Entries |
Document | Title | Date |
20080198901 | System For a Fast Frequency Hopping Radio - The invention discloses a system ( | 08-21-2008 |
20080212652 | WIRELESS COMMUNICATIONS APPARATUS - MIMO UWB Communications apparatus is configured to send out a channel estimation sequence comprising a plurality of sequentially transmitted symbols in accordance with a first band hopping sequence, sent from one antenna of the apparatus, while another antenna is transmitting another sequence of channel estimation symbols in accordance with another, complementary band hopping sequence. A legacy device will be capable of synchronising with the channel estimation symbols sent in accordance with the first band hopping sequence, while a MIMO receiver will be able to determine channel estimates for all MIMO channels on the basis of the combined channel estimation transmissions. | 09-04-2008 |
20080260000 | Method and System for Capacity and Coverage Enhancement in Wireless Networks With Relays - A method and system for capacity and coverage enhancement in wireless networks is provided. Each cell has a base station and in-cell relay stations. The base station includes interference avoidance/averaging mechanism, dynamic resource partitioning mechanism or a combination thereof. The interference avoidance/averaging mechanism dynamically creating a FH pattern based on interference information obtained from its serving cell. The base station may include a scheduler for dynamic resource partitioning mechanism for managing scheduling in the cell. | 10-23-2008 |
20080273577 | Method and apparatus for non-cooperative coexistence between wireless communication protocols - A method and apparatus of reducing interference between wireless communication protocols is disclosed. The method comprises reducing interference between a first wireless communication protocol operating in a first frequency band and a second wireless communication protocol operating in a second frequency band by generating noise to cause interference with one or more frequencies in the second frequency band and performing Adaptive Frequency Hopping (AFH) in the second wireless communication protocol to avoid the one or more frequencies in the second frequency band in which interference is caused by the noise. | 11-06-2008 |
20080285626 | EXCLUSIVE PAIRING TECHNIQUE FOR BLUETOOTH COMPLIANT MEDICAL DEVICES - A method and system of establishing communications between at least two independent software modules in a safety critical system, such as a medical system, is provided. The design comprises providing an exclusive Bluetooth connection between at least two wireless devices. A master wireless device is configured with Bluetooth master device functionality and a slave wireless device is configured with Bluetooth slave device functionality. The wireless devices are employed in performing a medical procedure. The method further comprises acquiring a stored unique address from the slave wireless device over the Bluetooth connection, comparing the stored unique address to a master wireless device unique address available at the master wireless device, and exclusively pairing the master wireless device and the slave wireless device when the unique address acquired from the slave wireless device is found to identically match the master wireless device unique address. | 11-20-2008 |
20080310480 | Reception of Wideband Signals with High Temperature Superconducting Components to Reduce Co-Site Interference - A comb limiter combiner for front end filtering reduces bit error rates with an increased reception range. Notch filters are tuned to suppress interfering frequency-hopped signals. An output comb filter suppresses out-of-band intermodulation products generated by any non-linear devices (such as limiters and the notch filters) in each of the comb limiter combiner sub-bands. Sensitivity is further increased by the use of cryogenically cooled high temperature superconductor components for the filters, amplifiers, and limiters used in each sub-band. | 12-18-2008 |
20090060001 | COGNITIVE FREQUENCY HOPPING RADIO - A cognitive frequency hopping radio includes a cognitive engine to actively monitor frequency spectrum to adapt transmission characteristics of the cognitive radio to communicate with other devices operating in the network. A frequency hopping block controls the transmitter to transmit radio signals by switching a carrier among many frequency channels using a pseudo-random sequence. The cognitive frequency hopping radio uses the short dwell times to essentially prevent harmful interference to incorrectly identify vacant channels. | 03-05-2009 |
20090067476 | WIRELESS COMMUNICATION SYSTEM AND METHOD - Disclosed is a wireless communication system in which a mobile station transmits a plurality of reference signals upon placing the reference signals in temporally spaced-apart relation in at least one of information transmission units wirelessly transmitted in conformity with a hopping period, and a base station receives an information transmission unit that has been transmitted from the mobile station and, if this information transmission unit is one that includes a plurality of the reference signals, obtains a phase fluctuation from the plurality of reference signals and obtains a frequency deviation from the phase fluctuation. | 03-12-2009 |
20090097531 | SYSTEM AND METHODS FOR SECURING DATA TRANSMISSIONS OVER WIRELESS NETWORKS - A method of communicating over a network for wireless communications is disclosed. The method transmits encoded data from a source device to a destination device via a single path up through a plurality of wireless paths using a random frequency hopping tuning pattern for wireless communications, and pseudo-randomly varies dwell times of the frequency hopping tuning pattern over which the data is transmitted. The network uses forward-error correction coding redundancy within a data burst to allow recovery of corrupted data in any partially jammed hop of the transmitted data. | 04-16-2009 |
20090122838 | Transmission Device, Reception Device, Communication System, Transmission Method and Program - A transmission device of the present invention includes a MAC that generates data I transmitted by a band group M and generates data J transmitted by a band group N; signal switching parts that exchange a part of the data I and a part of the data J; and antennas that simultaneously transmit the data I and the data J after data exchange is performed by the signal switching parts, by the band group M and the band group N. | 05-14-2009 |
20090129443 | Multi-Channel Transmission System, Transmitting Apparatus and Transmitting Method - A transmitter ( | 05-21-2009 |
20090161729 | Wideband frequency hopping spread spectrum transceivers and related methods - Systems and methods are disclosed that provide ultra-wideband frequency hopping spread spectrum (UWB-FHSS) solutions for transceiver architectures. These UWB-FHSS transceiver architectures can transmit and accurately digitize frequency hops over an extremely wide bandwidth while using a relatively slow analog-to-digital converter (ADC) without suffering from unacceptable performance degradation. For example, ADCs can be used having sample rates lower than standard Nyquist criteria would require for the bandwidth of the spread spectrum utilized. | 06-25-2009 |
20090168845 | HOPPED ULTRAWIDEBAND WIRELESS - In some embodiments a transceiver includes a quadrature phase-shift keying modulator and/or demodulator to transmit and/or receive a frequency-hopping ultrawideband radio signal. Other embodiments are described and claimed. | 07-02-2009 |
20090168846 | Creation and use of unique hopping sequences in a frequency-hopping spread spectrum (FHSS) wireless communications network - A method for generating and using frequency-hopping sequences in frequency-hopping spread spectrum (FHSS) networks, such that no additional network overhead is required to convey a device's hopping sequence to another device, is disclosed. Furthermore, a method to maximize the number of unique hopping sequences, without increasing the random access memory (RAM) requirements on the network devices, is disclosed. | 07-02-2009 |
20090175318 | MULTI-LEVEL HIERARCHICAL RADIO-FREQUENCY COMMUNICATION SYSTEM - Portable measuring devices which communicate by low power transceivers through a communication controller with a printer device collect weight and size data on articles to be shipped. The collected weight and size data are combined with origin and destination data, and labels are printed bearing pertinent shipping and routing information in machine readable format. The labels are attached to the articles to be shipped and accompany the articles to their respective destinations. At transfer points the labels are read by scanner devices which also communicate by low power transceiver links with the communication controller. The wireless linking of the scanner devices promotes human safety by the absence of cords which could cause entanglement of an operator in mechanized conveying equipment. The communication controllers at each stage of the shipping process have the capability of transferring received and updated status information on the shipped articles to a central data station. | 07-09-2009 |
20090185600 | STRENGTHENED FREQUENCY HOPPING COMMUNICATION METHOD AND DEVICE - The invention relates to a frequency hopping communication method in which the data travels over time-variable frequency bearers. A frequency bearer is defined as a subset pair of carriers in a channel of a set of frequency channels (RF). The choice of the frequency bearers is derived from a pseudo-random draw. | 07-23-2009 |
20090185601 | CHANNEL QUALIFICATION FOR AN ADAPTIVE FREQUENCY HOPPING METHOD BY MEANS OF BIT OR PACKET ERROR RATE MEASUREMENT AND SIMULTANEOUS FIELD STRENGTH MEASUREMENT - This disclosure relates frequency channel qualification in wire-free communications system. | 07-23-2009 |
20090196328 | METHOD AND APPARATUS ADAPTED FOR LOCALIZED HOPPING OFDMA AND POWER EFFICIENT OFDMA MULTIPLEXING - An embodiment of the present invention provides an apparatus, comprising a transceiver configured for OFDM transmissions in frequency-contiguous, hopping, sub-channels. | 08-06-2009 |
20090213902 | AUTOMATIC FREQUENCY HOPPING AND CHANNEL TRACKING SYSTEM FOR AUTO-FREQUENCY-HOPPING DIGITAL WIRELESS MICROPHONE - An automatic frequency hopping and channel tracking system for an auto-frequency-hopping digital wireless microphone includes a digital wireless microphone and a digital wireless receiving device. In the event of receiving from the digital wireless microphone a signal having an abnormal quality, the digital wireless receiving device not only automatically switches to another signal receiving channel but also intermittently or periodically generates and transmits an RF signal to the digital wireless microphone, so that the latter automatically switches its signal channel to another signal channel according to the RF channel information. In this manner, the digital wireless microphone and receiving device are able to synchronously and quickly switch to another signal channel to avoid the abnormal signal channel and thereby keep good signal transmission therebetween. | 08-27-2009 |
20090232188 | RETROREFLECTING TRANSPONDER - The Method for transmitting a signal from a transmitter in an area around the transmitter via a satellite comprising the steps of
| 09-17-2009 |
20090238241 | Frequency hopping pattern and arrangment for sounding reference signal - A method, an apparatus, and a computer program that includes forming frequency hopping position of the sounding reference signal is based on a hopping pattern. The hopping pattern of the sounding reference signal is configured to utilize a tree assignment for a frequency allocation of the sounding reference signal and to support at least one frequency band branch per layer. The hopping pattern of the sounding reference signal is also configured to provide consecutive sounding reference signals on widely separated frequency allocations. | 09-24-2009 |
