Entries |
Document | Title | Date |
20080207142 | Amplitude Modulation Apparatus, Amplitude Limiting Method, and Computer-Readable Program - The present invention relates to an amplitude modulation apparatus, an amplitude limiting method, and a transmission apparatus for performing amplitude limitation on an orthogonally modulated signal. The amplitude modulation apparatus, the amplitude limiting method, and the transmission apparatus enable peak value suppression of a transmission wave with a simple structure. An amplitude limiting apparatus that performs amplitude limitation on an orthogonally modulated signal includes first amplitude limiting means ( | 08-28-2008 |
20080214127 | Method, system and apparatus for estimation of propagation path variability of a transmit diversity channel - A method and apparatus for dynamic adaptation of transmit diversity parameters according to detected dynamics that may be, for example, related to changes in actual propagation and network conditions, and may be referred to as mobility parameters. Mobility parameters may apply to variability in a propagation path due to any conditions. Determination of a mobility parameter may be conducted using one or more of multiple parameters available to the mobile terminal. | 09-04-2008 |
20080214128 | Diversity Transmission Method and Transmitter of a Base Station Using the Same in a Mobile Commmunication System - A diversity transmission method and a transmitter of a base station using the same is provided in a mobile communication system. For this purpose, the diversity transmission method for controlling power of transmit antennas when the transmitter transmits a signal to a mobile terminal using a plurality of antennas includes (a) receiving feedback information concerning the antenna having the best channel status from the mobile terminal, (b) increasing power allocation of a selected antenna according to the feedback information by a predetermined amount and decreasing power allocation of a non-selected antenna by a predetermined amount, and (c) transmitting the signal to the mobile terminal using the power allocation controlled in (b). | 09-04-2008 |
20080220730 | MULTI-CHANNEL TRANSMITTER - A radio transmission method and a radio transmitter device for radio transmission of an audio signal from an audio device to a radio receiver wherein an audio signal is received from the audio device, and an RF signal is transmitted simultaneously which is modulated with the audio signal on each of a set of at least two different RF channels. Within each of the transmitted RF signals, information identifying at least the other RF channels in the set of RF channels is included. | 09-11-2008 |
20080227413 | IMBALANCED TRANSMISSION COMBINING AT RADIO BASE STATION - A radio base station ( | 09-18-2008 |
20080227414 | SYSTEM, METHOD AND APPARATUS FOR TRANSMIT DIVERSITY CONTROL BASED ON VARIATIONS IN PROPAGATION PATH - A method and apparatus for applications of identification of variations of propagation path to transmit diversity control. Transmit diversity parameters may be modified according to detected dynamics, which may, for example, be related to changes in actual propagation and network conditions. Such dynamics may be referred to as mobility parameters. Mobility parameters may apply to variability in a propagation path due to any conditions. Determination of a mobility parameter may be conducted using one or more of multiple parameters available to the mobile terminal. Such feedback information indication, which is related to the propagation path conditions, may be provided to the apparatus, which would attempt to find a more desired mode of operation, which may lead to reduction in power and the improvement of the quality of transmission. | 09-18-2008 |
20080227415 | METHOD, APPARATUS AND SYSTEM FOR PHASE DIFFERENCE ADJUSTMENT IN TRANSMIT DIVERSITY - A method and apparatus for using an antenna selection signal for selecting a transmit diversity parameter, including phase difference and/or power ratio between concurrently transmitting antennas. | 09-18-2008 |
20080227416 | ARRANGEMENT FOR CONTROLLING INDIVIDUAL ANTENNAS OF AN ANTENNA ARRANGEMENT - An arrangement for controlling individual antennas of an antenna arrangement in a magnetic resonance apparatus has a device for signal division. This device is designed such that each transmission signal present at an input of the device for signal division is divided among all outputs of the device for signal division. Each output of the device for signal division is connected with a respective individual antenna. A number of transmission branches are provided for the inputs of the device for signal division. Each transmission branch has components that form a transmission signal that is modulated specific to the transmission branch and is amplified. Each transmission branch is connected with a respective associated input of the device for signal division, such that the transmission signal therefrom arrives at the associated input. | 09-18-2008 |
20080227417 | METHOD, APPARATUS AND SYSTEM FOR CONTROLLING A TRANSMIT DIVERSITY DEVICE - A method of operating a transmit diversity device, wherein upon detection of a phase instability condition a power setting, such as a ratio of transmission power between different antennas, may be modified. | 09-18-2008 |
20080242243 | Transmission Directional Antenna Control System, Base Station, And Transmission Directional Antenna Control Method Used For System And Base Station - To provide a base station capable of selecting an optimum beam from among transmitted ones of multi-beams. In the arrangement, a beam power determining part ( | 10-02-2008 |
20080248765 | Superheterodyne Receiver with Switchable Local Oscillator Frequency and Reconfigurable IF Filter Characteristics - An integrated circuit RF receiver processes multiple RF frequencies without internally changing the local oscillator to receive the multiple signals. No front-end tuner is used. In one embodiment, multiple crystals are connected to pins of the IC. A switch within the IC, controlled by a switch signal, selects one of the crystals as a reference frequency, depending on the frequency of the RF signal desired to be received. The selected reference frequency is applied to an RF synthesizer (a local oscillator) to set the output frequency of the RF synthesizer. The local oscillator signal is then mixed with the incoming RF signal to generate sum and difference signals that need to be filtered by an IF filter. The switch signal also reconfigures the IF filter to change its center frequency and filter bandwidth, based on the requirements of the RF signal data format. | 10-09-2008 |
20080287075 | TRANSPOSED STRUCTURE FOR CYCLIC DELAY DIVERSITY (CDD) BASED PRECODING - Systems and methodologies are described that facilitate applying cyclic delay diversity (CDD) and precoding to wireless transmissions. In particular, data vectors to be transmitted to a number of receive antennas of a receiver can be transformed to a virtual antenna domain. CDD can be applied to this domain followed by precoding to allow the benefits of precoding to remain though CDD is applied. In this regard, the resulting signals can be transmitted without pouring transmission energy into null spaces unreachable by receiving devices. | 11-20-2008 |
20080311863 | Radio 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 ( | 12-18-2008 |
20090011722 | METHODS AND APPARATUS FOR WIRELESSLY COMMUNICATING SIGNALS THAT INCLUDE EMBEDDED SYNCHRONIZATION/PILOT SEQUENCES - An embodiment for wirelessly communicating a signal includes a transmitter combining a plurality of phase shifted input data signals with a plurality of synchronization/pilot sequences to produce a plurality of combined signals, performing frequency domain-to-time domain transformations of the combined signals to produce a plurality of candidate signals, determining peak-to-average ratios for at least some of the plurality of candidate signals, identifying a selected signal from the plurality of candidate signals based on the peak-to-average ratios, and transmitting the selected signal over a wireless communication channel. An embodiment further includes a receiver receiving a channel-affected version of the transmitted, selected signal, determining an estimate of a selective mapping index, which identifies the synchronization/pilot sequence from the plurality of synchronization/pilot sequences, applying corrections to the received signal based on estimated channel perturbations to produce an equalized combined signal, and producing an output data symbol from the equalized combined signal. | 01-08-2009 |
20090023401 | METHOD AND APPARATUS FOR REDUCING TRANSIENT IMPACTS OF BEAM SWITCHING IN A SWITCHED BEAM ANTENNA SYSTEM - A method and apparatus for reducing transient impacts of beam switching in a switched beam antenna system are disclosed. A switch beam antenna system generates a plurality of beams in a predefined beam pattern and switches the current beam position to one of the plurality of predefined beams in accordance with measurement results for each of the beams. Quality of signals is periodically measured for each of the plurality of predefined beams, and the best beam is determined. The current beam is switched to either the best beam or an intermediate beam in accordance with the separation between the best beam and the current beam. | 01-22-2009 |
20090042519 | TRANSMISSION DEVICE AND TRANSMISSION METHOD - There is provided a transmission device capable of preventing increase of retransmission information or encoding redundant bit and improving a throughput in a MIMO communication method. In this device, an encoding unit ( | 02-12-2009 |
20090054013 | Transmitter and Transmitting Method Thereof In Wireless Communication System - A transmitter and a transmitting method of a wireless communication system are provided. The transmitter transmits RF signals using an outphasing scheme of converting one analog IF NC-EMS into two analog C-EMSs. In the transmitter, a baseband processor generates a baseband digital modulated I-signal and a baseband digital modulated Q-signal. A signal converter converts the baseband digital modulated I-signal and the baseband digital modulated Q-signal into a baseband analog modulated I-signal and a baseband analog modulated Q-signal. An IF processor up-converts the baseband analog modulated I-signal and the baseband analog modulated Q-signal to generate one analog IF NC-EMS. A signal component separator separates the analog IF NC-EMS into a first analog IF C-EMS and a second analog IF C-EMS. An RF processor up-converts the first analog IF C-EMS and the second analog IF C-EMS to generate a first analog RF C-EMS and a second analog RF C-EMS. A power amplifier amplifies powers of the first and second analog RF C-EMSs. An RF combiner combines the first and second analog RF C-EMSs having the amplified powers to generate one combined analog RF C-EMS. | 02-26-2009 |
