公开(公告)号：US09397785B1

公开(公告)日：2016-07-19

申请号：US13085134

申请日：2011-04-12

申请人： Hongyuan Zhang ,  Sudhir Srinivasa

发明人： Hongyuan Zhang ,  Sudhir Srinivasa

IPC分类号： H04L1/00

CPC分类号： H04L69/22 ,  H04L1/0041 ,  H04L1/0061 ,  H04L1/0072 ,  H04L43/0823 ,  H04W28/06 ,  H04W84/12

摘要： In a method for generating data units for transmission via a wireless network, a first signal field that includes formatting information for a data unit is generated, and a CRC field for the first signal field is generated according to a generator polynomial. Further, a second signal field that includes formatting information for the data unit is generated, and a CRC field for the second signal field is generated according to the generator polynomial. Further, the data unit is generated to include i) the CRC for the second signal field and ii) a preamble having a) the first signal field, b) the CRC for the first signal field, and c) the second signal field.

摘要翻译： 在通过无线网络生成用于发送的数据单元的方法中，生成包括数据单元的格式化信息的第一信号字段，并且根据生成多项式生成用于第一信号字段的CRC字段。 此外，生成包括数据单元的格式化信息的第二信号字段，并且根据生成多项式生成用于第二信号字段的CRC字段。 此外，生成数据单元以包括i）第二信号字段的CRC，以及ii）具有a）第一信号字段的前同步码，b）第一信号字段的CRC，以及c）第二信号字段。

公开(公告)号：US09391742B2

公开(公告)日：2016-07-12

申请号：US13207003

申请日：2011-08-10

申请人： Sudhir Srinivasa ,  Hongyuan Zhang ,  Hyukjoon Kwon

发明人： Sudhir Srinivasa ,  Hongyuan Zhang ,  Hyukjoon Kwon

IPC分类号： H04L27/28 ,  H04L1/06 ,  H04B7/04 ,  H04L5/00 ,  H04L25/02

CPC分类号： H04L25/0206 ,  H04B7/0417 ,  H04L1/0693 ,  H04L5/0005 ,  H04L5/0023 ,  H04L25/0202 ,  H04L25/022

摘要： In a method for estimating a channel between a transmitter and a receiver in a communication network, a plurality of training signal fields are received at the receiver. Each training signal field includes a plurality of orthogonal frequency division multiplexing (OFDM) tones, and the OFDM tones include at least a plurality of training data tones and one or more pilot tones. Channel estimate data corresponding to the plurality of training data tones and the one or more pilot tones is determined. Channel estimate data corresponding to only a subset of the OFDM tones or data generated using the channel estimate data corresponding to the subset of OFDM tones is transmitted to the transmitter, wherein the subset excludes pilot tones.

摘要翻译： 在通信网络中用于估计发射机和接收机之间的信道的方法中，在接收机处接收多个训练信号字段。 每个训练信号字段包括多个正交频分复用（OFDM）音调，并且OFDM音调包括至少多个训练数据音调和一个或多个导频音调。 确定对应于多个训练数据音调和一个或多个导频音调的信道估计数据。 仅对应于OFDM音调的子集的频道估计数据或使用对应于OFDM音调的子集的信道估计数据生成的数据被发送到发射机，其中该子集排除导频音调。

公开(公告)号：US08971167B1

公开(公告)日：2015-03-03

申请号：US13439623

申请日：2012-04-04

申请人： Sudhir Srinivasa ,  Hongyuan Zhang

发明人： Sudhir Srinivasa ,  Hongyuan Zhang

IPC分类号： H04J11/00 ,  H04L27/26

CPC分类号： H04L27/2608 ,  H04L1/0003 ,  H04L1/0042 ,  H04L1/007 ,  H04L1/0643 ,  H04L5/0046

摘要： A physical layer (PHY) data unit is generated for transmission via a communication channel in accordance with a transmission configuration. The transmission configuration corresponds to at least one of (i) one or more particular numbers of spatial streams, and (ii) one or more particular channel bandwidths. A number of orthogonal frequency division multiplexing (OFDM) symbols to be included in a payload of the PHY data unit is determined based on (i) determining the number of OFDM symbols according to a first technique when using a modulation and coding scheme (MCS) from a set of MCSs allowed for the transmission configuration, and (ii) determining the number of OFDM symbols according to a second technique when using an MCS excluded from the set of MCSs allowed for the transmission configuration.