20090245328 | Integer cycle frequency hopping modulation for the radio frequency transmission of high speed data - The invention disclosed in this application uses a method of modulation named Integer Cycle Frequency Hopping (ICFH) wherein a carrier signal, comprised of a continuum of sine waves is generated on a single frequency. A data bit representing either a “1” or a “0”, depending upon the logic polarity chosen by the builder is imposed upon the carrier signal by modifying the carrier signal at precisely the zero crossing point or the zero degree angle. The method of imposing the data is to cause either a lengthening or shortening of the proceeding 360 degrees of phase angle, thus effectively either raising or lowering the frequency of the carrier signal for just the one, or a succession of cycles at hand. Upon completion of the 360-degree cycle(s), the carrier will return to the original frequency. The main carrier frequency is only modulated beginning at the zero degree phase angle and ending at the 360-degree phase angle. In this modulation scheme as few as one sine wave cycle can be used to represent one data bit. The spectral output of a transmitting device using this modulation scheme will be defined by the difference in frequency between the main carrier signal and the modulating frequency. In the resulting signal a modulated segment of the main carrier frequency can represent either a binary “1” or a binary “0”. | 10-01-2009 |
20090257474 | Fast hop frequency hopping protocol - Methods and apparatus, including computer program products, for a fast hop frequency hopping protocol. A method includes transmitting from a radio frequency identification (RFID) interrogator a continuous wave un-modulated radio frequency (RF) signal conforming to a fast hop frequency hopping protocol in which each hop of a plurality of hops spans at least one bit but less than the totality of bits to be sent from a single RFID device data in a single communications session. | 10-15-2009 |
20090262785 | Adaptive Coexistence Between Different Wireless Communication Systems - A first transceiver is operated in a first frequency band in the presence of a second transceiver operating in a second frequency band. Operation includes ascertaining an interference level at the first transceiver due to the second transceiver. A coexistence strategy for the second transceiver is dynamically selected by selecting a frequency division strategy if the ascertained interference level is less than a threshold level and selecting a time division strategy if the ascertained interference level is above the threshold level. The second transceiver is then caused to operate in accordance with the dynamically selected coexistence strategy. | 10-22-2009 |
20090268784 | MULTI-BAND OFDM RECEIVER - A wireless communication arrangement includes a transmitter that transmits a signal having a carrier that repeatedly and sequentially hops through a first sequence of frequencies. A receiver includes a mixer having an antenna signal input for receiving an antenna signal, and a local oscillator for generating a local oscillator signal and providing the local oscillator signal to a local oscillator input of the mixer. The local oscillator signal repeatedly and sequentially hops through a second sequence of frequencies having fewer members than the first sequence of frequencies and the repetition frequency with which the local oscillator signal hops through the second sequence of frequencies is substantially equal to the repetition frequency with which the carrier hops through the first sequence of frequencies. Preferably, the receiver includes an ADC that is sampled at a rate greater than twice the bandwidth of the antenna signal. | 10-29-2009 |
20090274193 | RADIO COMMUNICATION DEVICE AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE USED FOR THE SAME - A semiconductor integrated circuit for a radio communication terminal sequentially uses a plurality of frequency channels by instructions from a hopping frequency decision unit to receive packet data by a reception unit. When the integrated circuit cannot detect the head of the packet data in reception operations, the integrated circuit cannot receive packet data should be received originally then assumes that the received packet data is a packet error. And the integrated circuit calculates packet error rates for each frequency channel on the basis of the number of times of reception operations performed for each frequency channel and of the number of times of packet errors to estimate channel qualities by using the packet error rates. | 11-05-2009 |
20090279587 | FREQUENCY HOPPING OFFSETTING FOR MULTIPLE USERS REUSING ONE SLOT (MUROS) - First and second groups of mobile terminal communications in a cell are defined. A basic frequency hopping sequence for both groups is identified. An offset from the basic hopping sequence is determined for each mobile terminal communication in the first and second groups and is used along with the basic frequency hopping sequence to generate an assigned frequency hopping sequence for each mobile terminal. Some of the assigned frequency hopping sequences overlap such that a first communication from the first group and a second communication from the second group simultaneously use the same time-frequency radio resource during one hop in their corresponding assigned frequency hopping sequences. The first and second mobile terminal communications use a different time-frequency radio resource during another hop in their respective assigned frequency hopping sequence thereby varying the offset for each mobile terminal communication in the second group to improve interference diversity between the two groups for each hop. | 11-12-2009 |
20090316755 | Virtual or Remote Transponder - A system and method for transmitting UAV position data to a central flight control center transmits UAV position data using a virtual transponder. A ground control station for controlling the UAV receives data from the UAV, including UAV position data. The UAV may provide GPS data, or corrected position data based on readings from an inertial navigation system. The ground control station transmits the UAV position data to a flight control center. | 12-24-2009 |
20090316756 | APPARATUS AND METHOD FOR TRANSMISSION OF SOUNDING REFERENCE SIGNAL IN UPLINK WIRELESS COMMUNICATION SYSTEMS WITH MULTIPLE ANTENNAS AND SOUNDING REFERENCE SIGNAL HOPPING - A sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal using the multiple antenna technique is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. Moreover, the sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. The sounding reference signal is transmitted through an antenna pattern in which the sounding reference signal can be transmitted through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead in this environment. | 12-24-2009 |
20090323770 | Techniques using a hop-by-hop approach for automatic repeat request (ARQ) in wireless relay networks - An embodiment of the present invention provides an apparatus, comprising a transceiver adapted for use in a hop by hop (HbH) relay network and configured to enable fast error correction and reduce ARQ overhead by coupling HARQ and ARQ feedback signaling in each hop of the HbH relay network. | 12-31-2009 |
20100002750 | Systems and Methods for Securing a Digital Communications Link - The frequency of a digital data signal, such as a digital video signal, is intentionally varied or hopped before being sent over a network. This frequency hopping may be performed in accordance with a frequency hopping pattern shared with only intended receivers. The digital data signal may be further intentionally pre-distorted in accordance with a pre-distortion pattern which is also shared with only intended receivers. The frequency hopping and/or the pre-distortion patterns may be used to vary the frequency and modulation, respectively, on a periodic basis, such as a symbol-by-symbol or packet-by-packet basis. | 01-07-2010 |
20100046583 | Reliable Wireless Communication System Using Adaptive Frequency Hopping - A method and system, the method including determining a frequency quality measurement value for each of a plurality of frequencies a network coordinator can use in a frequency hopping sequence for communicating with a client, classifying each of the plurality of communication frequencies into one of a plurality of different categories based on a relative ranking of the determined frequency quality measurement value of each of the plurality of frequencies, generating, by the network coordinator, a frequency hopping sequence to be used for communication between the network coordinator and the client, the generated hopping sequence including only select frequencies from the plurality of frequencies in a predetermined number of future time slots that minimize a probability of a predetermined number of consecutive frequency hop failures in the predetermined number of future time slots, and notifying the client of the generated frequency hopping sequence to be used for communication. | 02-25-2010 |
20100054307 | WIRELESS SENSOR NETWORK - A system for event monitoring is disclosed. The system includes a remote sensor, a remote transceiver interfaced to the remote sensor, and a base transceiver that selectively wirelessly communicates with the remote transceiver. The remote transceiver provides a periodic communication to the base transceiver that is indicative of a nominal operating condition and the periodic communication is acknowledged by the base transceiver. | 03-04-2010 |
20100054308 | SYSTEM AND METHOD FOR SELECTING WIRELESS SIGNAL BANDWIDTH BASED ON SIGNAL STRENGTH MEASUREMENTS PROVIDED BY WIRELESS RECEIVERS - A method and system are provided which combine (i) adaptive multi-rate half-rate transmission and (ii) intelligent frequency hopping wherein frequency hopping and intelligent underlay overlay are used simultaneously. In the latter, frequency hopping is controlled on a frequency group by frequency group basis, and one frequency hopping group is made up of one or more regular transmitters of a cell and another frequency hopping group is made up of one or more super reuse (super layer) transmitters of the cell. A wireless terminal (e.g., handset) is used in determining the carrier to interference (C/I) ratio for a received signal. A determination is then made as to whether the C/I ratio is acceptable for super layer transmission, and, if the ratio is acceptable, a super reuse transmitter operating in the superlayer range at the half-rate transmission rate is used to transmit a call to the terminal. | 03-04-2010 |
20100061425 | METHOD AND DEVICE FOR ANTI-INTERFERENCE FIGHTING IN A TELECOMMUNICATIONS SYSTEM - A method for fighting interference in a communication system is disclosed where the links are of frequency-hopping type. The signal has several frequency time slots. The system has at least one main sensor and one or more auxiliary sensors, one or more guard band are inserted between the useful bands of the frequency-hopping signal. The total area of the inserted guard bands is chosen so as to satisfy a chosen value of probability of interference interception. The signals of the inserted guard bands are selected whose level is greater than a given threshold. A set of spatial-filtering weightings are determined, for each time slot of the signal, by taking account of the correlation matrix of the noise plus jammers alone on the signals selected. The baseband signals of the assemblage of extended blocks are filtered by the set of calculated weightings of the time slot so as to generate extended blocks devoid of interference. | 03-11-2010 |