20090054014 | Transmitter and Transmitting Method Thereof In Wireless Communication System - A transmitter and a transmitting method of a wireless communication system are provided. The transmitter transmits RF signals using an outphasing scheme of converting one analog IF NC-EMS into two analog C-EMSs. In the transmitter, a baseband processor generates a baseband digital modulated I-signal and a baseband digital modulated Q-signal. An IF processor up-converts the baseband digital modulated I-signal and the baseband digital modulated Q-signal to generate one digital IF NC-EMS. A signal component separator separates the digital IF NC-EMS into a first digital IF C-EMS and a second digital IF C-EMS. An RF processor up-converts the first digital IF C-EMS and the second digital IF C-EMS to generate a first analog RF C-EMS and a second analog RF C-EMS. A power amplifier amplifies powers of the first and second analog RF C-EMSs. An RF combiner combines the first and second analog RF C-EMSs having the amplified powers to generate one combined analog RF C-EMS. | 02-26-2009 |
20090054015 | MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEM, TRANSMITTER, AND METHOD OF ASSIGNING RESOURCES THEREIN - Transmitter ( | 02-26-2009 |
20090075606 | VERTICAL MULTIPLE-INPUT MULTIPLE-OUTPUT WIRELESS ANTENNAS - High gain, multi-pattern multiple-input multiple-output (MIMO) antenna systems are disclosed. These systems provide for multiple-polarization and omnidirectional coverage using multiple radios, which may be tuned to the same frequency. The MIMO antenna systems may include multiple high-gain beams arranged (or capable of being arranged) to provide for omnidirectional coverage. These systems provide for increased data throughput and reduced interference without sacrificing the benefits related to size and manageability of an associated access point. | 03-19-2009 |
20090081967 | WIRELESS TRANSMITTER - A wireless transmitter includes: a plurality of transmission antennas; a phase rotating unit which adds phase rotation to signals which are respectively input to the plurality of transmission antennas, and a reception unit which receives information on phase control of arbitrary antennas among the plurality of transmission antennas from another party of communication, wherein the phase rotating units adds first phase rotation for controlling the maximum delay time between the plurality of transmission antennas and second phase rotation for controlling the phases of the arbitrary antennas among the plurality of transmission antennas based on the information. | 03-26-2009 |
20090088089 | CONTROL CHANNEL NEGOTIATED INTERMITTENT WIRELESS COMMUNICATION - A dual mode communication device utilizes a control channel to exploit diversity, history, and context in advance of establishing a broadband data exchange session on a broadband but shorter range wireless data channel, maximizing productive use of such a session. Appropriate diversity for the negotiated session further enhance data transfer, including path diversity, radio technology diversity (e.g., WiMax, Wi-Fi, ultra wideband, Bluetooth), antenna diversity (e.g., MIMO), modulation diversity (e.g., rate selection for 802.11, or symbol length selection to combat multi-path fading), and frequency diversity (e.g., 2.4 GHz versus 5 GHz). Historical information about channel characteristics optimize the selection of channel parameters with respect to the diversity choices. In addition, context information such as location and speed can be used to categorize the historical information that is collected to further optimize channel parameters. | 04-02-2009 |
20090088090 | OMNI-DIRECTIONAL AND LOW-CORRELATED PRE-CODING BROADCAST BEAMFORMING - Techniques are provided herein to compute beamforming weight vectors for pre-coding broadcast signals. First, system parameters for a device configured to wirelessly transmit one or more broadcast signals via a plurality of antennas are determined. Based on the system parameters a plurality of beamforming weight vectors are computed. The beamforming weight vectors are computed such that they have omni-directional like characteristics and such that correlation between beamforming weight vectors is relatively low. The plurality of beamforming weight vectors are applied to each of the one or more broadcast signals for transmission by the device to produce beamformed transmit signals for transmission via the plurality of antennas. | 04-02-2009 |
20090093221 | METHOD AND APPARATUS FOR SIGNALING INTERFERENCE INFORMATION FOR MULTI-USER MIMO - A method and apparatus for signaling interference information in a multi-user multiple-input multiple-output (MU-MIMO) system including a plurality of wireless transmit/receive units (WTRUs) and a base station are disclosed. The method includes the base station signaling interference information including rank information or a number of WTRUs to a particular WTRU based on beamforming vector feedback information received from the WTRUs. In order to reduce the downlink signaling overhead, confirmation of the beamforming vector feedback from WTRUs is used. The interference beamforming vectors and rank information or the number of WTRUs can be signaled separately or jointly. | 04-09-2009 |
20090098838 | BEAMFORMED MULTI-INPUT MULTIPLE-OUTPUT COMMUNICATION WITH UPLINK TRANSMISSION ROTATION - Techniques are provided to enable computation of beamforming weights for beamforming MIMO wireless communication between first and second wireless communication devices. At the first device comprising a first plurality of antennas, signals are received that are wirelessly transmitted from a different one of a second plurality of antennas of the second device during a corresponding one of a plurality of time slots. The first device computes beamforming weights from the received signals. When signals are to be transmitted from the first device to the second device, the first device applies the beamforming weights to signals to be transmitted from the first plurality of antennas of the first device to the second plurality of antennas of the second device. | 04-16-2009 |
20090117862 | METHOD FOR THE MULTI-ANTENNA TRANSMISSION OF A LINEARLY-PRECODED SIGNAL, CORRESPONDING DEVICES, SIGNAL AND RECEPTION METHOD - An embodiment of invention relates to a method for the transmission of a signal formed by vectors, each vector comprising N source symbols to be transmitted, using M transmission antennas, wherein M is greater than or equal to 2. The method comprises the following steps: linearly precoding the signal using a matrix product of a source matrix formed by vectors that are organized in successive lines by a linear precoding matrix, delivering a precoded matrix; and successively transmitting precoded vectors corresponding to columns of said precoded matrix, the M symbols of each precoded vector being distributed to the M antennas. | 05-07-2009 |
20090149139 | SYSTEM, APPARATUS AND METHOD FOR INTRODUCING ANTENNA PATTERN VARIABILITY - A device, system, and method for providing a transmit diversity device have a first antenna and a second antenna. The first antenna may have a first power transmission gain pattern, which may be non-uniform in a reference plane. The second antenna may have a second power transmission gain pattern, which may be non-uniform in a reference plane. The first and second antennae may be arranged with respect to each other such that a minimum power region of the first gain pattern overlaps a maximum power region of the second gain pattern in the reference plane. The transmit diversity device may also have a processor to receive a feedback parameter from a feedback device. The processor may produce a different transmit diversity parameter based on the feedback parameter for each of a first and second signals to be transmitted on the first and second antennae, respectively. | 06-11-2009 |
20090163153 | Wireless Communication System, Wireless Communication Apparatus, Amplification Factor Determination Method, and Storage Medium - The back-off of an AGC diversion section can be appropriately controlled. A base station apparatus ( | 06-25-2009 |
20090176462 | WIDE DYNAMIC RANGE OUT-PHASING ARRAY TRANSMITTER - A novel out-phasing-array transmitter system and method are disclosed. The method is based on decomposing the input signal into an array of signals to drive a general, multiple paths out-phasing-array transmitter. This decomposition is less sensitive to the phase difference between the multiple paths, and extends the dynamic range of the out-phasing-array transmitter system. The wide dynamic range and the multiple transmission paths increase the maximum achievable output power, in accordance with the WiMAX specifications. | 07-09-2009 |
20090176463 | METHOD AND APPARATUS FOR CONVEYING ANTENNA CONFIGURATION INFORMATION - A method, apparatus and computer program product are provided for conveying information regarding the antenna configuration and/or the transmission diversity scheme to a recipient, such as a mobile device. In particular, information regarding the antenna configuration and/or the transmission diversity scheme can be conveyed by appropriately mapping a physical broadcast channel within a sub-frame so as to include reference signals indicative of different antenna configurations or transmission diversity schemes. Alternatively, masking, such as cyclic redundancy check masking, can be used to provide information regarding the antenna configuration and/or the transmission diversity scheme. | 07-09-2009 |
