公开(公告)号：US20110243081A1

公开(公告)日：2011-10-06

申请号：US13077623

申请日：2011-03-31

申请人： Yong Liu ,  Harish Ramamurthy ,  Raja Banerjea ,  Hongyuan Zhang

发明人： Yong Liu ,  Harish Ramamurthy ,  Raja Banerjea ,  Hongyuan Zhang

IPC分类号： H04W72/04 ,  H04W84/12

CPC分类号： H04W4/08 ,  H04W4/06 ,  H04W72/042 ,  H04W84/12

摘要： Systems and techniques relating to wireless communications are described. A described technique includes generating one or more assignment records for a wireless communication device, generating an assignment message that includes the one or more generated assignment records, and transmitting the assignment message to cause the wireless communication device to initialize or update a multi-user group table based on the assignment message and filter one or more received multi-user transmissions based on the multi-user group table. The assignment message can indicate one or more group identifiers and one or more group member identifiers that are assigned to the wireless communication device and one or more group identifiers that are not assigned to the wireless communication device.

摘要翻译： 描述与无线通信相关的系统和技术。 所描述的技术包括为无线通信设备生成一个或多个分配记录，生成包括所述一个或多个生成的分配记录的分配消息，以及发送分配消息，以使无线通信设备初始化或更新多用户组 基于分配消息的表，并且基于多用户组表过滤一个或多个接收的多用户传输。 分配消息可以指示分配给无线通信设备的一个或多个组标识符和一个或多个组成员标识符以及未分配给无线通信设备的一个或多个组标识符。

公开(公告)号：US07978781B2

公开(公告)日：2011-07-12

申请号：US12785234

申请日：2010-05-21

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Kedar Shirali ,  Peter Loc

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Kedar Shirali ,  Peter Loc

IPC分类号： H04B7/02 ,  H04B1/40 ,  H04L23/02

CPC分类号： H04B7/0413 ,  H04B7/0617 ,  H04B17/21 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

摘要： A first packet is transmitted via a forward channel corresponding to a signal direction from a first transceiver device to a second transceiver device, wherein the first packet includes a request to initiate calibration. A partial dimensional description of a reverse channel is determined based on the reception of a second packet received from the second transceiver device, wherein the second packet includes training information of spatial dimensions used for the transmission of the second packet but does not include training information for all available spatial dimensions of a reverse channel. A correction matrix is developed from the partial dimensional description of the reverse channel and a description of the forward channel, and the correction matrix and a steering matrix is used to process signals to be transmitted via the forward channel.

摘要翻译： 第一分组经由与从第一收发器设备到第二收发器设备的信号方向对应的前向信道发送，其中第一分组包括启动校准的请求。 基于从第二收发器设备接收到的第二分组的接收来确定反向信道的部分维度描述，其中第二分组包括用于传输第二分组的空间维度的训练信息，但不包括用于 反向通道的所有可用空间维度。 从反向信道的部分维度描述和正向信道的描述开发校正矩阵，并且使用校正矩阵和导引矩阵来处理要经由前向信道发送的信号。

公开(公告)号：US20110096797A1

公开(公告)日：2011-04-28

申请号：US12910628

申请日：2010-10-22

申请人： Hongyuan Zhang ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

发明人： Hongyuan Zhang ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

IPC分类号： H04J3/24

CPC分类号： H04B7/0452 ,  H04B7/0413 ,  H04B7/0669 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0226 ,  H04W84/12

摘要： In a method for generating a preamble of a data unit for transmission via a multiple input, multiple output (MIMO) communication channel, a first field of the preamble is generated. The first field provides a plurality of indicators to a plurality of receivers. Each one of the plurality of indicators indicates a set of a plurality of training sequences that corresponds to transmission of the data unit to a corresponding one of the plurality of receivers. The plurality of training sequences is included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted.

摘要翻译： 在通过多输入多输出（MIMO）通信信道生成用于传输的数据单元的前同步码的方法中，生成前导码的第一字段。 第一场向多个接收机提供多个指示符。 多个指示符中的每个指示符指示对应于数据单元向多个接收器中的相应一个的传输的多个训练序列的集合。 多个训练序列被包括在前导码的第二个字段中。 格式化前置码使得前导码的第一字段将在正在发送的前导码的第二字段之前被发送。

公开(公告)号：US20090285269A1

公开(公告)日：2009-11-19

申请号：US12419460

申请日：2009-04-07

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu

IPC分类号： H04B1/707

CPC分类号： H04W56/001 ,  H04B1/7073 ,  H04B1/70735 ,  H04B2201/7073 ,  H04J13/0014 ,  H04J13/10 ,  H04L5/0016 ,  H04L27/2613 ,  H04L27/262 ,  H04L27/2656 ,  H04L27/2662 ,  H04W56/00

摘要： A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.