20100074303 | Wireless Communication Apparatus - A wireless communication apparatus comprises a local generator for generating a local signal having a frequency equal to the central frequency of the band group; a first down converter for down-converting a wireless signal in each of the bands into an IF signal; a hopping complex filter for removing an image signal in the frequency range of a band to pass therethrough, among down-converted signals, said hopping complex filter having filter characteristics changeable depending on the hopping between the bands; and a second down converter for converting an IF signal of a band which does not contain said central frequency into a baseband signal in a predetermined frequency range about a DC level. | 03-25-2010 |
20100098134 | METHOD AND APPARATUS FOR USING A SPREAD SPECTRUM INTERMEDIATE FREQUENCY CHANNEL WITHIN AN ELECTRONIC DEVICE - An input signal to a radio device is received and has its frequency spread prior to processing the signal to allow the performance benefits of a spread spectrum signal. After processing, the signal is despread by analog or digital processing to create an output signal. The spreading and despreading functions can be implemented with known techniques or a truly random bit sequence. | 04-22-2010 |
20100103981 | RADIO NETWORK LIST FOR VEHICLE CONTROL AND REAL TIME POSITION DATA - One embodiment of the present invention relates to systems and methods for providing vehicles including construction machines and work vessels at a work site including construction work sites and naval work sites with real time position data from survey units located at the construction work site. In particular, a method according to the present invention includes the steps of accessing a network list identifying vehicles within the site; identifying, by using the network list, a vehicle requiring position data; and initiating a radio communication session with an identified vehicle during which the vehicle is provided with real time position data. | 04-29-2010 |
20100111139 | FREQUENCY HOPPING - A communications system is described in which user devices communicate with an associated base station. The user devices employ frequency hopping techniques to provide frequency diversity in their communications with the base station. Techniques are described for reducing collisions between the communications from the different user devices and for the efficient signalling of data defining the frequency hopping sequence to use. The inventions are particularly suitable for use in the uplink of the E-UTRA communications scheme. | 05-06-2010 |
20100150208 | METHOD AND APPARATUS FOR CONSERVING TRANSCEIVER POWER - The present invention utilizes radio-frequency identification (“RFID”), which consume a small amount of energy, to allow two transceivers with frequency hopping spread spectrum units to discover each other. A first transceiver may, for example, have a first energy capacity, an RFID transceiver, and a first frequency hopping spread spectrum unit. A second transceiver with a lower energy capacity would then have an active RFID tag and a second frequency hopping spread spectrum unit. | 06-17-2010 |
20100246638 | Antenna Selection with Frequency-Hopped Sounding Reference Signals - Embodiments of the invention describe a method for antenna selection (AS) in a wireless communication network. The network includes a base station and a transceiver, wherein the transceiver has a set of antennas, and wherein the transceiver is configured to transmit a frequency-hopped sounding reference signal (SRS) from a subset of antennas at a time. The base station determines a type of a training transmission based on a number of the subbands and a number of subsets in the set of antennas, and transmits an instruction including the type to the transceiver. | 09-30-2010 |
20100254431 | MONITORING DEVICES AND SYSTEMS FOR MONITORING FREQUENCY HOPPING WIRELESS COMMUNICATIONS, AND RELATED METHODS - Monitoring devices and systems comprise a plurality of data channel modules coupled to processing circuitry. Each data channel module of the plurality of data channel modules is configured to capture wireless communications for a selected frequency channel. The processing circuitry is configured to receive captured wireless communications from the plurality of data channel modules and to organize received wireless communications according to at least one parameter. Related methods of monitoring wireless communications are also disclosed. | 10-07-2010 |
20100260232 | FREQUENCY-HOPPING SCHEME - A method comprises generating, by logic, a random number. The method also comprises determining a next frequency in said sequence using the random number and one or more of a minimum separation, a channel number, and a number of channels. The method further comprises hopping to the next frequency. | 10-14-2010 |
20100296548 | AUTOMATIC FREQUENCY HOPPING METHOD FOR USE WITH WIRELESS DEVICE - An automatic frequency hopping method is provided for use with a wireless device. The wireless device could transmit data in two or more communication frequency bands. According to the counts of successful data transmission in respective communication frequency bands, the reasons of communication failure are analyzed. According to the reasons of communication failure, the automatic frequency hopping method discriminates whether a frequency hopping procedure is performed. Since the frequency hopping procedure is performed when a proper frequency hopping condition is satisfied, the automatic frequency hopping method could achieve the power-saving purpose and avoid the wireless communication interference with other wireless devices. | 11-25-2010 |
20100316089 | FREQUENCY SELECTION METHOD TO MITIGATE IN-BAND INTERFERENCE FROM INTER-MODULATION SPUR OF THE COLLOCATED RADIO TRANSMITTER - A radio transmitter select its operating frequency based on the frequency characteristics of a collocated receiver and clock harmonics. | 12-16-2010 |
20100322287 | Method and Apparatus for Multi-Radio Coexistence - A method for multi-radio coexistence receives historical frequency usage information and historical time usage information from a first radio. The method creates a time and frequency mask by extrapolating the historical frequency and time usage information to future times and frequencies when the first radio will be active and uses the time and frequency mask to schedule a second radio to avoid receiving when the first radio will likely be active. A related apparatus has a collocated radio input for receiving timing usage information, a non-collocated radio input for receiving frequency usage information, and a time and frequency mask generator for creating a time and frequency mask using the timing usage information and the frequency usage information. The method and apparatus predicts collocated and non-collocated radio activity in both the time and frequency dimensions to reduce interference among radios operating in overlapping or adjacent frequency bands. | 12-23-2010 |
20100329310 | LOW COMPLEXITY BEAMFORMING FOR MULTIPLE ANTENNA SYSTEMS - Methods and apparatuses are disclosed that utilize the discrete Fourier transform of time domain responses to generate beamforming weights for wireless communication. In addition, in some embodiments frequency subcarriers constituting less than all of the frequency subcarriers allocated for communication to a user may utilized for generating the beamforming weights. | 12-30-2010 |
20110002361 | Signal transmission system for a measurement device - A transmission system for a measurement device on a coordinate positioning apparatus comprises a station mounted on the measuring device and another station mounted on the coordinate positioning apparatus, wherein the station and the another station communicate with each other using a spread spectrum radio link, for example, frequency hopping. The station on the probe sends a regular signal and on receiving the signal the another station on the coordinate positioning apparatus synchronises its clock and sends an acknowledgement signal. Measurement data is either sent in the regular signal or in a measurement event driven signal. | 01-06-2011 |
20110007778 | BASE STATION, USER DEVICE, AND COMMUNICATION CONTROL METHOD - Multiple reference signal transmission bandwidths are defined for system frequency bands and hierarchical reference signal bandwidths are defined for each reference signal transmission bandwidth such that a reference signal bandwidth lower than a highest-order reference signal bandwidth is a division of a higher-order reference signal bandwidth. A base station stores reference signal bandwidth information indicating the hierarchical reference signal bandwidths for each system frequency band; broadcasts the reference signal bandwidth information corresponding to a reference signal transmission bandwidth used by the base station; sets a frequency hopping bandwidth for a reference signal; reports, to a user device, the frequency hopping bandwidth and a reference signal bandwidth as assigned reference signal transmission bandwidth information; sets a reference signal transmission frequency band within the frequency hopping bandwidth based on the reference signal bandwidth information and the assigned reference signal transmission bandwidth information; and receives the reference signal from the user device. | 01-13-2011 |
20110007779 | MOBILE STATION APPARATUS, BASE STATION APPARATUS, AND COMMUNICATION CONTROL METHOD FOR RADIO COMMUNICATION SYSTEM - Frequency hopping is appropriately applied even to a communication format involving a small number of minimum hopping units in one transmission unit according to various conditions, thereby enhancing receiving performance. When frequency hopping is applied to a communication format along which transmission is performed on a per-subframe basis, the subframe including a first slot and a second slot, intra-subframe frequency hopping (Intra-FH) is not applied to first transmission according to the number of retransmission operations, and transmission data of two slots are mapped to the same frequency band. Frequency hopping (Inter/Intra-FH) including inter-subframe frequency hopping and intra-subframe frequency hopping in combination is applied solely to a retransmission symbol used for retransmission (first retransmission and subsequent retransmission), and the transmission data are mapped to different frequency bands on a per-slot basis. | 01-13-2011 |
20110026564 | Wireless communication device - The invention relates to a method for wireless communication in a wireless communication system, comprising receiving signal contributions from within a predefined frequency range, categorizing the received signal contributions in a plurality of different frequency bands being sub-bands of the predefined frequency range, comparing the content in each of the sub-bands with a predetermined criteria, selecting a sub-set of the plurality of sub-bands corresponding to the predetermined criteria, generating a frequency key comprising information as to the selected sub-set of sub-bands; and broadcasting the frequency key to a plurality of nodes of the wireless communication system. | 02-03-2011 |
20110038398 | COMMUNICATION SYSTEM, TRANSMITTER, RECEIVER AND COMMUNICATION METHOD - A transmitter communicating with a receiver, the transmitter including: a first hopping sequence generation unit which generates a hopping sequence whose hopping subcarrier interval is less than or equal to a predetermined threshold value based on a cell ID; a first reference signal pattern generation unit which generates a reference signal pattern based on a reference signal basic pattern including a predetermined known signal sequence and the hopping sequence generated by the first hopping sequence generation unit; an arrangement unit which arranges the reference signal and a data symbol in a predetermined position within the symbol, based on the reference signal pattern generated by the first reference signal pattern generation unit; and a signal transmission unit which transmits the symbol having the reference signal and the data symbol arranged by the arrangement unit to the receiver. | 02-17-2011 |