20090186585 | Multi-mode wireless communication link - A communication system includes first and second transmitters, which are coupled to transmit respective first and second Radio Frequency (RF) signals carrying first and second data over a wireless communication channel. The transmitters are coupled to select an operational mode from a group of operational modes and to operate in the selected operational mode. The group of the operational modes includes at least two of a protection mode, wherein the second transmitter serves as backup to the first transmitter, a spatial multiplexing mode, in which the first data is different from the second data and the first and second transmitters transmit simultaneously, and a beam-forming mode, in which the first data is identical to the second data, the second RF signal includes a phase-shifted replica of the first RF signal, and the first and second transmitters transmit simultaneously. | 07-23-2009 |
20090197546 | MIMO TRANSMISSION WITH EXPLICIT AND IMPLICIT CYCLIC DELAYS - Techniques for transmitting data using a combination of explicit cyclic delay and implicit cyclic delay are described. A transmitter may perform first processing for cyclic delay diversity (or explicit cyclic delay processing) based on a first set of cyclic delay values known to a receiver. The transmitter may perform precoding based on a precoding matrix either before or after the explicit cyclic delay processing. The transmitter may perform second processing for cyclic delay diversity (or implicit cyclic delay processing) based on a second set of cyclic delay values unknown to the receiver. The transmitter may perform both explicit and implicit cyclic delay processing for data and may perform only implicit cyclic delay processing for pilot. One entity may select the first set of cyclic delay values and inform the other entity. The transmitter may autonomously select the second set of cyclic delay values without informing the receiver. | 08-06-2009 |
20090239486 | APPARATUS FOR ANTENNA DIVERSITY USING JOINT MAXIMAL RATIO COMBINING - A method for improving performance of radio frequency (RF) communication of a station (STA) having an access point (AP) is disclosed. The method includes using an arbitrary set of transmit antenna weights, calculating a set of receive antenna weights, and updating the transmit antenna weights based on the receive antenna weights. | 09-24-2009 |
20090258609 | RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD - Data streams stored in buffers are modulated by modulation sections. Multipliers multiply the signals output from the modulation sections by weights output from a weight control section, The signals output from the multipliers are added up by addition sections, subjected to radio transmission processing by transmission radio sections and sent through antennas. A buffer control section controls the buffers based on a retransmission count output from a retransmission count detection section. The weight control section outputs weights different from weights at the time of previous transmission to the multipliers every time data is retransmitted. This allows a diversity gain at the time of data retransmission to be increased even if a time variation of the propagation path environment for radio signals is slow. | 10-15-2009 |
20090270051 | BEAMFORMER AND BEAMFORMING METHOD - Disclosed are a beamformer and a beamforming method. The beamformer includes a plurality of dividers, each of which divides an input signal along a plurality of paths, an input switch which selects one of the dividers such that the input signal is input to the selected divider, a phase shifter which shifts phases of respective output signals from the divider, and an output switch which transmits the output signals from the phase shifter to an antenna. | 10-29-2009 |
20090270052 | APPARATUS AND METHOD FOR RADIO TRANSMISSION - A radio transmission apparatus performs communications with high transmission efficiency. In this apparatus, a modulator modulates data and outputs to a first spreader. A second modulator modulates data under a modulation scheme having a higher M-ary number than the first modulator and outputs the modulated data to a second spreader. The first spreader spreads the data and outputs the spread data to a frequency domain mapping section. The second spreader spreads the data and outputs the spread data to a time domain mapping section. A frequency domain mapping section maps chips with spread data on subcarriers in the frequency domain and outputs the data with chips mapped on subcarriers to an IFFT section. The time domain mapping section maps chips with spread data on subcarriers in the time domain and outputs the data with chips mapped on subcarriers to the IFFT section. | 10-29-2009 |
20090275296 | Communication module with dual systems and method for defining operating mode thereof - A communication module with dual systems for processing a first RF signal and a second RF signal that belong to different communication systems is provided. The communication module includes a first connection port and a signal distribution circuit. The first connection port is coupled to an external circuit, and the signal distribution circuit is coupled to the first connection port and between a first system path and a second system path inside the communication module. Regardless whether the external circuit is composed by an dual-band antenna or two uni-band antenna, the signal distribution circuit controls the first RF signal transmitting along the path between the first connection port and the first system path and controls the second RF signal transmitting along the path between the path between the first connection port and the second system path. | 11-05-2009 |
20090280755 | RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS - One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes a coupler having a plurality of ports and an adjustable termination coupled to one of the plurality of ports. The adjustable termination is adjustable based on an operating condition of the RF communication device. Other methods and systems are also disclosed. | 11-12-2009 |
20090291647 | RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS - One embodiment relates to a circuit for efficient wireless communication. The circuit includes a communication port adapted to be coupled to an antenna feed. Multiple communication paths stem from the communication port, where different communication paths are associated with different frequency bands. Multiple phase shift selection circuits are respectively associated with the multiple communication paths. The phase shift selection circuits have different respective impedances relative to the communication port and the respective impedances vary for the different frequency bands. Other methods and systems are also disclosed. | 11-26-2009 |
20090325514 | WIRELESS COMMUNICATION SYSTEM AND TRANSMISSION DEVICE - The present invention relates to a wireless communication system to properly switch over a transmission method of radio signals corresponding to a configuration of a receiver. The wireless communication system according to the present invention includes a transmitting device having a plurality of antennas and capable of transmitting radio signals different from each other from these antennas, and a receiving device having at least one antenna and receiving the radio signals transmitted from the transmitting device. The receiving device comprises an information transmitting unit transmitting, to the transmitting device, configuration information about a configuration of the receiving device, and the transmitting device includes a transmitting unit transmitting the radio signals by a transmission method corresponding to the configuration information received from the receiving device. | 12-31-2009 |
20100003931 | TRANSMISSION SCHEMES FOR MULTI-ANTENNA COMMUNICATION SYSTEMS UTILIZING MULTI-CARRIER MODULATION - Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference. | 01-07-2010 |
20100029222 | DELAY DIVERSITY IN ANTENNA ARRAYS - In a wireless transmission system including a transmit delay module, delaying each of at least one copy of a signal by a respective delay, the signal being transmitted over a plurality of carrier frequencies and over at least one beam, the at least one beam exhibiting a beam pattern, the number of copies of the signal corresponding to the number of beams, each the at least one copy being associated with a respective one of the at least one beam, the system further including a beam pattern former, coupled with the transmit delay module, producing a plurality of transmit signals corresponding to the beam pattern, a frequency dependent beam shifter, coupled with the beam pattern former, delaying each of the at least one transmit signal by a respective angular shift delay, thereby applying an angular shift to each of the at least one beam, the angular shift of each of the at least one beam corresponding to at least a respective one of the carrier frequencies, wherein each beam is transmitted with a delay corresponding to the transmit delay of each the copy. | 02-04-2010 |
20100029223 | METHODS AND APPARATUS FOR IMPLEMENTING PHASE ROTATION AT BASEBAND FREQUENCY FOR TRANSMIT DIVERSITY - An apparatus for implementing phase rotation at baseband frequency for transmit diversity may include a primary transmit signal path and a diversity transmit signal path. Both the primary transmit signal path and the diversity transmit signal path may receive a primary transmit signal. A signal selector within the diversity transmit signal path may perform phase rotation with respect to the primary transmit signal while the primary transmit signal is at a baseband frequency, thereby producing a diversity transmit signal. | 02-04-2010 |
20100035565 | EFFICIENT CQI SIGNALING MIMO SYSTEMS WITH VARIABLE NUMBERS OF BEAMS - The present invention relates to a multi-beam transmission apparatus and system, and to a method for operating a multi-beam transmission system, wherein a first transmission resource information and a second transmission resource information are determined for respective first and second transmission beam, and wherein a first transmission parameter information and a second transmission parameter information are determined for the respective first and second transmission beams. The first and second transmission resource information and the first and second transmission parameter information are jointly encoded into a joint signal; and the joint signal is transmitted via the first and second transmission beams from a first station to a second station. | 02-11-2010 |