摘要翻译： 生成物理层（PHY）数据单元，用于根据传输配置经由​​通信信道进行传输。 传输配置对应于（i）一个或多个特定数量的空间流中的至少一个，以及（ii）一个或多个特定信道带宽。 基于（i）当使用调制和编码方案（MCS）时根据第一技术确定OFDM符号的数量来确定要包括在PHY数据单元的有效载荷中的多个正交频分复用（OFDM）符号， 从一组允许传输配置的MCS，以及（ii）当使用从允许传输配置的MCS集合中排除的MCS时，根据第二种技术确定OFDM符号的数量。

公开(公告)号：US08891435B2

公开(公告)日：2014-11-18

申请号：US13494515

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： H04B7/204 ,  H04W4/00 ,  H04J1/00 ,  H04L1/08 ,  H04L1/00 ,  H04L27/26

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 includes generating first and second preambles for first and second data units corresponding to first and second PHY modes, respectively. Generating the first preamble includes generating a first STF, LTF, and SIG field. The first SIG field includes an OFDM symbol modulated according to a first modulation technique. The OFDM symbol begins a first time interval, and ends a second time interval, after the first LTF begins. Generating the second preamble includes generating a second STF and LTF. The second STF has a greater duration, and different repeating sequence, than the first STF. The second LTF includes a second OFDM symbol modulated according to a second modulation technique, and at least partially occupying a location beginning a third time interval, and ending a fourth time interval, after the second LTF begins. The third and fourth time intervals are equal to the first and second time intervals, respectively.

摘要翻译： 一种方法包括分别为对应于第一和第二PHY模式的第一和第二数据单元生成第一和第二前导码。 生成第一前同步码包括生成第一STF，LTF和SIG字段。 第一SIG字段包括根据第一调制技术调制的OFDM符号。 OFDM符号开始第一时间间隔，并且在第一LTF开始之后结束第二时间间隔。 生成第二前导码包括生成第二STF和LTF。 第二STF具有比第一STF更长的持续时间和不同的重复序列。 第二LTF包括根据第二调制技术调制的第二OFDM符号，并且至少部分地占据从第三时间间隔开始的位置，并且在第二LTF开始之后结束第四时间间隔。 第三和第四时间间隔分别等于第一和第二时间间隔。

公开(公告)号：US08731090B2

公开(公告)日：2014-05-20

申请号：US13252710

申请日：2011-10-04

申请人： Hongyuan Zhang ,  Sudhir Srinivasa ,  Hyukjoon Kwon ,  Raja Banerjea

发明人： Hongyuan Zhang ,  Sudhir Srinivasa ,  Hyukjoon Kwon ,  Raja Banerjea

IPC分类号： H04B7/02

CPC分类号： H04L27/2646 ,  H04B7/0617 ,  H04B7/066 ,  H04L1/06 ,  H04L1/0618 ,  H04L1/0693 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0057 ,  H04L25/0204 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03808 ,  H04W24/10

摘要： In a method for transmitting channel feedback data from a receiver to a transmitter, channel data for a plurality of orthogonal frequency division multiplexing (OFDM) tones for one or more spatial streams corresponding to a communication channel is determined. A plurality of angle values associated with the one or more spatial streams and one or more OFDM tones is determined. For each of the one or more spatial streams, a per-tone signal to noise ratio (PT-SNR) associated with one or more OFDM tones is determined, and an average signal to noise ratio (avg-SNR) is determined by averaging the signal to noise ratio (SNR) values. A feedback report is generated to include at least i) the plurality of angle values, ii) the PT-SNRs, and iii) the avg-SNR. The feedback report is included in a data unit to be transmitted from the receiver to the transmitter.

摘要翻译： 在从接收机向发射机发送信道反馈数据的方法中，确定用于与通信信道对应的一个或多个空间流的多个正交频分复用（OFDM）音调的信道数据。 确定与一个或多个空间流和一个或多个OFDM音调相关联的多个角度值。 对于一个或多个空间流中的每一个，确定与一个或多个OFDM音调相关联的每音调信噪比（PT-SNR），并且通过对平均信噪比（avg-SNR）进行平均来确定平均信噪比 信噪比（SNR）值。 生成反馈报告至少包括i）多个角度值，ii）PT-SNR，以及iii）平均SNR。 反馈报告被包括在要从接收机发射到发射机的数据单元中。

公开(公告)号：US08599803B1

公开(公告)日：2013-12-03

申请号：US12772783

申请日：2010-05-03

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

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

IPC分类号： H04Q7/24

CPC分类号： H04W84/02 ,  H04J11/00 ,  H04L1/0643 ,  H04L27/2626

摘要： In a method for transmitting information in a wireless local area network (WLAN), a plurality of different data streams corresponding to a plurality of different devices are orthogonally multiplexed onto a single symbol stream without using channel state information corresponding to a plurality of channels between a transmitting device and the plurality of different devices. One or more transmit streams are generated using the single symbol stream.

