公开(公告)号：US20100248635A1

公开(公告)日：2010-09-30

申请号：US12750636

申请日：2010-03-30

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

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

IPC分类号： H04B15/00 ,  H04B17/00

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0697 ,  H04L5/0048

摘要： The present disclosure includes systems, apparatuses, and techniques relating to wireless local area network devices. Systems, apparatuses, and techniques include communicating with multiple wireless communication devices to determine characteristics of spatial wireless channels, determining steering matrices based on one or more outputs of the communicating, and transmitting signals that concurrently provide data to the wireless communication devices via different spatial wireless channels. The signals can be spatially steered to the wireless communication devices based on the steering matrices.

摘要翻译： 本公开包括与无线局域网设备相关的系统，设备和技术。 系统，设备和技术包括与多个无线通信设备通信以确定空间无线信道的特性，基于通信的一个或多个输出来确定导向矩阵，以及发送通过不同的空间无线连接向无线通信设备提供数据的信号 频道 可以基于导向矩阵将信号空间转向无线通信设备。

公开(公告)号：US20100157955A1

公开(公告)日：2010-06-24

申请号：US12624101

申请日：2009-11-23

申请人： Yong Liu ,  Hongyuan Zhang ,  Raja Banerjea ,  Harish Ramamurthy ,  Hui-Ling Lou

发明人： Yong Liu ,  Hongyuan Zhang ,  Raja Banerjea ,  Harish Ramamurthy ,  Hui-Ling Lou

IPC分类号： H04W72/04 ,  H04L12/26

CPC分类号： H04W72/0446 ,  H04B7/0617 ,  H04B7/0695 ,  H04W48/12 ,  H04W74/002

摘要： A method includes generating a first data unit to be transmitted during a first time period to one or several stations assumed to be beamformed, including determining a time interval that separates the first time period from a second time period, such that a second data unit is transmitted during the second time period to one or several stations assumed to be beamformed, and generating a parameter indicative of the time interval, such that the first data unit includes the parameter.

摘要翻译： 一种方法包括：生成要在第一时间周期期间被发送到被假定为波束形成的一个或多个站的第一数据单元，包括确定将第一时间段与第二时间段分离的时间间隔，使得第二数据单元为 在第二时间段期间被传送到被假定为波束成形的一个或多个站，以及生成指示时间间隔的参数，使得第一数据单元包括该参数。

公开(公告)号：US08982803B1

公开(公告)日：2015-03-17

申请号：US12940413

申请日：2010-11-05

申请人： Hongyuan Zhang ,  Yong Liu ,  Hui-Ling Lou

发明人： Hongyuan Zhang ,  Yong Liu ,  Hui-Ling Lou

IPC分类号： H04W4/00

CPC分类号： H04L1/0003 ,  H04B7/0619 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0031 ,  H04L25/0204 ,  H04L25/0224 ,  H04W24/02 ,  H04W52/262

摘要： A first wireless device includes a transmitter and a receiver. The transmitter is configured to transmit a request for parameters to a second wireless device via a communication channel, wherein the parameters include at least one of (i) an estimated quality of the communication channel and (ii) a modulation and coding scheme (MCS) for transmission via the communication channel. The transmitter is further configured to, based on at least one of the parameters, select a MCS for transmission to the second wireless device via the communication channel. The receiver is configured to receive a response from the second wireless device via the communication channel, wherein the response includes the parameters.

摘要翻译： 第一无线设备包括发射机和接收机。 所述发射机被配置为经由通信信道向第二无线设备发送参数请求，其中所述参数包括以下中的至少一个：（i）所述通信信道的估计质量和（ii）调制和编码方案（MCS） 用于经由通信信道的传输。 发射机还被配置为基于至少一个参数，经由通信信道选择用于传输到第二无线设备的MCS。 接收机被配置为经由通信信道从第二无线设备接收响应，其中响应包括参数。

公开(公告)号：US08879516B2

公开(公告)日：2014-11-04

申请号：US12624101

申请日：2009-11-23

申请人： Yong Liu ,  Hongyuan Zhang ,  Raja Banerjea ,  Harish Ramamurthy ,  Hui-Ling Lou

发明人： Yong Liu ,  Hongyuan Zhang ,  Raja Banerjea ,  Harish Ramamurthy ,  Hui-Ling Lou

IPC分类号： H04W72/04 ,  H04W74/00 ,  H04W48/12 ,  H04B7/06

CPC分类号： H04W72/0446 ,  H04B7/0617 ,  H04B7/0695 ,  H04W48/12 ,  H04W74/002

摘要： A method includes generating a first data unit to be transmitted during a first time period to one or several stations assumed to be beamformed, including determining a time interval that separates the first time period from a second time period, such that a second data unit is transmitted during the second time period to one or several stations assumed to be beamformed, and generating a parameter indicative of the time interval, such that the first data unit includes the parameter.

