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Pulse Or Digital Communications > Systems Using Alternating Or Pulsating Current > Plural Channels For Transmission Of A Single Pulse Train > Diversity DiversityDiversity patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/22/07 - 20070268983 - Method and apparatus for space division multiple access receiver Methods and systems consistent with this invention receive a plurality of transmitted signals in a receiver having a plurality of receive elements, wherein each transmitted signal has a different spatial location. Such methods and systems receive the plurality of transmitted signals at the plurality of receive elements to form a ... 11/22/07 - 20070268982 - Frequency hopping of pilot tones Presented are systems and methods for selecting a subband for a pilot tone in a communication system and transmitting and receiving data units that include pilot tones. In one embodiment, a method is presented comprising determining a channel parameter and selecting a subband for the pilot tone based upon the ... 11/15/07 - 20070263744 - Systems and methods for interference cancellation in a multiple antenna radio receiver system Interference cancellation is implemented for a multiple antenna system. The multiple antenna receiver is provided that includes a whitening filter coupled to receive processed signals corresponding to signals received at respective antennas, and to generate whitened signals corresponding to each of the received signals, having a colored noise component whitened. ... 11/15/07 - 20070263743 - Method for allocating data and pilots, and transmitting method and device and receiving method and device using the same in orthogonal frequency division multiple access system Disclosed is a method for allocating data and pilots, a transmitting method and device, a receiving method and device in an OFDMA system. A terminal partitions subcarrier groups and symbols from an uplink channel based on a basic pilot pattern generated by a specific reference, receives at least one subchannel ... 11/08/07 - 20070258541 - Wireless communication system, wireless communication apparatus and wireless communication method A wireless communication system which performs data transmission from a first terminal including N antennas to a second terminal including M antennas using spatially multiplexed streams (N and M are integers larger than or equal to 2 and N<M) is disclosed. The system includes training request means, training means, channel ... 11/08/07 - 20070258539 - Wireless cmmunication system with diversity/mimo array branch decoupling A method and device for determining decoupled signal parameters of received signals associated with individual antenna elements of an antenna array is disclosed. The method comprises the steps of determining a receiving characteristic of the antenna array, establishing an identity characteristic associated with the antenna array, the identity characteristic independently ... 11/08/07 - 20070258538 - Multiple input, multiple output communications systems Embodiments of the present invention include systems and methods for optimizing the transmitter and receiver weights of a MIMO system. In one embodiment, the weights are optimized to create and steer beam nulls, such that each transmitted signal is substantially decoupled from all other signals between a MIMO transmitter a ... 11/08/07 - 20070258537 - Method of determining at least one transmit mode parameter for a multiple-input multiple-output system In an embodiment of the method, at least one signal-to-interference-and-noise ratio (SINR) for each antenna configuration in a set of transmission antenna configurations is determined based on an estimated channel characteristic. At least one received signal characteristic is determined for each antenna configuration in the set of antenna configurations based ... 11/08/07 - 20070258536 - Method and system for reordered qrv-lst (layered space time) detection for efficient processing for multiple input multiple output (mimo) communication systems Aspects of a method and system for reordered QRV-LST (layered space time) detection for efficient processing for multiple input multiple output (MIMO) communication systems are presented. The method may include receiving an ordered plurality of signals wherein each of the ordered plurality of received signals comprises information contained in an ... 11/01/07 - 20070253508 - Apparatus and method for selecting effective channel in a multi-user mimo system An apparatus and method for selecting an effective channel in a multi-user MIMO system are provided, in which a receiver receives pilot signals from a transmitter, determines channel information indicating an antenna offering the best quality among a plurality of antennas using the pilot signals, and generates feedback information with ... 11/01/07 - 20070253507 - Self-adaptive mimo transmission/reception system and method A self-adaptive multiple-input multiple-output (MIMO) transmission/reception system includes a transmitter provided with a serial-to-parallel converter, channel encoders, a plurality of constellation mappers, and transmission power controllers, and a receiver provided with a transmission scheme selection device, a zero forcing/minimum mean square error (ZF/MMSE) detector, reception power controllers, constellation demappers, channel ... 11/01/07 - 20070253506 - Cdma transmission apparatus and cdma transmission method A control section (110) recognizes the type of data included in a transmission signal and outputs a control signal (C1) to an S/P conversion section (101) and a spreading control section (107). The S/P conversion section (101) apportions a specific type of data output from the control section (110) to ... 10/18/07 - 20070242770 - Feedback of channel state information for mimo and subband scheduling in a wireless communication system Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency; across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels ... 10/11/07 - 20070237254 - Configuring a device for wireless communication A method of configuring a device for a wireless communication, the method comprising the steps of: selecting a first combination of resources in relation to a first wireless communication in a first area involving a first device, and selecting one or more other combination(s) of resources in relation to one ... 10/04/07 - 20070230609 - Iterative detection and decoding apparatus and method in mimo system An iterative detection and decoding method in a Multiple Input Multiple Output (MIMO) system includes detecting entire MIMO nodes to generate soft decision values; decoding a first soft decision value among the soft decision values; determining whether to perform an iterative detection and decoding by measuring reliability of the decoded ... 10/04/07 - 20070230608 - Method and apparatus for quasi maximum likelihood mimo detection Techniques for MIMO detection that has performance approaching that of a maximum likelihood (ML) algorithm while having a reduced computational complexity are described. One method of an embodiment decomposes a MIMO channel into a 2×2 system. QR decomposition and maximum likelihood detection may be performed on the 2×2 system. Thereafter, ... 09/27/07 - 20070223619 - Apparatus and method for feeding back information on channel state for scheduling in multiple antenna system An apparatus and method for controlling amount of information to be fed back in a multiple antenna system in a multi-user environment. The apparatus includes a channel estimator which estimates channel values by using an input signal; a Singular Value Decomposition (SVD) operator which decomposes singular values from the estimated ... 09/27/07 - 20070223618 - Apparatus and method for transmitting/receiving signal in a communication system using multiple input multiple output scheme An apparatus for transmitting a signal in a Multiple Input Multiple Output (MIMO) communication system includes determining transmission antennas to be used by a signal transmission apparatus depending on channel quality information received from a reception apparatus, encoding an input information data stream into a codeword using a coding scheme, ... 09/27/07 - 20070223616 - Radio communication apparatus and radio communication system A radio communication apparatus that can more precisely grasp, in a case of using a plurality of antenna elements to receive radio signals, the reception qualities of the respective antenna elements to improve the error rate of received signals. In the apparatus, a lower-order bit likelihood extracting part (107) extracts, ... 09/27/07 - 20070223615 - Transceiver interface architecture A transceiver interface architecture where the same RF transceiver can be used in wireless devices that support any number of standards, with or without receive diversity implementation. Each input port of the RF transceiver can be shared by a number of input signals, which effectively expands the number of available ... 09/27/07 - 20070223614 - Common time frequency radio resource in wireless communication systems A wireless communication network (100) wherein a network entity assigns one or more symbol vectors to each of a plurality of communication entities in the network for substantially simultaneous communication on a common time frequency radio resource also assigned to the plurality of communication entities. The vectors assigned to the ... 09/20/07 - 20070217539 - Method of transmitting data and estimating channel information in ofdm/ofdma mobile communications system A method of feeding back channel information in an OFDM or OFDMA radio communications system is disclosed, in which a transmitting side instructs a region for measuring a downlink channel status and in which a receiving side feeds back the channel information to the transmitting side. The present invention includes ... 