公开(公告)号：US09654197B2

公开(公告)日：2017-05-16

申请号：US13086060

申请日：2011-04-13

申请人： Pengfei Xia ,  Qiang Wu ,  David Mazzarese ,  Yongxing Zhou ,  Yang Tang

发明人： Pengfei Xia ,  Qiang Wu ,  David Mazzarese ,  Yongxing Zhou ,  Yang Tang

IPC分类号： H04B7/06

CPC分类号： H04B7/063 ,  H04B7/0634 ,  H04B7/065

摘要： A system and method for feeding back channel information are provided. A method for communications device operations includes generating feedback information, encoding the feedback information to produce a feedback payload, and transmitting the feedback payload to a communications server serving a communications device. The feedback information includes at least a first long term wideband channel statistics and a second long term wideband channel statistics.

公开(公告)号：US20110255613A1

公开(公告)日：2011-10-20

申请号：US13086060

申请日：2011-04-13

申请人： Pengfei Xia ,  Qiang Wu ,  David Mazzarese ,  Yongxing Zhou ,  Yang Tang

发明人： Pengfei Xia ,  Qiang Wu ,  David Mazzarese ,  Yongxing Zhou ,  Yang Tang

IPC分类号： H04L27/00

CPC分类号： H04B7/063 ,  H04B7/0634 ,  H04B7/065

摘要： A system and method for feeding back channel information are provided. A method for communications device operations includes generating feedback information, encoding the feedback information to produce a feedback payload, and transmitting the feedback payload to a communications server serving a communications device. The feedback information includes at least a first long term wideband channel statistics and a second long term wideband channel statistics.

摘要翻译： 提供了一种用于反馈信道信息的系统和方法。 用于通信设备操作的方法包括产生反馈信息，对反馈信息进行编码以产生反馈有效载荷，以及将反馈有效载荷发送到服务于通信设备的通信服务器。 反馈信息包括至少第一长期宽带信道统计和第二长期宽带信道统计。

公开(公告)号：US20110273993A1

公开(公告)日：2011-11-10

申请号：US13102802

申请日：2011-05-06

申请人： David Mazzarese ,  Yongxing Zhou ,  Yang Tang ,  Pengfei Xia

发明人： David Mazzarese ,  Yongxing Zhou ,  Yang Tang ,  Pengfei Xia

IPC分类号： H04W24/10

CPC分类号： H04Q11/0478 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0029

摘要： A system and method for reporting quantized feedback information for adaptive codebooks include generating channel state information, encoding all or part of the channel state information to produce a feedback payload and transmitting the feedback payload to a base station from a mobile station. The channel state information comprises a rank indicator, a first matrix indicator, a wideband channel quality indicator, a second matrix indicator and at least one narrowband channel quality indicator. When the rank indicator is greater than 1, the first matrix indicator is reported in a second report. On the other hand, when the rank indicator is equal to 1, the content of the first matrix indicator is split between a second report and a third report.

摘要翻译： 用于报告用于自适应码本的量化反馈信息的系统和方法包括产生信道状态信息，对全部或部分信道状态信息进行编码以产生反馈有效载荷，并将反馈有效载荷从移动台发送到基站。 信道状态信息包括秩指示符，第一矩阵指示符，宽带信道质量指示符，第二矩阵指示符和至少一个窄带信道质量指示符。 当秩指标大于1时，第一个矩阵指示器在第二个报告中报告。 另一方面，当秩指示符等于1时，第一矩阵指示符的内容在第二报告和第三报告之间分配。

公开(公告)号：US08630311B2

公开(公告)日：2014-01-14

申请号：US13102802

申请日：2011-05-06

申请人： David Mazzarese ,  Yongxing Zhou ,  Yang Tang ,  Pengfei Xia

发明人： David Mazzarese ,  Yongxing Zhou ,  Yang Tang ,  Pengfei Xia

IPC分类号： H04J3/24 ,  H04Q11/04

CPC分类号： H04Q11/0478 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0029

摘要： A system and method for reporting quantized feedback information for adaptive codebooks include generating channel state information, encoding all or part of the channel state information to produce a feedback payload and transmitting the feedback payload to a base station from a mobile station. The channel state information comprises a rank indicator, a first matrix indicator, a wideband channel quality indicator, a second matrix indicator and at least one narrowband channel quality indicator. When the rank indicator is greater than 1, the first matrix indicator is reported in a second report. On the other hand, when the rank indicator is equal to 1, the content of the first matrix indicator is split between a second report and a third report.