20110044377 | RADIO COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD - A clipping rate is controlled in spectrum shaping according to a propagation path to thereby improve transmission characteristics and perform communication at a stable transmission rate. | 02-24-2011 |
20110064116 | SPREADING DEVICE AND DESPREADING DEVICE FOR RADIO COMMUNICATIONS IN THE PRESENCE OF AN OFF-AXIS POWER SPECTRAL DENSITY CONSTRAINT - A device (D | 03-17-2011 |
20110075704 | Methods and Systems for Distributing Broadcast Messages on Various Networks - Methods and systems for sending a broadcast message in frequency hopping and other systems. Instead of sending a complete message separately to each device, a relatively small packet or “chirp” is sent. These chirps are either targeted at known devices or sent in a manner to sweep the RF band. Devices that hear the chirps get information about the channel and/or time that the broadcast data will be sent. These devices then listen for the broadcast data as instructed, e.g., at the specified time on the specified channel. A system may alternatively, or in addition, use a scheduled hopping sequence break as a broadcast moment. Such a broadcast moment can be scheduled to periodically interrupt the node hopping sequences so that, at such times, many or all nodes are scheduled to be on the same channel for potential broadcasts. | 03-31-2011 |
20110080935 | Channel Hopping Based Content Protection Having An Out-Of-Band Communication Band - One feature provides a method for transmitting content to a receiving device, by establishing channel hopping sequence information with the receiving device via a first communication band. The channel hopping sequence information is associated with a plurality of traffic channels within a second communication band. Moreover, the method entails transmitting the content to the receiving device through the plurality of traffic channels via the second communication band using a channel hopping scheme implemented according to the channel hopping sequence information. In one embodiment, establishing the channel hopping sequence information with the receiving device via the first communication band further includes: obtaining a channel hopping sequence key; and transmitting the channel hopping sequence key to the receiving device within the first communication band. | 04-07-2011 |
20110103428 | METHOD AND DEVICE FOR INTELLIGENT FREQUENCY HOPPING IN A SHARED FREQUENCY BAND - A non-Bluetooth device operates in a same frequency band as Bluetooth devices by employing a method of intelligent frequency hopping. The method includes: scanning a frequency band for frequency hopping communications in the frequency band by one or more Bluetooth communication devices communicating according to a Bluetooth communication protocol; determining a first frequency hopping sequence utilized by the one or more Bluetooth communication devices according to the Bluetooth communication protocol; determining a second frequency hopping sequence within the frequency band to avoid interference from the frequency hopping communications by the one or more Bluetooth communication devices; and establishing a wireless communication connection between two non-Bluetooth devices, the wireless communication connection operating in the frequency band according to a second wireless communication protocol different than the Bluetooth communication protocol, and using the second frequency hopping sequence. | 05-05-2011 |
20110142095 | METHOD AND APPARATUS FOR PERIODIC SOUNDING REFERENCE SIGNAL TRANSMISSION FROM MULTIPLE ANTENNAS IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting sounding reference signals from a user equipment having multiple antennas is disclosed. The user equipment may concurrently send two periodic sounding reference signals. A first sounding reference signal is sent from a single antenna. A second sounding reference signal is sent from multiple antennas. Transmission of the sounding reference signal from multiple antennas is triggered when the user equipment receives activation signal from the network. | 06-16-2011 |
20110142096 | CHIME-IN PROTOCOL FOR CHANNEL ACCESS - A network of stations uses bandwidth assigned to primary users on a secondary user basis. The stations having a status of needing to send information indicate a need for transmission access by transmitting, simultaneously with transmissions indicating a need for transmission access from other stations of the network, an indication of status to a master station. Each station indicating need for transmission access transmits that indication of status on a respectively different frequency. The master station then grants access to the transmission bandwidth to the requesting stations. | 06-16-2011 |
20110150042 | DATA TRANSMISSION METHOD, NETWORK DEVICE, AND COMMUNICATION SYSTEM - A data transmission method, a network device, and a communication system are provided. The method includes: acquiring a frequency hopping time period and frequency hopping information when reliable transmission is required; transmitting data according to the frequency hopping information in the frequency hopping time period. Thus, the reliability of data transmission is ensured, the original network is not changed significantly, and the system overhead and resources are saved. | 06-23-2011 |
20110164659 | CLOSED-LOOP TRANSMISSION POWER CONTROL METHOD, BASE STATION APPARATUS AND TERMINAL - In a closed-loop TPC for a channel using a wireless resource, to which frequency hopping is applied, a high quality reception is achieved for all RBs without applying another technique to each RB. This transmission power control method, in a mobile communications system that transmits signals by frequency hopping in a plurality of resource blocks, includes a transmission power control method that transmission-power controls a channel in a closed loop using a wireless resource to which frequency hopping is applied, measures a reception channel quality of received signals for each resource block (RB | 07-07-2011 |
20110194586 | WIRELESS COMMUNICATIONS APPARATUS - MIMO UWB Communications apparatus is configured to send out a channel estimation sequence comprising a plurality of sequentially transmitted symbols in accordance with a first band hopping sequence, sent from one antenna of the apparatus, while another antenna is transmitting another sequence of channel estimation symbols in accordance with another, complementary band hopping sequence. A legacy device will be capable of synchronising with the channel estimation symbols sent in accordance with the first band hopping sequence, while a MIMO receiver will be able to determine channel estimates for all MIMO channels on the basis of the combined channel estimation transmissions. | 08-11-2011 |
20110235683 | ANTENNA SYSTEMS WITH COMMON OVERHEAD FOR CDMA BASE STATIONS - Systems and methods for use in CDMA antenna systems are provided in which signals each having a common overhead component are transmitted on a set of adjacent beams of a sector with a micro-timing offset between signals transmitted on adjacent pairs of beams which is large enough that destructive cancellation substantially does not occur between the pair of beams. | 09-29-2011 |
20110243190 | MOBILE TERMINAL APPARATUS, BASE STATION APPARATUS AND METHOD FOR TRANSMITTING SHARED CHANNEL SIGNAL - In order to improve the reception quality of a shared channel signal transmitted on uplink or downlink, the present invention provides a mobile terminal apparatus that transmits a shared channel signal on uplink by using a predetermined number of basic frequency blocks out of a plurality of basic frequency blocks divided from a system band, each of the basic frequency blocks having a predetermined bandwidth. When receiving, on downlink, control information for frequency hopping of the shared channel signal over different basic frequency blocks, the mobile terminal apparatus maps the shared channel signal in sub-carriers in the different basic frequency blocks in such a manner that frequency hopping is performed over the basic frequency blocks in accordance with the control information, and radio-transmits a transmission signal after mapping to a base station apparatus. | 10-06-2011 |
20110243191 | WIRELESS COMMUNICATION TERMINAL APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS AND SIGNAL SPREADING METHOD - A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit ( | 10-06-2011 |
20110255570 | ADAPTIVE FREQUENCY HOPPING IN TIME-SLOTTED BASED WIRELESS NETWORK - In a wireless network system, the nodes share a frequency hopping pattern. A method comprises providing a channel list table which includes, for each transmitting node, one or more channel lists, each channel list containing conditions of the channels of the shared frequency hopping pattern that include at least one available channel for communications with a target node; selecting a channel of a next allocated time slot from the shared frequency hopping pattern at the transmitting node; selecting the channel list for the target node from the channel list table, to which the transmitting node transmits; checking if the selected channel is available based on the selected channel list; setting the selected channel at the transmitting node if the selected channel is available; and calculating a substitute channel from the channel list if the selected channel is not available. | 10-20-2011 |
20110280282 | METHOD AND APPARATUS FOR OPTIMIZING OUTPUT POWER LEVELS IN POWER AMPLIFIERS - Some embodiments discussed relate to an apparatus comprising a power amplifier module. The power amplifier module includes a plurality of sensors, and a first digital communication port configured to provide a monitor signal from at least one of the plurality of sensors. The apparatus includes a transceiver module coupled to provide an signal to an input of the power amplifier the transceiver module including a second digital communication port configured to receive the monitor signal from the first digital communication port, a processing unit configured to generate at least one of a bias control signal and a back-off signal dependent upon the monitor signal, and a power controller to receive the at least one of bias control signal and the back-off signal and provide at least one further input signal to the power amplifier based on at least one of the bias control signal and the back-off signal. | 11-17-2011 |
20110310931 | Antenna Selection with Frequency-Hopped Sounding Reference Signals - The embodiments of the invention provide a method for selecting antennas for date transmission in a wireless communication network including user equipment (UE). The network is assigned a band of frequencies, wherein the band is partitioned into at least one set of subbands of the band according to a sounding reference signal (SRS) band-width configuration in a form of a code-tree having a plurality levels and each level is associated with a partition coefficient. The UE is configured to transmit frequency-hopped SRS on the set of sub-bands using subsets of the set of antennas. First, the method determines if a number of subbands in the set of the sub-bands is odd or even based on the SRS bandwidth configuration, and selects a particular subset of the antennas according to whether the number is odd or even. Then, the SRS is transmitted from the particular subset of the antennas. | 12-22-2011 |
20120002703 | WIRELESS TRANSMISSION METHOD, WIRELESS TRANSMISSION SYSTEM, AND TRANSMISSION APPARATUS AND RECEPTION APPARATUS OF WIRELESS TRANSMISSION SYSTEM - In a wireless transmission system that transmits and receives a modulated signal between a transmitter and a receiver that are coupled through a wireless transmission path, the transmitter includes a spectrum division filter bank dividing the modulated signal and generating a plurality of sub-spectrum signals each of which is arranged at a predetermined frequency position, and subjects the plurality of sub-spectrum signals arranged in spectra to a direct spectrum division transmission, and the receiver includes a spectrum combination filter bank extracting the plurality of sub-spectrum signals from the received signals arranged in spectra and subjected to the direct spectrum division transmission to combine the sub-spectrum signals into an original modulated signal. | 01-05-2012 |