09/20/07 - 20070217538 - Systems and methods for improving performance of multiple spatial communication channels Embodiments include systems and methods for improving performance of multiple spatial communications channels. Embodiments comprise power loading a steering matrix to achieve improved performance. ... 09/20/07 - 20070217537 - Minimum error rate lattice space time codes for wireless communication A lattice space time coding arrangement for transmission systems is disclosed which enables construction of lattice space time codes with improved error rate performance for arbitrary receiver structures. ... 09/13/07 - 20070211816 - Apparatus and method for transmitting and receiving signals in a multi-antenna system An apparatus and method for transmitting and receiving a data stream in a multi-antenna system, in which a plurality of data streams are received, a plurality of code symbol sequences are generated by precoding the plurality of data streams, the code symbol sequences being mapped to the transmit antennas in ... 09/13/07 - 20070211815 - Method and apparatus for scaling soft bits for decoding A method and apparatus for scaling a soft bit for decoding in a wireless communication system are described. A scaling factor is calculated for a received symbol based on an estimated signal-to-noise ratio (SNR) of the received symbol and the scaling factor is applied to a soft bit of the ... 09/13/07 - 20070211814 - Data transmission with spatial spreading in a mimo communication system For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol ... 09/13/07 - 20070211813 - Mimo precoding in the presence of co-channel interference Methods and systems for communicating in a wireless network include mitigating co-channel interference (CCI) for precoded multiple-input multiple-output (MIMO) systems and incorporating the effect of CCI mitigation on channel characteristics in the design of channel state information (CSI) feedback mechanisms. Various embodiments and variants are also disclosed. ... 09/06/07 - 20070206699 - Adaptive space-time coding and modulation method and transmitter Embodiments of the present invention provides an adaptive space-time coding and modulation method and a transmitter. In one embodiment, the method includes: obtaining a curve corresponding to a modulation mode, a channel coding rate, a coding mode of a space-time code, a parameter indicating signal transmission quality and SNR by ... 09/06/07 - 20070206698 - Transmission/reception apparatus and method for supporting mimo technology in a forward link of a high rate packet data system An apparatus and method for allocating dedicated pilots for supporting MIMO and setting MIMO-only interlace slots in a CDMA 2000 Nx-EV-DO compatible system. The method includes determining whether a current interlace is a particular interlace in which a Multiple Input Multiple Output (MIMO) signal for channel estimation in a receiver ... 09/06/07 - 20070206697 - Signal receiving method and signal receiving equipment for multiple input multiple output wireless communication system In a multiple input/multiple output wireless communication system, a receiving signal is compensated based on a wireless channel state information matrix converted by lattice reduction. The distortion of the modulation constellation diagram of a signal is considered, a detection signal is processed, and an intermediate signal table containing at least ... 09/06/07 - 20070206696 - Method and system for an adaptive vblast receiver for wireless multiple input multiple output (mimo) detection Various aspects of a system for an adaptive VBLAST receiver for wireless MIMO detection may comprise utilizing log likelihood ratios (LLR) to selectively cancel interference in a received signal when information contained in one or more layers is encoded. Following the selective cancellation of interference, further computations may be performed ... 09/06/07 - 20070206695 - Selecting mcs in a mimo system An accurate total error rate performance can be measured using a computed error vector magnitude (EVM) per stream. Using this EVM, the receiver or the transmitter can advantageously generate an optimized modulation and coding scheme (MCS) that corresponds to a specific number of streams, modulation and coding rate for the ... 09/06/07 - 20070206694 - Modifying a signal according to a diversity parameter adjustment A signal is modified according to a current diversity parameter adjustment, and is transmitted from a modifying communication device to a feedback communication device. A feedback signal reflecting feedback information describing the signal as received by the feedback communication device is received. The feedback signal comprises frames, and a frame ... 08/30/07 - 20070201577 - Apparatus and method for signal reception in multiple input multiple output (mimo) communication system A method for signal reception in a Multiple-Input-Multiple-Output (MIMO) communication system is provided. The method enhances the efficiency of signal reception in the MIMO system and simplifies the algorithms of signal reception and soft decoding metrics generation. In other words, soft decisions are generated according to correlations between metrics corresponding ... 08/30/07 - 20070201576 - Method and system for transmitting/receiving data in a communication system Provided are a system and a method for transmitting/receiving data in a communication system. The method includes calculating a processing matrix of a transmission unit for transmitting data, a processing matrix of a reception unit for receiving the data, a channel matrix formed by a plurality of transmission antennas and ... 08/23/07 - 20070195907 - Method of transmitting and receiving data using superposition modulation in a wireless communication system A method of transmitting and receiving data using superposition modulation in a wireless communication system having multiple antennas is disclosed. More specifically, the method comprises encoding the at least one inputted data stream by a channel coding scheme, puncturing the at least one inputted coded data stream into at least ... 08/23/07 - 20070195906 - Method and apparatus for pilot multiplexing in a wireless communication system Techniques for multiplexing pilots in a wireless transmission are described. In one aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas, with each pilot sequence comprising pilot symbols sent in the time domain on a different set of subcarriers. The transmitter station further generates multiple pilot transmissions ... 08/16/07 - 20070189409 - Diversity transmitter and diversity transmission method The present invention concerns a diversity transmitter, comprising: transmit symbol input means (1) for inputting a symbol matrix (b) to be forwarded to a transmit processing means (2), said transmit processing means comprising supplying means (2a) for supplying columns of said symbol to a plurality of at least two branches, ... 08/16/07 - 20070189408 - Mobile station and method for channel sounding using a single radio frequency transmitter chain in a multiple-input multiple-output (mimo) system Embodiments of a mobile station and a method for channel sounding in a wireless network are generally described herein. Other embodiments may be described and claimed. In some embodiments, channel sounding is performed using a single radio frequency transmitter chain in a multiple-input multiple-output (MIMO) system. In some embodiments, portions ... 08/09/07 - 20070183529 - Selecting modulation and coding level and spatial rate for orthogonal frequency domain modulation systems Embodiments are directed to a link adaptation method that selects the optimum transmission scheme and modulation and coding signal (MCS) level within a MIMO system, based on optimal maximum throughput on the channels. The method selects the MCS levels and spatial rate values for broadband communication systems based on the ... 08/09/07 - 20070183528 - Space-time codes for linearly labelled pam, psk, qam and related constellations using gray mapping General algebraic space-time code constructions are presented for Gray-mapped 2K-PSK, 2K-PAM, and 4K-QAM constellations. The space-time codes achieve the rate-diversity tradeoff—i.e., they allow the transmission of information at the maximum rate possible for the given signaling constellation and the achieved transmit diversity level. New codes created by applying a nonsingular ... 08/09/07 - 20070183527 - Space-time transmit diversity systems and methods for ofdm applications Embodiments of the invention provide orthogonal Frequency Division Multiplexing-Space-time Block Codes (OFDMSTBC) mappings for code rate 1, 2 and 4 codes for 4 Transmit Antennas. To overcome the innate weakness of known codes, a new class of STBC codes is provided which is particularly suited for OFDM applications, although other ... 08/02/07 - 20070177688 - System and method employing linear dispersion over space, time and frequency Systems and methods for performing space time coding are provided. Two vector→matrix encoding operations are performed in sequence to produce a three dimensional result containing a respective symbol for each of a plurality of frequencies, for each of a plurality of transmit durations, and for each of a plurality of ... 07/19/07 - 20070165739 - High rate transmission diversity transmission and reception The performance and symbol rate in a wireless mobile system are increased by forming a transmission code matrix using transformed orthogonal codes, in such a way that the code is robust to channel statistics and operates well in both Ricean and (correlated) Rayleigh channels. Furthermore, the invention enables high symbol ... 