公开(公告)号：US08724720B2

公开(公告)日：2014-05-13

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

CPC分类号： H04L1/0005 ,  H04L1/0016 ,  H04L27/2607 ,  H04L27/2608 ,  H04L27/34 ,  H04W84/12

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.

摘要翻译： 在用于生成经由通信信道进行传输的物理层（PHY）数据单元的方法中，与多个空间流和多个编码器相对应的第一组调制编码方案（MCS）和第二组MCS相对应， 提供。 第一组MCS对应于第一信道带宽，并且第二组MCS对应于第二信道带宽，并且第一组MCS不同于第二组MCS。 当要使用具有第一信道带宽的信道来发送PHY数据单元时，从第一组MCS中选择MCS，并且当使用第一组MCS发送PHY数据单元时，从第二组MCS中选择MCS 信道具有第二信道带宽。 使用编码器的数量并根据所选择的MCS对信息比特进行编码，并将编码的信息比特解析为空间流的数量。 编码信息比特根据MCS进行调制，并且基于调制编码信息比特形成多个OFDM符号。

公开(公告)号：US20130259017A1

公开(公告)日：2013-10-03

申请号：US13856277

申请日：2013-04-03

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： H04W84/02

CPC分类号： H04L1/009 ,  H03M13/098 ,  H03M13/655 ,  H04L1/0041 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/0079 ,  H04L5/0007 ,  H04W84/02

摘要： In a method for generating a data unit conforming to a first communication protocol, a first field and a second field to be included in a preamble of the data unit are generated. The first field includes a first set of one or more information bits that indicate a duration of the data unit and is formatted such that the first field allows a receiver device that conforms to a second communication protocol to determine the duration of the data unit. The second field includes a second set of one or more information bits that indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol. The first field and the second field are modulated using a modulation scheme specified for a field corresponding to the first field and the second field, respectively, by the second communication protocol.

摘要翻译： 在用于生成符合第一通信协议的数据单元的方法中，生成要包括在数据单元的前导码中的第一字段和第二字段。 第一字段包括指示数据单元的持续时间并且被格式化的一个或多个信息比特的第一组，使得第一场允许符合第二通信协议的接收机设备确定数据单元的持续时间。 第二字段包括一个或多个信息比特的第二组，其向符合第一通信协议的接收机设备指示数据单元符合第一通信协议。 通过第二通信协议，分别使用针对对应于第一场和第二场的场指定的调制方案来调制第一场和第二场。

公开(公告)号：US20120201316A1

公开(公告)日：2012-08-09

申请号：US13366064

申请日：2012-02-03

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Raja Banerjea ,  Yong Liu ,  Sudhir Srinivasa ,  Hyukjoon Kwon

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Raja Banerjea ,  Yong Liu ,  Sudhir Srinivasa ,  Hyukjoon Kwon

IPC分类号： H04L27/28

CPC分类号： H04L27/2602 ,  H03M13/23 ,  H04L1/0046 ,  H04L1/0065 ,  H04L1/0072 ,  H04L1/08 ,  H04L27/2613 ,  H04L27/265

摘要： In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are encoded using a forward error correction (FEC) encoder. The information bits are mapped to a constellation symbols. Additionally, either the information bits are encoded according to a block coding scheme, or the constellation symbols are encoded according to the block coding scheme. Orthogonal frequency division multiplexing (OFDM) symbols are generated to include the constellation symbols and the PHY data unit is generated to include the OFDM symbols.

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，使用前向纠错（FEC）编码器对要包括在PHY数据单元中的信息比特进行编码。 信息位被映射到星座符号。 另外，根据块编码方案对信息比特进行编码，或者根据块编码方案对星座符号进行编码。 生成正交频分复用（OFDM）符号以包括星座符号，并且生成PHY数据单元以包括OFDM符号。

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：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：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：US20110026623A1

公开(公告)日：2011-02-03

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

CPC分类号： H04L1/0005 ,  H04L1/0016 ,  H04L27/2607 ,  H04L27/2608 ,  H04L27/34 ,  H04W84/12

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.

