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61. 发明授权

US08320301B2 MIMO WLAN system 有权
标题翻译： MIMO WLAN系统
公开(公告)号：US08320301B2
公开(公告)日：2012-11-27
申请号：US10693419
申请日：2003-10-23
申请人： J. Rodney Walton , Mark S. Wallace , John W. Ketchum , Steven J. Howard
发明人： J. Rodney Walton , Mark S. Wallace , John W. Ketchum , Steven J. Howard
IPC分类号： H04W4/00 , H04L7/02
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.
摘要翻译：采用MIMO，OFDM和TDD的多接入MIMO WLAN系统。系统（1）使用具有多个可配置传输信道的信道结构，（2）支持基于信道条件和用户终端能力可配置的多种速率和传输模式，（3）采用具有多种类型（4）实现速率，定时和功率控制环路，实现系统正常运行，（5）采用随机接入方式进行系统接入，由用户终端，快速确认和快速的资源分配。可以执行校准以考虑接入点和用户终端处的发射/接收链的频率响应的差异。然后可以通过利用下行链路和上行链路的相互性质和校准来简化空间处理。

62. 发明申请

US20120213302A1 MULTI-ANTENNA TRANSMISSION FOR SPATIAL DIVISION MULTIPLE ACCESS 有权
标题翻译：用于空间多路访问的多天线传输
公开(公告)号：US20120213302A1
公开(公告)日：2012-08-23
申请号：US11869547
申请日：2007-10-09
申请人： J. Rodney Walton , John W. Ketchum , John Edward Smee , Mark S. Wallace , Steven J. Howard
发明人： J. Rodney Walton , John W. Ketchum , John Edward Smee , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/02
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。基于其导向向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。

63. 发明授权

US08040965B2 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion 有权
标题翻译：用于在使用选择性信道反演的多信道通信系统中处理用于传输的数据的方法和装置
公开(公告)号：US08040965B2
公开(公告)日：2011-10-18
申请号：US12499951
申请日：2009-07-09
申请人： John W. Ketchum , Steven J. Howard , Jay Rod Walton , Mark S. Wallace , Fuyun Ling
发明人： John W. Ketchum , Steven J. Howard , Jay Rod Walton , Mark S. Wallace , Fuyun Ling
IPC分类号： H04L27/28
CPC分类号： H04W52/346 , H04L1/0009 , H04L1/0068 , H04L1/06 , H04L5/0023 , H04L5/0037 , H04L5/0046 , H04L5/006 , H04L5/06 , H04L25/03343 , H04L2001/0096 , H04W52/24 , H04W52/42
摘要： Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based on a common coding and modulation scheme to provide modulation symbols and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by “inverting” the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power is distributed across only “good” channels. Improved performance is achieved due to the combined benefits of using only the NS best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.
摘要翻译：用于处理数据以在从所有可用传输信道中选择的一组传输信道上进行传输的技术。在一方面，数据处理包括基于公共编码和调制方案的编码数据，以提供调制符号并且基于该信道的特征对每个所选择的信道预先加权调制符号。预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。由于仅使用NS最佳通道并将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的优点，可以实现改进的性能。

64. 发明授权

US07953047B2 Parser for multiple data streams in a communication system 有权
标题翻译：解析器在通信系统中的多个数据流
公开(公告)号：US07953047B2
公开(公告)日：2011-05-31
申请号：US11042921
申请日：2005-01-24
申请人： Mark S. Wallace , John W. Ketchum
发明人： Mark S. Wallace , John W. Ketchum
IPC分类号： H04B7/216 , H04J13/00 , H04J3/07 , H04B3/46
CPC分类号： H04L1/0069 , H04L1/0041 , H04L1/0059
摘要： Techniques to parse data into multiple (M) streams with selectable data rates are described. The modulation scheme and code rate for each stream are determined based on the data rate selected for that stream. The modulation schemes and code rates for all M streams are used to determine a parse cycle and the number of puncture cycles for each stream in the parse cycle. A sequence of puncture cycles is formed for the M streams such that the puncture cycle(s) for each stream are distributed as evenly as possible across the sequence. An encoder encodes traffic data in accordance with a base code (e.g., a rate 1/2 binary convolutional code) and generates code bits. A parser then parses the code bits into the M streams based on the sequence of puncture cycles, one puncture cycle at a time and in the order indicated by the sequence.
摘要翻译：描述了以可选择的数据速率将数据解析成多个（M）流的技术。基于为该流选择的数据速率来确定每个流的调制方案和码率。所有M个流的调制方案和码率用于确定分析周期中每个流的解析周期和穿孔次数。形成针对M个流的穿刺周期的序列，使得每个流的穿刺循环在整个序列上尽可能均匀地分布。编码器根据基本码（例如，速率1/2二进制卷积码）编码业务数据，并生成码位。解析器然后基于穿刺周期的序列，一次一次的穿刺周期和按序列表示的顺序将代码位解析成M个流。