07/19/07 - 20070165738 - Method and apparatus for pre-coding for a mimo system Systems and methodologies are described that facilitates computing a precoding index which correlates to a precoding matrix within a codebook. According to various aspects, systems and/or methods are described that facilitate computing an effective signal-to-noise ratio (SNR). Such systems and/or methods may further facilitate selecting a precoding matrix and a ... 07/19/07 - 20070165736 - Method and apparatus for selecting a beam combination in a mimo wireless communication system A method and apparatus for selecting a beam combination of beam switched antennas in a multiple-input multiple-output (MIMO) wireless communication system including a first node and a second node. The first node sends a plurality of modulation and coding scheme (MCS) requests to the second node. Each of the plurality ... 07/19/07 - 20070165735 - Method and apparatus for supporting transmit diversity in a receiver A method and apparatus for supporting transmit diversity are disclosed. A wireless communication system includes a transmitter having a plurality of transmit antennas and a receiver having at least one receive antenna. The transmitter transmits different pilot code sequences via each of the transmit antennas. The receiver comprises at least ... 07/12/07 - 20070160162 - Method and system for transmitting data in a communication system A method and system are provided for transmitting data in a multiple-input multiple-output (MIMO) communication system. A receiver sets the number of sub-streams of each column of a preceding matrix with respect to all precoding matrices of channels formed between the receiver and a transmitter and measures channel states with ... 07/12/07 - 20070160161 - Transmitter apparatus, receiver apparatus, and wireless communication method When space-time block code signals (103, 104) are to be transmitted, the patterns thereof are changed in accordance with data to be transmitted. This advantageously allows a good-quality data transmission to be achieved by the space-time block code signals (103, 104). In addition, since data can be transmitted by use ... 07/12/07 - 20070160160 - Wireless communication system, wireless communication apparatus, and resource assignment method used therein In a transmitting portion of a wireless communication apparatus, hopping pattern generating portions 16 and 17 produce hopping patterns independent from each other and specific to a transmitter. Subcarrier assigning portions 18 and 19 assign transmission symbol sequences to subcarriers 1 to R in accordance with the hopping patterns and ... 07/05/07 - 20070153935 - Method and device for cancelling interference in wireless communication system The present invention provides a transmitter having multiple transmitting antennas, comprising: SM/STC apparatus for performing spatial multiplexing or space-time coding diversity on data and for causing resulting signals to be transmitted parallel by multiple transmitting antennas; and a controller for controlling the SM/STC apparatus to operate in SM mode or ... 07/05/07 - 20070153934 - Constant uneven power loading in beamforming systems for high throughput wireless communications An apparatus and method for closed-loop signaling over multiple channels in a telecommunication system, wherein a power loading method using constant uneven power loading under the power sum constraint is utilized. The detection of power loadings at the receiver is not necessary, which simplifies the receiver design. Nor is there ... 06/28/07 - 20070147538 - Apparatus and method for canceling interference from neighbor cells in broadband communication system An apparatus and method for canceling an interference signal in a broadband wireless communication system are provided. A receiver of a wireless communication system includes at least two receive antennas for receiving a target signal of a serving base station and interference signals of at least one neighbor base station; ... 06/28/07 - 20070147537 - Apparatus and method for calibration in a communication system In a calibration apparatus in a communication system, a modulation unit calculates a reference signal by modulating a downlink signal, and a digital Intermediate Frequency (IF) unit converts the reference signal to an intermediate frequency signal. An up-converter converts the intermediate frequency signal to a Radio Frequency (RF) signal, and ... 06/28/07 - 20070147536 - Wireless communication device employing interference-sensitive mode selection and associated methods Embodiments of a wireless communication system employing interference-sensitive mode selection and associated methods are generally introduced. ... 06/28/07 - 20070147535 - Method for rate adaptation with extended mcs set for wideband eigen-beamforming transmission A method for rate adaptation with extended MCS set for wideband eigen-beamforming transmission. A signaling method over multiple channels in a wireless telecommunication system including a transmitter and a receiver, performs the steps of obtaining an information bit stream, selecting the number of transmission streams, selecting different transmission rates for ... 06/28/07 - 20070147534 - Method and system for power loading implementation detection in beamforming systems A method of detecting the power loadings at a receiver wherein estimation of power loadings based on the received reference signals is unnecessary. Channel condition is obtained for each channel and transmission power loading per channel is detected according to channel condition, wherein estimation of power loadings based on the ... 06/28/07 - 20070147533 - Method and system for aggregate channel estimation for frequency-selective transmit beamforming A system (10) and method (50) of operating a wireless communication system between a transmit device (12) employing an array of transmit antennas and a receiver (15) can include transmitting (52) a beamformed signal with antenna weights computed based on knowledge of a plurality of channels forming an aggregate channel ... 06/28/07 - 20070147532 - Method and system for injecting sub-synchronization signals A method and system of communicating sub-synchronization information into a transmitted digital audio stream and extracting sub-synchronization information from a received digital audio stream is provided. The method includes the steps of having a transmitter introduce sub-synchronization information into a data stream at a period less than that of existing ... 06/21/07 - 20070140374 - Spatio-temporal processing for communication A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element and/or single receiver antenna element. The system is not restricted to wireless contexts and may exploit any ... 06/21/07 - 20070140373 - Constellation rearrangement for transmit diversity schemes A method of transmitting data in a wireless communication system from a transmitter to a receiver, comprising the steps of modulating data at the transmitter using a first signal constellation pattern to obtaing a first data symbol. The first data symbol is transmitteds to the receiver using a first diversity ... 06/21/07 - 20070140372 - Method and system for utilizing space-time codes for block fading channels A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that is configured to output a message signal, and an encoder that is configured to generate a code word in response to the message signal. The code word ... 06/21/07 - 20070140371 - Combining space time block code (stbc) with spatial multiplexing for mimo transmission A STBC-based transmission method and transmission system provides equal protection on all data streams such that all streams operate at the same SNR. STBC and spatial multiplexing are combined in a transmitter which provides equal STBC coding protection on all data streams. Such a combination of STBC with spatial multiplexing ... 06/21/07 - 20070140370 - Receiver and method for decoding a coded signal with the aid of a space-time coding matrix The disclosure relates to a method for decoding a received signal comprising symbols which are distributed in space and time with the aid of a space-time coding matrix, comprising a space-time decoding stage and at least two iterations, each of which comprising the following sub-stages: diversity pre-decoding, the opposite of ... 06/14/07 - 20070133709 - Apparatus and method for iterative detection and decoding (idd) in multi-antenna communication system An Iterafive Detection and Decoding (IDD) receiving apparatus and method in a multiple input multiple output (MIMO) communication system. The IDD receiving apparatus includes an MIMO detector which generates soft decision values of coded bits by MIMO-decoding a receive vector, feedback priori information, and a list of candidate coded symbol ... 06/14/07 - 20070133708 - Method and apparatus for allocating transmission power in communication system with multiple antennas In a method for allocating transmission power in a communication system including multiple antennas, a plurality of subcarriers are grouped by a plurality of groups, and each group includes at least one subcarrier. A transmission power weight and an antenna transmission vector are calculated for each group by using channel ... 06/14/07 - 20070133707 - Apparatus and method for determining transmit/receive antenna in communication system using multiple antennas Disclosed are an apparatus and a method for determining a transmit/receive antenna in a Multiple Input Multiple Output (MIMO) communication system. At least one sub-channel matrix including transmit antenna information and receive antenna information is generated. From the at least one sub-channel matrix, a sub-channel matrix having a maximum value ... 