摘要翻译： 在用于生成经由通信信道进行传输的物理层（PHY）数据单元的方法中，与多个空间流和多个编码器相对应的第一组调制编码方案（MCS）和第二组MCS相对应， 提供。 第一组MCS对应于第一信道带宽，并且第二组MCS对应于第二信道带宽，并且第一组MCS不同于第二组MCS。 当要使用具有第一信道带宽的信道来发送PHY数据单元时，从第一组MCS中选择MCS，并且当使用第一组MCS发送PHY数据单元时，从第二组MCS中选择MCS 信道具有第二信道带宽。 使用编码器的数量并根据所选择的MCS对信息比特进行编码，并将编码的信息比特解析为空间流的数量。 编码信息比特根据MCS进行调制，并且基于调制编码信息比特形成多个OFDM符号。

公开(公告)号：US09209881B2

公开(公告)日：2015-12-08

申请号：US13161209

申请日：2011-06-15

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

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

IPC分类号： H04W16/12 ,  H04B7/06 ,  H04B7/04 ,  H04L25/02 ,  H04W72/04 ,  H04W48/16

CPC分类号： H04W72/0406 ,  H04B7/0434 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0634 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04W48/16 ,  H04W72/046 ,  H04W72/082

摘要： A method in a communication network includes obtaining descriptions of a plurality of communication channels each communication channel associated with a different one of a plurality of receivers; and generating a plurality of steering vectors, one for each of the plurality of receivers, using the descriptions of the plurality of communication channels; wherein each steering vector is used to transmit data to a corresponding one of the plurality receivers via a plurality of antennas and over a corresponding one of the communication channels simultaneously and wherein each steering vector is used to communicate data on a different one of the plurality of communication channels, and wherein each steering vector is generated to reduce interference on a corresponding communication channel caused by simultaneous transmission of data on other communication channels.

摘要翻译： 通信网络中的方法包括：获得与多个接收机中的不同的一个相关联的每个通信信道的多个通信信道的描述; 以及使用所述多个通信信道的描述来生成多个所述多个接收机中的每一个的导向向量; 其中每个导向矢量用于经由多个天线以及通过相应的一个通信信道同时向多个接收机中的相应一个发送数据，并且其中每个导向向量用于在多个接收机中的不同的一个上传送数据 通信信道，并且其中生成每个导向矢量以减少由在其他通信信道上的数据的同时发送而引起的相应通信信道上的干扰。

公开(公告)号：US09021341B1

公开(公告)日：2015-04-28

申请号：US13159143

申请日：2011-06-13

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

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

IPC分类号： H03M13/00 ,  H04L1/00 ,  H03M13/09

CPC分类号： H04L1/0061 ,  H03M13/09 ,  H03M13/1102 ,  H03M13/23 ,  H03M13/618 ,  H03M13/6362 ,  H03M13/6513 ,  H03M13/6516 ,  H03M13/6527 ,  H04L1/0033 ,  H04L1/0057 ,  H04L1/0066 ,  H04L1/0075 ,  H04L1/0091 ,  H04L1/0625

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 are received, and a number of orthogonal frequency division multiplexing (OFDM) symbols that are needed to include the plurality of information bits after encoding with a low density parity check (LDPC) encoder is determined. One or more of a, b, c, and d are performed according to a set of rules so that a receiving device can determine a number of information bits in the PHY data unit based on i) an indication of the number of OFDM symbols, and ii) the set rules: a) adding padding bits and/or shortening bits prior to encoding with the LDPC encoder, b) removing shortening bits after encoding with the LDPC encoder, c) removing parity bits after encoding with the LDPC encoder, d) repeating information and/or parity bits after encoding with the LDPC encoder. The plurality of information bits are encoded using the LDPC encoder. The PHY data unit is generated i) to include the LDPC encoded information bits in OFDM symbols and ii) to include an indication of the number of OFDM symbols in the PHY data unit.

摘要翻译： 在用于生成经由通信信道传输的物理层（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比特，以及多个正交频分复用（OFDM）符号， 需要在用低密度奇偶校验（LDPC）编码器编码之后包括多个信息比特。 根据一组规则执行a，b，c和d中的一个或多个，使得接收设备可以基于i）OFDM符号的数量的指示来确定PHY数据单元中的多个信息比特， 和ii）设置规则：a）在用LDPC编码器进行编码之前，添加填充比特和/或缩短比特，b）在用LDPC编码器进行编码之后，去除缩短比特，c）在用LDPC编码器编码之后去除奇偶校验位，d ）在用LDPC编码器编码之后重复信息和/或奇偶校验位。 使用LDPC编码器对多个信息比特进行编码。 生成PHY数据单元i）在OFDM符号中包含LDPC编码信息比特，以及ii）包括PHY数据单元中的OFDM符号数量的指示。