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21. 发明授权

US07895503B2 Sphere detection and rate selection for a MIMO transmission 有权
标题翻译：用于MIMO传输的球体检测和速率选择
公开(公告)号：US07895503B2
公开(公告)日：2011-02-22
申请号：US11349367
申请日：2006-02-06
申请人： Jay Rodney Walton , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , Mark S. Wallace , Steven J. Howard
IPC分类号： H03M13/00
CPC分类号： H04L1/06 , H04L1/0631 , H04L25/03242 , H04L25/03292
摘要： Techniques for performing sphere detection to recover data symbols sent in a MIMO transmission are described. In an aspect, sphere detection is performed for data symbols generated with at least two modulation schemes. In another aspect, sphere detection is performed for the data symbols in an order determined based on at least one attribute of the data symbols, which may be error probabilities, modulation schemes, and/or link margins for the data symbols. In yet another aspect, rates for multiple data streams detected with sphere detection are selected based on channel state information. Signal qualities of the data streams may be estimated based on the channel state information, e.g., (1) an upper triangular matrix used for sphere detection and/or (2) an assumption that interference from data streams already detected is canceled. The rates for the data streams may be selected based on the estimated signal qualities.
摘要翻译：描述了用于执行球体检测以恢复在MIMO传输中发送的数据符号的技术。在一个方面，对用至少两个调制方案产生的数据符号执行球体检测。在另一方面，以数据符号的至少一个属性确定的顺序对数据符号执行球体检测，数据符号可以是数据符号的错误概率，调制方案和/或链接余量。在另一方面，基于信道状态信息选择用球检测检测的多个数据流的速率。可以基于信道状态信息来估计数据流的信号质量，例如（1）用于球体检测的上三角矩阵和/或（2）已经检测到的来自数据流的干扰被消除的假设。可以基于估计的信号质量来选择数据流的速率。

22. 发明授权

US07653142B2 Channel estimation and spatial processing for TDD MIMO systems 有权
标题翻译： TDD MIMO系统的信道估计和空间处理
公开(公告)号：US07653142B2
公开(公告)日：2010-01-26
申请号：US11610351
申请日：2006-12-13
申请人： John W. Ketchum , Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
发明人： John W. Ketchum , Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
IPC分类号： H04L1/02 , H04L27/00
CPC分类号： H04L27/261 , H04B7/0413 , H04B7/0421 , H04B7/0615 , H04B7/0619 , H04B7/0669 , H04B7/0697 , H04B7/0854 , H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L25/0224 , H04L25/0226 , H04L25/0242 , H04L25/03343 , H04L27/2601 , H04L27/2602 , H04L27/2647 , H04W16/28 , H04W52/50
摘要： Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/receive chains at the access point and user terminal. During normal operation, a MIMO pilot is transmitted on a first link and used to derive an estimate of the first link channel response, which is decomposed to obtain a diagonal matrix of singular values and a first unitary matrix containing both left eigenvectors of the first link and right eigenvectors of a second link. A steered reference is transmitted on the second link using the eigenvectors in the first unitary matrix, and is processed to obtain the diagonal matrix and a second unitary matrix containing both left eigenvectors of the second link and right eigenvectors of the first link. Each unitary matrix may be used to perform spatial processing for data transmission/reception via both links.
摘要翻译： TDD MIMO系统的信道估计和空间处理。可以执行校准以解决在接入点和用户终端处的发送/接收链的响应的差异。在正常操作期间，在第一链路上发送MIMO导频，并用于导出第一链路信道响应的估计，其被分解以获得奇异值的对角矩阵，以及包含第一链路的左特征向量的第一酉矩阵和第二个链接的右特征向量。使用第一单位矩阵中的特征向量在第二链路上传送转向参考，并且被处理以获得对角矩阵和包含第二链路的左特征向量和第一链路的右特征向量的第二单元矩阵。每个单一矩阵可以用于经由两个链路进行数据发送/接收的空间处理。

23. 发明申请

US20090290657A1 Continuous Beamforming for a MIMO-OFDM System 有权
标题翻译： MIMO-OFDM系统的连续波束成形
公开(公告)号：US20090290657A1
公开(公告)日：2009-11-26
申请号：US12533765
申请日：2009-07-31
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0617 , H04B7/0408 , H04B7/0417 , H04B7/0626 , H04B7/0671
摘要： A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.
摘要翻译：发送实体对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理，以获得子带的空间处理符号。数据符号可以在具有本征模式矩阵的正交空间信道上，在具有导引矩阵的不同空间信道上，或者从具有单位矩阵的不同发射天线发送。在从多个发射天线的发射之前，发射实体在频域或时域中进一步对空间处理的符号执行波束成形。接收实体执行补充处理以恢复由发送实体发送的数据符号。接收实体可以基于该子带的MIMO信道响应矩阵为每个子带导出空间滤波器矩阵，并且对于具有空间滤波器矩阵的子带执行接收机空间处理。