06/07/07 - 20070127589 - Log-likelihood ration (llr) generating apparatus and method in mimo antenna communication system A Log-Likelihood Ratio (LLR) generating apparatus and method in a communication system using a spatial multiplexing scheme. The reception method includes acquiring at least one estimated transmit vector by demodulating a receive vector using at least one Multiple Input Multiple Output (MIMO) detection process; selecting one of the at least ... 06/07/07 - 20070127588 - Method and apparatus for channel and noise estimation Techniques for performing channel and noise estimation for a MIMO transmission sent from multiple transmit antennas to multiple receive antennas are described. Samples are obtained from the receive antennas. For a first scheme, channel estimates are derived by correlating the samples with at least one pilot sequence, and signal, noise ... 06/07/07 - 20070127587 - Interleaver design for ieee 802.11n standard A MIMO wireless system includes a transmitter having a parser that parses a bit stream into multiple spatial data streams and multiple interleavers corresponding to the multiple spatial data streams, where each interleaver interleaves the bits in the corresponding spatial data stream by performing multiple column rotations and row rotation, ... 06/07/07 - 20070127586 - Multiple stream co-phasing for multiple-input-multiple-output (mimo) systems A system and method for transmitting multiple independent data streams from subsets of a plurality of radio antennas. The method includes determining by the receiver, an antenna partitioning, including relative phase rotations to be applied to each antenna, that results in the highest channel capacity among the possible partitionings. The ... 05/31/07 - 20070121753 - Wireless communications apparatus In a lattice-reduction-aided receiver based wireless communications system, soft estimates of transmitted bit values are determined from a received signal by applying lattice reduction to the channel estimate and equalising the received signal in accordance with the reduced basis channel, and determining probabilities of transmitted bits having particular values by ... 05/31/07 - 20070121752 - Wireless communication apparatus In a wireless receiving apparatus, comprising a plurality of antennas and a plurality of receivers each of which is provided for each antenna, each receiver uses a received signal that was received by the receiving antenna that is connected to it, and received signals that were received by the other ... 05/31/07 - 20070121751 - Methods and apparatus for beamforming training symbols in wireless multiple-input-multiple-output systems Embodiments of methods and apparatus for beamforming training symbols in wireless multiple-input-multiple-output systems are generally described herein. Other embodiments may be described and claimed. ... 05/31/07 - 20070121750 - Data transmission method and data reception method In a transfer apparatus to which MIMO-OFDM is applied, a data transmission method and a data reception method are provided in which, even when there are frequency errors varying among transfer paths, the precision of estimation of an inverse propagation coefficient function can be improved, thereby making it possible to ... 05/31/07 - 20070121749 - Method for pre-filtering training sequences in a radiocommunication system A training sequence is pre-filtered in a radiocommunication system having an emitter in the form of an antenna device with several antenna systems, thereby making it possible to transmit the training sequences through a pre-filter to said antenna systems side for reradiation by the emitter. Estimation enabling to form the ... 05/17/07 - 20070110180 - Configurable bit interleaving An integrated circuit radio transceiver and method therefor is operable to flexibly and efficiently interleave a digital bit stream arranged in a table characterized by N rows and N columns further including interleaving column and row bits in the table and frequency rotating interleaved bits in one interleaving step by ... 05/17/07 - 20070110179 - Transmitter diversity technique for wireless communications A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only of simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes space diversity and either time or frequency diversity. Space diversity is ... 05/10/07 - 20070104288 - Method and system for utilizing givens rotation expressions for asymmetric beamforming matrices in explicit feedback information Aspects of a method and system for utilizing Givens rotation expressions for asymmetric beamforming matrices in explicit feedback information are presented. In one aspect of the invention, Givens matrices may be utilized to reduce a quantity of information communicated in explicit feedback information via an uplink RF channel. The explicit ... 05/10/07 - 20070104287 - Mimo-cdma wireless communication equipment and method for pre-verifying thereof A MIMO-CDMA wireless communication equipment has a transmitter and a receiver. The transmitter has an encoder for receiving and encoding a plurality of data, and sending the data to a quadrature phase-shift keying (QPSK) unit. The QPSK unit conducts QPSK modulating to an output of the encoder and sends it ... 05/10/07 - 20070104286 - Equipment and method for mimo sc-fed communication system Equipment for a MIMO differential SC-FED communication system that includes a transmitter and a receiver is provided. The transmitter has a differential block encoder module for receiving a plurality of data block pairs and performing a circular convolution operation on the data blocks to produce a plurality of coded data ... 05/10/07 - 20070104285 - Digital wireless audio transmitter system employing time diversity A transmitter system that transfers digital data on a fixed frequency channel of a radio frequency band in the presence of interference from at least one FHSS interference source includes a time diversity generation circuit. The time diversity circuit compacts a duration of data frames then replicate the time compressed ... 05/03/07 - 20070098106 - Quantized multi-rank beamforming with structured codebook for multiple-antenna systems A quantized multi-rank beamforming technique that is adapted based on feedback from a receiver containing information that captures the existence of multiple transmission modes of the channel between the transmitter and receiver. The modes of the channel can be represented by a set of orthonormal eigenvectors. Rank selection chooses the ... 05/03/07 - 20070098105 - Nxn multiple-input multiple-output transceiver An N×N multiple-input multiple-output (MIMO) transceiver is provided. The transceiver includes a plurality of transceivers, each including at least one transceiver circuit; an oscillation unit which is configured to generate a differential signal which is supplied to the at least one transceiver circuit; a plurality of buffers, which are mounted ... 05/03/07 - 20070098104 - Method and system to maintain shapes of temporal pulses in wireless broadband signals transmitted through a dispersive antenna A radio frequency system for broadband wireless communication including one or more dispersive antennae operable to transmit and receive wireless broadband signals having a wide range of frequencies and one or more equalizers each in communication with a respective dispersive antenna and each operable to distort the broadband signals to ... 05/03/07 - 20070098103 - Receiving apparatus and transmitting apparatus A partial bit demodulation section (550) that demodulates partial bits among a plurality of bits that form 1 symbol of each modulated signal using a detection method different from likelihood detection, signal point reduction sections (514 and 516) that reduce the number of candidate signal points using demodulated partial bits, ... 04/26/07 - 20070092020 - Radio communication method and system, and receiver apparatus and transmitter apparatus There are provided: a channel estimation means which obtains channel estimation values between the transmitter antennas and the receiver antennas from received signals received by the receiver antennas; a memory for storing therein the reception signals and the channel estimation values obtained by said channel estimation means; and a signal ... 04/26/07 - 20070092019 - Beamforming for non-collaborative, space division multiple access systems A wireless communication system noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine ... 04/19/07 - 20070086541 - Apparatus and method for processing llr for error correction code in a mobile communication system An apparatus and method for scaling an LLR for an error correction code in a mobile communication system are provided. In the LLR scaling apparatus, an environment factor controller decides an environment factor according to a radio channel environment. A scaling factor generator generates a scaling factor using the environment ... 04/19/07 - 20070086540 - Apparatus and method for transmitting/receiving data in multi-user multi-antenna communication system Provided is an apparatus and method for transmitting/receiving data in a multi-user multi-antenna communication system. A data transmitting apparatus and method computes a RX filter or a TX filter for each user receiver in an improved scheme, selects a codebook correlating with the computed TX filter or the computed RX ... 04/19/07 - 20070086539 - High-performance ldpc coding for digital communications in a multiple-input, multiple-output environment Transceiver circuitry for use in a multiple-input, multiple-output (MIMO), orthogonal frequency-division multiplexing (OFDM), communications environment, is disclosed. Error correction coding according to a fixed-block size code, such as low density parity check (LDPC) coding, is implemented. A specific LDPC code with excellent error rate performance is disclosed. ... 