20100035566 | Transmission Device, And Array Antenna Control Method And Device - For transmitting a common channel signal with characteristics with an approximated non-directivity, the common channel signal for all users is divided into sub-channel signals, corresponding to a number of antenna elements composing an array antenna, to be concurrently transmitted with non-directivity by using each antenna element. Individual channel signals, for each user, following the common channel signal with a desired directivity by using the antenna elements. Each sub-channel signal can be made a sub-channel signal obtained by dividing all sub-channel components composing the common channel signal for each sub-channel component by a predetermined number or dividing them depending on a receiving quality of each antenna element. | 02-11-2010 |
20100041350 | Uplink transmissions with two antenna ports - A system and method for uplink transmit diversity. The system and method include a transmitter configured to pair symbols and transmit at least one the paired symbols and an orphan symbol using a Frequency Shift Transmit Diversity scheme. The system and method include a precoding and resource allocation means configured to map and precode the orphan symbols for transmission on a number of antenna ports. The orphan symbol is mapped to at least two antenna ports using one of even-odd split, top-down split and full mapping. A subscriber station is capable of receiving a cyclic shift assignment explicitly or implicitly. | 02-18-2010 |
20100041351 | Techniques to enhance diversity for a wireless system - A system, apparatus, method and article to manage diversity for a wireless multicarrier communication system are described. An apparatus may include a diversity agent to couple to a transmitter, the diversity agent to convert a determined number of input bits into symbols, interleave the symbols across multiple spatial streams, and map the symbols to tones for each spatial stream. Other embodiments are described and claimed. | 02-18-2010 |
20100048148 | METHOD, APPARATUS AND COMMUNICATION UNIT - A method, an apparatus and a communication unit for generating preceding feedback information in a multiple frequency radio transmission system are disclosed. A rank for preceding matrices, wherein the rank is constant over the multiple frequencies, is selected and a plurality of preceding matrices having the selected rank are selected. A different preceding matrix is selected for each frequency subset of the multiple frequencies. | 02-25-2010 |
20100069022 | Adaptively Selecting Signal Constellations for Multi-Carrier Edge - The wireless communication device and corresponding method described herein selectively switches between a single-frequency mode, such as appropriate for an EDGE network, and a multiple-frequency mode, such as appropriate for a multi-carrier EDGE network. Accordingly, a transmitting wireless communication device selectively switches between a single-channel mapping unit, used during the single-frequency mode, and a multi-channel mapping unit, used during the multiple-frequency mode. The multi-channel mapping unit modulates input data to output a modulated data stream for each of multiple adjacent frequency channels that, when combined, produce a multiple-frequency signal with reduced peak-to-average ratio. A receiving wireless communication device selectively switches between a single-channel demodulator, used during the single-frequency mode, and a multi-channel demodulator, used during the multiple-frequency mode. | 03-18-2010 |
20100093289 | PHASE CALIBRATION FOR MULTIPLE TRANSMITTER SYSTEMS - A method, wireless communication device, and a base station calibrate relative phase of a plurality of output signals from respectively combined plurality of transmitters ( | 04-15-2010 |
20100124888 | WIRELESS TRANSMITTER - A wireless transmitter includes: a plurality of transmission antennas; a phase rotating unit which adds phase rotation to signals which are respectively input to the plurality of transmission antennas; and a reception unit which receives information on phase control of arbitrary antennas among the plurality of transmission antennas from another party of communication, wherein the phrase rotating unit adds first phase rotation for controlling the maximum delay time between the plurality of transmission antennas depending on whether transmission is performed using frequency diversity or transmission is performed using multi-user diversity and second phase rotation for controlling the phases of the arbitrary antennas among the plurality of transmission antennas based on the information. | 05-20-2010 |
20100159854 | METHOD AND APPARATUS FOR ADAPTIVELY CONTROLLING RECEIVED POWER OF MULTI-ANTENNA RADIO CHANNEL MEASUREMENT EQUIPMENT - Provided is an apparatus for adaptively controlling a received power of a multi-antenna radio channel measurement equipment, the apparatus including: a plurality of antennas to receive a measurement signal; a switch unit comprising a plurality of switches to input the measurement signal; a switch control unit to control the plurality of switches of the switch unit to sequentially input the measurement signal; a reception (Rx) attenuator to adjust a Received Signal Strength Indication (RSSI) of the measurement signal; an Rx AGC control unit to control the Rx attenuator to adaptively adjust the RSSI of the measurement signal; a timing control unit to generate a reference timing signal for the switch control unit and the automatic RSSI control unit; and a digital baseband control unit to collect and store information associated with the measurement signal. | 06-24-2010 |
20100167668 | METHOD AND DEVICE FOR MONITORING A RADIO-FREQUENCY TRANSMITTER DEVICE IN A MAGNETIC RESONANCE TOMOGRAPHY SYSTEM - In a method and device for monitoring a radio-frequency transmit device of a magnetic resonance tomography system, having a transmitter antenna system that has a number of transmit channels, during a magnetic resonance measurement of an examination subject, a reference scattering parameter matrix of the transmitter antenna system is determined in the unloaded state, and a subject-specific scattering parameter matrix of the transmitter antenna system is determined in a state loaded with the subject of examination. Moreover, transmitter amplitude vectors are determined in time-dependent fashion that represent the radio-frequency voltage amplitudes on the individual transmit channels. On the basis of the subject-specific scattering parameter matrix, the reference scattering parameter matrix, and the transmit amplitude vectors, radio-frequency power values absorbed at particular transmit times in the subject are determined. Based on a large number of the determined radio-frequency power values, a number of monitoring values are formed. The radio-frequency transmit device is limited in its functioning when a monitoring value reaches or exceeds a prespecified boundary monitoring value. | 07-01-2010 |
20100173595 | RADIO FREQUENCY SIGNAL TRANSMISSION SYSTEM, RADIO FREQUENCY SIGNAL TRANSMISSION CONNECTOR AND RADIO FREQUENCY SIGNAL TRANSMISSION CABLE - A radio frequency signal transmission system is provided which includes a radio frequency signal transmission connector including an antenna for radiating a radio frequency signal having a predetermined frequency band, and a first dielectric body made of a material having a predetermined first permittivity and having the antenna cast therein, and a radio frequency signal transmission cable including a dielectric transmission path formed of a second dielectric body made of a material having substantially the same second permittivity as the first permittivity of the first dielectric body of the radio frequency signal transmission connector. The radio frequency signal transmission connector is connected with the radio frequency signal transmission cable thereby to form a radio frequency signal transmission path through which the radio frequency signal radiated from the antenna is transmitted to the dielectric transmission path via the first dielectric body. | 07-08-2010 |
20100178883 | System and Method for Power Control in MIMO Systems - The return channel in a multiple-input and multiple-output (MIMO) communication system is used to provide signal information on an individual-channel basis. In one embodiment, in a controlled factory environment, this information may be used to incrementing up or down the variable gain amplifier and/or the power amplifier of a MIMO transmitter and/or receiver so as to generate a default signal power offset to be used during normal operation. Thereafter, such signal information may similarly be provided via the return channel and used to further adjust the transmit parameters to account for location-specific signal conditions. | 07-15-2010 |
20100178884 | ADAPTIVE BEAM-STEERING METHODS TO MAXIMIZE WIRELESS LINK BUDGET AND REDUCE DELAY-SPREAD USING MULTIPLE TRANSMIT AND RECEIVE ANTENNAS - A method and apparatus for adaptive beam-steering are disclosed. In one embodiment, the method comprises performing adaptive beam steering using multiple transmit and receive antennas, including iteratively performing a pair of training sequences, wherein the pair of training sequences includes estimating a transmitter antenna-array weight vector and a receiver antenna-array weight vector. | 07-15-2010 |
20100197248 | ELECTRONIC DEVICE AND METHOD OF ENSURING GUARANTEED SERVICES - A method for ensuring guaranteed services for real-time traffic on an interconnect with errors is provided. The real-time traffic comprises a first and second traffic class (HRT, SRT). Real-time traffic of the first and/or second traffic class (HRT, SRT) is transmitted from a transmitter to a receiver. It is detected by the receiver whether an error has occurred during the transmission of the real-time traffic and the error is reported to the transmitter. At least part of the real-time traffic of the second traffic class (SRT) is re-transmitted by the transmitter if the transmitter has received an error report from the receiver within a predetermined time period. | 08-05-2010 |
20100210226 | COMMUNICATION TERMINAL AND DATA RECEPTION METHOD - It is possible to provide a communication terminal and a data reception method which can continue data reception while performing mutual communication such as an audio communication. A mobile telephone ( | 08-19-2010 |
