公开(公告)号：US08630588B2

公开(公告)日：2014-01-14

申请号：US12605978

申请日：2009-10-26

申请人： Yong Liu ,  Hongyuan Zhang ,  Songping Wu

发明人： Yong Liu ,  Hongyuan Zhang ,  Songping Wu

IPC分类号： H04B1/00

CPC分类号： H04B7/04 ,  H04B7/0617 ,  H04B7/0632 ,  H04L43/0847 ,  H04W16/28 ,  H04W84/02

摘要： A plurality of beacon data units are generated, and each beacon data unit in the plurality of beacon data units includes an indication that the beacon data unit can be used for transmit beamforming training. The plurality of beacon data units are transmitted via a plurality of antennas during a timeslot reserved for the transmission of beacons. A different beamforming vector is applied to a beamforming network as each beacon data unit is transmitted. In another aspect, a first beamforming training transmission corrupted by a collision is received. A first station to which the first beamforming training transmission corresponds is determined based on the first beamforming training transmission corrupted by the collision. In response to determining the first station, a signal is transmitted to the first station to prompt the first station to transmit a second beamforming training transmission.

摘要翻译： 生成多个信标数据单元，并且多个信标数据单元中的每个信标数据单元包括信标数据单元可用于发送波束形成训练的指示。 在为发送信标而保留的时隙期间，经由多个天线发送多个信标数据单元。 当发送每个信标数据单元时，将不同的波束形成向量应用于波束形成网络。 在另一方面，接收到被冲突破坏的第一波束形成训练传输。 基于由碰撞破坏的第一波束形成训练传输来确定第一波束形成训练传输对应的第一站。 响应于确定第一站，将信号发送到第一站，以提示第一站发送第二波束形成训练传输。

公开(公告)号：US08611477B1

公开(公告)日：2013-12-17

申请号：US12435166

申请日：2009-05-04

申请人： Rohit U. Nabar ,  Hongyuan Zhang

发明人： Rohit U. Nabar ,  Hongyuan Zhang

IPC分类号： H04L27/08

CPC分类号： H04L25/0204 ,  H04B1/0475 ,  H04B1/1027 ,  H04B7/0865 ,  H04B15/04 ,  H04B15/06 ,  H04B17/345 ,  H04L5/0023 ,  H04L25/022 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/3809

摘要： A method for estimating and compensating for noise on antennas of a multi-antenna wireless system. The method includes receiving multiple signals via multiple receive antennas of a receiver, where each of the signals is received via a respective antenna. The method further includes estimating noise power imbalance corresponding to the receive antennas based on the multiple signals.

摘要翻译： 一种用于估计和补偿多天线无线系统的天线上的噪声的方法。 该方法包括经由接收机的多个接收天线接收多个信号，其中每个信号经由相应的天线接收。 该方法还包括基于多个信号估计与接收天线相对应的噪声功率不平衡。

公开(公告)号：US08588144B2

公开(公告)日：2013-11-19

申请号：US13430170

申请日：2012-03-26

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： H04W4/00

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 includes modulation modules, each configured to receive a data stream and modulate the data stream to generate a modulated data stream. A matrix module generates a multiplexing matrix based on channel conditions between the wireless network device and each of a plurality of client stations, and applies the multiplexing matrix to each of the modulated data streams to generate multiplexed data streams. The wireless network device also includes summing modules, each configured to sum at least two of the multiplexed data streams to generate a transmit data stream. A first transmitter transmits a first one of the transmit data streams during a downlink transmission period to a first one of the client stations. A second transmitter transmits a second one of the transmit data streams to a second one of the client stations while the first transmitter transmits the first one of the transmit data streams.

摘要翻译： 无线网络设备包括调制模块，每个调制模块被配置为接收数据流并且调制数据流以生成调制数据流。 矩阵模块基于无线网络设备和多个客户站中的每一个之间的信道条件生成多路复用矩阵，并且将多路复用矩阵应用于每个调制数据流以生成复用数据流。 无线网络设备还包括求和模块，每个模块被配置为对多路复用数据流中的至少两个进行求和以产生发送数据流。 第一发射机在下行链路传输周期期间将第一个发射数据流发射到客户站的第一个。 第二发射机在第一发射机发送第一个发射数据流的同时，将第二个发射数据流发射到客户端的第二个。