04/19/07 - 20070086538 - Method of designing interleavers for multiple-encoder mimo ofdm systems An improved interleaver design to fully explore the diversity of the MIMO OFDM systems provides higher diversity gain than usual. A method for wireless data communication using such interleaver design implements parsing a bit stream into multiple spatial data streams, interleaving the bits in each spatial data stream by performing ... 04/12/07 - 20070081608 - Method for increasing accuracy for estimating mimo channel The present invention relates to a method for increasing accuracy for estimating a multiple input multiple output (MIMO) channel. In the method, a maximum delay spread of a channel is estimated by using a Gold code or a Kasami code, a loosely-synchronous (LS) code having an appropriate interference free window ... 04/12/07 - 20070081607 - Performing a scan of diversity parameter differences Modifying a signal according to a diversity parameter adjustment includes accessing scan parameter values, where a scan parameter describes a scan process. The scan parameter values include diversity parameter vectors, where a diversity parameter vector has a diversity parameter value for each of one or more diversity parameters. The scan ... 04/12/07 - 20070081606 - Multiple-input multiple-output communication system Radio stations (10, 20) include a variety of propagation models. A radio signal is transmitted from a first to a second radio station, and the received signal is fitted to a plurality of models. Alternatively, the correlation of the received signals is fitted to models. The received signals are processed ... 04/05/07 - 20070076812 - Technique to provide proprietary mimo format in a product and ability to support a new standard when the new standard is developed A technique to provide proprietary MIMO format in a product and ability to support a new standard when the new standard is developed for wireless communication in a MIMO system. A product may include a “hook” to allow for the protection of existing proprietary MIMO mode of operation, once a ... 04/05/07 - 20070076811 - Channel estimation for orthogonal preambles in a mimo system A general architecture scheme to perform channel estimation on orthogonal transmissions for any number of transmitting antennas present. Generally, the channel estimation is applicable for wireless communications in a MIMO system. ... 03/29/07 - 20070071127 - Method and apparatus for pilot communication in a multi-antenna wireless communication system Systems and methodologies are described that facilitate improved pilot information to MIMO user devices without increasing interference of SISO user devices in a wireless communication environment. A data communication signal can be generated and transmitted at a first power level, and a continuous pilot waveform comprising pilot information related to ... 03/29/07 - 20070071126 - Reconfigurable orthogonal frequency division multiplexing (ofdm) chip supporting single weight diversity A method and system for a reconfigurable orthogonal frequency division multiplexing (OFDM) chip supporting single weight diversity are provided. The reconfigurable OFDM chip may be configured to process signals such as IEEE 802.11, 802.16, and digital video broadcasting (DVB). The OFDM chip may generate channel weights to be applied to ... 03/22/07 - 20070064831 - Iterative detection and decoding for a mimo-ofdm system Techniques to iteratively detect and decode data transmitted in a wireless (e.g., MIMO-OFDM) communication system. The iterative detection and decoding is performed by iteratively passing soft (multi-bit) “a priori” information between a detector and a decoder. The detector receives modulation symbols, performs a detection function that is complementary to the ... 03/22/07 - 20070064830 - Apparatus and method for extending number of antennas in a wireless communication system using multiple antennas An apparatus and method for simultaneously providing service to users each having a different number of antennas in a multiple-antenna wireless communication system are provided. The communication method discloses a BS in a wireless communication system that services a first multiple antenna mode using X transmit antennas and a second ... 03/22/07 - 20070064829 - Method and system for a simplified user group selection scheme with finite-rate channel state information feedback for fdd multiuser mimo downlink transmission Certain embodiments of the invention may be found in a method and system for a simplified user group selection scheme with finite-rate channel state information feedback for frequency division duplex (FDD) multiuser multiple-input-multiple-output (MIMO) downlink transmission. Aspects of the method may include selecting, from a plurality of users, a first ... 03/22/07 - 20070064828 - Method and system for multiple input multiple output (mimo) channel estimation Various aspects of a method for and system for multiple input multiple output (MIMO) channel estimation are presented. Aspects of a method for computing channel estimates in a radio frequency (RF) communications system may comprise decomposing a direct matrix computation into a plurality of constituent matrices, and jointly computing a ... 03/15/07 - 20070058746 - Method for transmitting symbols through at least a communication channel The present invention concerns a method for transmitting symbols through at least a channel in a telecommunication system including at least one transmitter (10) provided with at least two transmitting antennas (Antt 1, Antt 2) and at least one receiver provided with at least one receiving antenna (Antr 1), the ... 03/08/07 - 20070053461 - Receiving method and receiving apparatus, and communication system utilizing the same A timing synchronization detects a temporary timing in a manner such that the presence of a first known signal in the received packet signal is detected by performing correlation processing on the first known signal in the received packet signal. The timing synchronization detects a timing in a manner that ... 03/08/07 - 20070053460 - Coding in a mimo communication system A method of receiving information includes receiving a vector of signal values for a transmitted codeword in antennas of a MIMO receiver array in each of a sequence of time slots. Each vector forms one row of a matrix Y. Each antenna receives the signal values of one column of ... 03/01/07 - 20070047666 - Preamble formats supporting high-throughput mimo wlan and auto-detection A method for generating a preamble of an Orthogonal Frequency Division Multiplexed (OFDM) data frame for a multiple input multiple output (MIMO) wireless communication includes determining at least one system condition preamble format parameter. When the system condition preamble format parameter satisfies a first preamble format parameter a preamble having ... 02/22/07 - 20070041467 - Signal detection method for mimo communication system employing spatial multiplexing Disclosed is a signal detection method for a receiver of a Multiple-Input Multiple-Output (MIMO) communication system having nT and nR (where nR is greater than or equal to nT) transmission and reception antennas, respectively, and an nT×nR channel matrix. The signal detection method includes selecting a plurality of sub-channel matrices ... 02/22/07 - 20070041466 - Antenna virtualization in communication systems Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a ... 02/22/07 - 20070041465 - Antenna virtualization in communication systems Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a ... 02/22/07 - 20070041464 - Selective virtual antenna transmission Techniques for transmitting data from virtual antennas instead of physical antennas are described. Each virtual antenna may be mapped to some or all physical antennas by a different mapping. The performance of different sets of at least one virtual antenna is evaluated based on one or more metrics such as ... 02/22/07 - 20070041463 - Superimposed training for multiple antenna communications A training-based transmission technique for multiple-antenna communication systems is disclosed herein where the transmitted symbols are a superposition of the training symbols and the data symbols. ... 02/15/07 - 20070036236 - Interference canceling matched filter (icmf) and related methods An interference cancelling matched filter (ICMF) may include an antenna array for receiving a signal burst including a training sequence therein, and an adaptive space-time filter connected to the virtual antenna array and having settable filter coefficients. The ICMF may further include a channel impulse response estimator for estimating a ... 02/08/07 - 20070030919 - Channel estimation for wireless systems with multiple transmit antennas In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols. ... 02/08/07 - 20070030918 - Secure communication method, transmission apparatus and reception apparatus A transmitting apparatus that transmits signals from a plurality of antennas, and can improve the security of communication compared with a conventional system. In this apparatus, an antenna changing section (105) stores an antenna change pattern in internal memory, and each time a clock signal is input, generates an antenna ... 02/01/07 - 20070025464 - System and method for spatial-multiplexed tropospheric scatter communications A method is described comprising: transmitting a training signal from each antenna of a base station to each of a plurality of client devices utilizing tropospheric scatter, each of the client devices analyzing each training signal to generate channel characterization data, and transmitting the channel characterization data back to the ... 02/01/07 - 20070025463 - Bit parser for interleaver in transmitter with multiple transmit antennas A transmitter having two or more transmit antennas includes a bit parser for providing two or more data streams to an interleaver of the transmitter. The bit parser receives bits representing data to be transmitted over the transmit antennas, and parses the bits into a number of data streams equal ... 