20100210227 | APPARATUS AND METHOD FOR SUPPORTING MULTIPLE-INPUT MULTIPLE-OUTPUT AND BEAMFORMING SIMULTANEOUSLY IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for simultaneously supporting Multiple-Input Multiple-Output (MIMO) and beamforming in a wireless communication system are provided. In the method, two data streams are mapped to each of all of 2N transmission antennas; the two data streams are multiplied by different Cyclic Delay Diversity (CDD) phase sequences; the two data streams multiplied by the different CDD phase sequences for each transmission antenna are added; and the added data stream is multiplied by a beamforming coefficient and transmitted for each transmission antenna. | 08-19-2010 |
20100227573 | METHOD AND SYSTEM FOR RADIATING A RADIOELECTRIC SIGNAL THROUGH A COMBINATION OF SECTOR ANTENNAS - A method of radiating a radioelectric signal in an area of interest composed of at least two different area sectors, the method including providing at least two sector antennas arranged to cover the at least two different area sectors; feeding the at least two sector antennas with respective feed signals obtained from said signal; spacing apart the at least two sector antennas from each other of a distance equal to or greater than one wavelength of a radioelectric signal to be irradiated; and acting on the feed signals fed to the at least two sector antennas in such a way that a relative phase of signals transmitted by the at least two sector antennas is caused to vary in time. | 09-09-2010 |
20100248656 | WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION APPARATUS - A wireless communication method MIMO communication using a wireless communication apparatus having N antennas includes performing first inverse-matrix determining processing which determines, using a channel matrix for a first antenna selected from the N antennas, a first inverse matrix of the channel matrix; performing second inverse-matrix determining processing which determines, with respect to a (n+1)th antenna selected from antennas other than the first to nth antennas already selected, a second inverse matrix of a channel matrix for a group of the first to (n+1)th antennas, by performing computation using a value from one of the first inverse matrix and the second inverse matrix, and performing communication using, from a plurality of combinations of the L antennas selected from the N antennas, a combination of L antennas with which an inverse matrix value determined in the first and second inverse-matrix determining processing satisfies an antenna selection criterion. | 09-30-2010 |
20100261441 | WIRELESS 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 |
20100273438 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD IN MULTI-CARRIER COMMUNICATION - Provided is a radio communication device capable of preventing lowering of the frequency diversity effect when using the CDD (Cyclic Delay Diversity) in combination with the frequency diversity technique in a multi-carrier communication. In the radio communication device ( | 10-28-2010 |
20100285759 | MOBILE DEVICE HAVING AT LEAST TWO ANTENNAS AND OPERATION CONTROL METHOD THEREOF - A mobile device having at least two antennas can circumvent transmission problems caused by a user's grasp of the device. A sensor unit is disposed at a specific location of a device body and creates a sensor signal by detecting the contact or proximity of a particular object such a user's hand. When receiving the sensor signal, a control unit selects one of the antennas depending on the sensor signal and establishes a communication path based on the selected antenna. The selected antenna involved in the communication path is typically relatively free from degradation in transmission caused by a user's grasp of the mobile device. The radiation property of the mobile device, which may be degraded due to a user's grasp, can exhibit relatively little or no degradation as compared to the typical degradation in performance when the mobile device is being grasped. | 11-11-2010 |
20100291884 | ALLOCATING TRANSMIT POWER AMONG MULTIPLE AIR INTERFACES - Systems and methods for allocating transmit power among multiple interfaces in a wireless communication system are disclosed. In one embodiment, the method comprises determining a first power level that is used for transmitting over a first air interface, determining a maximum power level available for transmitting over a second interface, comparing the first power level to the maximum power level, determining a second power level that is used for transmitting over the second air interface based on the comparison of the first power level to the maximum power level, and generating a power-based payload constraint based on the second power level. | 11-18-2010 |
20100311357 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - When SRS serving as a base of CSI measurement at a base station apparatus is transmitted from each of two antennas, a control unit controls resource element mappers to make the SRS orthogonal to each other or identical with each other in terms of frequency or code between the two antennas, in accordance with use of CSI at a base station apparatus. | 12-09-2010 |
20100311358 | TRANSMITTER FOR COMMUNICATIONS SYSTEM - An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station. | 12-09-2010 |
20100323637 | METHOD AND APPARATUS FOR CONVEYING ANTENNA CONFIGURATION INFORMATION VIA MASKING - A method, apparatus and computer program product are provided for conveying information regarding the antenna configuration and/or the transmission diversity scheme to a recipient, such as a mobile device. In particular, information regarding the antenna configuration and/or the transmission diversity scheme can be conveyed by masking, such as cyclic redundancy check masking, to provide information regarding the antenna configuration and/or the transmission diversity scheme. In this regard, a set of masks can be determined based upon hamming distances between the masks and bit diversities between the masks and where each of the masks within the set is associated with an antenna configuration and a transmission diversity scheme. | 12-23-2010 |
20110009078 | RADIO TRANSMISSION SYSTEM AND ELECTRONIC DEVICE - A radio transmission system includes: a first electronic device; and a second electronic device having a mounting structure mounted with the first electronic device, wherein a millimeter wave signal transmission line capable of transmitting information in a millimeter wave band is formed between the first electronic device and the second electronic device when the first electronic device is mounted in the mounting structure of the second electronic device, and between the first electronic device and the second electronic device, a transmission object signal is converted into a millimeter wave signal and then the millimeter wave signal is transmitted via the millimeter wave signal transmission line. | 01-13-2011 |
20110009079 | RADIO TRANSMISSION DEVICE - To obtain maximum throughput in accordance with characteristics of a propagation path, a radio transmission device having a plurality of transmitting antennas ( | 01-13-2011 |
20110014884 | WIRELESS MULTI-CARRIER CODE DIVISION MULTIPLEXING COMMUNICATION APPARATUS USING TRANSMIT DIVERSITY SCHEME - Provided is a wireless multi-carrier code division multiplexing communication apparatus that may transmit data using a transmit diversity scheme. A transmission apparatus may include: a space-time coding unit to perform space-time encoding of transmission data to generate a plurality of data streams; a radio resource code generation unit to generate a radio resource code vector by referring to radio resource allocation information associated with a reception apparatus; a signal generation unit to generate a plurality of code division multiplexing signals corresponding to a plurality of transmit antennas, respectively, by multiplying the radio resource code vector and the plurality of data streams; and a transmission unit to transmit the plurality of code division multiplexing signals to the reception apparatus via the plurality of transmit antennas. Accordingly, it is possible to effectively transmit data using a transmit diversity scheme in a wireless multi-carrier code division multiplexing communication system. | 01-20-2011 |
20110028106 | SYSTEM AND METHOD FOR MODULATING DATA ADAPTIVELY USING SELECTION OF MULTI ANTENNA - An adaptive modulation apparatus and method using a multiple antenna selection scheme are provided. The adaptive modulation method using the multiple antenna scheme includes: selecting one transmit antenna from a plurality of transmit antennas; determining a target transmission rate of the selected transmit antenna to transmit the determined target transmission rate to a multiple antenna reception apparatus; receiving, from the multiple antenna reception apparatus, feedback information including information regarding whether to accept the target transmission rate; and transmitting data to the multiple antenna reception apparatus using the received feedback information. | 02-03-2011 |
20110053527 | UPLINK TRANSMIT DIVERSITY ENHANCEMENT - A method for uplink transmit diversity enhancement is disclosed. A subset of two or more potential uplink transmission configurations are determined. A subset of potential uplink transmission configurations is evaluated. An uplink transmission configuration is selected based on the evaluation. Metrics of the selected uplink transmission configuration are determined. The selected uplink transmission configuration is applied for an extended use period. | 03-03-2011 |
20110081875 | ANTENNA PORT MODE AND TRANSMISSION MODE TRANSITIONS - A wireless communication device may autonomously transition from a multiple antenna port mode to a single antenna port mode. The wireless communication device may implicitly notify a base station about the autonomous transition from the multiple antenna port mode to the single antenna port mode. The base station may reallocate resources that were previously allocated to the wireless communication device but that are no longer being used by the wireless communication device. In some cases, the base station may configure the wireless communication device's antenna port mode via radio resource control signaling. | 04-07-2011 |