摘要翻译： 一种方法包括：生成要在第一时间段期间被发送到被假定为波束形成的一个或多个站的第一数据单元，包括确定将第一时间段与第二时间段分离的时间间隔，使得第二数据单元为 在第二时间段期间被传送到被假定为波束成形的一个或多个站，以及生成指示时间间隔的参数，使得第一数据单元包括该参数。

公开(公告)号：US08706039B2

公开(公告)日：2014-04-22

申请号：US12548393

申请日：2009-08-26

申请人： Hongyuan Zhang ,  Manyuan Shen ,  Songping Wu ,  Hui-Ling Lou ,  Yong Liu

发明人： Hongyuan Zhang ,  Manyuan Shen ,  Songping Wu ,  Hui-Ling Lou ,  Yong Liu

IPC分类号： H04B1/00

CPC分类号： H04B1/04 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0684 ,  H04B7/0695 ,  H04B7/0848 ,  H04B7/086 ,  H04B7/088

摘要： A method for beamforming in a communication system includes receiving a first plurality of training data units via a plurality of antennas, applying a different steering vector as each training data unit is received, generating a first plurality of quality indicators based on the first plurality of received training data units, such that each of the first plurality of quality indicators corresponds to a respective one of the first plurality of received training data units, and selecting a steering vector based on the different steering vectors and the first plurality of quality indicators.

摘要翻译： 一种用于在通信系统中的波束成形的方法包括经由多个天线接收第一多个训练数据单元，在接收到每个训练数据单元时应用不同的导向向量，基于所接收的第一多个接收到的第一多个接收到的训练数据单元生成第一多个质量指示符 训练数据单元，使得所述第一多个质量指示符中的每一个对应于所述第一多个接收到的训练数据单元中的相应一个，并且基于所述不同的导向向量和所述第一多个质量指示符来选择导向向量。

公开(公告)号：US08509130B2

公开(公告)日：2013-08-13

申请号：US12709115

申请日：2010-02-19

申请人： Yong Liu ,  Hongyuan Zhang ,  Hui-Ling Lou ,  Raja Banerjea

发明人： Yong Liu ,  Hongyuan Zhang ,  Hui-Ling Lou ,  Raja Banerjea

IPC分类号： H04W4/00

CPC分类号： H04B7/0408 ,  H04B7/0695 ,  H04B7/088

摘要： A method includes generating a first data unit to be transmitted during a first time period, including generating a field that specifies a first number of beamforming training data units that can be communicated during a first training session; processing a second data unit received during a second time period, including determining whether the first training session was accepted based on a first field of the second data unit, and determining a second number of beamforming training data units that can be communicated during a second training session based on a second field of the second data unit; and if the first training session was accepted, causing the specified first number of beamforming training data units to be communicated during the first training session.

摘要翻译： 一种方法包括生成在第一时间段期间要发送的第一数据单元，包括生成指定在第一训练会话期间可以传送的波束形成训练数据单元的第一数量的字段; 处理在第二时间段期间接收的第二数据单元，包括基于所述第二数据单元的第一场确定所述第一训练会话是否被接受，以及确定可以在第二训练期间传送的波束成形训练数据单元的第二数量 会话基于第二数据单元的第二字段; 并且如果第一训练会话被接受，则在第一训练期间导致指定的第一数量的波束形成训练数据单元被通信。

公开(公告)号：US20130003683A1

公开(公告)日：2013-01-03

申请号：US13610654

申请日：2012-09-11

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

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

IPC分类号： H04W72/04

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0697 ,  H04L5/0048

摘要： Systems, apparatuses, and techniques relating to wireless local area network devices are described. A described technique includes transmitting a sounding packet to a wireless communication device(s) to determine characteristics of spatial wireless channels, the sounding packet being based on a spatial mapping matrix; receiving a feedback packet(s) from the device(s), the feedback packet(s) being indicative of one or more feedback matrices, the one or more feedback matrices being derived from wireless channel estimations that are based on received versions of the sounding packet; generating spatially steered data packets based on multiple data streams and one or more steering matrices, which are based on the spatial mapping matrix and the one or more feedback matrices; and transmitting a frame that includes the spatially steered data packets to the device(s). The spatially steered data packets can concurrently provide the streams respectively within the frame to the device(s) via different spatial wireless channels.

