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。

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。

公开(公告)号：US20090092087A1

公开(公告)日：2009-04-09

申请号：US12172979

申请日：2008-07-14

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： H04W74/00 ,  H04L27/28

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。

公开(公告)号：US09548851B2

公开(公告)日：2017-01-17

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 ,  H04L5/02 ,  H04B1/7107 ,  H04B7/04 ,  H04B7/06

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。

公开(公告)号：US20170126290A1

公开(公告)日：2017-05-04

申请号：US15405934

申请日：2017-01-13

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： H04B7/04 ,  H04B17/309 ,  H04W16/28 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0408

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.

公开(公告)号：US09031097B2

公开(公告)日：2015-05-12

申请号：US12649040

申请日：2009-12-29

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： H04J11/00 ,  H04B7/14 ,  H04B7/04 ,  H04L25/02 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04W74/04 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04L25/03 ,  H04W16/28 ,  H04W52/50

CPC分类号： H04B7/0417 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0628 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04J11/003 ,  H04J11/0053 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/06 ,  H04L5/0073 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/0248 ,  H04L25/03343 ,  H04L25/03891 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/261 ,  H04L27/2647 ,  H04L27/2675 ,  H04W16/28 ,  H04W52/50 ,  H04W72/046 ,  H04W74/04

摘要： A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas. For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.

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。

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。

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。

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.