公开(公告)号：US09924512B1

公开(公告)日：2018-03-20

申请号：US12730651

申请日：2010-03-24

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

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

IPC分类号： H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04W84/12

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/003 ,  H04W84/12

摘要： A plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks are assigned to a plurality of devices including a first device and a second device. The plurality of OFDM sub-channel blocks includes a first OFDM sub-channel block assigned to the first device and a second OFDM sub-channel block assigned to the second device. Data for the first device and data for the second device are received. OFDM data units are generated, wherein data for the first device is modulated on sub-channels in the first OFDM sub-channel block and data for the second device is modulated on sub-channels in the second OFDM sub-channel block. At least one of the OFDM sub-channel blocks is formatted to substantially conform to a physical layer specification of a WLAN communication protocol having a maximum channel bandwidth smaller than a bandwidth of the generated OFDM data units.

公开(公告)号：US08897394B1

公开(公告)日：2014-11-25

申请号：US12400442

申请日：2009-03-09

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

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

IPC分类号： H03K9/00

CPC分类号： H04W72/085 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0069 ,  H04L5/0085 ,  H04L25/0204 ,  H04L25/0228 ,  H04L27/0008 ,  H04L27/261 ,  H04W24/10 ,  H04W88/06

摘要： Methods and apparatus are provided for adaptively selecting a communications mode in high frequency systems. A first dual-mode device having capabilities of using two or more high frequency communications modes, such as OFDM and SC modulation, may transmit a signal to a second dual-mode device with the same capabilities. The second dual-mode device may compute a channel characteristic associated with a high frequency communications channel and select an optimal high frequency communications mode. The second dual-mode device may transmit information indicative of the channel characteristic or the selected communications mode to the first dual-mode device. The first dual-mode device may select and operate using the optimal high frequency communications mode based on the information received from the second dual-mode device. The first and second dual-mode devices may communicate using the selected high frequency communications mode.

摘要翻译： 提供了用于在高频系统中自适应地选择通信模式的方法和装置。 具有使用诸如OFDM和SC调制之类的两个或多个高频通信模式的能力的第一双模设备可以将信号发送到具有相同能力的第二双模设备。 第二双模设备可以计算与高频通信信道相关联的信道特性，并选择最佳高频通信模式。 第二双模设备可以向第一双模设备发送指示信道特性或所选通信模式的信息。 第一双模设备可以基于从第二双模设备接收的信息，使用最佳高频通信模式来选择和操作。 第一和第二双模式设备可以使用所选择的高频通信模式进行通信。

公开(公告)号：US20130235908A1

公开(公告)日：2013-09-12

申请号：US13771596

申请日：2013-02-20

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

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

IPC分类号： H04B1/707

CPC分类号： H04B1/707 ,  H04J13/0014 ,  H04J13/10 ,  H04L27/2613 ,  H04L27/262

摘要： A circuit for use in a complementary Golay sequence generator or in a complementary Golay sequence correlator includes an input configured to receive an input signal, a set of delay elements, including delay elements corresponding to respective delays of 1, 2, 4, 8, 16, 32, and 64, and a set of multipliers interconnected with the input and the set of delay elements. The set of multipliers is configured to apply weight factors, and the weight factors define the sequence 1,1,−1,1,−1,1,−1. The circuit also includes a pair of outputs configured to output, in response to the input signal, one of (i) a pair of complementary Golay sequences or (ii) a pair of correlation output signals, using (a) the set of delay elements and (b) the set of weight multipliers.

摘要翻译： 用于互补Golay序列发生器或互补Golay序列相关器的电路包括被配置为接收输入信号的输入，一组延迟元件，包括对应于1,2,4,8,16的各个延迟的延迟元件 ，32和64，以及与输入和该组延迟元件互连的一组乘法器。 乘数组被配置为应用权重因子，权重因子定义了序列1,1,1,1,1,1,1。 电路还包括一对输出，其被配置为响应于输入信号输出（i）一对互补格雷序列中的一个或（ii）一对相关输出信号，使用（a）该组延迟元件 和（b）一组权重乘数。

公开(公告)号：US08526892B2

公开(公告)日：2013-09-03

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： H04B1/00 ,  H04B7/00

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：US08358668B2

公开(公告)日：2013-01-22

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： H04J3/16

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：US08331475B1

公开(公告)日：2012-12-11

申请号：US12406587

申请日：2009-03-18

申请人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

发明人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

IPC分类号： H04B7/02 ,  H04L27/28

CPC分类号： H04B7/0413 ,  H04L25/03242 ,  H04L25/03961 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342

摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.