摘要翻译： 从通过无线网络发送的数据分组中提取数据的系统和方法包括：接收具有前同步码部分和有效载荷部分的数据分组。 前导码部分与第一已知扩展序列交叉相关，以产生第一定时信号，并且前同步码部分与第二已知扩展信号相互相关，以产生帧定时信号。 在第一定时信号中检测到脉冲，并且基于第一定时信号中检测到的脉冲设置第一定时参数。 在帧定时信号中检测到脉冲，并且基于帧定时信号中检测到的脉冲设置帧定时参数。 根据第一定时参数和帧定时参数从接收到的有效载荷部分提取数据。

公开(公告)号：US20090252104A1

公开(公告)日：2009-10-08

申请号：US12410883

申请日：2009-03-25

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

IPC分类号： H04W72/00 ,  H04L27/28

CPC分类号： H04L27/14 ,  H04L1/0025 ,  H04L5/0007 ,  H04L5/0092 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2602

摘要： Systems and methods are provided for processing a payload portion of a received signal in a single carrier mode or a multiple carrier mode using a wireless channel receiver based on a portion of the received signal, where a signaling portion of the received signal is a single carrier signal. A single carrier signaling portion is received, and whether the payload portion of the signal is a single carrier signal or a multiple carrier signal is detected from the received single carrier signaling portion. The payload portion of the received signal is demodulated in a single carrier mode if the detecting determines that the payload portion of the received signal is a single carrier signal, and the payload portion of the received signal is demodulated in a multiple carrier mode if the detecting determines that the payload portion of the received signal is a multiple carrier signal. Data from the demodulated payload portion of the received signal is stored in a computer-readable memory.

摘要翻译： 提供了系统和方法，用于基于接收信号的一部分，使用无线信道接收机以单载波模式或多载波模式处理接收信号的有效载荷部分，其中接收信号的信令部分是单载波 信号。 接收单载波信令部分，以及信号的有效载荷部分是单载波信号还是从所接收的单载波信令部分检测多载波信号。 如果检测确定接收信号的有效载荷部分是单载波信号，则以单载波模式解调接收信号的有效载荷部分，并且如果检测到接收信号的有效载荷部分以多载波模式被解调 确定接收信号的有效载荷部分是多载波信号。 来自接收信号的解调有效载荷部分的数据被存储在计算机可读存储器中。

公开(公告)号：US20090097395A1

公开(公告)日：2009-04-16

申请号：US12251834

申请日：2008-10-15

申请人： Hongyuan Zhang ,  Rohit U. Nabar

发明人： Hongyuan Zhang ,  Rohit U. Nabar

IPC分类号： H04J11/00

CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0632 ,  H04L1/0001

摘要： Systems and methods for transmitting packets to a receiver. In an implementation, the method includes storing, in a memory, a plurality of predefined spatial mapping matrices for use in a transmission of one or more packets to a receiver; sequentially transmitting one or more packets to the receiver, in which each of the sequential transmissions of one or more packets comprises using a different one of the plurality of predefined spatial mapping matrices stored in the memory; and selecting one of the plurality of predefined spatial mapping matrices stored in the memory for use in a subsequent transmission of one or more packets to the receiver, in which the selection of the one of the plurality of predefined spatial mapping matrices for use in the subsequent transmission is based on a quality of reception of the one or more data packets transmitted in each of the sequential transmissions

摘要翻译： 用于将数据包发送到接收器的系统和方法。 在实现中，该方法包括在存储器中存储多个预定义的空间映射矩阵，用于将一个或多个分组传输到接收机; 顺序地将一个或多个分组发送到接收机，其中一个或多个分组的顺序传输中的每一个包括使用存储在存储器中的多个预定空间映射矩阵中的不同的一个; 以及选择存储在所述存储器中的所述多个预定义的空间映射矩阵中的一个，用于将一个或多个分组的后续传输用于所述接收机，其中所述多个预定空间映射矩阵中的所述一个的选择用于随后的 传输基于在每个顺序传输中发送的一个或多个数据分组的接收质量

公开(公告)号：US20090022128A1

公开(公告)日：2009-01-22

申请号：US12175526

申请日：2008-07-18

申请人： Rohit U. Nabar ,  Hongyuan Zhang ,  Hui-Ling Lou

发明人： Rohit U. Nabar ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC分类号： H04Q7/24

