a second time period longer than the first time period such that the first clock signal generator stays in a frequency-locked state during the second time period.03-15-2012
20120069930 CIRCUIT FOR A TRANSMITTER - A transmitter (03-22-2012
20120300874SOUNDING PACKET FORMAT FOR LONG RANGE WLAN - In a method for generating a null data packet (NDP) sounding packet for transmission via a communication channel, a signal field and one or more long training fields are generated. The signal field and the long training fields are modulated using a plurality of orthogonal frequency division multiplexing (OFDM) symbols. Symbol duration of each OFDM symbol of the plurality of OFDM symbols is at least 8 μs. The NDP sounding packet is generated to include the plurality of OFDM symbols. The NDP sounding packet omits a data payload portion.11-29-2012
20120093258METHOD FOR COMPENSATING FOR FREQUENCY ATTENUATION USING ADAPTIVE CYCLIC DELAY DIVERSITY, AND TRANSMITTING APPARATUS AND METHOD AND RECEIVING APPARATUS AND METHOD USING SAME - Disclosed is a method for compensating for frequency attenuation using adaptive cyclic delay diversity, and a transmitting apparatus and method and a receiving apparatus and method using the same. In the method, a receiving side feeds back information on an antenna to be delayed and an adaptive CDD delay value for the antenna to a transmitting side, and the transmitting side performs a cyclic delay transmission based on the provided cyclic delay value, so as to improve the reception frequency response characteristics.04-19-2012
20120093257APPARATUS FOR GENERATING A SET OF RADIO PARAMETERS, A TRANSMITTER AND A RECEIVER - A transmitter includes: a data modulation and channel coding unit configured to perform data modulation and channel coding for a data channel with a modulation level and a channel coding rate updated for each transmission time interval; a multiplexing unit configured to multiplex a control channel and the data channel for each transmission time interval; and an adjusting means configured to adjust a length of the transmission time interval. Increasing a unit of information transmission in the time direction and/or the frequency direction depending on communication conditions can reduce a frequency of inserting (allocating) the control channel, and can improve data transmission efficiency.04-19-2012
20120093256Transmit Diversity Scheme - The present invention relates to methods for implementing transmit diversity in a telecommunication network. In particular there is provided an algorithm for performing transmit diversity encoding in a transmitter (04-19-2012
20120093255DATA TRANSMITTER AND METHOD FOR FORMING SYMBOL THEREOF - Provided is a data transmission device and a symbol generation method of the same. A data processing unit of a data transmission device according to an embodiment of the present invention accesses a memory device for reading another data block while symbols for one data block are generated.04-19-2012
20120093254TRANSMITTER MODULE FOR UNIDIRECTIONAL COMMUNICATIONS AND A METHOD USING THE AFOREMENTIONED - A transmitter module for unidirectional communication with a receiver module and a method using the aforementioned. The transmitter module includes a carrier detection portion, a source processing portion coupled to the carrier detection portion and a source transmission portion coupled to the source processing portion. The source processing portion can receive and process an information signal to produce a processed information signal in a manner such that an appropriate carrier signal is modulated with the information signal. The appropriate carrier signal can be based on the detection signals communicated from the carrier detection portion. The source processing portion can further process the information signal in a manner such that the processed information signal is associable with at least one of a unique code and an indication signal. The indication signal is associable with absence of communication of the at least one communication signal in a communication medium.04-19-2012
20130208823Spatio-Temporal Processing for Communication - A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element and/or single receiver antenna element. The system is not restricted to wireless contexts and may exploit any channel having multiple inputs or multiple outputs and certain other characteristics. Multi-path effects in a transmission medium cause a multiplicative increase in capacity.08-15-2013
20130208824PILOT PATTERN DESIGN FOR A STTD SCHEME IN AN OFDM SYSTEM - A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension.08-15-2013
20130208825METHOD AND DEVICE FOR PRECODING IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and a device for precoding in a wireless communication system. The method for precoding comprises the following steps: generating a first precoding matrix, W08-15-2013
20130208822Low Bandwidth PHY Transmission in a Wider Bandwidth - A method for generating signals to be transmitted within a BSS channel, where a set of component channels is collectively coextensive with the BSS channel, includes determining that a first duplicate, in frequency, of a low bandwidth mode data unit will be located at an edge of the BSS channel. Each duplicate includes OFDM tones and has a bandwidth less than the narrowest channel of the component channels. The OFDM tones in each duplicate include one or more data tones, one or more pilot tones, and one or more guard tones. The method also includes generating a transmission signal comprising the duplicates, at least in part by scaling down at least one data tone, and/or zeroing out at least one data tone, of the first duplicate in response to determining that the first duplicate will be located at an edge of the BSS channel.08-15-2013