24. 发明申请

US20070249296A1 Reduced complexity beam-steered MIMO OFDM system 有权
标题翻译：降低复杂度的波束控制MIMO OFDM系统
公开(公告)号：US20070249296A1
公开(公告)日：2007-10-25
申请号：US11481705
申请日：2006-07-05
申请人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Jay Rodney Walton
发明人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Jay Rodney Walton
IPC分类号： H04B7/00 , H04B1/02 , H04M1/00
CPC分类号： H04B7/0421 , H04B7/0634 , H04B7/0639 , H04B7/066 , H04L5/0023 , H04L5/0048 , H04L25/0248 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for transmitting data using channel information for a subset of all subcarriers used for data transmission are described. A transmitter station receives channel information for at least one subcarrier that is a subset of multiple subcarriers used for data transmission. The channel information may include at least one transmit steering matrix, at least one set of eigenvectors, at least one channel response matrix, at least one channel covariance matrix, an unsteered pilot, or a steered pilot for the at least one subcarrier. The transmitter station obtains at least one transmit steering matrix for the at least one subcarrier from the channel information and determines a transmit steering matrix for each of the multiple subcarriers. The transmitter station performs transmit steering or beam-steering for each of the multiple subcarriers with the transmit steering matrix for that subcarrier.
摘要翻译：描述了使用用于数据传输的所有子载波的子集的信道信息来发送数据的技术。发射机站接收作为用于数据传输的多个子载波的子集的至少一个子载波的信道信息。信道信息可以包括至少一个发射导向矩阵，至少一组特征向量，至少一个信道响应矩阵，至少一个信道协方差矩阵，非导向导频或用于所述至少一个子载波的导频导频。发射机站从信道信息中获取至少一个子载波的至少一个发射导向矩阵，并确定多个子载波中的每一个的发射导向矩阵。发射台使用该子载波的发射导向矩阵对多个子载波中的每一个进行发射导向或波束导向。

25. 发明授权

US07194042B2 Data transmission with spatial spreading in a mimo communication system 有权
标题翻译：在mimo通信系统中具有空间扩展的数据传输
公开(公告)号：US07194042B2
公开(公告)日：2007-03-20
申请号：US11009200
申请日：2004-12-09
申请人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/02
CPC分类号： H04J11/003 , C07K2317/22 , C07K2317/622 , H04B7/0417 , H04B7/0626 , H04L1/0026 , H04L1/06
摘要： 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 streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.
摘要翻译：对于具有空间扩展的数据传输，发送实体（1）对每个数据分组进行编码和调制，以获得相应的数据符号块，（2）将数据符号块复用到N个S / S数据符号流上以便传输（3）用导向矩阵空间扩展N S S个数据符号流，并且（4）空间地处理N S S个数据符号流， / SUB>扩展符号流，用于N信道本征模式上的全CSI传输或MIMO信道的N SUB空间信道上的部分CSI传输。接收实体（1）通过N个N个接收天线获得接收到的N N个符号流，（2）执行用于全CSI或部分CSI传输的接收机空间处理，以获得（3）使用发送实体使用的相同导向矩阵空间地解扩N N S S个检测到的符号流，以获得N N个S＆lt; S＆lt; S＆lt; （4）对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。

26. 发明授权

US08923785B2 Continuous beamforming for a MIMO-OFDM system 有权
公开(公告)号：US08923785B2
公开(公告)日：2014-12-30
申请号：US11050897
申请日：2005-02-03
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B7/02 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0617 , H04B7/0408 , H04B7/0417 , H04B7/0626 , H04B7/0671
摘要： A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.

27. 发明授权

US08543070B2 Reduced complexity beam-steered MIMO OFDM system 有权
标题翻译：降低复杂度的波束控制MIMO OFDM系统
公开(公告)号：US08543070B2
公开(公告)日：2013-09-24
申请号：US11481705
申请日：2006-07-05
申请人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Jay Rodney Walton
发明人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Jay Rodney Walton
IPC分类号： H03C7/02 , H04M1/00 , H04B1/00 , H04B7/208 , H04B15/00
CPC分类号： H04B7/0421 , H04B7/0634 , H04B7/0639 , H04B7/066 , H04L5/0023 , H04L5/0048 , H04L25/0248 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for transmitting data using channel information for a subset of all subcarriers used for data transmission are described. A transmitter station receives channel information for at least one subcarrier that is a subset of multiple subcarriers used for data transmission. The channel information may include at least one transmit steering matrix, at least one set of eigenvectors, at least one channel response matrix, at least one channel covariance matrix, an unsteered pilot, or a steered pilot for the at least one subcarrier. The transmitter station obtains at least one transmit steering matrix for the at least one subcarrier from the channel information and determines a transmit steering matrix for each of the multiple subcarriers. The transmitter station performs transmit steering or beam-steering for each of the multiple subcarriers with the transmit steering matrix for that subcarrier.
摘要翻译：描述了使用用于数据传输的所有子载波的子集的信道信息来发送数据的技术。发射机站接收作为用于数据传输的多个子载波的子集的至少一个子载波的信道信息。信道信息可以包括至少一个发射导向矩阵，至少一组特征向量，至少一个信道响应矩阵，至少一个信道协方差矩阵，非导向导频或用于所述至少一个子载波的导频导频。发射机站从信道信息中获取至少一个子载波的至少一个发射导向矩阵，并确定多个子载波中的每一个的发射导向矩阵。发射台使用该子载波的发射导向矩阵对多个子载波中的每一个进行发射导向或波束导向。