摘要翻译： 用于报告用于自适应码本的量化反馈信息的系统和方法包括产生信道状态信息，对全部或部分信道状态信息进行编码以产生反馈有效载荷，并将反馈有效载荷从移动台发送到基站。 信道状态信息包括秩指示符，第一矩阵指示符，宽带信道质量指示符，第二矩阵指示符和至少一个窄带信道质量指示符。 当秩指标大于1时，第一个矩阵指示器在第二个报告中报告。 另一方面，当秩指示符等于1时，第一矩阵指示符的内容在第二报告和第三报告之间分配。

公开(公告)号：US08705443B2

公开(公告)日：2014-04-22

申请号：US12711654

申请日：2010-02-24

申请人： Yang Tang ,  Pengfei Xia ,  Zhigang Rong

发明人： Yang Tang ,  Pengfei Xia ,  Zhigang Rong

IPC分类号： H04W4/00 ,  H04L12/16 ,  H04Q11/00 ,  H04L27/00

CPC分类号： H04L25/0248 ,  H04B7/0452 ,  H04B7/0663 ,  H04L25/0204

摘要： A system and method for reduced feedback in MU-MIMO communications is provided. A method for transmitter operations includes transmitting a pilot signal, receiving channel information feedback from a set of K communications devices served by a transmitter, where K is a non-negative integer value and K≧2, selecting M communications devices out of the set of K communications devices, where M is a non-negative integer value and M≦K, computing a precoder for each of the M selected communications devices based on the channel information feedback, and simultaneously transmitting information to the M selected communications devices. The channel information feedback includes partial information for a communications channel between the transmitter and a communications device, the selecting being based on the channel information feedback, and the information transmitted to each communications device in the M selected communications devices being precoded using a computed precoder associated with the communications device.

摘要翻译： 提供了一种用于MU-MIMO通信中的减少反馈的系统和方法。 一种用于发射机操作的方法包括：传输导频信号，从由发射机服务的一组K个通信设备接收信道信息反馈，其中K是非负整数值，K≥2，选择M个通信设备 K通信设备，其中M是非负整数值，并且M＆NlE; K，基于信道信息反馈计算M个选择的通信设备中的每一个的预编码器，并且同时向M个选择的通信设备发送信息。 信道信息反馈包括用于发射机和通信设备之间的通信信道的部分信息，所述选择基于信道信息反馈，并且传输到M个选择的通信设备中的每个通信设备的信息使用计算的预编码器相关联进行预编码 与通信设备。

公开(公告)号：US20110243207A1

公开(公告)日：2011-10-06

申请号：US13011679

申请日：2011-01-21

申请人： Yang Tang ,  Pengfei Xia

发明人： Yang Tang ,  Pengfei Xia

IPC分类号： H04B17/00 ,  H04L27/00

CPC分类号： H04L25/03343 ,  H04B7/0626 ,  H04L2025/03808

摘要： A system and method for adapting codebooks are provided. A method for communications device operations includes receiving a pilot signal, computing a channel estimate for a channel between a controller and a communications device, the computing being based on the pilot signal, adapting a codebook based on the channel estimate and positions of codewords in the codebook, computing a representation of the channel using the adapted codebook, transmitting the representation of the channel as feedback information, and receiving a transmission beamformed based on the feedback information.

摘要翻译： 提供了一种适应码本的系统和方法。 一种用于通信设备操作的方法包括接收导频信号，计算控制器和通信设备之间的信道的信道估计，所述计算是基于导频信号，基于信道估计和码字中的位置来调整码本 码本，使用适应的码本计算信道的表示，将该信道的表示传输为反馈信息，以及基于该反馈信息接收形成的传输波束。

公开(公告)号：US20100265841A1

公开(公告)日：2010-10-21

申请号：US12760038

申请日：2010-04-14

申请人： Zhigang Rong ,  Pengfei Xia ,  Yang Tang

发明人： Zhigang Rong ,  Pengfei Xia ,  Yang Tang

IPC分类号： H04L12/26

CPC分类号： H04L43/08 ,  H04B7/0417 ,  H04B7/0639 ,  H04L5/0023 ,  H04L25/0224 ,  H04L41/0816

摘要： A system and method for wireless communications with codebook adaptation with low feedback overhead are provided. A method for controller operations includes receiving a first channel information from a communications device, estimating channel statistics based on the first channel information, adapting a codebook using the channel statistics, and receiving a second channel information from the communications device. The method also includes constructing a precoding matrix from the second channel information and the adapted codebook, and transmitting information precoded by the precoding matrix to the communications device.

