Patent application number | Description | Published |
20080204319 | Method and system for analog beamforming in wireless communication systems - A method and system for analog beamforming in a wireless system is provided. Analog beamforming involves performing an iterative beam acquisition process based on beam search training, determining transmit and receive beamforming vectors including phase weighting coefficients, based on the iterative beam acquisition process. Each iteration includes estimating the receive and transmit beamforming coefficients alternatively, until the receive and transmit beamforming coefficients converge. | 08-28-2008 |
20080225818 | SYSTEM AND METHOD FOR PROCESSING WIRELESS HIGH DEFINITION VIDEO DATA USING REMAINDER BYTES - A method and system for processing high definition video data using remainder bytes is disclosed. In one embodiment, the method includes receiving an information packet having the length of L bytes, wherein L=(M×n×K)+A, and where: M is the depth of an interleaver, n is the number of interleavers, K is an encoding code length and A is the number of remainder bytes with respect to M×n×K bytes, wherein the remainder bytes are located at the end of the information packet, and wherein M×n×K bytes represent M×n codewords. The method further includes converting the A remainder bytes into a plurality of shortened codewords, wherein each of the shortened codewords is shorter in length than each of the M×n codewords. At least one embodiment of the invention provides much lower padding efficiency while improving the decoding performance. | 09-18-2008 |
20080225819 | SYSTEM AND METHOD FOR PROCESSING WIRELESS HIGH DEFINITION VIDEO DATA USING A SHORTENED LAST CODEWORD - A method and system for processing high definition video data to be transmitted over a wireless medium is disclosed. In one embodiment, the method includes receiving an information packet having the length of L bytes, wherein L=(M×n×K)+A, and where: M is the depth of an interleaver, n is the number of interleavers, K is an encoding code length and A is the number of remainder bytes with respect to M×n×K bytes, wherein the remainder bytes are located at the end of the information packet. M×n×K bytes represent M×n codewords, wherein the remainder bytes sequentially form a plurality of remainder codewords, and wherein the plurality of remainder codewords comprise a last codeword which is located at the end of the remainder codewords. The method further includes i) shortening the last codeword such that the resultant shortened codeword is shorter in length than each of the remaining codewords of the information packet and ii) adding dummy bits to the outer encoded data so as to meet a predefined size requirement for an outer interleaver. | 09-18-2008 |
20080253462 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO USING MODE CHANGES BASED ON CHANNEL FEEDBACK (CF) - Method and system for transmission of uncompressed video information from a sender to a receiver over wireless channels are disclosed. For example, according to one embodiment, when channel conditions (e.g., noise or interference) worsens, one or more least significant bits (LSB) of pixel data are not transmitted to save bandwidth for more efficient transmission. Furthermore, the remaining one or more of the most significant bits (MSB) of the pixel data are transmitted with coding and/or modulation schemes that provides extra error protection, relative to what is needed in regular channel conditions. | 10-16-2008 |
20090016359 | SYSTEM AND METHOD FOR PROCESSING HIGH DEFINITION VIDEO DATA TO BE TRANSMITTED OVER A WIRELESS MEDIUM - A system and method for processing high definition video data to be transmitted over a wireless medium is disclosed. In one embodiment, the system includes i) at least one convolutional encoder configured to input a plurality of video data streams and output a plurality of encoded data streams, each of the plurality of encoded data streams comprises a plurality of data bits, ii) at least one multiplexer configured to multiplex the plurality of encoded data streams into a multiplexed data stream based on a multiplexing order, wherein the multiplexing order represents the number of data bits multiplexed together at one time and iii) a quadrature amplitude modulation (QAM) mapper configured to perform QAM mapping for the multiplexed data stream. At least one embodiment provides a simple, yet effective, solution using an s-group multiplexing instead of bit-by-bit multiplexing. | 01-15-2009 |
20090033555 | Method and system for analog beamforming in wireless communications - A method and system for analog beamforming for wireless communication is provided. Such analog beamforming involves performing channel sounding to obtain channel sounding information, determining statistical channel information based on the channel sounding information, and determining analog beamforming coefficients based on the statistical channel information, for analog beamforming communication over multiple antennas. | 02-05-2009 |