20120020387 | Frequency hopping - A cellular communications system includes a base station and a plurality of user devices, wherein each user device is operable to communicate with the base station over a communication channel having a plurality of frequency resources, wherein the base station is operable: i) to provide each user device with a respective initial allocation of the frequency resources; and ii) to provide at least one user device with a periodic communications opportunity in which the user device can communicate with the base station, wherein each user device is operable to apply a frequency shift to its initially allocated frequency resource in accordance with a frequency hopping sequence, wherein the user devices use the same frequency hopping sequence and are synchronized with each other so that, at any point in time, a common frequency shift is applied by the user devices. | 01-26-2012 |
20120099620 | CLEAR-CHANNEL SYSTEM AND RELATED APPLICATIONS - A wireless spread-spectrum communication system for transmitting data includes a plurality of end point transmitters and at least one receiver. The end point transmitters transmit data via a frequency-hopped spread-spectrum signal where the transmitting signal is sent without the benefit of frequency stabilization. The receiver is responsive to the frequency-hopping spread-spectrum signals and includes a correlator and a signal processor. The correlator samples at least a first portion of a preamble of the signal and correlates the portion of the preamble with a known preamble pattern to determine a probability of correlation. The signal processor applies a Fast Fourier Transform algorithm to the signal in response to the probability of correlation to track a narrowband frequency of the signal based on at least a second portion of the preamble and to decode data encoded within the signal subsequent to the preamble. | 04-26-2012 |
20120128034 | Infrared, CDMA and OFDM Signal Transmission Methods - Methods for, processing, modulating and transmitting one or more signals, in a mobile unit, used in an infrared (IR) system, in a cellular system and in a Wi-Fi wireless network. Receiving, demodulating and processing a modulated signal for generating a position finder signal, including Global Positioning System (GPS) signal. Method for generating and processing cross-correlated, TDMA, CDMA and OFDM signals. Selection of TDMA, CDMA and OFDM signals and transmission of TDMA, CDMA, OFDM or IR signal. Processing methods for providing cross-correlated spread spectrum, or cross-correlated Orthogonal Frequency Division Multiplex (OFDM) baseband signals to quadrature modulators for modulation and transmission. Method for multiple input multiple output (MIMO)transmission-reception. Method for processing touch-screen generated signals into touch screen generated control signals for control of selection of transmission of one or more of TDMA or CDMA or OFDM or IR signal. | 05-24-2012 |
20120134390 | CO-EXISTENCE OF NARROW-CHANNEL TRANSMITTER AND WIDE-CHANNEL RECEIVER - A narrow-channel transmitter in a dual-radio communication device reduces its bandwidth for the benefit of a wide-channel receiver in the dual-radio communication device. Narrow channels are marked as unavailable based on actual off-line adjacent channel rejection ‘ACR’ information that characterizes tolerance of the wide-channel receiver to adjacent channel interference ‘ACI’ caused by transmissions from the narrow-channel transmitter. | 05-31-2012 |
20120140794 | Automatic Gain Control for Frequency-Hopped OFDM - An automatic gain control method and system for use in signal processing of OFDM symbols at a receiver. Two stages of coarse and fine automatic gain control are implemented that adjust different gains in an analog RF processing stage of the receiver. Gain of a low noise amplifier and a mixer are adjusted during a first and coarse automatic gain control stage based on feedback from a digital baseband stage. During a subsequent fine gain control period, the gain of a programmable gain amplifier is adjusted separately for each frequency band used by the OFDM symbols based on a histogram bin that counts the number of output samples of an analog to digital converter whose magnitude falls within certain ranges. Coarse and fine gains are updated after each OFDM symbol. | 06-07-2012 |
20120155511 | Dynamic Assignment of Frequency Hopping Sequences in a Communication Network - In one embodiment, a management device determines a topology of nodes in a network. Based on the topology, frequency hopping sequences are assigned (and notified) to the nodes such that each particular node of a certain set of the nodes is assigned a frequency hopping sequence on which to transmit that is different than frequency hopping sequences of neighbors and hidden neighbors of that particular node. In another embodiment, a transmitting node first transmits a transmission indication signal on its particular frequency band based on its frequency hopping sequence, and then transmits a message on the particular frequency band. In a further embodiment, a receiving node listening to a plurality of frequency bands may detect the transmission indication signal on the particular frequency band. In response, the receiving node filters out all frequency bands other than the particular frequency band, and receives the following transmission on that particular frequency band. | 06-21-2012 |
20120207191 | WIRELESS COMMUNICATION DEVICE - A wireless communication device including an integrated processing circuit and a first memory is provided. The integrated processing circuit includes a processing unit capable of processing a wireless communication signal and a radio frequency (RF) unit capable of performing a conversion between a radio frequency (RF) signal and a baseband signal, wherein the wireless communication signal is one of the RF signal and the baseband signal. The first memory is coupled to the integrated processing circuit. The first memory is capable of storing data used by the processing unit, wherein the integrated processing circuit and the first memory are packaged in a single semiconductor package. | 08-16-2012 |
20120224607 | METHOD AND NETWORK SIDE DEVICE FOR TRUNKING COMMUNICATION - A method and a network side device for trunking communication are provided, and the method includes: in the frequency hopping synchronization of the trunking communication, sending a frequency hopping synchronization information frame to a mobile terminal intended to communication, wherein the frequency hopping synchronization information frame includes the frequency hopping synchronization information. The amount of the transmitted synchronization information is large, the time for establishing synchronization is short, and the confidentiality is strong; and the technical difficulty of the implementation is not high. | 09-06-2012 |
20120230370 | Efficient Transmission of Large Messages in Wireless Networks - In one embodiment, a sender in a frequency hopping wireless network classifies a message as a large message to be fragmented into a plurality of packets for transmission to a receiver, and in response, indicates to the receiver that the message is a large message to request use of an orthogonal frequency hopping sequence between the sender and receiver for the duration of the large message transmission, the orthogonal frequency hopping sequence orthogonal to a shared frequency hopping sequence of the wireless network. Thereafter, the sender transmits the large message to the receiver on the orthogonal frequency hopping sequence, and returns to the shared frequency hopping sequence upon completion. In another embodiment, the receiver receives the indication that a message is a large message (requesting use of the orthogonal frequency hopping sequence). If the receiver can comply, the large message is received on the orthogonal frequency hopping sequence. | 09-13-2012 |
20120236906 | APPARATUS AND METHOD FOR FREQUENCY SHIFTING OF A WIRELESS SIGNAL AND SYSTEMS USING FREQUENCY SHIFTING - Coverage for a wireless network is improved using a frequency shifting scheme. A wireless signal in a frequency band is shifted to another band, and carried in the shifted band to another location where the signal is shifted back to the original frequency band. The frequency shifting may utilize frequency shifting schemes such as mixer/filter and heterodyne. The wireless signal can be frequency shifted by converting it to other representing signals (such as I/Q components) and forming the frequency-shifted signal from the representations. The transmission medium may use dedicated wiring or existing service wiring in a residence or building, including LAN, telephone, AC power and CATV wiring. The system may be enclosed as a stand-alone unit, housed in integrated form as part of a service outlet or as a snap-on/plug-in module. | 09-20-2012 |
20120243575 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - According to an embodiment, a wireless communication apparatus includes a communication control unit, a transmitting unit and a receiving unit. The communication control unit selects one frequency channel from a plurality of frequency channels and switches the frequency channel to be selected. The receiving unit is configured to receive a reception signal of the selected frequency channel from another wireless communication apparatus. The receiving unit includes an interference wave detection circuit configured to detect an interference wave signal of a detection frequency. The interference wave signal is included in an input signal received during an interference wave detection period. In the interference wave detection period, the reception signal is not received. The communication control unit masks a frequency channel related to the detection frequency among the plurality of frequency channels to create a frequency channel map. The communication control unit does not select the masked frequency channel. | 09-27-2012 |
20120275490 | MULTI-PATH RADIO TRANSMISSION INPUT/OUTPUT DEVICES, NETWORK, SYSTEMS AND METHODS WITH ON DEMAND, PRIORITIZED ROUTING PROTOCOL - Devices, networks, systems and methods for coordinating communications on multi-path radio transmission mesh networks include delaying replies to route requests based on available path metrics to ensure the best available connection routes through the network can be understood and utilized. | 11-01-2012 |
20120300810 | CHIRP COMMUNICATIONS - A method of communicating a chirp signal from a transmitter suitable for receipt at a proximal receiver and a distal receiver, the chirp signal including a plurality of packets, each packet including at least one symbol, each symbol including one or more identical chirps, the method including: generating the chirp signal by interleaving constituent packets of: (i) a first set of packets encoded with first data, each packet including one or more symbols having a first time period t | 11-29-2012 |
20120300811 | ZERO DELAY FREQUENCY SWITCHING WITH DYNAMIC FREQUENCY HOPPING FOR COGNITIVE RADIO BASED DYNAMIC SPECTRUM ACCESS NETWORK SYSTEMS - This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and in particular to a method of addressing zero-delay frequency switching for cognitive dynamic frequency hopping. The method combines regular (periodic) channel maintenance with dynamic frequency hopping over a cluster of vacated channels that are initially setup such that the switching delays for channel setup and channel availability check are eliminated. | 11-29-2012 |