65. 发明授权

US07894538B2 Frequency-independent spatial processing for wideband MISO and MIMO systems 有权
标题翻译：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
申请人： J. Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： J. Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
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。

66. 发明申请

US20100215115A1 RECEIVER SPATIAL PROCESSING FOR EIGENMODE TRANSMISSION IN A MIMO SYSTEM 有权
标题翻译：用于MIMO系统中的特征码传输的接收空间处理
公开(公告)号：US20100215115A1
公开(公告)日：2010-08-26
申请号：US12773722
申请日：2010-05-04
申请人： John W. Ketchum , Mark S. Wallace , J. Rodney Walton , Steven J. Howard
发明人： John W. Ketchum , Mark S. Wallace , J. Rodney Walton , Steven J. Howard
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。

67. 发明申请

US20090322621A1 ANTENNA ARRAY CONFIGURATIONS FOR HIGH THROUGHPUT MIMO WLAN SYSTEMS 审中-公开
标题翻译：天线阵列配置用于高速吞吐MIMO无线局域网系统
公开(公告)号：US20090322621A1
公开(公告)日：2009-12-31
申请号：US12165641
申请日：2008-06-30
申请人： Hakan Inanoglu , John W. Ketchum , Leon Metreaud , Mark S. Wallace
发明人： Hakan Inanoglu , John W. Ketchum , Leon Metreaud , Mark S. Wallace
IPC分类号： H01Q13/10 , H01Q1/24
CPC分类号： H01Q21/064 , H01Q1/2258 , H01Q1/2291 , H01Q13/106 , H01Q21/26 , H04B7/04 , H04B7/10
摘要： The present disclosure provides techniques for configuring multi-element antenna arrays. Such antenna arrays may be designed with slot pairs separated by λ/2 along perpendicular axes (e.g., x and y-directions). One such array may have four or more co-located antenna element pairs formed with cross slots having the same rotational orientation. Another such array may have four or more co-located antenna element pairs formed with some cross slots having the same rotational orientation and other cross slots having a different rotational orientation.
摘要翻译：本公开提供了用于配置多元件天线阵列的技术。这样的天线阵列可以被设计成沿着垂直轴（例如，x和y方向）以λ/ 2分隔的槽对。一个这样的阵列可以具有四个或更多个共同定位的天线元件对，其形成有具有相同旋转取向的十字槽。另一个这样的阵列可以具有四个或更多个共同定位的天线元件对，其形成有具有相同旋转取向的一些十字槽和具有不同旋转取向的其它十字槽。

68. 发明申请

US20080285669A1 MIMO WLAN SYSTEM 有权
公开(公告)号：US20080285669A1
公开(公告)日：2008-11-20
申请号：US12112789
申请日：2008-04-30
申请人： J. Rodney Walton , Mark S. Wallace , John W. Ketchum , Steven J. Howard
发明人： J. Rodney Walton , Mark S. Wallace , John W. Ketchum , Steven J. Howard
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.

69. 发明授权

US07346115B2 Iterative eigenvector computation for a MIMO communication system 有权
标题翻译： MIMO通信系统的迭代特征向量计算
公开(公告)号：US07346115B2
公开(公告)日：2008-03-18
申请号：US10830907
申请日：2004-04-22
申请人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Peter Monsen , J. Rodney Walton
发明人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Peter Monsen , J. Rodney Walton
IPC分类号： H04L27/28 , H04L1/02
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。

70. 发明授权

US07298805B2 Multi-antenna transmission for spatial division multiple access 有权
标题翻译：用于空分多址的多天线传输
公开(公告)号：US07298805B2
公开(公告)日：2007-11-20
申请号：US10719802
申请日：2003-11-21
申请人： J. Rodney Walton , John W. Ketchum , John Edward Smee , Mark S. Wallace , Steven J. Howard
发明人： J. Rodney Walton , John W. Ketchum , John Edward Smee , Mark S. Wallace , Steven J. Howard
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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