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41.发明授权Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system 有权用于无线通信系统的空时和空频发射分集方案的空间扩展公开(公告)号：US07894548B2
公开(公告)日：2011-02-22
申请号：US11217818
申请日：2005-09-01
IPC分类号： H04L27/04
CPC分类号： H04L1/0668 , H04B7/0615 , H04B7/0617 , H04B7/0667 , H04B7/0678 , H04B7/068 , H04B7/0689 , H04B7/0697 , H04B7/12 , H04J13/004 , H04L1/0041 , H04L1/0606 , H04L1/0625 , H04L1/0637 , H04L5/0023 , H04L27/2626
摘要： Techniques for transmitting data using a combination of transmit diversity schemes are described. These transmit diversity schemes include spatial spreading, continuous beamforming, cyclic delay diversity, space-time transmit diversity (STTD), space-frequency transmit diversity (SFTD), and orthogonal transmit diversity (OTD). A transmitting entity processes one or more (ND) data symbol streams based on a transmit diversity scheme (e.g., STTD, SFTD, or OTD) to generate multiple (NC) coded symbol streams. Each data symbol stream may be sent as a single coded symbol stream or as multiple (e.g., two) coded symbol streams using STTD, SFTD, or OTD. The transmitting entity may perform spatial spreading on the NC coded symbol streams with different matrices to generate multiple (NT) transmit symbol streams for transmission from NT antennas. Additionally or alternatively, the transmitting entity may perform continuous beamforming on the NT transmit symbol streams in either the time domain or the frequency domain.
摘要翻译： 描述了使用发射分集方案的组合来发送数据的技术。 这些发射分集方案包括空间扩展，连续波束成形，循环延迟分集，时空发射分集（STTD），空频发射分集（SFTD）和正交发射分集（OTD）。 发送实体基于发射分集方案（例如，STTD，SFTD或OTD）处理一个或多个（ND）数据符号流，以生成多个（NC）编码符号流。 每个数据符号流可以作为单个编码符号流或使用STTD，SFTD或OTD作为多个（例如，两个）编码符号流发送。 发送实体可以对具有不同矩阵的NC编码符号流执行空间扩展，以生成用于从NT个天线发送的多个（NT）个发送符号流。 附加地或替代地，发射实体可以在时域或频域中的NT个发射符号流上执行连续波束成形。
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42.发明授权Frequency-independent spatial processing for wideband MISO and MIMO systems 有权用于宽带MISO和MIMO系统的频率独立空间处理公开(公告)号：US07894538B2
公开(公告)日：2011-02-22
申请号：US11471415
申请日：2006-06-19
IPC分类号： H04L27/04
CPC分类号： H04L1/0002 , H04B7/0417 , H04B7/0617 , H04L25/0206 , H04L25/0212 , H04L25/0242 , H04L27/2647
摘要： Frequency-independent eigensteering in MISO and MIMO systems are described. For principal mode and multi-mode eigensteering, a correlation matrix is computed for a MIMO channel based on channel response matrices and decomposed to obtain NS frequency-independent steering vectors for NS spatial channels of the MIMO channel. ND data symbol streams are transmitted on ND best spatial channels using ND steering vectors, where ND=1 for principal mode eigensteering and ND>1 for multi-mode eigensteering. For main path eigensteering, a data symbol stream is transmitted on the best spatial channel for the main propagation path (e.g., with the highest energy) of the MIMO channel. For receiver eigensteering, a data symbol stream is steered toward a receive antenna based on a steering vector obtained for that receive antenna. For all eigensteering schemes, a matched filter is derived for each receive antenna based on the steering vector(s) and channel response vectors for the receive antenna.