20120320948 | MULTI-CARRIER PEAK POWER REDUCTION IN FREQUENCY HOPPING SYSTEMS - Peak power reduction in transmit chains of frequency hopping, multi-band radiocommunication devices is performed. Filtering and, optionally, interpolation of a signal being processed for peak power reduction can be performed only in an error signal path or in both an error signal path and a primary signal path. Alternatively, a sufficiently high sample rate can be used in support of error signal generation. | 12-20-2012 |
20120320949 | System, Apparatus and Method for Managing Message Communications in Systems Employing Frequency Hopping - Systems, apparatuses and methods for managing message communications in systems employing frequency hopping. One method according to the invention involves transmitting a message via a frequency of a frequency hopping sequence, and determining when the same frequency will reoccur in the frequency hopping sequence. Relevant portions of the device enter a sleep mode, and the device emerges from the sleep mode when the frequency at which the message was transmitted reoccurs in the frequency hopping sequence. The device monitors for a response to the message via the frequency at which the message was transmitted when the frequency reoccurs in the frequency hopping sequence. | 12-20-2012 |
20130010830 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A BT apparatus unit configured to perform Bluetooth (registered trademark) communication, a WLAN apparatus unit configured to perform WLAN communication, and an information managing unit configured to acquire a WLAN communication frequency band, which is a frequency band used for the WLAN communication, from the WLAN apparatus unit, determine an unusable frequency band based on the acquired WLAN communication frequency band, and notify the BT apparatus unit of the determined unusable frequency band. The BT apparatus unit performs frequency hopping using a frequency band excluding the unusable frequency band. | 01-10-2013 |
20130010831 | Wireless Communications Apparatus - MIMO UWB Communications apparatus is configured to send out a channel estimation sequence comprising a plurality of sequentially transmitted symbols in accordance with a first band hopping sequence, sent from one antenna of the apparatus, while another antenna is transmitting another sequence of channel estimation symbols in accordance with another, complementary band hopping sequence. A legacy device will be capable of synchronising with the channel estimation symbols sent in accordance with the first band hopping sequence, while a MIMO receiver will be able to determine channel estimates for all MIMO channels on the basis of the combined channel estimation transmissions. | 01-10-2013 |
20130028294 | ADAPTIVE PILOT STRUCTURE TO ASSIST CHANNEL ESTIMATION IN SPREAD SPECTRUM SYSTEMS - The present invention relates generally to methods for generating a dynamic pilot symbol structure in spread spectrum communication systems, and in particular to the use of pilot symbols by user equipment in channel estimation. In one form, the method includes, allocating basic pilot symbols at the beginning of each data chunk and spread over the plurality of sub-carrier frequencies; and selectively replacing data symbols in each data chunk with adaptive pilot symbols according to the speed of the user equipment. | 01-31-2013 |
20130094536 | EFFICIENT NETWORK DISCOVERY IN FREQUENCY HOPPING NETWORKS - In one embodiment, a device in a frequency hopping communication network transmits responsive beacon messages based on adaptive types of responsive beacon message transmission based on a number of received beacon requests within a given time period: the number below a threshold results in synchronized unicast messages; the number above the threshold results in unsynchronized broadcast messages. In another embodiment, the device suppresses unsolicited beacon message transmission based on a density-aware redundancy count of other unsolicited beacon message transmissions from neighboring devices. In another embodiment, the device may transmit unsolicited beacon messages according to an adaptive interval based on stability of the network. In another embodiment, the device may suppress transmission of a beacon request to join the communication network based on a density-aware redundancy count of other beacon requests from neighboring devices, and transmits beacon requests at an adaptive interval that increases in response to each unanswered beacon request. | 04-18-2013 |
20130107909 | MULTI-PATH RADIO TRANSMISSION INPUT/OUTPUT DEVICES, NETWORK, SYSTEMS AND METHODS WITH LINK SUITABILITY DETERMINATION | 05-02-2013 |
20130163640 | RFID READERS CO-EXISTING WITH OTHER ISM-BAND DEVICES - Radio Frequency IDentification (RFID) reader system, software, and methods are provided, such that an operational processing block for the RFID reader to communicate with an RFID tag uses a RF spectrum portion subdivided into a set of channels. The communication takes place in the presence of a foreign device that uses a subset of first channels of the RF spectrum and does not use a subset of second channels of the spectrum. The methods cause a radiating power directed towards the tag to be reduced and a radiating dwell time to be changed. This is to assure that co-existing systems can operate without compromising their functionality and operational quality. In some embodiments, the radiating power is reduced to zero. | 06-27-2013 |
20130170522 | Method for Securing Communications Using an Initialization Vector the Time Not Being Known - A method for securing communications in a network comprising at least one emitter terminal A and one receiver terminal B, comprises in combination at least the following steps: defining a measurable quantity that can be measured at the emitter A and the receiver B; normalizing and quantifying said defined quantity; initializing an initialization vector with said normalized and quantified quantity; using said initialization vector with a cryptographic key to randomly generate a set of consecutive frequencies to use for securing said communications between the emitter A and the receiver B; and incrementing the initialization vector by a given value after each pseudo-random generation time interval Itpa in order to generate a set of consecutive frequency values. | 07-04-2013 |
20130202013 | METHOD TO BOOTSTRAP INTO A FREQUENCY AGILE AD HOC NETWORK OF RADIOS THAT USE A NON-DETERMINISTIC FREQUENCY PATTERN - A method to facilitate late entry of a late entrant node into an ad-hoc radio network involves accessing from a memory at the late entrant node an initial frequency hopping sequence for the ad-hoc radio network. The late entrant node uses at least the initial frequency hopping sequence to determine a first frequency to monitor during a communication epoch corresponding to one of the frequency hops. The late entrant node thereafter monitors the first frequency to detect the presence of a beacon signal transmitted by a participating node of the network. Subsequently, the late entrant node determines a second frequency included in the current hopping sequence of the network based on information contained in the beacon signal. | 08-08-2013 |
20130215932 | SCALABLE PACKETS IN A FREQUENCY HOPPING SPREAD SPECTRUM (FHSS) SYSTEM - A wireless mesh network, method, and processor-readable storage medium for operating a network are disclosed. In particular, methods are disclosed for operating a wireless mesh network to increase the number of frequency channels used by the system without needing to increase the preamble length. According to various embodiments, a wireless mesh network divides the ISM spectrum into two types of channels: acquisition channels and data channels. An acquisition channel is used to transmit a preamble of a communication packet. One or more data channels are used to transmit a data portion of the communication packet. | 08-22-2013 |
20130243038 | SCALABLE PROTOCOL FOR LARGE WSNS HAVING LOW DUTY CYCLE END NODES - A method and system are described for providing a wireless sensor network between a main node and a plurality of nodes, the nodes associated with sensors. The method and system define communications channels over which the main node communicates with the nodes based on a channel hopping scheme, and define at least one transfer channel that is dedicated to carrying transfer frames that are broadcast by the main node. The method and system configure non-acquired nodes that are not acquired to the network to enter a connection session by locating the at least one transfer channel to listen for a transfer message. The transfer message indicates a next communications channel that will become active. The method switches the non-acquired nodes to the next communications channel. | 09-19-2013 |
20130279540 | ON-DEMAND PAIR-WISE FREQUENCY-HOPPING SYNCHRONIZATION - In one embodiment, a device receives and stores a broadcast schedule, and may determine whether a neighbor unicast listening schedule is available for a neighboring device. If so, the device may transmit a data frame to the neighboring device pursuant to the neighbor unicast listening schedule. If a neighbor unicast listening schedule is not available, the device may transmit the data frame to the neighboring device pursuant to a broadcast schedule. Once the data frame is received by the neighboring device, pursuant to the neighbor unicast listening schedule or the broadcast schedule, an acknowledgement may be received from the neighboring device, which may include an updated neighbor unicast listening schedule for that neighboring device. | 10-24-2013 |
20130308685 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, AND FREQUENCY ALLOCATION METHOD - A composite wireless device including a WLAN device and a BT device. The composite wireless device includes a wireless-channel control unit that determines usable FH channels that can be used for frequency hopping of the BT device, based on communication quality information of the WLAN channel, and notifies the BT device of the usable frequency bands, and a BT-communication control unit that acquires communication quality information of an extended frequency band, which is a frequency band other than the usable frequency bands, as extended communication quality information. The wireless-channel control unit adds the FH channels in the WLAN channel, which are determined as being unused based on the extended communication quality information, as the usable FH channels. | 11-21-2013 |
20130322493 | USER EQUIPMENT, RADIO BASE STATION AND METHODS THEREIN FOR TRANSMITTING INFORMATION OF AN ALLOCATION OF A RADIO RESOURCE - Embodiments herein relate to a method in a radio base station for transmitting information of an allocation of a radio resource allocated to a second user equipment. The radio base station is arranged to serve a first user equipment and the second user equipment in a cell of a radio communications network. The radio resource in the cell comprises Physical Resource Blocks that are organized in radio frames comprising subframes. The radio base station allocates a radio resource to the second user equipment in a subframe of the cell based on a frequency hopping scheme of the first user equipment. Also, the radio base station transmits a message to the second user equipment, which message indicates the allocated radio resource. | 12-05-2013 |
20130329768 | BLUETOOTH-ENABLED INTELLIGENT ELECTRONIC DEVICE - An intelligent electronic device (IED), e.g., an electrical power meter, having wireless communication capabilities, e.g., Bluetooth connectivity, for transmitting and receiving data without a hardwire connection is provided. A system and method for retrieving revenue metering data from at least one IED, e.g., a revenue meter, are also provided. The system includes at least one intelligent electronic device including a transceiver configured for receiving calculated energy consumption data from a processor and transmitting the calculated energy consumption data via a spread-spectrum frequency hopping technique; and a data collection device configured for receiving the calculated energy consumption data from the at least one intelligent electronic device in response to supplying a pairing passkey to the intelligent electronic device. | 12-12-2013 |
