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.

公开(公告)号：US08873652B2

公开(公告)日：2014-10-28

申请号：US13246577

申请日：2011-09-27

申请人： Sudhir Srinivasa ,  Hongyuan Zhang

发明人： Sudhir Srinivasa ,  Hongyuan Zhang

IPC分类号： H01K1/10

CPC分类号： H04L1/0643 ,  H04L1/0016 ,  H04L1/0042 ,  H04L5/0044 ,  H04L27/2602 ,  H04L27/2626

摘要： In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a plurality of information bits to be included in the PHY data unit is received. A number of padding bits that need to be added to the information bits such that the information bits, after having been encoded, fill an integer number of orthogonal frequency division multiplexing (OFDM) symbols is determined. The number of padding bits is added to the information bits prior to encoding and the information bits are parsed to a number of encoders. The information bits are encoded to generate coded data bits. A last block of the data unit is encoded differently from the previous blocks. The PHY data unit to include the coded data bits is generated.

摘要翻译： 在通过通信信道生成用于发送的物理层（PHY）数据单元的方法中，接收要包括在PHY数据单元中的多个信息位。 需要添加到信息比特的多个填充比特，使得已经被编码之后的信息比特填满整数个正交频分复用（OFDM）符号。 将填充比特数添加到编码前的信息比特，并将信息比特解析为多个编码器。 信息位被编码以产生编码数据位。 数据单元的最后一个块与先前的块不同的编码。 生成包含编码数据位的PHY数据单元。

公开(公告)号：US08873525B2

公开(公告)日：2014-10-28

申请号：US12959145

申请日：2010-12-02

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

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

IPC分类号： H04W4/00 ,  H04L25/03 ,  H04L25/02

CPC分类号： H04L25/03343 ,  H04L25/0204 ,  H04L25/0228 ,  H04L2025/03426 ,  H04L2025/03802

摘要： One or more stations to provide sounding feedback in response to a training signal sequence are determined, and a schedule for the one or more stations to provide sounding feedback is determined based on capabilities of the one or more stations to transmit sounding feedback at a defined time period after an end of the training signal sequence. A communication frame is generated that includes i) an indication of a request for the plurality of stations to provide sounding feedback corresponding to the training signal sequence, and ii) an indication of when the one or more stations are to transmit sounding feedback. The communication frame is transmitted along with the training sequence.

摘要翻译： 确定响应于训练信号序列提供探测反馈的一个或多个站，并且基于一个或多个站在定义的时间内发送探测反馈的能力来确定用于提供探测反馈的一个或多个站的调度 训练信号序列结束后的周期。 产生通信帧，其包括i）对多个站提供对应于训练信号序列的探测反馈的请求的指示，以及ii）一个或多个站何时发送探测反馈的指示。 通信帧与训练序列一起传输。

公开(公告)号：US08705679B1

公开(公告)日：2014-04-22

申请号：US13053850

申请日：2011-03-22

申请人： Swaroop Venkatesh ,  Sergey Timofeev ,  Sudhir Srinivasa ,  Atul Salhotra ,  Rohit U. Nabar

发明人： Swaroop Venkatesh ,  Sergey Timofeev ,  Sudhir Srinivasa ,  Atul Salhotra ,  Rohit U. Nabar

IPC分类号： H04L7/06

CPC分类号： H04L27/2656 ,  H04L27/2672 ,  H04L27/2675

摘要： In a method for detecting a synchronization field in an orthogonal frequency division multiplexing (OFDM) signal, a plurality of discrete Fourier transform (DFT) values corresponding to the OFDM signal are generated. A plurality of magnitude or power values corresponding to the plurality of DFT values is determined. It is determined whether the plurality of magnitude or power values corresponds to a pattern of magnitude or power values. An indication that the synchronization field is detected in the OFDM signal is generated based on whether it is determined that the plurality of magnitude or power values correspond to the pattern of magnitude or power values.