20090046010 | SYSTEM AND METHOD FOR EFFICIENT TRANSMIT AND RECEIVE BEAMFORMING PROTOCOL WITH HETEROGENEOUS ANTENNA CONFIGURATION - A system and method of training antennas for two devices having heterogeneous antenna configurations in a wireless network is disclosed. The method includes communicating one or more estimation training sequences between two devices via a phased array antenna and a switched array antenna, wherein a beamforming vector of the phased array antenna is switched between phase vectors within a set of weight vectors while the switched array antenna is switched within a plurality of antenna sectors. The method further includes tuning at least one of the phase array and switched array antennas with an antenna parameter selected based at least in part on the one or more estimation training sequences. The method further includes communicating data messages via at least one of the phase array and switched array antennas so tuned. | 02-19-2009 |
20090046012 | SYSTEM AND METHOD FOR TRAINING THE SAME TYPE OF DIRECTIONAL ANTENNAS THAT ADAPTS THE TRAINING SEQUENCE LENGTH TO THE NUMBER OF ANTENNAS - Systems and methods of training antennas for two devices equipped with phased array antennas in a wireless network are disclosed. In one embodiment, the methods include transmitting a plurality of estimation training sequences from a transmit phased array antenna to a receive phased array antenna, wherein a length of at least one of the plurality of training sequences is adapted to a number of antenna elements at one of the transmit and receive phased array antennas. The methods further include transmitting data to the receive phased array antenna via the transmit phased array antenna tuned with a transmit beamforming vector (BV) selected based at least in part on the plurality of estimation training sequences. | 02-19-2009 |
20090046765 | SYSTEM AND METHOD FOR ACQUIRING BEAMFORMING VECTORS USING TRAINING SEQUENCES WITH ADAPTIVE SPREADING GAINS - A method and system for acquiring beamforming vectors using multiple spreading sequence spreading gains is disclosed. One embodiment of the invention allows time and power to be saved by spreading a training sequence with spreading sequences of different gains in different iterations of an iterative beamforming acquisition procedure. In one embodiment of the invention, the method comprises modulating, at a first station, a first training sequence with a first source beamforming vector, wherein the first training sequence has a first spreading gain, transmitting the modulated first training sequence to a second station, receiving a first response signal from the second station, obtaining a second source beamforming vector based on the first response signal, modulating, at the first station, a second training sequence with the second source beamforming vector, wherein the second training signal has a second spreading gain which is different from the first spreading gain, transmitting the modulated second training sequence to the second station, receiving a second response signal from the second station, obtaining a third source beamforming vector based on the second response signal, and determining whether to use the third source beamforming vector to modulate a data signal to be transmitted to the second station. | 02-19-2009 |
20090046798 | SYSTEM AND METHOD FOR ACQUIRING A TRAINING MATRIX FOR A BREAMFORMING ACQUISITION PROTOCOL USING A BUTSON MATRIX - A method and system for obtaining and transfer matrix and or acquiring beamforming vectors using a Butson matrix is disclosed. In one embodiment, the method includes i) determining the number (N) of transmitter antennas, ii) obtaining a unitary matrix having M rows and M columns, wherein M is an greater than or equal to N, and wherein the elements of the matrix are selected from the group consisting of: +1, −1, +j, and −j, iii) selecting N rows of the unitary matrix and iv) generating a training matrix having N rows and M columns based on the selected N rows. The method may further include obtaining a source beamforming vector using the training matrix. | 02-19-2009 |
20090046807 | Method and system for beamforming communication in wireless communication systems - A method and system for beamforming communication in a wireless communication system that includes a wireless initiator and a wireless responder is provided. A channel matrix is estimated at the responder. The singular value decomposition of the channel matrix yields the right singular matrix, which is further deconstructed into certain components. The right singular matrix components are quantized in a vector fashion and fed back to the initiator for reconstruction and beamforming communication. | 02-19-2009 |
20090047910 | SYSTEM AND METHOD FOR TRAINING DIFFERENT TYPES OF DIRECTIONAL ANTENNAS THAT ADAPTS THE TRAINING SEQUENCE LENGTH TO THE NUMBER OF ANTENNAS - A system and method of training antennas for two devices having different types of directional antennas in a wireless network is disclosed. The method includes transmitting a plurality of estimation training sequences from a transmit directional antenna to a receive directional antenna. The length of at least one of the plurality of training sequences is adapted to a number of antenna elements at one of the transmit and receive directional antennas. The method further includes transmitting data to the receiver via the transmit directional antenna tuned with an antenna parameter that is selected based at least in part on the plurality of estimation sequences. | 02-19-2009 |