01/18/07 - 20070014378 - System and method for mimo equalization for dsp transceivers A method to efficiently deal with FEXT crosstalk in wireline communication system via MIMO equalization is presented. A MIMO-DFE based receiver architecture is developed to demonstrate the advantage over the traditional receiver design. A MIMO structure for systems with TH precoding is also developed for 10GBASE-T application. The proposed architecture ... 01/18/07 - 20070014377 - Data communication with embedded pilot information for timely channel estimation Pilot data and data-bearer data are formed to be mutually orthogonal and in each other's null-space. Data to be transmitted is first modulated with the data-bearer matrix and then pilot data is added thereto. The pilot data may be added to each modulated symbol, thereby increasing significantly the density of ... 01/11/07 - 20070009059 - Efficient computation of spatial filter matrices for steering transmit diversity in a mimo communication system Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case, an initial spatial filter matrix may be derived based on one channel response matrix, ... 01/11/07 - 20070009058 - Method for transmitting data in a mimo communication system Provided is a multiple-input multiple-output (MIMO) data transmission method. A transmitter generates a transmission symbol by adding a parity symbol to a predetermined number of data symbols, generates a preprocessed symbol by multiplying the predetermined number of transmission symbols by a preprocessing matrix in units of blocks, selects a transmission ... 01/04/07 - 20070002963 - Apparatus, method and computer program product providing closed loop transmit antenna operation for systems using multiple antennas A method includes determining weights corresponding to each of a plurality of antennas used to transmit data signals, each weight suitable to modify a corresponding one of the data signals prior to transmission using a corresponding one of the antennas; and transmitting information corresponding to at least one of the ... 01/04/07 - 20070002962 - Space-time and/or space-frequency block coding using complex signal swapping A method of space-time and/or space-frequency block encoding begins by receiving at least two complex signals, wherein each of the at least two complex signals includes a real component and an imaginary component. The method continues, for each of the at least two complex signals, by generating a swapped complex ... 01/04/07 - 20070002961 - System and method of communicating signals A communication system is presented. The system includes one or more transmitters configured to transmit a signal, where each of the signals generated by the one or more transmitters corresponds to a respective frequency. Further, the system includes a plurality of receiver front-ends configured to receive the signal transmitted by ... 12/28/06 - 20060291582 - Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion Techniques to process data for transmission over multiple transmission channels. The available transmission channels are segregated into one or more groups, and the channels in each group are selected for use for data transmission. Data for each group is coded and modulated based on a particular coding and modulation scheme ... 12/28/06 - 20060291581 - High data rate closed loop mimo scheme combining transmit diversity and data multiplexing Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput. ... 12/21/06 - 20060285606 - Quantized power control in multiple antenna communication system A power control design for multiple antenna communication systems is herein disclosed which uses an optimized quantized feedback link between the receiver and the transmitter. ... 12/21/06 - 20060285605 - Coding and modulation for multiple data streams in a communication system Techniques for transmitting multiple data streams to a single receiver using a single code rate and different modulation schemes are described. Channel estimates are determined for the multiple data streams and used to select a single code rate and multiple modulation schemes for the multiple data streams. The system may ... 12/21/06 - 20060285604 - Wireless communication network with extended coverage range A wireless communication network supports 802.11b/g and a range extension mode, which supports at least one data rate lower than the lowest data rate in 802.11b/g. A transmitting station (which may be an access point or a user terminal) includes first and second processors. The first processor performs differential modulation ... 12/14/06 - 20060280257 - Method and apparatus for generating weights for transmit diversity in wireless communication Techniques for generating weights that can provide good performance for transmit diversity are described. A receiver obtains symbols for a data transmission sent from multiple transmit antennas to at least one receive antenna. The receiver also derives channel estimates for a communication channel between the transmit antennas and the receive ... 12/07/06 - 20060274849 - Time-domain transmit and receive processing with channel eigen-mode decomposition for mimo systems Techniques for processing a data transmission at the transmitter and receiver. In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and “water-pouring” results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to ... 12/07/06 - 20060274848 - Method and system of convolutive coding for the transmission of space-time block codes according to the technique termed golden code the set Γ∞, termed “infinite Golden Code”, being a principal ideal of the ring Az as defined by the Golden Code technique. ... 12/07/06 - 20060274847 - Training frames for mimo stations A short sequence of training frames is transmitted from the station A to the station B via the channel in response to receiving the long sequence of training frames. A number of frames in the short training sequence is at least equal to ... 12/07/06 - 20060274846 - Differential multiple-length transmit and reception diversity The present invention achieves differential transmit diversity and related diversity reception schemes transmit symbol constellations which are extended to multiple levels. Heretofore, a group of transmission bits is divided into a first sub-group of transmission bits and a second sub-group of transmission bits. Then, the first sub-group of transmission bits ... 11/23/06 - 20060262874 - Method and apparatus for power control in a multiple antenna system A method and apparatus for use in a CDMA-type or OFDM/OFDMA-based multi-antenna system first selects an initial set of antenna weights and multiplies the selected antenna weights by copies of a transmission signal to produce a weighted transmission signal. In an OFDM/OFDMA-based implementation, a selected set of sub-carriers are modulated ... 11/16/06 - 20060256888 - Multi input multi output wireless communication reception method and apparatus A Multi Input Multi Output (MIMO) Wireless Communication Reception Method and Apparatus are proposed whereby in a 2-way wireless communication system with scattering propagation channels, where several data sub-streams are simultaneously transmitted from a transmitting side to a receiving side, and where no channel information is necessarily available at the ... 11/09/06 - 20060251183 - Method for determining multiple-input multiple-output (mimo) channel coefficient using polarity-inverted training signals in an orthogonal frequency division multiplexed (ofdm) multicarrier system Embodiments of system and method for determining channel coefficients in a wireless network are generally described herein. Other embodiments may be described and claimed. In some embodiments, channel coefficients of a multiple-input multiple-output (MIMO) channel may be determined without interpolation. ... 11/09/06 - 20060251182 - Data communication system A communication system (1) comprises a plurality of at least three transmitters (11, 12, 13, 14). A data signal (S) is provided to all transmitters. Each transmitter transmits data signal fragments (31, 32, 33, 34). The data transmissions by the various transmitters are accurately synchronised, such that, on arrival in ... 11/02/06 - 20060245513 - Method and apparatus for singular value decomposition of a channel matrix A method and apparatus for decomposing a channel matrix in a wireless communication system are disclosed. A channel matrix H is generated for channels between transmit antennas and receive antennas. A Hermitian matrix A=HHH or A=HHH is created. A Jacobi process is cyclically performed on the matrix A to obtain ... 11/02/06 - 20060245512 - Apparatus and method for preventing call failure in an adaptive smart antenna system A transmitter and transmission method for preventing a call failure using a system power value, caused by rapidly increasing transmit power against a large phase mismatch occurring before a phase mismatch correction cycle elapses in a smart-antenna communication system. In the transmitter and transmission method, if the system power value ... 10/26/06 - 20060239375 - Adaptive modulation in a multiple input multiple output wireless communication system with optional beamforming A transmitting MIMO wireless device transmits a training sequence to a receiving MIMO wireless device. The receiving MIMO wireless device estimates a channel response based upon the training sequence, determines an estimated transmitter beamforming unitary matrix and a transmit path quality matrix, and then transmits some/all of these parameters to ... 10/26/06 - 20060239374 - Efficient feedback of channel information in a closed loop beamforming wireless communication system A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then ... 