20110098010 | RADIO TRANSMISSION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO TRANSMISSION METHOD - A radio transmission system includes: antenna pairs, each antenna pair being a combination of a transmitting antenna and a receiving antenna in one-to-one correspondence. A radio signal from the transmitting antenna in one of the antenna pairs reaches the receiving antenna of the one antenna pair as a desired wave directly, and a radio signal from the transmitting antenna of another antenna pair different from the one antenna pair reaches the receiving antenna of the one antenna pair as an unnecessary wave directly. A transfer characteristic correction section which performs a correction operation based on the transfer characteristic of a transmission space between the transmitting antenna and the receiving antenna for a transmission-target signal corresponding to the transmitting antenna, and a modulation functional section which modulates a carrier signal with a corrected signal after having been corrected by the transfer characteristic correction section and transmits the modulated carrier signal from the corresponding transmitting antenna, are provided in correspondence with each antenna pair. | 04-28-2011 |
20110143696 | PUSCH TRANSMIT DELIVERY SCHEME SELECTION - Certain aspects of the present disclosure relate to a method for uplink wireless communications. In one aspect, a diversity scheme may be selectively and adaptively applied to an uplink transmission based on a determination of whether the uplink transmission comprises one or more orphan symbols. According to an aspect, the determination is made based on whether a sounding reference signal is received in the uplink subframe and whether the uplink subframe is configured with a normal or extended cyclic prefix. | 06-16-2011 |
20110151806 | MULTIPLE ENVELOPE TRACKING SYSTEM FOR AN ACTIVE ANTENNA ARRAY - An active antenna array comprises a plurality of transmission paths, a plurality of variable power supply units, and an envelope detection system. The transmission paths are adapted to carry a plurality of similar transmission path signals, and the plurality of transmission paths comprises an amplifier having a power input and a signal input for one of the plurality of similar transmission path signals. The plurality of variable power supply units is connected to the power input of the amplifier for supplying power to the amplifiers. Each of the plurality of variable power supply units comprises an envelope signal input. The envelope detection system is connected to the envelope inputs of the plurality of variable power supply units and adapted to provide a common envelope signal for the plurality of similar transmission path signals to the plurality of variable power supply units. A method for envelope tracking and computer program products for manufacture and method execution are also claimed. | 06-23-2011 |
20110237208 | HYBRID PHASE SWEEPING FOR MOBILE TRANSMIT DIVERSITY - An improved method and apparatus for Mobile Transmit Diversity (MTD), or Uplink Transmit Diversity (ULTD) is disclosed. The mobile device either selects the best antenna at any given time, or transmits from both antennas using the best beam forming phase without feedback from the base station on which antenna to transmit from or which phase to use if using two antennas. Essentially operating in Open Loop MTD, a Hybrid Phase Sweeping algorithm requires testing of a fraction of phase hypotheses resulting in improved base station performance and higher data rates for the user. | 09-29-2011 |
20110244816 | WIRELESS COMMUNICATION APPARATUS AND METHOD - According to one embodiment, a wireless communication apparatus includes a perturbation vector addition unit, a weight multiplication unit and a normalization coefficient multiplication unit. The perturbation vector addition unit is configured to add a perturbation vector only to a first data signal of a first transmission signal containing a first pilot signal and the first data signal, and obtain a second transmission signal containing a second pilot signal and a second data signal. The weight multiplication unit is configured to multiply each of the second pilot signal and the second data signal by a weight for removing interference on a reception side, and obtain a third transmission signal containing a third pilot signal and a third data signal. The normalization coefficient multiplication unit is configured to multiply each of the third pilot signal and the third data signal by a common normalization coefficient for normalizing a total transmission power. | 10-06-2011 |
20110250854 | RECONFIGURABLE WIRELESS TRANSMISSION SYSTEM - A wireless transmission system supporting at least first and second high-isolation transmission modes. In the first TX mode, first and second incoming data streams are processed independently within first and second TX paths to generate first and second analog outgoing signals for separate transmission via first and second antennas. In the second TX mode, the two incoming data streams are combined to form a combined data stream. First and second versions of the combined data stream are processed by the first and second TX paths to generate two analog signals that are combined for transmission via a single antenna. In the second TX mode, a feedback signal, based on differences between the two analog signals, is used to adjust the relative phase and/or delay of the two versions of the combined signal in the digital domain to reduce phase differences between the two analog signals, thereby increasing signal transmission power. | 10-13-2011 |
20110250855 | WIRELESS TRANSMITTER - A wireless transmitter that includes a phase rotating unit which adds phase rotation to signals which are respectively input to antennas and adds first phase rotation for controlling the maximum delay time between the antennas and a second phase rotation for controlling the phases of arbitrary antennas among the antennas, wherein scheduling of users is performed on a per-chunk basis where a region defined in a frequency domain and in a time domain is divided into chunks in the frequency domain and in the time domain, and in the case in which the frequency bandwidth of the chunk is Fc, the phase rotating unit adds the first phase rotation so that the maximum delay time between the antennas is set to either a predetermined first value which is smaller than 1/Fc or a predetermined second value which is larger than 1/Fc. | 10-13-2011 |
20120034885 | BROADCASTING SYSTEM AND METHOD USING HUMAN BODY COMMUNICATION - A transmitter includes a human body communication unit to detect an available broadcast channel; a channel setting unit to set the available broadcast channel to be connected; a broadcast data processing unit to generate a broadcast signal to be transmitted via the human body communication unit. A receiver includes a human body communication unit to receive broadcast signal; a channel setting unit to retrieve the broadcast channel to be connected; a broadcast processing unit to control the human body communication unit to receive the broadcast signal; and a broadcast data processing unit to generate broadcast data. A method for transmitting a broadcast signal includes detecting and setting the available broadcast channel to be connected; generating the broadcast signal; and broadcasting the broadcast signal via the broadcast channel. A method for receiving broadcast signal includes receiving, retrieving, and setting the broadcast channel; receiving the broadcast signal; and generating broadcast data. | 02-09-2012 |
20120064846 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTER, AND CONTROL PROGRAM FOR WIRELESS TRANSMITTER - By switching between an SFBC and a CDD according to required transmission power in an uplink, the transmission diversity of the uplink is efficiently performed. A wireless transmitter which includes transmitting antennas | 03-15-2012 |
20120094622 | ANTENNA DIVERSITY SYSTEM - An antenna diversity system having a non-interrupt function is provided. The antenna diversity system includes: a plurality of antennas, a plurality of radio frequency (RF) circuits, and a signal processing unit. The RF circuits are respectively coupled to the antennas, wherein each RF circuit is utilized for operating in one of a plurality of channels. The signal processing unit is coupled to the RF circuits, and utilized for determining whether a signal quality value of at least one of the antennas lower than a threshold to generate a determining result, and determining whether to change the channel of at least one of the RF circuits according to the determining result, so as to make at least two of the RF circuits operating in a same channel of the channels. | 04-19-2012 |
20120108186 | TRANSMITTER WITH MULTIPLE TRANSMIT ANTENNAS USING POLARIZATION - A transmitter for transmitting data in a cellular radio system is provided. The transmitter transmits data to User Equipment(s) using multiple transmitting antennas, using at least two polarization formers generating orthogonal polarizations of an input data stream. The transmitter further comprises a transmitter diversity arrangement adapted to receive input data to be transmitted to the User Equipment(s), where the transmitter diversity arrangement is connected to the input terminals of the polarization formers. By combining transmitter diversity with polarization former weights, orthogonality between multiple, in particular 4, transmitting antennas can be obtained. | 05-03-2012 |
20120129473 | METHOD AND APPARATUS FOR OPTIMIZING CURRENT CONSUMPTION OF AMPLIFIERS WITH POWER CONTROL - Apparatus and method for reducing the current consumption and increasing the efficiency of an RF power amplifier (PA), according to which the load, connected to the output stage of the PA, tuned dynamically or statically for each level of the desired output power. By doing so, the output impedance of the output stage is essentially matched, such that the dynamic RF load line has a slope that corresponds to the impedance required to provide this level. Whenever a smaller output power is desired in response to reduction in the input signal to the amplifier, the load is further tuned, such that the dynamic or static RF load line has a slope that causes the power amplifier to essentially remain in saturation at the smaller output power. | 05-24-2012 |
20120178388 | Minimizing Mutual Coupling - Disclosed herein are techniques, systems, and methods relating to minimizing mutual coupling between a first antenna and a second antenna. In one implementation, a plurality of antennas and at least one tuning module are provided. A control module may be coupled to the tuning module. The control module may be configured to control the at least one tuning module to alter a phase and an amplitude of a control signal communicated to at least one of the plurality of antennas to reduce mutual coupling between the plurality of antennas. | 07-12-2012 |