摘要翻译： 在用于检测正交频分复用（OFDM）信号中的同步字段的方法中，生成与OFDM信号相对应的多个离散付里叶变换（DFT）值。 确定对应于多个DFT值的多个幅度或功率值。 确定多个量值或功率值是否对应于幅度或功率值的图案。 基于是否确定多个量值或功率值对应于幅度或功率值的图案，生成在OFDM信号中检测到同步场的指示。

公开(公告)号：US08699594B2

公开(公告)日：2014-04-15

申请号：US13212440

申请日：2011-08-18

申请人： Yihong Qi ,  Sudhir Srinivasa ,  Hongyuan Zhang

发明人： Yihong Qi ,  Sudhir Srinivasa ,  Hongyuan Zhang

IPC分类号： H04K1/10

CPC分类号： H04B7/046 ,  H04L1/0009 ,  H04L1/0071 ,  H04L1/0643 ,  H04L1/203 ,  H04L5/0046 ,  H04L27/2601

摘要： In a method for interleaving information bits in a physical layer (PHY) data unit, a channel bandwidth to be used for transmitting the PHY data unit is determined and a frequency rotation parameter NROT corresponding to the channel bandwidth is selected. A spatial stream constant is selected for each spatial stream from the set [0, 5, 2, 7, 3, 6, 1, 4] or a subset thereof depending on a number of spatial streams to be utilized, wherein each constant in the set corresponds to a respective spatial stream. Information bits are interleaved according to the selected frequency rotation parameter NROT and the selected spatial stream constant.

摘要翻译： 在用于交织物理层（PHY）数据单元中的信息比特的方法中，确定要用于发送PHY数据单元的信道带宽，并且选择与信道带宽对应的频率旋转参数NROT。 根据要利用的空间流的数量，从集合[0,5,2,7,3,6,1,4]或其子集为每个空间流选择空间流常数，其中， 集合对应于相应的空间流。 信息比特根据所选择的频率旋转参数NROT和所选择的空间流常数进行交织。

公开(公告)号：US08681884B2

公开(公告)日：2014-03-25

申请号：US12846681

申请日：2010-07-29

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

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

IPC分类号： H04L27/28

摘要： In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first set of modulation coding schemes (MCSs) and a second set of MCSs that correspond to a number of spatial streams and a number of encoders are provided. The first set of MCSs correspond to a first channel bandwidth and the second set of MCSs correspond to a second channel bandwidth, and the first set of MCSs is different than the second set of MCSs. An MCS is selected from the first set of MCSs when the PHY data unit is to be transmitted using a channel having the first channel bandwidth, and the MCS is selected from the second set of MCSs when the PHY data unit is to be transmitted using a channel having the second channel bandwidth. Information bits are encoded using the number of encoders and according to the selected MCS, and the encoded information bits are parsed into the number of spatial streams. The encoded information bits are modulated according to the MCS, and a plurality of OFDM symbols are formed based on the modulated encoded information bits.

公开(公告)号：US08665908B1

公开(公告)日：2014-03-04

申请号：US13102727

申请日：2011-05-06

申请人： Hongyuan Zhang ,  Sudhir Srinivasa ,  Yong Liu

发明人： Hongyuan Zhang ,  Sudhir Srinivasa ,  Yong Liu

IPC分类号： H04J3/24 ,  H04Q11/04

CPC分类号： H04W24/02 ,  H04Q11/0478

摘要： In a wireless network in which communication devices are configured to use a first guard interval between symbols or a second guard interval between symbols, wherein the first guard interval has a length shorter than a length of the second guard interval, a field is generated to indicate a set of one or more modulation and coding schemes (MCSs) supported by a first device in the wireless network and to indicate whether each of the one or more MCSs is supported when using the first guard interval. A data unit that includes the field is generated and transmitted to a second device in the wireless network.