20090047999 | Method and system for beamforming communication in wireless communication systems - A method and system for beamforming communication in a wireless communication system that includes a wireless initiator and a wireless responder is provided. A communication channel matrix is estimated at the responder based on training symbols from the initiator. The estimated channel matrix is then deconstructed into certain components, and the matrix components are quantized for feedback to the initiator for channel matrix reconstruction and beamforming communication. | 02-19-2009 |
20090058724 | Method and system for analog beamforming in wireless communication systems - A method and system for analog beamforming in wireless communication system, is provided. Analog beamforming coefficients are constructed by performing an iterative beam acquisition process based on beam search training, and determining optimized beamforming weighting coefficients based on the iterative beam acquisition process. | 03-05-2009 |
20090121935 | SYSTEM AND METHOD OF WEIGHTED AVERAGING IN THE ESTIMATION OF ANTENNA BEAMFORMING COEFFICIENTS - A system and method of training transmit or receive antenna array is disclosed. The method includes: a) entering an antenna training mode, b) receiving a training sequence to form a channel matrix (Q), c) constructing an updated receive beamforming vector (w) via a weighted averaging method, the weighted averaging comprising: | 05-14-2009 |
20090141824 | METHOD AND SYSTEM FOR GENERATING CANDIDATE BEAMFORMING COEEFICIENTS FOR TRANSMISSION OF DATA OVER A WIRELESS MEDIUM - A method and system for generating a number of candidate beamforming vectors for transmission of data over a wireless medium, is provided. One implementation involves determining the number (N) of transmitter antennas; determining the number (n) of candidate beamforming vectors to be constructed as an algebraic function of N; providing a Fourier transform matrix W comprising (n+1) rows and (n+1) columns; selecting N rows from the Fourier transform matrix W; and generating an abridged matrix using the selected N rows, wherein each column of the abridged matrix is configured to be used as a candidate beamforming vector for transmission of a data signal, such that the abridged matrix comprises a N×n sub-matrix of the Fourier transform matrix W. | 06-04-2009 |
20090189812 | SYSTEM AND METHOD FOR MULTI-STAGE ANTENNA TRAINING OF BEAMFORMING VECTORS - A system and method for multi-stage antenna training of beamforming vectors is disclosed. In one embodiment, the method comprises a method of acquiring a beamforming pattern in a wireless communication system, the method comprising receiving a first plurality of signals having different transceiver sector patterns, measuring first indicators of link quality corresponding to the first plurality of signals, selecting at least one transceiver sector pattern based on the first indicators of link quality, receiving a second plurality of signals having different transceiver beam patterns, each transceiver beam pattern associated with the selected at least one transceiver sector pattern, measuring second indicators of link quality corresponding to the second plurality of signals, and selecting at least one transceiver beam pattern based on the second measures of link quality. | 07-30-2009 |
20090193300 | SYSTEM AND METHOD FOR PSEUDORANDOM PERMUTATION FOR INTERLEAVING IN WIRELESS COMMUNICATIONS - A system and method for pseudorandom permutation for interleaving in wireless communication is disclosed. In one embodiment, the method comprises receiving a first ordered sequence of communication symbols having a first order, permuting the first ordered sequence of communication symbols to generate a second ordered sequence of communication symbols having a second order, and outputting the second ordered sequence of communication symbols, wherein the second order is based, at least in part, on a third order having a greater size than the second order, the third order being a pseudorandom permutation defined by the input-output relationship | 07-30-2009 |
20090233556 | METHOD AND SYSTEM FOR BEAMFORMING COMMUNICATION IN HIGH THROUGHPUT WIRELESS COMMUNICATION SYSTEMS - A method and system for beamforming communication in high throughput wireless communications. Analog beamforming involves constructing analog beamforming coefficients for beamforming communication on a wireless channel. Constructing analog beamforming coefficients includes selecting a signal tap from a multi-tap wireless channel for beamforming communication, wherein the selected signal tap has a higher signal quality relative to other signals taps, and determining beamforming coefficients for the selected tap by iterative acquisition of the coefficients based on power iteration. | 09-17-2009 |
20090274233 | METHOD AND SYSTEM FOR PHASE TRACKING IN WIRELESS COMMUNICATION SYSTEMS - A method and system phase tracking in a wireless communication system is provided. Phase tracking involves receiving a first Orthogonal Frequency Division Multiplexing (OFDM) symbol and a second OFDM symbol which is a repetition of the first symbol, over a wireless channel, the symbols representing an incoming signal. A phase of the incoming signal is extracted by performing phase tracking across all subcarrier data tones and pilot tones of the symbols. | 11-05-2009 |