公开(公告)号：US08542659B2

公开(公告)日：2013-09-24

申请号：US13177236

申请日：2011-07-06

申请人： Hongyuan Zhang ,  Sudhir Srinivasa

发明人： Hongyuan Zhang ,  Sudhir Srinivasa

IPC分类号： H04Q7/24

CPC分类号： H04L27/2607 ,  H04B7/0671 ,  H04L27/261

摘要： A system including a training field generator module, a stream generator module, and a cyclic shift delay module. The training field generator module generates training fields to be transmitted in a packet to client stations. The stream generator module generates streams to be transmitted in the packet. First streams (i) are designated for a first client station and (ii) include the training fields. Second streams (i) are designated for a second client station and (ii) include the training fields. The cyclic shift delay module applies cyclic shift delay values to the streams. First cyclic shift delay values are respectively applied to the first streams. Second cyclic shift delay values are respectively applied to the second streams. At least one of the second cyclic shift delay values is equal to one of the first cyclic shift delay values. Alternatively, the second values are different than the first values.

摘要翻译： 一种包括训练场发生器模块，流发生器模块和循环移位延迟模块的系统。 训练场发生器模块产生要在分组中传送到客户站的训练场。 流生成器模块生成要在分组中传输的流。 第一流（i）被指定用于第一客户站，（ii）包括训练场。 第二流（i）被指定用于第二客户站，（ii）包括训练场。 循环移位延迟模块将循环移位延迟值应用于流。 第一循环移位延迟值分别应用于第一流。 第二循环移位延迟值分别应用于第二流。 第二循环移位延迟值中的至少一个等于第一循环移位延迟值之一。 或者，第二值不同于第一值。

公开(公告)号：US08472383B1

公开(公告)日：2013-06-25

申请号：US12952059

申请日：2010-11-22

申请人： Raja Banerjea ,  Hongyuan Zhang

发明人： Raja Banerjea ,  Hongyuan Zhang

IPC分类号： H04W4/00 ,  H04Q11/12 ,  H04B1/04 ,  H04B7/00

CPC分类号： H04W72/0473 ,  H04B7/0697

摘要： A method in a receiving device that receives data from a plurality of transmitting devices via a shared wireless communication channel includes selecting a group of two or more transmitting devices from the plurality of transmitting devices for simultaneous transmission of respective data to the receiving device, so that each transmitting device in the group of transmitting devices transmits the respective data to the receiving device at a nominal power level of the transmitting device, and receiving the respective data from each in the group of transmitting devices simultaneously via the shared wireless communication channel.

摘要翻译： 接收装置中经由共享无线通信信道从多个发送装置接收数据的方法包括从多个发送装置中选择一组两个以上的发送装置，以将各自的数据同时发送到接收装置，使得 发送设备组中的每个发送设备以发送设备的标称功率电平将相应数据发送到接收设备，并且经由共享无线通信信道同时从发送设备组中的每一个接收相应的数据。

公开(公告)号：US08441968B2

公开(公告)日：2013-05-14

申请号：US12489865

申请日：2009-06-23

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： H04B7/00

CPC分类号： H04L27/2649 ,  H04L1/0072 ,  H04L1/0079 ,  H04L5/0007 ,  H04L5/0092 ,  H04L25/0204 ,  H04L25/022 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2601 ,  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 based on a portion of the received signal. A single carrier signaling portion is received at a first rate, 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 received at the first rate and 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.

摘要翻译： 提供了系统和方法，用于基于接收信号的一部分，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。 以第一速率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。 如果检测结果确定接收信号的有效载荷部分是单载波信号，则以第一速率接收接收信号的有效载荷部分并以单载波模式进行解调，并且接收信号的有效载荷部分被解调为 多载波模式，如果检测确定接收信号的有效载荷部分是多载波信号。

公开(公告)号：US08437440B1

公开(公告)日：2013-05-07

申请号：US12790158

申请日：2010-05-28

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa

IPC分类号： H04L7/00

CPC分类号： H04L27/2602 ,  H04B7/0684 ,  H04L1/0625 ,  H04L1/0675 ,  H04L25/0204 ,  H04L25/0224 ,  H04W28/0263 ,  H04W72/04 ,  H04W72/1263 ,  H04W84/12

摘要： A method for generating a data unit for transmission via a communication channel includes generating a preamble of the data unit, including generating a set of more than four training fields and applying a different spatial mapping to each training field in the set of training fields; and generating a data portion of the data unit, wherein the data portion is transmitted using more than four space-time streams, so that a receiver device can receive the data portion via the more than four space-time streams using channel information derived from the set of training fields.