摘要翻译： 提供了一种用于具有低反馈开销的码本适配的无线通信的系统和方法。 一种用于控制器操作的方法包括从通信设备接收第一信道信息，基于第一信道信息估计信道统计，使用信道统计调整码本，以及从通信设备接收第二信道信息。 该方法还包括从第二信道信息和适应码本构建预编码矩阵，以及将通过预编码矩阵预编码的信息发送到通信设备。

公开(公告)号：US08675627B2

公开(公告)日：2014-03-18

申请号：US12621288

申请日：2009-11-18

申请人： Pengfei Xia ,  Yang Tang ,  Zhigang Rong

发明人： Pengfei Xia ,  Yang Tang ,  Zhigang Rong

IPC分类号： H04B7/216

CPC分类号： H04L25/03343 ,  H04B7/0482 ,  H04B7/0626 ,  H04L1/0001 ,  H04L2025/03426 ,  H04L2025/03605 ,  H04L2025/03808

摘要： Adaptive precoding codebooks are described. In one embodiment, the method of wireless communication includes reading at least a rank-2 baseline codebook having codewords representing precoding matrices. An adaptive codebook is generated by multiplying a first column of the codeword with a first transform matrix calculated from a channel correlation matrix, and multiplying a second column of the codeword with a second transform matrix calculated from the channel correlation matrix. The first and the second transform matrices are orthogonal.

摘要翻译： 描述了自适应预编码码本。 在一个实施例中，无线通信的方法包括读取至少具有表示预编码矩阵的码字的2级基线码本。 通过将码字的第一列与从信道相关矩阵计算的第一变换矩阵相乘，并将码字的第二列与从信道相关矩阵计算的第二变换矩阵相乘来生成自适应码本。 第一和第二变换矩阵是正交的。

公开(公告)号：US08649456B2

公开(公告)日：2014-02-11

申请号：US12722450

申请日：2010-03-11

申请人： Pengfei Xia ,  Yang Tang ,  Zhigang Rong ,  Linhong Chen

发明人： Pengfei Xia ,  Yang Tang ,  Zhigang Rong ,  Linhong Chen

IPC分类号： H04L1/02

CPC分类号： H04B7/0626 ,  H04B7/0417 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0478 ,  H04B7/0482 ,  H04B7/0639 ,  H04B7/065 ,  H04B7/0663 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/0391

摘要： A system and method for channel information feedback in a wireless communications system is provided. A method for communications device operation includes receiving a pilot transmitted by a controller, computing a channel estimate for a channel between the controller and a communications device, the computing based on the pilot, computing a channel correlation matrix for the channel based on the channel estimate, and transmitting a reduced rank representation of the channel correlation matrix to the controller as a first feedback information. The method also includes adapting a first codebook based on the reduced rank representation of the channel correlation matrix, computing a representation of the channel using the adapted codebook, transmitting the representation of the channel as a second feedback information, and receiving a transmission beamformed based on the first feedback information and the second feedback information.

摘要翻译： 提供了一种用于无线通信系统中的信道信息反馈的系统和方法。 一种用于通信设备操作的方法包括接收由控制器发送的导频，计算控制器和通信设备之间的信道的信道估计，基于导频的计算，基于信道估计计算信道的信道相关矩阵 并且将作为第一反馈信息的信道相关矩阵的缩减秩表示发送到控制器。 该方法还包括基于信道相关矩阵的降级表示来适配第一码本，使用适配码本计算信道的表示，将该信道的表示作为第二反馈信息发送，以及接收基于 第一反馈信息和第二反馈信息。

公开(公告)号：US20100232525A1

公开(公告)日：2010-09-16

申请号：US12722450

申请日：2010-03-11

申请人： Pengfei Xia ,  Yang Tang ,  Zhigang Rong ,  Linhong Chen

发明人： Pengfei Xia ,  Yang Tang ,  Zhigang Rong ,  Linhong Chen

IPC分类号： H04L27/00

CPC分类号： H04B7/0626 ,  H04B7/0417 ,  H04B7/043 ,  H04B7/0434 ,  H04B7/0478 ,  H04B7/0482 ,  H04B7/0639 ,  H04B7/065 ,  H04B7/0663 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/0391

摘要： A system and method for channel information feedback in a wireless communications system is provided. A method for communications device operation includes receiving a pilot transmitted by a controller, computing a channel estimate for a channel between the controller and a communications device, the computing based on the pilot, computing a channel correlation matrix for the channel based on the channel estimate, and transmitting a reduced rank representation of the channel correlation matrix to the controller as a first feedback information. The method also includes adapting a first codebook based on the reduced rank representation of the channel correlation matrix, computing a representation of the channel using the adapted codebook, transmitting the representation of the channel as a second feedback information, and receiving a transmission beamformed based on the first feedback information and the second feedback information

摘要翻译： 提供了一种用于无线通信系统中的信道信息反馈的系统和方法。 一种用于通信设备操作的方法包括接收由控制器发送的导频，计算控制器和通信设备之间的信道的信道估计，基于导频的计算，基于信道估计计算信道的信道相关矩阵 并且将作为第一反馈信息的信道相关矩阵的缩减秩表示发送到控制器。 该方法还包括基于信道相关矩阵的降级表示来适配第一码本，使用适配码本计算信道的表示，将该信道的表示作为第二反馈信息发送，以及接收基于 第一反馈信息和第二反馈信息