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1. 发明授权

US08705679B1 Method and apparatus for clear channel assessment qualification 有权
标题翻译：渠道评估资格明确的方法和装置
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。

2. 发明授权

US08826108B1 Pre-scaling soft-decoder inputs 有权
标题翻译：预缩放软解码器输入
公开(公告)号：US08826108B1
公开(公告)日：2014-09-02
申请号：US13287846
申请日：2011-11-02
申请人： Li Zhang , Sudhir Srinivasa , Hongyuan Zhang , Rohit U Nabar , Atul Salhotra
发明人： Li Zhang , Sudhir Srinivasa , Hongyuan Zhang , Rohit U Nabar , Atul Salhotra
IPC分类号： H03M13/03
CPC分类号： H03M13/6591 , H03M13/1111 , H03M13/612 , H03M13/6527 , H03M13/658 , H03M13/6583
摘要： The present disclosure describes techniques for pre-scaling decoder input values. In some aspects a soft-decoding input indicating a reliability of an encoded bit is received, the soft-decoding input is scaled based on a value of the soft-decoding input, and a hardware-based soft-decoder is enabled to use the scaled soft-decoding input to decode the encoded bit. By so doing, resolution of the soft-decoding input can be preserved during subsequent decoding operations improving performance of the hardware-based soft-decoder.
摘要翻译：本公开描述了用于预分解解码器输入值的技术。在一些方面，接收到指示编码比特的可靠性的软解码输入，基于软解码输入的值对软解码输入进行缩放，并且基于硬件的软解码器能够使用经缩放的软解码输入来解码编码位。通过这样做，可以在随后的解码操作期间保持软解码输入的分辨率，从而提高基于硬件的软解码器的性能。

3. 发明授权

US09655002B2 Physical layer frame format for WLAN 有权
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.

4. 发明授权

US08681884B2 Methods and apparatus for WLAN transmission 有权
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.

5. 发明授权

US08571010B1 Simultaneous uplink transmission in a wireless network 有权
标题翻译：在无线网络中同时进行上行链路传输
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。

6. 发明授权

US08379757B1 Narrow-band OFDM mode for WLAN 有权
标题翻译：用于WLAN的窄带OFDM模式
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。

7. 发明申请

US20110026623A1 Methods and Apparatus for WLAN Transmission 有权
标题翻译： WLAN传输方法与装置
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。

8. 发明授权

US08724720B2 Methods and apparatus for WLAN transmission 有权
标题翻译： WLAN传输的方法和装置
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。

9. 发明申请

US20130259017A1 Physical Layer Frame Format for WLAN 有权
标题翻译： WLAN的物理层帧格式
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。

10. 发明申请

US20120201316A1 Control Mode PHY for WLAN 有权
标题翻译： WLAN的控制模式PHY
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。

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