20120202439 | POWER AMPLIFIER ADJUSTMENT FOR TRANSMIT BEAMFORMING IN MULTI-ANTENNA WIRELESS SYSTEMS - One or more beamsteering matrices are applied to one or more signals to be transmitted via multiple antennas. After the one or more beamsteering matrices are applied to the one or more signals, the plurality of signals is provided to a plurality of power amplifiers coupled to the multiple antennas. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and relative signal energies are determined based on the determined signal energies. Output power levels of the plurality of power amplifiers are adjusted based on the determined relative signal energies. | 08-09-2012 |
20120252381 | TRANSMITTER FOR COMMUNICATIONS SYSTEM - An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station. | 10-04-2012 |
20120309330 | Method and System of Adaptive Communication in the HF Band - A method for adaptive communication in an HF frequency band includes at least one of the following steps: the determination of a payload subband S that is available for a transmission in the HF band, the selection in the payload subband S of a set of n frequency channels of identical width according to a frequency allocation plan and the quality of the link of each of said channels, or the simultaneous transmission on the n frequency channels of a signal complying with an HF waveform. | 12-06-2012 |
20120309331 | MODULAR MILLIMETER-WAVE RADIO FREQUENCY SYSTEM - A modular millimeter-wave radio frequency (RF) system comprises a plurality of active antenna arrays for receiving and transmitting millimeter-wave RF signals; and a plurality of RF sub-modules for performing at least up and down conversions of intermediate frequency (IF) signals and controlling the plurality of antenna arrays, each of the plurality of RF sub-modules is connected to an antenna array of the plurality of antenna arrays, wherein the plurality of RF sub-modules are chained to each other through a first transmission line and one of the plurality of RF sub-modules is connected to a baseband module through a second transmission line, each of the first transmission line and the second transmission line transfers a multiplexed signal including an IF signal, a local oscillator (LO) signal, a control signal, and a power signal. | 12-06-2012 |
20130040585 | RADIO COMMUNICATION APPARATUS AND REFLECTED WAVE ACQUISITION METHOD - A first output device has a first port, a second port, and a third port, and outputs from the second port a transmission signal supplied to the first port. A second output device has the same ports as those of the first output device, outputs from the second port the transmission signal supplied to the first port from the first output device, and outputs from the third port a reflected wave supplied to the second port from an antenna. A phase shifter inverts a phase of a signal output from the third port of the first output device. An adder adds a signal output from the third port of the second output device and a signal output from the phase shifter. | 02-14-2013 |
20130084814 | COMMUNICATION SYSTEM AND METHOD - A communication system including a first station having at least two first narrow beam antennas and a second station having at least two second narrow beam antennas. The first and second stations establish a first communication path for wireless communication via a pair of first and second narrow beam antennas. When communication via the first communication path is disturbed by obstacles, the first and second stations automatically establish at least one alternative communication path, which is spatially different from the first communication path, for wireless communication using the at least two first narrow beam antennas and the at least two second narrow beam antennas. | 04-04-2013 |
20130084815 | TRANSMITTING DEVICE AND METHOD FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE AND METHOD FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - A transmitting device for transmitting signals carrying data in a wireless communication system, including at least two beam antennas, each beam antenna having a main beaming direction at a different angle; a generator configured to generate a number of signal streams to be transmitted over a wireless communication channel within the wireless communication system, wherein each of the signal streams includes a different version of the data and the number of signal streams corresponds to the number of the at least two beam antennas, wherein each signal stream is transmitted over the wireless communication channel via a different beam antenna of the at least two beam antennas; and a cyclic delay diversity unit configured to cyclically shift each different version of data and to use cyclic delay diversity. | 04-04-2013 |
20130109333 | METHOD AND SYSTEM FOR SWITCHED COMBINED DIVERSITY WITH A MODAL ANTENNA | 05-02-2013 |
20130137387 | RF TRANSMITTER FOR ELECTRICALLY SHORT ANTENNA - An RF transmitter comprises a capacitive energy storage, an output stage and a switching circuit with an open state and a closed state. The capacitive energy storage forms with the antenna when connected thereto a resonance circuit with a resonance frequency and a quality factor. The output stage provides an electric transmission signal to the resonance circuit. The switching circuit comprises a first transistor for switching between the open state and the closed state and is connected to an antenna output terminal through a capacitance formed by the capacitive energy storage such that the maximum signal voltage occurring across the switching circuit in its open state is lower than the maximum signal voltage occurring across the antenna output terminals. The transmitter is adapted to alter the quality factor by changing the series resistance of the switching circuit in its closed state. | 05-30-2013 |
20130143505 | SYSTEM, METHOD AND APPARATUS FOR TRANSMIT DIVERSITY CONTROL BASED ON VARIATIONS IN PROPAGATION PATH - A method and apparatus for applications of identification of variations of propagation path to transmit diversity control. Transmit diversity parameters may be modified according to detected dynamics, which may, for example, be related to changes in actual propagation and network conditions. Such dynamics may be referred to as mobility parameters. Mobility parameters may apply to variability in a propagation path due to any conditions. Determination of a mobility parameter may be conducted using one or more of multiple parameters available to the mobile terminal. Such feedback information indication, which is related to the propagation path conditions, may be provided to the apparatus, which would attempt to find a more desired mode of operation, which may lead to reduction in power and the improvement of the quality of transmission. | 06-06-2013 |
20130165059 | BEAMFORMING APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM - Provided is a beamforming apparatus in a receiver in a mobile communication system. The beamforming apparatus includes a Local Oscillator (LO) signal generator for generating an LO signal; a phase shifter for generating a predetermined number of phase-shifted LO signals with respect to the generated LO signal; a switching network for mapping the phase-shifted LO signals to RF signals received via a plurality of receive paths; and a mixer for mixing the RF signals with the mapped LO signals to down-convert a frequency of the RF signals. | 06-27-2013 |
20130189938 | TRANSMISSION DEVICE - The transmission device is constituted by transmitting units which are accommodated within a case in a state so that, in an xyz orthogonal coordinate system, in the z axis direction only two transmitting units are disposed adjacently and so that planar conducting plates are opposed to each other; in the x axis direction, two adjacent transmitting units are disposed so that one end portion of one unit and the other end portion of the other unit are adjacent; and in the y axis direction, two adjacent transmitting units are disposed so that one end portion of one unit and the other end portion of the other unit are adjacent. | 07-25-2013 |
20130244598 | MODULAR FREQUENCY DIVIDER AND MIXER CONFIGURATION - A transmitter including a first mixer, a first frequency divider to divide a frequency of an input signal to generate a first signal, and a plurality of second frequency dividers to divide the frequency to respectively generate a plurality of second signals, and a control module. In response to the transmitter being turned on, the control module turns on the first frequency divider, turns off the plurality of second frequency dividers, and drives the first mixer with the first signal. Subsequently, in response to determining that a transmit power of the transmitter is to be increased, the control module sequentially turns on and connects each of the plurality of second frequency dividers in parallel to the first frequency divider. Upon a second frequency divider being connected to the first frequency divider, the control module also drives the first mixer using the second signal generated by that second frequency divider. | 09-19-2013 |
20130316665 | Method 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. | 11-28-2013 |
20140018019 | PHASED-ARRAY SMART ANTENNA AND METHODS FOR OPERATING THE PHASED-ARRAY SMART ANTENNA - A phased-array smart antenna for transmitting an electronic wave signal having a wavelength includes a first antenna, a second antenna, and a third antenna. The first antenna, the second antenna, and the third antenna form a triangle and are respectively located at three vertices of the triangle. The first antenna, the second antenna, and the third antenna are activated at the same time for transmitting the electronic wave signal. | 01-16-2014 |