20130343430 | METHODS AND SYSTEMS FOR DISTRIBUTING BROADCAST MESSAGES ON VARIOUS NETWORKS - Methods and systems for sending a broadcast message in frequency hopping and other systems. Instead of sending a complete message separately to each device, a relatively small packet or “chirp” is sent. These chirps are either targeted at known devices or sent in a manner to sweep the RF band. Devices that hear the chirps get information about the channel and/or time that the broadcast data will be sent. These devices then listen for the broadcast data as instructed, e.g., at the specified time on the specified channel. A system may alternatively, or in addition, use a scheduled hopping sequence break as a broadcast moment. Such a broadcast moment can be scheduled to periodically interrupt the node hopping sequences so that, at such times, many or all nodes are scheduled to be on the same channel for potential broadcasts. | 12-26-2013 |
20140036961 | FREQUENCY HOPPING - A communications node operable to communicate with another communications node over a communications channel having a plurality of frequency resources, the communications node includes data defining a division of the communications channel into S contiguous sub-bands each having N frequency resources, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information with the other communications node, the frequency shift corresponding to an integer multiple of the number N frequency resources in each sub-band, the integer multiple being an integer from the range zero to S, and a transceiver for communicating information with the other communications node using the determined frequency resource. | 02-06-2014 |
20140044150 | SYSTEM AND METHOD FOR INTERFERENCE TRIGGERED FREQUENCY HOPPING - Systems and methods of interference-triggered frequency hopping in a wireless communication system. A master is provided in the wireless communication system in wireless communication with slave nodes each configured to use different preselected communication frequencies to permit frequency hopping. A current channel is selected from among multiple channels in the wireless communication system in which the master and at least some of the slave nodes send and receive wireless communications. Each of the channels uses different ones of the preselected communication frequencies. In the current channel, interference with communications between the master and a selected one of the slave nodes that use the current channel is detected. A new channel is selected only in response to detecting the interference. The system switches from the current channel to the new channel such that communications between the master and the selected slave node use the new channel. | 02-13-2014 |
20140044151 | SYSTEM AND METHOD FOR INTERFERENCE TRIGGERED FREQUENCY HOPPING - Systems and methods of interference-triggered frequency hopping in a wireless communication system. A master is provided in the wireless communication system in wireless communication with slave nodes each configured to use different preselected communication frequencies to permit frequency hopping. A current channel is selected from among multiple channels in the wireless communication system in which the master and at least some of the slave nodes send and receive wireless communications. Each of the channels uses different ones of the preselected communication frequencies. In the current channel, interference with communications between the master and a selected one of the slave nodes that use the current channel is detected. A new channel is selected only in response to detecting the interference. The system switches from the current channel to the new channel such that communications between the master and the selected slave node use the new channel. | 02-13-2014 |
20140044152 | COMMUNICATION APPARATUS AND METHOD - A communication apparatus and method for operating a communication apparatus are provided. The communication apparatus is configured to determine whether a sub-frequency band causing interference is present among sub-frequency bands included in a reception frequency band group, and to send to another communication apparatus an interference avoidance request signal which requests the other communication apparatus to transmit signals by use of remaining sub-frequency bands except the sub-frequency band causing interference, leading to simpler and more efficient interference avoidance. | 02-13-2014 |
20140092941 | PROCESSOR FOR A RADIO CIRCUIT - A processor for a radio circuit is disclosed. The processor includes a full spectrum receiver and a white space classifier. The full spectrum receiver is configured to receive an analogue radio signal comprising multiple channels within a frequency band and transform the analogue radio signal to a digital radio signal. The full spectrum receiver is also configured to transform the digital radio signal from a time domain signal to a frequency domain signal. The white space classifier is configured to identify an unused channel within the frequency band using the frequency domain signal derived from the analogue radio signal. | 04-03-2014 |
20140112373 | METHOD AND APPARATUS FOR FREQUENCY ASSIGNMENT IN A FREQUENCY HOPPING MODE OF A WIRELESS COMMUNICATION SYSTEM - A frequency allocation method and apparatus using a mirroring-assisted frequency hopping pattern is provided for retransmission in a wireless communication system operating in a frequency hopping mode. A frequency mapping method for a wireless communication system operating in a frequency hopping mode includes determining whether or not mirroring is used in accordance with a number of packet transmissions; mapping a frequency resource for a packet transmission based on a result of the determination; and receiving a packet using the mapped frequency resource. | 04-24-2014 |
20140119407 | APPARATUS AND METHOD FOR EXTENDING BLUETOOTH DEVICE RANGE - An apparatus for extending Bluetooth device range includes a Bluetooth range extender device implementing at least two Bluetooth communication profiles such that the Bluetooth range extender device implements a first role to a first standard Bluetooth communication device and implements a second role to a second standard Bluetooth communication device. | 05-01-2014 |
20140119408 | SYNCHRONOUS ACCESS METHOD, AND COMMUNICATION DEVICE AND SYSTEM IN FREQUENCY HOPPING RADIO COMMUNICATION - A method performs synchronous access between a first communication device and a second communication device. The first communication device adopts N frequency hopping channels and performs frequency hopping in a predetermined frequency hopping sequence and at a predetermined frequency hopping time interval. The first communication device sends a broadcast beacon over the N frequency hopping channels with a cycle of M times the predetermined frequency hopping time interval. The broadcast beacon carries general information including synchronization information. M and N are both natural numbers. The second communication device receives the broadcast beacon over any one frequency hopping channel of the N frequency hopping channels to acquire the synchronization information. The second communication device exchanges information with the first communication device for access. This flexible, simple and easy-to-implement synchronous access solution achieves high-efficiency utilization and good anti-interference of a bandwidth, and allows rapid and reliable synchronization with low power consumption. | 05-01-2014 |
20140133520 | NETWORK MANAGEMENT SYSTEM FOR FREQUENCY HOPPED TACTICAL RADIOS - The present invention uses pseudorandom sequence to develop a strategy for the parallel communication of frequency hopped tactical radios. For this purpose, both time division multiplexing and frequency division multiplexing are used. | 05-15-2014 |
20140153614 | WIRELESS COMMUNICATIONS APPARATUS - MIMO UWB Communications apparatus is configured to send out a channel estimation sequence comprising a plurality of sequentially transmitted symbols in accordance with a first band hopping sequence, sent from one antenna of the apparatus, while another antenna is transmitting another sequence of channel estimation symbols in accordance with another, complementary band hopping sequence. A legacy device will be capable of synchronising with the channel estimation symbols sent in accordance with the first band hopping sequence, while a MIMO receiver will be able to determine channel estimates for all MIMO channels on the basis of the combined channel estimation transmissions. | 06-05-2014 |
20140177678 | CHANNEL DIVISION - A communication device that forms part of a network comprising a plurality of cells, each comprising a communication device configured to communicate with at least one terminal via a frequency hopping sequence associated with its respective cell, the communication device being configured to, responsive to a determination that there are an insufficient number of frequencies available to provide frequency hopping sequences for it and the communication devices in its neighbouring cells that are sufficiently distinct from each other, share the insufficient number of frequencies with of those communication devices on a time division basis. | 06-26-2014 |
20140204978 | TELEMETRY MULTIPLE ACCESS PROTOCOL OF A BEACON - Systems, methods and apparatus are provided through which in some implementations a here-i-am (HIA) transmission on a first RF channel, a registration (REG) transmission on a second RF channel and a short-and-instant telemetry messaging (SIM) transmission on a third RF channel is operable to exchange data between a network and beacons using a wireless communications channel that permits the beacons to access the network for identification of the beacons. | 07-24-2014 |
20140204979 | TELEMETRY MULTIPLE ACCESS PROTOCOL OF A BASE STATION - Systems, methods and apparatus are provided through which in some implementations a here-i-am (HIA) transmission on a first RF channel, a registration (REG) transmission on a second RF channel and a short-and-instant telemetry messaging (SIM) transmission on a third RF channel is operable to exchange data between a network and beacons using a wireless communications channel that permits the beacons to access the network for identification of the beacons. | 07-24-2014 |
20140254634 | SYSTEMS AND METHODS FOR REDUCING INTERFERENCE BETWEEN A PLURALITY OF WIRELESS COMMUNICATIONS MODULES - A wireless communications includes a first wireless communications and a second wireless communications. The first wireless communications module transmits or receives a first wireless signal in a first frequency band selected from a first frequency range. The second wireless communications module transmits or receives a second wireless signal in a second frequency band selected from a second frequency range, and adjusts a transmission power of the second wireless signal in response to that a frequency offset between the first frequency band and the second frequency band falls within a predetermined range. The first wireless communications module is further configured to determine an in-band range in the overlapping part of the first and second frequency ranges, and a transmission power of the second wireless signal is adjusted in response to a frequency offset between the first frequency band and the second frequency band. | 09-11-2014 |