10/26/06 - 20060239373 - Beamforming in a wireless communication with a partial estimation to reduce overhead A method for beamforming in a wireless communication begins by receiving a baseband signal. The method continues by receiving a feedback signal that includes a subset of angles, wherein a set of angles provide polar coordinates for a unitary matrix and wherein the subset of angles is a subset of ... 10/26/06 - 20060239372 - Reduced feedback for beamforming in a wireless communication A method for reduced feedback for beamforming in a wireless communication begins by receiving a baseband signal. The method continues by digitally beamforming the baseband signal using a unitary matrix having polar coordinates. ... 10/19/06 - 20060233277 - Method and apparatus for multi-sector transmission in a wireless communication network According to transmission control as taught herein, a transmission control system is configured for controlling the transmission of data via two or more data streams to a subscriber in a wireless communication network. In one or more embodiments, the transmission control system comprises a first control circuit to evaluate performance ... 10/19/06 - 20060233276 - Spatial modulation in a wireless communications network A signal (e.g., a UWB signal) is generated that conveys a first information sequence. This generation may employ various modulation techniques, such as OFDM and DSSS. To further convey a second information sequence, this signal is spatially modulated. Then, the signal may be transmitted to a remote device. Accordingly, this ... 10/19/06 - 20060233275 - Distributed transmit diversity in a wireless communication network A wireless communication network is configured to provide distributed diversity transmissions, wherein different diversity-coded versions of the same information signal are transmitted from each of two or more network sectors. The diversity-coded versions of the information signal are based on space-time or space-frequency codes, and the information signal may comprise ... 10/19/06 - 20060233274 - Method for the multiple-antennae emission of a signal by unitary space-time codes, receiving method, and corresponding signal An embodiment of the invention relates to a method for sending a signal formed by successive vectors each comprising N symbols to be sent, and implementing at least two transmitter antennas. A distinct sub-matrix is associated with each of said antennas, said sub-matrices being obtained by subdivision of a unitary ... 10/12/06 - 20060227893 - Method and/or system for estimating phase noise error Embodiments of methods and/or systems for estimating phase error noise are disclosed. ... 10/12/06 - 20060227892 - Interleaver and parser for ofdm mimo systems A MIMO wireless system includes a transmitter that has a transmitter having a parser that parses a bit stream into multiple spatial data streams and multiple interleavers corresponding to the multiple spatial data streams, where each interleaver interleaves the bits in the corresponding spatial data stream by performing multiple column ... 10/12/06 - 20060227891 - Method of channel estimation for mimo-ofdm using phase rotated low overhead preamble A low overhead long preamble and the corresponding channel estimator for MIMO-OFDM systems that are backward compatible with current 802.11a systems. The preamble has a first training sequence and a second training sequence, wherein the second training sequence is a phase rotation of the first training sequence. The first training ... 10/05/06 - 20060222101 - Method and apparatus for an adaptive multiple-input multiple-output (mimo) wireless communications systems An adaptive MIMO communications system includes a multifunctional reconfigurable antenna with a selectively alterable effective physical antenna array configuration and radiation/polarization properties, which configuration and properties is a component in the optimization of the adaptive system parameters. The multifunctional reconfigurable antenna comprises a plurality of antenna components and a plurality ... 10/05/06 - 20060222100 - Multiple band multiple input multiple output transceiver integrated circuit A MIMO transceiver integrated circuit (IC) includes a plurality of multiple band direct conversion transmitter sections, a plurality of multiple band direct conversion receiver sections, and a local oscillation generation module. Each of the plurality of multiple band direct conversion transmitter sections includes a transmit baseband module and a multiple ... 09/28/06 - 20060215781 - Method for detecting and decoding a signal in a mimo communication system A method for detecting and decoding a signal in a communication system based on Multiple-Input Multiple-Output (MIMO)-Orthogonal Frequency Division Multiplexing (OFDM). A signal is received through multiple receive antennas. A decision error occurring at a symbol decision time is considered and a symbol is detected from transmitted symbols. Original data ... 09/21/06 - 20060209980 - Beam and power allocation method for mimo communication system The present invention provides the multiuser Multiple-Input Multiple-Output (MIMO) systems with a feedback method which includes measuring, at the terminal, received Signal to Noise Ratios (SNRs) for all transmit antennas, selecting one of precoding matrixes, which has best SNRs, retrieving an index mapped to the selected preceding matrix from a ... 09/21/06 - 20060209979 - Frequency offset tracking The present invention relates to estimating and correcting for frequency offset errors in wireless receivers, and is particularly but not exclusively related to MIMO WLAN applications. The present invention provides an improved method of tracking receiver frequency offsets in a receiver for MIMO systems. These receiver based frequency offset components ... 09/21/06 - 20060209978 - Indoor radio transmission method for parallel radio transmission of digital data substreams and a mobile radio transmission system A radio transmission method and a wireless transmission system comprising multiple transmitter and receiver antennae simultaneously operating within the same frequency range and space-time encoders and decoders. Data transmission and channel matrix measurement can take place synchronously. Characteristic pilot signals that are unequivocally recognizable are superimposed with low noise on ... 09/14/06 - 20060203928 - Apparatus for decoding quasi-orthogonal space-time block codes An efficient decoding scheme of a receiver in a wireless communication system including a transmitter for encoding data into quasi-orthogonal space-time block codes (STBCs) and transmitting the STBCs through a plurality of transmit antennas using fading channels, and a receiver for receiving data through a plurality of receive antennas. In ... 09/07/06 - 20060198462 - Method for encoding a message using diagonally weighted space-time trellis code depending on bit feedback Disclosed is a method for encoding messages with space-time trellis codes(STTC) and transmitting the encoded messages in communication system provided with at least two transmit antennas and at least one receive antenna. The method comprising generating a codeword by encoding message using STTC; generating a modified codeword by multiplying the ... 09/07/06 - 20060198461 - Wireless data communication system and wireless data communication method In MIMO transmission which executes quadrature modulation of M transmission antennas and N reception antennas, a transmission signal vector will be set as a vector having the element number of 2M that comprises the in-phase components and quadrature components of M complex signals, a reception signal vector will be set ... 09/07/06 - 20060198460 - Link adaptation for high throughput multiple antenna wlan systems A wireless device 148 that performs link adaptation is disclosed. The wireless device 148 comprises at least two antennas 101a, 120a and 101b, 120b, and a network interface logic operable to select transmission parameters based on a packet error rate 154 and on at least one signal to noise ratio ... 09/07/06 - 20060198459 - Nonlinear precoding method for a digital broadcast channel Several subscriber signals are transmitted simultaneously and at the same frequency by a central transmitter to several decentralized receivers which do not cooperate with each other, by digital message transmission in a broadcast channel. A common transmission signal, which enables an error-free individual reception, should be generated with knowledge of ... 08/31/06 - 20060193396 - Communication system modulating/demodulating data using antenna patterns and associated methods A wireless communication system includes a transmitter comprising a serial-to-parallel converter for converting serial data bits to a parallel bit stream, a signal mapper coupled to the serial-to-parallel converter and an antenna selector coupled to the serial-to-parallel converter. The signal mapper receives as input a first group of bits from ... 08/24/06 - 20060188036 - Method for transmitting uniformly distributed data in a mimo telecommunication system sequence allocation ALS for forming groups G1, G2 of Nt permutated bit sequences Psqj intended to be transmitted through Nt channels allocated to a same bit rank for all transmitting antennas. The invention ensures an essentially homogeneous distribution of the encoded data bits over the different channel inputs, and thus ... 08/17/06 - 20060182196 - Method for link adaptation Systems and methods for optimizing transmission of a plurality of data streams on a multiple-input multiple-output channel are described. The systems and methods for optimizing reduce the multiple-input multiple-output channel for each transmission scheme to an equivalent single-input single-output channel for the transmission scheme and transmit the plurality of data ... 