28. 发明授权

US08325844B2 Data transmission with spatial spreading in a MIMO communication system 有权
标题翻译：在MIMO通信系统中具有空间扩展的数据传输
公开(公告)号：US08325844B2
公开(公告)日：2012-12-04
申请号：US12815870
申请日：2010-06-15
申请人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0678 , H04L1/0002 , H04L1/0003 , H04L1/0009 , H04L5/0023 , H04L25/0224
摘要： 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 streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.
摘要翻译：对于具有空间扩展的数据传输，发送实体（1）对每个数据分组进行编码和调制以获得对应的数据符号块，（2）将数据符号块复用到NS数据符号流上，以在MIMO信道的NS传输信道上传输，（3）用导向矩阵空间扩展NS数据符号流，以及（4）在NS信道的NS个空间信道上的NS本征模或部分CSI传输上空间处理用于全CSI传输的NS扩展符号流。接收实体（1）通过NR个接收天线获得NR个接收到的符号流，（2）执行全CSI或部分CSI传输的接收机空间处理，以获得NS检测符号流，（3）空间地解扩NS检测符号流，发送实体使用相同的导向矩阵来获得NS恢复的符号流，以及（4）对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。

29. 发明申请

US20120250788A1 SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 有权
标题翻译：多天线通信系统中的空间传播
公开(公告)号：US20120250788A1
公开(公告)日：2012-10-04
申请号：US13526160
申请日：2012-06-18
申请人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/06
CPC分类号： H04B7/0417 , H04B7/0456 , H04B7/0669 , H04B17/336 , H04L1/06
摘要： Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.
摘要翻译：在多天线系统中执行空间扩展以随机化每个发送的数据符号块的接收实体观察到的有效信道。对于MIMO系统，在发送实体处理（例如，编码，交织和调制）数据以获得要在NM传输跨度中发送的ND数据符号块，其中ND≥1和NM> 1。 ND块被划分为NM数据符号子块，每个传输跨度的一个子块。对于每个子块，选择导向矩阵（例如，以确定性或伪随机方式从一组L个导引矩阵中，其中L> 1）。每个数据符号子块用为该子块选择的导引矩阵进行空间处理，以获得在一个传输范围内经由NT个发射天线进一步处理和传输的发射符号。因此，ND数据符号块用NM导引矩阵进行空间处理，并观察信道的集合。

30. 发明授权

US08081728B2 Method and apparatus for clock correction in MIMO OFDM 有权
标题翻译： MIMO OFDM中的时钟校正方法和装置
公开(公告)号：US08081728B2
公开(公告)日：2011-12-20
申请号：US11734961
申请日：2007-04-13
申请人： Mark S. Wallace , Peter Monsen , Irena Medvedev , Steven J. Howard , Jay Rodney Walton
发明人： Mark S. Wallace , Peter Monsen , Irena Medvedev , Steven J. Howard , Jay Rodney Walton
IPC分类号： H04L7/00 , H03D1/04
CPC分类号： H04L27/0014 , H04L5/0023 , H04L5/0048 , H04L27/261 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L27/2679 , H04L2027/0053 , H04L2027/0067 , H04L2027/0087
摘要： A method of phase correction at a wireless device includes: estimating a phase slope for an OFDM symbol in a data portion of a packet based on an elapsed time from the start of the packet; measuring a residual phase slope from tracking pilots for the OFDM symbol in the data portion of the packet; and adjusting a phase correction based upon the phase slope and the residual phase slope. Apparatus in a wireless device performs the method and machine-readable media carry instructions for carrying out the method.
摘要翻译：一种无线设备的相位校正方法包括：基于从分组开始起的经过时间，估计分组的数据部分中的OFDM符号的相位斜率; 测量分组的数据部分中的OFDM符号的跟踪导频的残留相位斜率; 以及基于相位斜率和残余相位斜率调整相位校正。无线设备中的设备执行方法和机器可读介质携带用于执行该方法的指令。

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