20100009635 | SYSTEM AND METHOD FOR ANTENNA TRAINING OF BEAMFORMING VECTORS HAVING REUSE OF DIRECTIONAL INFORMATION - A system and method for reusing existing directional information to configure antennas in a wireless network is disclosed. The method includes retrieving existing directional information, the existing directional information having been established in a previous antenna training session with a receiver. The method further includes performing a signal-to-noise ratio (SNR) estimation procedure comprising: transmitting an SNR estimation probe message to the receiver via a directional antenna tuned with the existing directional information, and determining whether an estimated SNR value associated with the SNR estimation probe message is equal to or greater than a threshold SNR value. The method further includes transmitting a data message to the receiver via the directional antenna tuned with the existing directional information if it is determined that the estimated SNR value is equal to or greater than the threshold SNR value. | 01-14-2010 |
20100020770 | SYSTEM AND METHOD FOR BANDWIDTH RESERVATION PROTOCOL FOR SPATIAL REUSE IN A WIRELESS COMMUNICATION NETWORK - A system and method for providing spatial reuse in a wireless network for communicating compressed and uncompressed audio/video is disclosed. A bandwidth reservation request for data communication with a receiver to a coordinator is transmitted. A first response indicating availability of the receiver for the data communication is received. A channel is listened to by a station for channel busy indication (CBI) messages transmitted by other stations in the wireless network. A local channel occupation report comprising data indicative of one or more time periods during which one or more other stations in the wireless network are scheduled to transmit data messages is transmitted to the coordinator. A second response comprising data indicative of one or more allocated channel time slots is received. Audio and/or video (A/V) data is transmitted to the receiver during the allocated channel time slots. | 01-28-2010 |
20100026560 | METHOD AND SYSTEM FOR ANTENNA TRAINING AND COMMUNICATION PROTOCOL FOR MULTI-BEAMFORMING COMMUNICATION - A method and system for antenna training for communication of multiple parallel data streams between multiple-input multiple-output communication stations is provided. An implementation involves performing antenna training by obtaining optimal antenna training coefficients by multi-stage iteration in estimating the multi-dimensional beamforming coefficients. | 02-04-2010 |
20100103893 | SPATIAL DIVISION MULTIPLE ACCESS WIRELESS COMMUNICATION SYSTEM - A method and system for wireless communication in a network of wireless devices, is disclosed. The network includes multiple stations (STAs) and an access point (AP). Each wireless device includes plural antennas. In one embodiment, multiple stations accessing the access point at the same time using a spatial division multiple access (SDMA) protocol. The SDMA protocol involves performing an iterative antenna training process for obtaining principle singular vectors for beamforming communication over a wireless channel without explicit knowledge of the channel. | 04-29-2010 |
20100130264 | METHOD AND SYSTEM FOR COMMUNICATION OF DIFFERENT MODULATION FORMATS FROM A WIRELESS STATION IN A WIRELESS SYSTEM - A method and system for wireless communication in a wireless station including a transceiver with multiple antennas, is provided. In one implementation, the wireless station performs multiple modulation communication by multiplexing different signal carrier modulation formats by antenna cross polarization multiplexing, including mapping the modulation formats to multiple antenna cross polarization branches. Communication power is allocated for each polarization branch by selectively distributing power to each of the polarized antennas based on at least one of: application data rate requirements, communication link quality indication (LQI) and delay spread of cross polarized channels. Data is transmitted utilizing the modulation formats simultaneously at the same frequency over multiple cross polarized antennas. | 05-27-2010 |
20110237196 | SYSTEM AND METHOD FOR EFFICIENT TRANSMIT AND RECEIVE BEAMFORMING PROTOCOL WITH HETEROGENEOUS ANTENNA CONFIGURATION - A system and method of training antennas for two devices having heterogeneous antenna configurations in a wireless network is disclosed. The method includes communicating one or more estimation training sequences between two devices via a phased array antenna and a switched array antenna, wherein a beamforming vector of the phased array antenna is switched between phase vectors within a set of weight vectors while the switched array antenna is switched within a plurality of antenna sectors. The method further includes tuning at least one of the phase array and switched array antennas with an antenna parameter selected based at least in part on the one or more estimation training sequences. The method further includes communicating data messages via at least one of the phase array and switched array antennas so tuned. | 09-29-2011 |
20120207223 | SYSTEM AND METHOD FOR DIGITAL COMMUNICATIONS USING MULTIPLE PARALLEL ENCODERS - Devices and methods for processing wireless high definition video data to be communicated in an uncompressed format over a wireless medium is disclosed. In one embodiment, an encoder includes a first outer encoder that encodes a first portion of a video data stream. A second outer encoder encodes a second portion of the video data stream. A first parser parses the first encoded data stream into first sub-video data streams. A second parser parses the second encoded data stream into second sub-video data streams. | 08-16-2012 |