20140269841 | Ultra-Wideband Frequency Position Modulation using Nonlinear Compressed Sensing - A Frequency Position Modulation system for encoding signals for transmission. A signal's discrete frequency support is used to represent symbols. The signal can be non-uniformly spread over many GHz of instantaneous bandwidth, resulting in a communications system that is resilient to interference and difficult to intercept. The FPM symbols are recovered using adaptive projections that use an analog polynomial nonlinearity paired with an analog-to-digital converter that is sampling at a rate at that is only a fraction of the instantaneous bandwidth of the signal. In the presence of partial band interference, nonlinearities generated by the transmitter of are exploited by the receiver to help unambiguously recover tones that could otherwise be lost. The nonlinearities are generated by driving the power amplifier of the transmitter into saturation to induce distortions at a desired level. | 09-18-2014 |
20140321509 | INTERFERENCE MITIGATION - A communication device for communicating with a plurality of terminals using a frequency hopping sequence, the communication device being configured to determine that one of the plurality of terminals is subject to interference on a frequency in the frequency hopping sequence and to, in response to that determination, schedule communication with that terminal to avoid that frequency. | 10-30-2014 |
20140328375 | MULTICARRIER COMMUNICATION SYSTEM EMPLOYING EXPLICIT FREQUENCY HOPPING - Variable bandwidth assignment and frequency hopping are employed to make efficient use of radio resources. Variable bandwidth assignment is achieved by dynamically allocating different numbers of subcarriers to different mobile terminals depending on their instantaneous channel conditions. The frequency hopping patterns are determined “on-the-fly” based on the current bandwidth assignments. The bandwidth assignments and frequency hopping patterns are signaled to the mobile terminals in a scheduling grant. | 11-06-2014 |
20150043617 | Approach For Managing The Use Of Communications Channels Based On Performance - An approach for selecting sets of communications channels involves determining the performance of communications channels. A set of channels is selected based on the results of performance testing and specified criteria. The participant generates data that identifies the selected set of channels and provides that data to other participants of the communications network. The participants communicate over the set of channels, such as by using a frequency hopping protocol. When a specified time expires or monitoring of the performance of the channel set identifies poor performance of the set of channels, the participant selects another set of channels for use in communications based on additional performance testing. By selecting channels based on the initial performance testing and performance monitoring, the communications network adaptively avoids channels with poor performance. | 02-12-2015 |
20150055683 | BEACON WITH INTERNAL GEOGRAPHIC LOCATION TRACKING THAT TRANSMITS THE LOCATION IN A SHORT-AND-INSTANT TELEMETRY MESSAGE - Systems, methods and apparatus are provided through which in some implementations a geographic location of a beacon is determined by a component integrated within or in close proximity to the beacon and the geographic location is communicated to an external network using a wireless communications channel between the beacon and the external network. | 02-26-2015 |
20150055684 | WIRELESS COMMUNICATION SYSTEM - A method for communication includes transmitting a first uplink message from a first remote node ( | 02-26-2015 |
20150063425 | METHODS AND DEVICES FOR MITIGATING INTERFERENCE WITH FHSS SIGNALS - Methods and devices for mitigating interference with a signal of a frequency hopping spread spectrum system are disclosed. A second signal is detected, and a property of the second signal is determined. At least one of a set of designated frequency channels used by the frequency hopping spread spectrum system is determined as having a property most similar to that of the second signal. The usage, by the frequency hopping spread spectrum system, of the at least one most similar designated frequency channel is then modified, for communication of data. | 03-05-2015 |
20150098490 | METHOD AND APPARATUS FOR FREQUENCY ASSIGNMENT IN A FREQUENCY HOPPING MODE OF A WIRELESS COMMUNICATION SYSTEM - A method and an apparatus are provided for transmitting and receiving uplink data in a wireless communication system. The method includes transmitting an uplink grant including resource allocation information and frequency hopping information; determining a resource for the uplink data based on the resource allocation information and a packet transmission number, if the frequency hopping information indicates that a predefined hopping pattern is enabled; and receiving the uplink data mapped on the determined resource. Mirroring is alternatively applied for determining the resource based on the packet transmission number. | 04-09-2015 |
20150110159 | DYNAMIC HOPPING SEQUENCE COMPUTATION IN CHANNEL HOPPING COMMUNICATION NETWORKS - In one embodiment, a device in a channel hopping, communication network independently maintains a slot counter, and computes a channel identification (ID) based on a function having inputs of a unique feature of the device, ii) a current slot of the slot counter, and iii) a set of possible channel IDs. Accordingly, the device configures its radio to receive on the computed channel ID for the respective current slot. In another embodiment, the device may determine, for a neighbor device, a current neighbor slot and unique neighbor feature, and correspondingly computes a neighbor channel ID based on the function using the unique neighbor feature, the current neighbor slot, and the set of a possible channel IDs. As such, the device configures its radio to transmit on the computed neighbor channel ID for the respective current neighbor slot. | 04-23-2015 |
20150131703 | Satellite Communications Management System - A method and apparatus for processing a signal is present. Information is carried in a frequency hopping signal. The frequency hopping signal is sent to a gateway in a communications network through a satellite. The frequency hopping signal is unprocessed by the satellite to identify the information in the frequency hopping signal. | 05-14-2015 |
20150146763 | APPARATUS AND METHOD FOR TRANSMISSION OF SOUNDING REFERENCE SIGNAL IN UPLINK WIRELESS COMMUNICATION SYSTEMS WITH MULTIPLE ANTENNAS AND SOUNDING REFERENCE SIGNAL HOPPING - Disclosed is a sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. The sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. In this environment, the sounding reference signal is transmitted through an antenna pattern through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead. | 05-28-2015 |
20150311948 | INTERLEAVING LOW TRANSMISSION POWER AND MEDIUM TRANSMISSION POWER CHANNELS IN COMPUTER NETWORKS - In a multiple interface, low power and lossy network comprising a plurality of nodes, a low transmission power and medium transmission power topology are defined for the network and a channel-hopping schedule is defined for the devices operating in each topology. A sender determines that data is capable of being transmitted via a link on the low transmission power topology. The sender determines the transmission parameters for the transmission of the data over the link on the low transmission power topology and determines a low transmission power channel for transmission of the data. The sender transmits the determined channel and the transmission parameters to the receiver. The sender transmits the data via the determined channel in the low transmission power topology. | 10-29-2015 |
20160020822 | TYPE 1 AND TYPE 2 HOPPING FOR DEVICE-TO-DEVICE COMMUNICATIONS - Methods, systems, and devices are described for coordinating a device to device (D2D) hopping scheme with a wide area network (WAN) hopping scheme. In one aspect, a method may include identifying, by a base station, a WAN frequency hopping scheme. The base station may coordinate a D2D frequency hopping scheme a D2D enabled user equipment (UE) with the identified WAN frequency hopping scheme, and communicate the D2D frequency hopping scheme to the D2D enabled UE. In one aspect, the D2D frequency hopping pattern may apply to retransmissions between two D2D enabled UEs. Another method may include receiving, by a D2D enabled UE, a D2D frequency hopping scheme from a base station, where the D2D frequency hopping scheme is coordinated with a WAN frequency hopping scheme. The D2D enabled UE may transmit at least one message to a second D2D enabled UE according to the D2D frequency hopping scheme. | 01-21-2016 |
20160065295 | ANTENNA-DIVERSITY RECEIVER AND METHOD OF OPERATING AN ANTENNA-DIVERSITY RECEIVER AND A TRANSMITTER IN A FREQUENCY-HOPPING COMMUNICATION SYSTEM - An antenna-diversity receiver receives data units from a transmitter in a frequency-hopping communication system. The frequency-hopping system has a channel set comprising of multiple channels, each having its own frequency range. The channel set comprises a set of multiple advertising channels and a set of multiple data channels. The receiver comprises an antenna set of multiple antennas. | 03-03-2016 |
20160087674 | Ultra-Wideband Frequency Position Modulation using Nonlinear Compressed Sensing - A Frequency Position Modulation system for encoding signals for transmission. A signal's discrete frequency support is used to represent symbols. The signal can be non-uniformly spread over many GHz of instantaneous bandwidth, resulting in a communications system that is resilient to interference and difficult to intercept. The FPM symbols are recovered using adaptive projections that use an analog polynomial nonlinearity paired with an analog-to-digital converter that is sampling at a rate at that is only a fraction of the instantaneous bandwidth of the signal. In the presence of partial band interference, nonlinearities generated by the transmitter of are exploited by the receiver to help unambiguously recover tones that could otherwise be lost. The nonlinearities are generated by driving the power amplifier of the transmitter into saturation to induce distortions at a desired level. | 03-24-2016 |
20160150504 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for transmitting a device-to-device (D2D) signal from a first user equipment in a wireless communication system, wherein the signal transmission method comprises the steps of: deciding a physical resource block through frequency-hopping; and mapping data onto the physical resource block that is decided, wherein a hopping offset value common to a first cell and a second cell is used for the frequency-hopping, when a second user equipment for receiving the signal belongs to the second cell, which is not the first cell to which the first user equipment belongs. | 05-26-2016 |
20160182121 | DYNAMIC ASSIGNMENT OF FREQUENCY HOPPING SEQUENCES IN A COMMUNICATION NETWORK | 06-23-2016 |
20160187460 | RSSI POSITIONING METHOD BASED ON FREQUENCY-HOPPING SPREAD SPECTRUM TECHNOLOGY - An RSSI positioning method based on frequency-hopping spread spectrum technology, comprising: calibration stage: measuring the RSSI values of a plurality of channels at fixed points, and recording and calculating the ranging parameters in an RSSI ranging model; system preparation: deploying a positioning anchor node, and realizing synchronization between a target node and the anchor node; conducting communication on the target node by respectively utilizing a plurality of channels to obtain the RSSI values; signal processing stage: processing the RSSI into signal strength amplitude and performing optimization; and positioning stage: calculating a distance and the target node position on a positioning server according to each of the signal strength. The present invention solves the problem that low RSSI positioning precision cannot satisfy the actual requirements because a traditional RSSI positioning method is limited to factors such as multipath signal transmission, co-channel interference, obstacle interference and low coordinate calculation precision of a trilateration method. | 06-30-2016 |