摘要翻译： 一种用于生成经由通信信道进行传输的数据单元的方法包括生成数据单元的前同步码，包括生成一组多于四个的训练场，并对训练场集合中的每个训练场应用不同的空间映射; 以及生成所述数据单元的数据部分，其中所述数据部分使用多于四个的空时流发送，使得接收机设备可以经由多于四个的空时流从所述多个时空流中导出的信道信息来接收所述数据部分 一套培训领域。

公开(公告)号：US08391397B2

公开(公告)日：2013-03-05

申请号：US13178387

申请日：2011-07-07

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 ,  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 transmitter beamforming technique for use in a MIMO wireless communication system determines a partial description of a reverse channel without determining a full dimensional description of the reverse channel. A correction matrix is developed from the partial description of the reverse channel and a description of the forward channel. The correction matrix is used to process signals to be transmitted via the forward channel, and a steering matrix is used to perform beamforming in the forward channel.

摘要翻译： 用于MIMO无线通信系统的发射机波束成形技术确定反向信道的部分描述，而不确定反向信道的全维度描述。 从反向信道的部分描述和正向信道的描述开发校正矩阵。 校正矩阵用于处理要经由正向信道发送的信号，并且使用导引矩阵来在前向信道中执行波束成形。

公开(公告)号：US08380148B2

公开(公告)日：2013-02-19

申请号：US13452475

申请日：2012-04-20

申请人： Rohit U. Nabar ,  Hongyuan Zhang

发明人： Rohit U. Nabar ,  Hongyuan Zhang

IPC分类号： H01Q11/12 ,  H04B1/04

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 one or more signals to be transmitted via multiple antennas. After the one or more beamsteering matrices are applied to the one or more signals, the plurality of signals is provided to a plurality of power amplifiers coupled to the multiple antennas. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and relative signal energies are determined based on the determined signal energies. Output power levels of the plurality of power amplifiers are adjusted based on the determined relative signal energies.

摘要翻译： 一个或多个波束导向矩阵被施加到要经由多个天线发送的一个或多个信号。 在将一个或多个波束引导矩阵应用于一个或多个信号之后，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确定相对信号能量。 基于确定的相对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：US20120320889A1

公开(公告)日：2012-12-20

申请号：US13494515

申请日：2012-06-12

申请人： Hongyuan Zhang ,  Raja Banerjea ,  Sudhir Srinivasa

发明人： Hongyuan Zhang ,  Raja Banerjea ,  Sudhir Srinivasa

IPC分类号： H04W84/12

CPC分类号： H04L1/004 ,  H04L1/0025 ,  H04L1/0043 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/08 ,  H04L7/048 ,  H04L27/2602 ,  H04L27/2613

摘要： A method includes generating first and second preambles for first and second data units corresponding to first and second PHY modes, respectively. Generating the first preamble includes generating a first STF, LTF, and SIG field. The first SIG field includes an OFDM symbol modulated according to a first modulation technique. The OFDM symbol begins a first time interval, and ends a second time interval, after the first LTF begins. Generating the second preamble includes generating a second STF and LTF. The second STF has a greater duration, and different repeating sequence, than the first STF. The second LTF includes a second OFDM symbol modulated according to a second modulation technique, and at least partially occupying a location beginning a third time interval, and ending a fourth time interval, after the second LTF begins. The third and fourth time intervals are equal to the first and second time intervals, respectively.

摘要翻译： 一种方法包括分别为对应于第一和第二PHY模式的第一和第二数据单元生成第一和第二前导码。 生成第一前同步码包括生成第一STF，LTF和SIG字段。 第一SIG字段包括根据第一调制技术调制的OFDM符号。 OFDM符号开始第一时间间隔，并且在第一LTF开始之后结束第二时间间隔。 生成第二前导码包括生成第二STF和LTF。 第二STF具有比第一STF更长的持续时间和不同的重复序列。 第二LTF包括根据第二调制技术调制的第二OFDM符号，并且至少部分地占据从第三时间间隔开始的位置，并且在第二LTF开始之后结束第四时间间隔。 第三和第四时间间隔分别等于第一和第二时间间隔。