摘要翻译： 描述MISO和MIMO系统中与频率无关的本征导向。 对于主模式和多模式特征向导，基于信道响应矩阵为MIMO信道计算相关矩阵，并对其进行分解，以获得用于MIMO信道的NS空间信道的NS频率无关导向向量。 ND数据符号流使用ND导向矢量在ND最佳空间信道上传输，其中主模式特征导向的ND = 1，多模式特征转向的ND> 1。 对于主路径特征导向，在用于主要传播路径（例如，具有最高能量）的MIMO信道的最佳空间信道上发送数据符号流。 对于接收机本征导向，基于为该接收天线获得的导向向量，将数据符号流转向接收天线。 对于所有特征导向方案，基于接收天线的导向矢量和信道响应向量，为每个接收天线导出匹配滤波器。
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43.发明申请公开(公告)号：US20100215115A1
公开(公告)日：2010-08-26
申请号：US12773722
申请日：2010-05-04
IPC分类号： H04B7/02
CPC分类号： H04B7/0417 , H04B7/0854 , H04L1/0002 , H04L1/0003 , H04L1/0009 , H04L1/06 , H04L25/0206 , H04L27/2601
摘要： For eigenmode transmission with minimum mean square error (MMSE) receiver spatial processing, a transmitter performs spatial processing on NS data symbol streams with steering vectors to transmit the streams on NS spatial channels of a MIMO channel. The steering vectors are estimates of transmitter steering vectors required to orthogonalize the spatial channels. A receiver derives a spatial filter based on an MMSE criterion and with an estimate of the MIMO channel response and the steering vectors. The receiver (1) obtains NR received symbol streams from NR receive antennas, (2) performs spatial processing on the received symbol streams with the spatial filter to obtain NS filtered symbol streams, (3) performs signal scaling on the filtered symbol streams with a scaling matrix to obtain NS recovered symbol streams, and (4) processes the NS recovered symbol streams to obtain NS decoded data streams for the NS data streams sent by the transmitter.
摘要翻译： 对于具有最小均方误差（MMSE）接收机空间处理的本征模式传输，发射机对具有导航向量的NS数据符号流执行空间处理，以在MIMO信道的NS空间信道上发送流。 导向矢量是使空间通道正交化所需的发射机导向矢量的估计。 接收机基于MMSE准则和MIMO信道响应和导向向量的估计导出空间滤波器。 接收机（1）从NR个接收天线获得NR个接收到的符号流，（2）利用空间滤波器对接收到的符号流进行空间处理，以获得NS滤波的符号流，（3）用滤波符号流执行信号缩放， 缩放矩阵以获得NS恢复的符号流，以及（4）处理NS恢复的符号流，以获得由发送器发送的NS数据流的NS解码数据流。
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公开(公告)号：US20080285669A1
公开(公告)日：2008-11-20
申请号：US12112789
申请日：2008-04-30
IPC分类号： H04K1/10
CPC分类号： H04L5/0048 , H04B7/022 , H04B7/0421 , H04B7/043 , H04B7/0443 , H04B7/0669 , H04B7/0689 , H04B7/0697 , H04B7/0854 , H04B7/0871 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/0025 , H04L1/0059 , H04L1/0061 , H04L1/0069 , H04L1/0071 , H04L1/0606 , H04L1/0625 , H04L1/0656 , H04L1/08 , H04L1/16 , H04L1/1887 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L27/2602 , H04L27/2607 , H04L27/2647 , H04L2025/03414 , H04L2025/03426 , H04W28/20 , H04W28/22 , H04W52/42 , H04W52/50 , H04W72/12 , H04W84/12
摘要： A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration.
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公开(公告)号：US07346115B2
公开(公告)日：2008-03-18
申请号：US10830907
申请日：2004-04-22
CPC分类号： H04B7/0615 , H04B7/0413
摘要： A matrix {circumflex over (V)} of eigenvectors is derived using an iterative procedure. For the procedure, an eigenmode matrix Vi is first initialized, e.g., to an identity matrix. The eigenmode matrix Vi is then updated based on a channel response matrix Ĥ for a MIMO channel to obtain an updated eigenmode matrix Vi+1. The eigenmode matrix may be updated for a fixed or variable number of iterations. The columns of the updated eigenmode matrix may be orthogonalized periodically to improve performance and ensure stability of the iterative procedure. In one embodiment, after completion of all iterations, the updated eigenmode matrix for the last iteration is provided as the matrix {circumflex over (V)}.