摘要翻译： 描述与无线局域网设备相关的系统，设备和技术。 所描述的技术包括向无线通信设备发送探测分组以确定空间无线信道的特性，所述探测分组基于空间映射矩阵; 从所述设备接收反馈分组，所述反馈分组指示一个或多个反馈矩阵，所述一个或多个反馈矩阵从基于所述发声的所接收的版本的无线信道估计导出 包; 基于多个数据流和基于所述空间映射矩阵和所述一个或多个反馈矩阵的一个或多个导向矩阵来生成空间转向数据分组; 以及将包括所述空间转向数据分组的帧发送到所述设备。 空间转向的数据分组可以通过不同的空间无线信道在帧内分别同时提供流到设备的流。

公开(公告)号：US08335167B1

公开(公告)日：2012-12-18

申请号：US12698810

申请日：2010-02-02

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Yong Liu ,  Songping Wu

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Yong Liu ,  Songping Wu

IPC分类号： H04B7/00

CPC分类号： H04B7/0617 ,  H04B7/0626 ,  H04B7/0634

摘要： Refining beamforming techniques for use in a communication system. In one embodiment, a method for beamforming in a communication system includes generating multiple training signals to be transmitted via multiple antennas over a communication channel, including applying a different antenna weight vector (AWV) to each of the multiple training signals. The method further includes receiving feedback generated using the multiple training signals, where the feedback includes a transmitter AWV for use with the multiple antennas and/or channel state information (CSI) descriptive of the communication channel.

摘要翻译： 用于通信系统的优化波束成形技术。 在一个实施例中，在通信系统中用于波束成形的方法包括：生成将通过通信信道经由多个天线发送的多个训练信号，包括对多个训练信号中的每一个应用不同的天线权重向量（AWV）。 该方法还包括接收使用多个训练信号产生的反馈，其中反馈包括用于与多个天线一起使用的发射机AWV和/或描述通信信道的信道状态信息（CSI）。

公开(公告)号：US08195112B1

公开(公告)日：2012-06-05

申请号：US12481884

申请日：2009-06-10

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

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

IPC分类号： H01Q11/12 ,  H04B1/04

CPC分类号： H04W52/225 ,  H04W52/226

摘要： Time-reversal filtering may be used to temporally focus a signal to be transmitted. Power can be reduced at the transmitter so that the temporally focused signal is within spectral mask requirements. In one embodiment, the effect of the time-reversal filter on the power spectral density for a particular transmitted signal can be calculated and the predicted power spectral density can be compared to the permitted spectral mask to identify violations, if any, of the spectral mask. The transmitter power can then be reduced by the amount of the violation. In another embodiment, a set of different time-reversal filters that meet the spectral mask requirements can be provided in advance, and the most appropriate filter—e.g., the one with the best signal-to-noise ratio for the particular signal—can be chosen from the set of filters.

摘要翻译： 可以使用时间反转滤波来暂时聚焦待传输的信号。 在发射机处可以降低功率，使得时间聚焦的信号在频谱掩模要求之内。 在一个实施例中，可以计算时间反转滤波器对于特定发射信号的功率谱密度的影响，并且可以将预测的功率谱密度与允许的光谱掩模进行比较以识别光谱掩模（如果有的话） 。 然后可以将发射机功率减少违规量。 在另一个实施例中，可以预先提供满足频谱掩模要求的一组不同的时间反转滤波器，并且最合适的滤波器（例如，对于特定信号具有最佳信噪比的滤波器）可以是 从一组过滤器中选择。

公开(公告)号：US08184052B1

公开(公告)日：2012-05-22

申请号：US12562782

申请日：2009-09-18

申请人： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

发明人： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC分类号： H01Q3/00 ,  H01Q3/26

CPC分类号： H04B7/0617 ,  H01Q3/2605 ,  H01Q3/40 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/088

摘要： A method for beamforming in a communication system includes receiving a plurality of signals via a plurality of antennas, where the plurality of signals corresponds to at least one known training signal, generating a respective one of a plurality of different antenna weight vectors to be applied to the plurality of antennas as each of the plurality of signals is received, where each of the plurality of antenna weight vectors is a respective base vector of a unitary matrix, and generating a receiver antenna weight vector based on at least the received plurality of signals, the plurality of different antenna weight vectors, and the at least one known training signal.

摘要翻译： 一种用于通信系统中的波束成形的方法包括经由多个天线接收多个信号，其中多个信号对应于至少一个已知的训练信号，产生要应用于多个不同的天线权重向量中的相应一个 接收作为多个信号中的每一个的多个天线，其中多个天线权重向量中的每一个是酉矩阵的相应基本向量，并且至少基于所接收的多个信号生成接收机天线权重向量， 所述多个不同的天线权重向量和所述至少一个已知的训练信号。