20140128011 | ANTENNA SYSTEM AND SIGNAL TRANSMIT DEVICE - Embodiments of the present invention provide an antenna system that includes: at least one antenna unit group, wherein at least two antenna units are arranged in the vertical direction in each antenna unit group, and each antenna unit includes two antennas which are crosswise arranged, where carrier frequency signals transmitted by the at least one antenna unit group are identical, and a gap between adjacent antenna units which transmit any identical carrier frequency signal in each antenna unit group is a half wavelength of a frequency of the transmitted carrier frequency signal; and the number of antenna units which transmit each type of carrier frequency signals is determined by a gap between adjacent antenna units which transmit the type of carrier frequency signals and the coverage radii of at least two types of carrier frequency signals transmitted by the antenna unit group. | 05-08-2014 |
20140134965 | SYSTEM, METHOD AND APPARATUS FOR TRANSMIT DIVERSITY CONTROL BASED ON VARIATIONS IN PROPOGATION PATH - A method and apparatus for applications of identification of variations of propagation path to transmit diversity control. Transmit diversity parameters may be modified according to detected dynamics, which may, for example, be related to changes in actual propagation and network conditions. Such dynamics may be referred to as mobility parameters. Mobility parameters may apply to variability in a propagation path due to any conditions. Determination of a mobility parameter may be conducted using one or more of multiple parameters available to the mobile terminal. Such feedback information indication, which is related to the propagation path conditions, may be provided to the apparatus, which would attempt to find a more desired mode of operation, which may lead to reduction in power and the improvement of the quality of transmission. | 05-15-2014 |
20140148108 | NOVEL TUNABLE WIDEBAND RF TRANSMITTER INTERFACE - One embodiment of the present invention provides a multi-band RF transmitter. The RF transmitter includes an RF integrated circuit (IC) chip that includes a plurality of identical wideband ports for outputting modulated RF signals, a plurality of narrowband power amplifiers (PAs), and a plurality of matching networks. A respective narrowband power amplifier (PA) is coupled to a wideband port of the RF IC chip via a respective matching network. | 05-29-2014 |
20140199954 | COMMUNICATION SYSTEM FOR SPATIALLY-ENCODED WIRELESS COMMUNICATIONS - A method of spatially-encoded wireless transmission using a wireless communications device that is configured with an electromagnetic radiator involves applying a modulated carrier to one or more radiator elements of the electromagnetic radiator. The radiator elements are selected based on instantaneous samples of baseband information, and the modulated carrier is generated from the baseband information. The modulated carrier is then transmitted via the selected radiator elements. | 07-17-2014 |
20140235184 | World Band Radio Frequency Front End Module, System And Method Thereof - The present disclosure relates to a World Band Radio Frequency Power Amplifier and a World Band Radio Frequency Front End Module. The World Band Power Amplifier can contain at least one broadband power amplifier connected to a switch which can direct an RF input signal to a plurality of transmission paths, each transmission path configured for a different frequency. The World Band RFFE Module is more integrated version of the World Band Power Amplifier that can contain broadband RF PA(s), switches, logic controls, filters, duplexers and other active and passive components. | 08-21-2014 |
20140302804 | Allocating transmit power among multiple air interfaces - Systems and methods for allocating transmit power among multiple interfaces in a wireless communication system are disclosed. In one embodiment, the method comprises determining a first power level used for transmission over a first air interface, determining a second power level used for transmission over a second air interface, comparing a composite of the first power level and the second power level to a threshold power level, and adjusting the second power level based on the comparison. | 10-09-2014 |
20150094003 | SYSTEMS AND METHODS FOR TRANSMIT ANTENNA SWITCHING - A method for antenna switching is described. The method includes transmitting using a first antenna. The method also includes determining that a trigger occurs to switch to transmitting using a second antenna. The trigger is based on a combination of a physical uplink shared channel (PUSCH) maximum transmit power level (MTPL) counter and a physical uplink control channel (PUCCH) MTPL counter. The method further includes switching to transmitting using the second antenna based on the determination. | 04-02-2015 |
20150140940 | APPARATUS FOR TRANSMITTING MULTIPLE STREAMS AND METHOD FOR TRANSMITTING MULTIPLE STREAMS - Disclosed is an apparatus for transmitting multiple streams, including: a polarized wave control unit generating non-orthogonal polarization information for three or more input streams; a polarized wave generating unit polarizing three or more input streams in a baseband based on the non-orthogonal polarization information to generate vertical and horizontal polarization components; and a polarized wave transmitting unit transmitting the plurality of vertical and horizontal polarization components through dual polarization antennas. | 05-21-2015 |
20150140941 | SYSTEMS AND METHODS OF TRANSMITTER PROTECTION FOR WIRELESS COMMUNICATIONS - Various embodiments provide for systems and methods for wireless communications that implement transmitter protection schemes using spatial combining. The protection scheme implemented by some embodiments provides for a number of benefits, including without limitation: hitless protection; constant power monitoring for each wireless channel being utilized; extra gain to wireless signals transmitted; beam steering, beam hopping, and beam alignment capabilities; and varying levels of transmission path protection (e.g., 1+1 protection, or 1+N protection). Additionally, the features of some embodiments may be applied to a variety of wireless communications systems including, for example, microwave wireless systems, cellular phone systems and WiFi systems. | 05-21-2015 |
20150365142 | EFFICIENT LARGE-SCALE MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATIONS - Methods and systems for beam forming include measuring channel state information for a set of different codebook entries. An angle of arrival (AoA) distribution is determined with a processor using compressive testing based on the measured channel state information. A set of phase shift values is determined based on the determined AoA to perform phased array beamforming. | 12-17-2015 |
20150365143 | EFFICIENT LARGE-SCALE MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATIONS - Methods and systems for beam forming, implemented in a base station used in a communication system, include measuring channel state information (CSI) for a number of active phased-array antennas less than a full number of phased-array antennas. Analog beam forming weights are determined using the measured CSI. An optimal digital precoder is determined from the analog beam forming weights. The analog beam forming weights and optimal digital precoder are applied to one phased-array antenna. | 12-17-2015 |
20160014612 | COGNITIVE USE OF MULTIPLE REGULATORY DOMAINS | 01-14-2016 |
20160043780 | HORIZONTALLY POLARIZED OMNIDIRECTIONAL ANTENNA AND ANTENNA DEVICE INCORPORATING THE SAME - An antenna includes a pair of first and second slot antenna bodies that integrally intersect each other and that are perpendicular to each other. The first and second slot antenna bodies are adapted to respectively receive a first radio frequency (RF) signal and a second RF signal that have the same magnitude and a 90-degree phase difference. Upon receipt of the first and second RF signals, the antenna is capable of producing a horizontally polarized omnidirectional radiation pattern. | 02-11-2016 |
20160065248 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION SYSTEM - A radio communication device includes: a processor configured to execute a program; and a memory configured to store the program, wherein the processor performs, based on the program, operations to: detect communication quality of each of a plurality of channels; and lower a first set modulation level of a first channel with the communication quality which is equal to or lower than a level and a second set modulation level of a first adjacent channel as at least one of two adjacent channels adjacent to the first channel in a frequency axis direction. | 03-03-2016 |
20160142126 | METHOD AND APPARATUS FOR BEAMFORMING USING POLARIZED ANTENNA IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for beamforming using a polarized antenna in a wireless communication system are disclosed. The apparatus includes a processor configured to process a signal, and a multi-polarized antenna including a plurality of antenna elements, configured to transmit the signal. The plurality of antenna elements include an electric-field dipole antenna and a magnetic-field dipole antenna, and a current is applied to the electric-field dipole antenna and the magnetic-field dipole antenna in the same direction or in opposite directions. | 05-19-2016 |
20160149315 | DUAL POLARIZED ANTENNA ARRAY - Described herein are architectures, platforms and methods for implementing an antenna array with a dynamic polarization adjustment in a portable device. | 05-26-2016 |
20160156325 | SYSTEM AND METHOD FOR ELECTRONICALLY ADJUSTABLE ANTENNA | 06-02-2016 |
20160164592 | DISTRIBUTED DIGITALLY CONVERTIBLE RADIO (DDCR) - Embodiments of a hybrid unit that supports a configurable number of radio units for a base station in a cellular communications network and embodiments of Distributed Digitally Convertible Radio Units (DDCRUs) for use with the hybrid unit are disclosed. In one embodiment, a hybrid unit for a base station in a cellular communications network is provided. The hybrid unit includes an analog hybrid matrix. The analog hybrid matrix includes a number of feeder ports operative to connect to at least one radio unit and up to a number of radio units that are external to and separate from the hybrid unit. In one preferred embodiment, the radio unit(s) is(are) DDCRU(s). The analog hybrid matrix also includes a number of antenna ports operative to connect to at least one and up to a corresponding number of antennas of the base station. | 06-09-2016 |
20190149250 | METHOD FOR CALIBRATING AN ANTENNA SYSTEM, CONTROL DEVICE, COMPUTER PROGRAM AND COMPUTER PROGRAM PRODUCTS | 05-16-2019 |