摘要翻译： 使用迭代过程导出特征向量的矩阵 V。 对于该过程，本征模式矩阵 V I i首先被初始化，例如，到单位矩阵。 然后，基于MIMO信道的信道响应矩阵 H更新本征模式矩阵 V i，以获得更新的本征模式矩阵 V i + 1 。 可以针对固定或可变数量的迭代更新本征模式矩阵。 更新的本征模式矩阵的列可以周期性地正交化以提高性能并确保迭代过程的稳定性。 在一个实施例中，在完成所有迭代之后，最后迭代的更新的本征模式矩阵被提供为矩阵 V。
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46.发明授权公开(公告)号：US07336746B2
公开(公告)日：2008-02-26
申请号：US11683736
申请日：2007-03-08
IPC分类号： H04B7/10
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。
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公开(公告)号：US07298805B2
公开(公告)日：2007-11-20
申请号：US10719802
申请日：2003-11-21
IPC分类号： H04L1/02
CPC分类号： H04B7/043 , H04B1/71072 , H04B7/0408 , H04B7/0413 , H04B7/0421 , H04B7/0617 , H04B7/0619 , H04B7/0697 , H04B17/309 , H04L5/023 , H04W16/28
摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.
摘要翻译： 获得每个终端的上行链路信道响应矩阵，并对其进行分解，得到终端在上行链路上使用的导向矢量。 基于其导向矢量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合（例如具有最高总吞吐量）。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 接入点根据接收机空间处理技术对其接收到的符号流执行接收机空间处理，以恢复由所选终端发送的数据符号流。
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公开(公告)号：US09312935B2
公开(公告)日：2016-04-12
申请号：US13155916
申请日：2011-06-08
IPC分类号： H04B7/02 , H04B7/04 , H04B7/06 , H04B7/08 , H04L1/00 , H04L1/06 , H04L1/08 , H04L25/02 , H04L25/03 , H04L1/16 , H04L5/00 , H04L27/26 , H04L27/00 , H04W16/28 , H04W28/20 , H04W52/50
CPC分类号： H04B7/0421 , H04B7/043 , H04B7/0615 , H04B7/0669 , H04B7/0684 , H04B7/0697 , H04B7/0854 , H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/0071 , H04L1/0618 , H04L1/08 , H04L1/16 , H04L5/0023 , H04L5/0026 , H04L5/0048 , H04L5/005 , H04L5/006 , H04L25/0204 , H04L25/0226 , H04L25/03343 , H04L27/2613 , H04L2027/0089 , H04W16/28 , H04W28/20 , H04W52/50
摘要： Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot.
摘要翻译： 描述适用于MIMO系统并能够支持各种功能的飞行员。 各种类型的导频包括信标导频，MIMO导频，导向参考或导向导频，以及载波导频。 信标导频从所有发射天线发射，并可用于定时和频率采集。 MIMO导频是从所有发射天线发射的，但由分配给发射天线的不同正交码覆盖。 MIMO导频可以用于信道估计。 引导参考在MIMO信道的特定本征模式上发送，并且是用户终端特定的。 转向参考可用于信道估计。 载波导频可以在指定的子带/天线上发射，并且可以用于载波信号的相位跟踪。 可以基于这些各种类型的飞行员的不同组合来设计各种导频传输方案。
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公开(公告)号：US08543070B2
公开(公告)日：2013-09-24
申请号：US11481705
申请日：2006-07-05
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。
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50.发明授权公开(公告)号：US08325844B2
公开(公告)日：2012-12-04
申请号：US12815870
申请日：2010-06-15
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。
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