摘要翻译： 用于检测多输入/多输出信号中的数据的系统和方法。 该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。 计算接收到的第二信号与每个可能的第二数据值之间的距离值。 计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。 使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。 基于确定的距离值来确定对数似然比。

公开(公告)号：US08270909B2

公开(公告)日：2012-09-18

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： H04B1/00 ,  H04B7/00

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：US20120207192A1

公开(公告)日：2012-08-16

申请号：US13453609

申请日：2012-04-23

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

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

IPC分类号： H04B1/713

CPC分类号： H04L69/22 ,  H04J11/00 ,  H04J13/102 ,  H04L5/0048 ,  H04L27/2613

摘要： In a wireless communication system wherein communication devices exchange information utilizing data units conforming to a first format, a method for generating a physical layer (PHY) data unit conforming to a second format and used to transmit PHY information includes generating a first sequence u of a channel estimation field (CEF) of the PHY data unit. The first sequence u of the CEF includes complementary Golay sequences a and b and is spread with a first cover code. The method also includes generating a second sequence v of the CEF. The second sequence v follows the first sequence u, includes the complementary Golay sequences a and b, and is spread with a second cover code different than the first cover code. The method also includes generating PHY information elements of the PHY data unit. The PHY information elements are not specified by the first format.

摘要翻译： 在其中通信设备使用符合第一格式的数据单元交换信息的无线通信系统中，用于产生符合第二格式并用于发送PHY信息的物理层（PHY）数据单元的方法包括生成第一序列u PHY数据单元的信道估计字段（CEF）。 CEF的第一个序列u包括互补的Golay序列a和b，并且用第一封面码扩展。 该方法还包括生成CEF的第二序列v。 第二序列v遵循第一序列u，包括互补Golay序列a和b，并用与第一覆盖码不同的第二覆盖码进行扩展。 该方法还包括生成PHY数据单元的PHY信息元素。 PHY信息元素不是由第一格式指定的。

公开(公告)号：US20120201276A1

公开(公告)日：2012-08-09

申请号：US13448847

申请日：2012-04-17

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

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

IPC分类号： H04B1/00

CPC分类号： H04L69/22 ,  H04J11/00 ,  H04J13/102 ,  H04L5/0048 ,  H04L27/2613

摘要： In a wireless communication system in which communication devices exchange information utilizing data units that conform to a first format, wherein the first format includes a short training field (STF) spread with a first spread code, a method for generating a physical layer (PHY) data unit that conforms to a second format includes generating a first portion of the PHY data unit to indicate the PHY data unit conforms to the second format. The first portion of the PHY data unit includes an STF spread with a second spread code different than the first spread code. The method also includes generating a second portion of the PHY data unit according to the second format. The second portion of the PHY data unit includes PHY information elements not specified by the first format.

摘要翻译： 在其中通信设备利用符合第一格式的数据单元来交换信息的无线通信系统中，其中所述第一格式包括利用第一扩展码扩展的短训练场（STF），用于生成物理层（PHY） 符合第二格式的数据单元包括生成PHY数据单元的第一部分以指示PHY数据单元符合第二格式。 PHY数据单元的第一部分包括具有与第一扩展码不同的第二扩展码扩展的STF。 该方法还包括根据第二格式生成PHY数据单元的第二部分。 PHY数据单元的第二部分包括未被第一格式指定的PHY信息元素。

公开(公告)号：US08175118B2

公开(公告)日：2012-05-08

申请号：US12466997

申请日：2009-05-15

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

IPC分类号： H04J3/24

CPC分类号： H04B1/707 ,  H04J13/0014 ,  H04J13/10 ,  H04L27/2613 ,  H04L27/262

摘要： A method of generating a data unit preamble includes generating a first field associated with at least one of packet synchronization information or frame boundary indication, and generating a second field associated with channel estimation, including generating a first channel estimation sequence (CES) symbol and generating a second CES symbol, so that at least one of 1) a sequence in the first field serves as a cyclic prefix of the first CES symbol, 2) a beginning portion of the second CES symbol serves as a cyclic postfix of the first CES symbol, or 3) an ending portion of the first CES symbol serves as a cyclic prefix of the second CES symbol.

摘要翻译： 一种产生数据单元前导码的方法包括生成与分组同步信息或帧边界指示中的至少一个相关联的第一字段，以及生成与信道估计相关联的第二字段，包括生成第一信道估计序列（CES）符号并产生 第二CES符号的第一个CES符号，使得第一个字段中的序列中的至少一个用作第一个CES符号的循环前缀，2）第二个CES符号的起始部分用作第一个CES符号的循环后缀 ，或3）第一CES符号的结束部分用作第二CES符号的循环前缀。