08/17/06 - 20060182195 - Separate fec decoding and iterative diversity reception Methods, apparatuses, and systems are presented for deriving data from an error correction encoded composite signal involving (a) receiving a composite signal comprising contributions from a plurality of individual signals transmitted over different paths representing a common data sequence encoded using an error correction code, (b) calculating soft values of ... 08/17/06 - 20060182194 - Integrated fec decoding and iterative diversity reception Methods, apparatuses, and systems are presented for deriving data from an error correction encoded composite signal involving (a) receiving a composite signal comprising contributions from a plurality of individual signals transmitted over different paths representing a common data sequence encoded using an error correction code, (b) calculating soft values of ... 08/17/06 - 20060182193 - Technique for adaptive equalization in band-limited high data rate communication over fading dispersive channels In high data rate communication applications where digital data information is error-corrected coded and interleaved and transmitted with spectral limitations over fading dispersive channels, a method and receiver is described that incorporates channel estimation and decision-feedback equalization. Channel estimation is accomplished within a receiver time block with locally generated reference ... 08/17/06 - 20060182192 - Wireless communication system, wireless communication apparatus, wireless communication method, and computer program Disclosed is a wireless communication system which carries out spatial multiplexing communication forming multiple spatial channels between a pair of a transmitter with multiple antennas and a receiver with multiple antennas, having the transmitter and the receiver. In the system, the multiple spatial channels are divided into one or more ... 08/17/06 - 20060182191 - Selection of training sequences for multiple-in multiple-out transmissions A cellular communication system comprises a Multiple-In Multiple-Out, MIMO, transmitter (101) and receiver (103). The MIMO transmitter (101) comprises a message generator (303) for generating MIMO messages comprising selected training sequences and transceivers (305, 307, 309) transmitting the messages on a plurality of antennas (311, 313, 315). The training sequences ... 08/10/06 - 20060176974 - Radio communications device with adaptive combination To reduce costs in multiple-input multiple-output (MIMO) and other wireless communication systems an arrangement is described whereby adaptive combination is used at user equipment in order to produce two or more directional antenna beams. Improvements in carrier to interference levels result. ... 08/10/06 - 20060176973 - Vertical adaptive antenna array for a discrete multitone spread spectrum communications system Two or more antenna elements are arranged in the vertical direction to give vertical spatial adaptivity to a wireless discrete multitone spread spectrum communications system. The system is based on a combination of Discrete Multitone Spread Spectrum (DMT-SS) and multi-element adaptive antenna array technologies. This enables the automatic positioning of ... 08/10/06 - 20060176972 - Method and system for optional closed loop mechanism with adaptive modulations for multiple input multiple output (mimo) wireless local area network (wlan) system Aspects of a method and system for an optional closed loop mechanism with adaptive modulations for a multiple input multiple output (MIMO) WLAN system are provided. One aspect of the system may comprise a receiver that may select, for a plurality of spatial streams, a modulation type and/or coding rate. ... 08/10/06 - 20060176971 - Multi input multi output wireless communication reception method and apparatus A Multi Input Multi Output (MIMO) Wireless Communication Reception Method and Apparatus are proposed whereby in a 2-way wireless communication system with scattering propagation channels, where several data sub-streams are simultaneously transmitted from a transmitting side to a receiving side, and where no channel information is necessarily available at the ... 08/10/06 - 20060176970 - Smart antenna solution for mobile handset A mobile terminal with smart antennas, comprises a plurality of groups of radio frequency signal processing modules (300), for transforming received multi-channel radio frequency signals to multi- channel baseband signals; a smart antenna processing module (306), for smart antenna baseband processing said multi-channel baseband signals output from said plurality of ... 08/03/06 - 20060171483 - Decoder for a multiplexed transmission system Information is decoded from a signal received from a transmission over a MIMO channel from a plurality of transmit antennas, by means of a decoder and a corresponding decoding method. The signal is received on a plurality of receive antennas, and the information is encoded as a string of symbols ... 08/03/06 - 20060171482 - Initiation of a mimo communication The present invention provides a method and apparatus for initiating a multiple input multiple output (MIMO) communication. The method and apparatus includes processing that begins by transmitting a frame formatted in accordance with a default MIMO active transmitter-receiver antenna configuration to a target receiver. The processing continues by receiving at ... 08/03/06 - 20060171481 - Method and apparatus for constructing mimo constellations that preserve their geometric shape in fading channels A method and related system of constructing multidimensional constellations whose shape remains invariant despite multiplicative distortions inherent to fading channels, and which provide a means for introducing coding redundancy to a signal without affecting the spectral efficiency of that signal is provided. Specifically, a method is provided for expanding multidimensional ... 07/27/06 - 20060165192 - Wireless communication system, receiver, demodulation method used for the system and receiver, and program thereof In a wireless communication system having a receiver which receives, through plural reception antennae, signals transmitted from plural transmission antennae, bit likelihood can be surely calculated without requiring a selection processing. A transmitter has M transmission antennae, and transmits signals through the transmission antennae, respectively. A receiver has N reception ... 07/27/06 - 20060165191 - Mimo channel feedback protocols Handshaking protocols, techniques, and structures are presented for use in implementing closed loop MIMO using explicit feedback in a wireless network. ... 07/20/06 - 20060159196 - Apparatus and method for channel estimation and cyclic prefix reconstruction in an ofdm-stbc mobile communication system An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second received symbol sequences. A cyclicity restorer cancels ICI signal components from the ISI-cancelled first received symbol sequence and the ISI-cancelled second ... 07/20/06 - 20060159195 - Apparatus using concatenations of signal-space codes for jointly encoding across multiple transmit antennas, and employing coordinate interleaving A system for transmitting data over a MIMO channel has a transmitter and a receiver. In the transmitter, the input data is encoded over at least two pipes by a concatenation of at least two constituent signal-space encoders. Each constituent encoder is used to generate, in response to the input ... 07/20/06 - 20060159194 - Scalable pre-channel estimate phase corrector, method of correction and mimo communication system employing the corrector and method The present invention provides a pre-channel estimate phase corrector for use with a multiple-input, multiple-output (MIMO) receiver employing M receive antennas, where M is at least two. In one embodiment, the pre-channel estimate phase corrector includes a training sequence coordinator configured to receive a pattern of training sequences from the ... 07/13/06 - 20060153312 - Apparatus and method for space-time frequency block coding in a wireless communication system A Space-Time-Frequency Block Coding (STFBC) encoding apparatus and method for a wireless communication system are provided. In a transmitter using a plurality of transmit antennas, an encoder encodes an input symbol sequence according to a predetermined space-time coding matrix. An antenna circulator selects one of predetermined permutation matrices according to ... 07/06/06 - 20060146953 - Method and apparatus for estimating transmit weights for multiple antennas An approach for determining antenna weights in a multiple antenna communication system is provided. The approach jointly optimizes the transmitter weights and the receiver filter. A filter of a receiver (e.g., Linear Minimum Mean Square Error (LMMSE)) is optimized using initial weight values of the transmit antennas. The cost function, ... 07/06/06 - 20060146952 - Scalable post-channel estimate phase corrector, method of correction and mimo communication system empolying the corrector and method The present invention provides a post-channel estimate phase corrector for use with a multiple-input, multiple-output (MIMO) receiver employing M receive antennas, M being at least two. In one embodiment, the post-channel estimate phase corrector includes a pilot sequence coordinator configured to receive a pattern of pilot sequences from the M ... 07/06/06 - 20060146951 - System and method of processing frequency-diversity coded signals with low sampling rate A system and method of processing frequency-diversity coded signals with a low sampling rate less than the Nyquist rate for ultra-wideband devices are described. The frequency-diversity coding system comprises a frequency-diversity encoder, one or more first tran |