CPC分类号： H04W72/0446 ,  H04B7/0452 ,  H04B7/0697 ,  H04L5/006 ,  H04L65/608 ,  H04W28/0215 ,  H04W72/048 ,  H04W74/06

摘要： A wireless network device comprises R modulation modules that receive R independent data streams, that modulate the R independent data streams, and that apply a multiplexing matrix to generate M modulated and multiplexed data streams, respectively, where R and M are integers greater than one. M summing modules sum portions of each of the M modulated and multiplexed data streams to generate M transmit data streams. M transmitters simultaneously transmit the M transmit data streams during a simultaneous downlink transmission (SDT) period.

摘要翻译： 无线网络设备包括R调制模块，R调制模块接收R个独立数据流，调制R独立数据流，并且应用复用矩阵分别产生M个调制和复用的数据流，其中R和M是大于1的整数。 M个求和模块将M个调制和多路复用数据流中的每一个的部分相加以产生M个发送数据流。 M发射机在同时的下行链路传输（SDT）周期期间同时传输M个发送数据流。

公开(公告)号：US20090022093A1

公开(公告)日：2009-01-22

申请号：US12175501

申请日：2008-07-18

申请人： Rohit U. Nabar ,  Hongyuan Zhang ,  Hui-Ling Lou

发明人： Rohit U. Nabar ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC分类号： H04Q7/00

CPC分类号： H04L5/0055 ,  H04B7/2618 ,  H04L5/0005 ,  H04W52/04 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/08

摘要： A wireless network comprises R client stations that respectively generate simultaneous uplink transmission (SUT) data, where R is an integer greater than one. An access point (AP) receives SUT data from each of the R client stations during an SUT period.

摘要翻译： 无线网络包括分别产生同时上行链路传输（SUT）数据的R个客户站，其中R是大于1的整数。 接入点（AP）在SUT期间从每个R客户端接收SUT数据。

公开(公告)号：US20080266176A1

公开(公告)日：2008-10-30

申请号：US12109257

申请日：2008-04-24

申请人： Rohit U. Nabar ,  Hongyuan Zhang

发明人： Rohit U. Nabar ,  Hongyuan Zhang

IPC分类号： H01Q3/00 ,  H03G3/00

CPC分类号： H04B7/0617 ,  H01Q3/40 ,  H03F3/245 ,  H03G3/3042 ,  H04B7/0408 ,  H04W16/28

摘要： One or more beamsteering matrices are applied to a plurality of signals to be transmitted via multiple antennas. The plurality of signals are provided to a plurality of power amplifiers coupled to the multiple antennas after applying the one or more beamsteering matrices to the plurality of signals. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and output power levels of the plurality of power amplifiers are adjusted based on the determined signal energies.

摘要翻译： 一个或多个波束引导矩阵被施加到要经由多个天线发送的多个信号。 在将一个或多个波束引导矩阵应用于多个信号之后，将多个信号提供给耦合到多个天线的多个功率放大器。 对于提供给多个功率放大器的多个信号确定信号能量，并且基于所确定的信号能量来调整多个功率放大器的输出功率电平。

公开(公告)号：US09655002B2

公开(公告)日：2017-05-16

申请号：US12758603

申请日：2010-04-12

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Mao Yu ,  Raja Banerjea

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Mao Yu ,  Raja Banerjea

IPC分类号： H04W80/00 ,  H04W28/06 ,  H04L1/00 ,  H04L29/06 ,  H04L27/26 ,  H04W84/12 ,  H04W99/00

CPC分类号： H04L1/0079 ,  H04L1/0072 ,  H04L1/009 ,  H04L27/2613 ,  H04L69/18 ,  H04W28/06 ,  H04W84/12 ,  H04W99/00

摘要： In a method for generating a data unit for transmission via a communication channel, wherein the data unit conforms to a first communication protocol, a preamble of the data unit is generated. The preamble includes a first field having information that indicates a duration of the data unit, the first field being formatted such that the first field is decodable by a receiver device that conforms to a second communication protocol but does not conform to the first communication protocol to determine the duration of the data unit based on the first field. Additionally, the preamble is formatted such that a portion of the preamble is decodable by a receiver device that conforms to a third communication protocol but does not conform to the first communication protocol. Also, the preamble is formatted such that a receiver device that conforms to the first communication protocol can determine that the data unit conforms to the first communication protocol. A data portion of the data unit that conforms to the first communication protocol and does not conform to either (i) the second communication protocol or (ii) the third communication protocol is generated.