摘要翻译： 在其中通信设备被配置为使用符号之间的第一保护间隔或符号之间的第二保护间隔的无线网络中，其中第一保护间隔的长度短于第二保护间隔的长度，生成字段以指示 由无线网络中的第一设备支持的一个或多个调制和编码方案（MCS）的集合，并且在使用第一保护间隔时指示是否支持一个或多个MCS中的每一个。 生成包含该字段的数据单元并将其发送到无线网络中的第二设备。

公开(公告)号：US08571010B1

公开(公告)日：2013-10-29

申请号：US12840260

申请日：2010-07-20

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

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

IPC分类号： H04L12/28

CPC分类号： H04W56/0005 ,  H04B7/0413 ,  H04L1/0004 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/261 ,  H04L29/10 ,  H04W28/18 ,  H04W72/1278 ,  H04W72/1289 ,  H04W84/12

摘要： A method for use in a communication network includes generating a synchronization data unit to be transmitted to a plurality of devices, where the synchronization data unit specifies a space-time mapping parameter, and receiving a plurality of data units via a plurality of antennas, the plurality of data units are transmitted simultaneously from respective ones of the plurality of devices in accordance with the space-time mapping parameter.

摘要翻译： 一种在通信网络中使用的方法包括：生成要发送到多个设备的同步数据单元，其中同步数据单元指定空时映射参数，以及经由多个天线接收多个数据单元， 根据空时映射参数，从多个设备中的相应设备同时发送多个数据单元。

公开(公告)号：US08379757B1

公开(公告)日：2013-02-19

申请号：US12789325

申请日：2010-05-27

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

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

IPC分类号： H04L27/00

CPC分类号： H04L27/2627 ,  H04J3/0697 ,  H04L27/2626 ,  H04L27/2657 ,  H04L27/2675

摘要： Systems and techniques relating to wireless local area network devices include a method involving generating a baseband signal indicative of one or more symbols, modulating the baseband signal at a carrier frequency to produce a modulated signal, transmitting the modulated signal via a wireless channel, and providing a clock signal to control, in the baseband signal, a duration of the one or more symbols. Providing the clock signal can include selectively using a first clock frequency to generate a first baseband signal having a first bandwidth. Providing the clock signal can include selectively using a second, lower clock frequency to generate a second baseband signal having a second, lower bandwidth. The second clock frequency can be used to extend a wireless communication range of the wireless channel.

摘要翻译： 与无线局域网设备相关的系统和技术包括生成表示一个或多个符号的基带信号的方法，以载波频率调制基带信号以产生调制信号，经由无线信道发送调制信号，并提供 在基带信号中控制一个或多个符号的持续时间的时钟信号。 提供时钟信号可以包括选择性地使用第一时钟频率来产生具有第一带宽的第一基带信号。 提供时钟信号可以包括选择性地使用第二较低时钟频率来产生具有第二较低带宽的第二基带信号。 第二时钟频率可以用于扩展无线信道的无线通信范围。

公开(公告)号：US20120320890A1

公开(公告)日：2012-12-20

申请号：US13494527

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, in a communication system utilizing channels for transmitting first PHY mode data units, includes generating first and second data units conforming to first and second PHY modes, respectively, causing the first data unit to be transmitted via a channel, determining a frequency band for transmitting the second data unit, and causing the second data unit to be transmitted via the frequency band. Generating the first and second data units includes generating first and second series of OFDM symbols, respectively. At least a portion of the second OFDM symbols includes more upper-edge than lower-edge guard tones, or vice versa. The frequency band has a bandwidth equal to the channel bandwidth divided by n≧2, and either a lowest or highest sub-band of one or more channels is excluded from the frequency band when the second OFDM symbols include more upper-edge or more lower-edge guard tones, respectively.

摘要翻译： 一种在利用用于发送第一PHY模式数据单元的信道的通信系统中的方法，包括分别产生符合第一和第二PHY模式的第一和第二数据单元，使得经由信道发送第一数据单元，确定频带 用于发送第二数据单元，并且使第二数据单元经由频带发送。 生成第一和第二数据单元包括分别产生第一和第二系列OFDM符号。 第二OFDM符号的至少一部分包括比下边缘保护音更多的上边缘，反之亦然。 频带具有等于信道带宽除以n≥2的带宽，并且当第二OFDM符号包括更多的上边缘或更低的边缘时，从频带中排除一个或多个信道的最低或最高子带 - 保护音，分别。