公开(公告)号：US20120087436A1

公开(公告)日：2012-04-12

申请号：US13250661

申请日：2011-09-30

申请人： Sudhir Srinivasa ,  Hongyuan Zhang

发明人： Sudhir Srinivasa ,  Hongyuan Zhang

IPC分类号： H04L27/00

CPC分类号： H04L5/0044 ,  H04L1/0057 ,  H04L1/0059 ,  H04L5/0023

摘要： In a method for generating an orthogonal frequency division multiplexing (OFDM) symbol to be included in a PHY data unit for transmission via a communication channel, wherein the OFDM symbol includes a plurality of OFDM tones, information bits to be included in the OFDM symbol are encoded to generate encoded information bits. The encoded information bits are parsed into a plurality of spatial streams. The spatial streams, or space-time streams generated from the spatial streams, are mapped to transmit chains using a plurality of spatial mapping matrices corresponding to the plurality of OFDM tones. Additionally, one of i) reordering OFDM tones before spatial mapping is applied, or ii) reordering OFDM tones after spatial stream mapping is applied and reordering spatial mapping matrices to match the reordered OFDM tones is performed. The OFDM symbol to be included in the PHY data unit is generated.

摘要翻译： 在用于生成要包括在PHY数据单元中以用于经由通信信道进行传输的正交频分复用（OFDM）符号的方法中，其中OFDM符号包括多个OFDM音调，要包括在OFDM符号中的信息比特是 编码以生成编码信息比特。 经编码的信息比特被解析为多个空间流。 从空间流生成的空间流或时空流被映射到使用与多个OFDM音调对应的多个空间映射矩阵来发送链。 另外，i）在应用空间映射之前重新排序OFDM音调，或者ii）在应用空间流映射之后重新排序OFDM音调，并且执行重排序空间映射矩阵以匹配重新排序的OFDM音调。 生成要包括在PHY数据单元中的OFDM符号。

公开(公告)号：US20120008643A1

公开(公告)日：2012-01-12

申请号：US13177236

申请日：2011-07-06

申请人： Hongyuan Zhang ,  Sudhir Srinivasa

发明人： Hongyuan Zhang ,  Sudhir Srinivasa

IPC分类号： H04L12/02

CPC分类号： H04L27/2607 ,  H04B7/0671 ,  H04L27/261

摘要： A system including a training field generator module, a stream generator module, and a cyclic shift delay module. The training field generator module generates training fields to be transmitted in a packet to client stations. The stream generator module generates streams to be transmitted in the packet. First streams (i) are designated for a first client station and (ii) include the training fields. Second streams (i) are designated for a second client station and (ii) include the training fields. The cyclic shift delay module applies cyclic shift delay values to the streams. First cyclic shift delay values are respectively applied to the first streams. Second cyclic shift delay values are respectively applied to the second streams. At least one of the second cyclic shift delay values is equal to one of the first cyclic shift delay values. Alternatively, the second values are different than the first values.

摘要翻译： 一种包括训练场发生器模块，流发生器模块和循环移位延迟模块的系统。 训练场发生器模块产生要在分组中传送到客户站的训练场。 流生成器模块生成要在分组中传输的流。 第一流（i）被指定用于第一客户站，（ii）包括训练场。 第二流（i）被指定用于第二客户站，（ii）包括训练场。 循环移位延迟模块将循环移位延迟值应用于流。 第一循环移位延迟值分别应用于第一流。 第二循环移位延迟值分别应用于第二流。 第二循环移位延迟值中的至少一个等于第一循环移位延迟值之一。 或者，第二值不同于第一值。

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。

公开(公告)号：US08660497B1

公开(公告)日：2014-02-25

申请号：US12855521

申请日：2010-08-12

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

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

IPC分类号： H04B1/00

CPC分类号： H04B7/0613 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04W84/12

摘要： A method in a communication network includes obtaining a description of a first communication channel associated with a first receiver; obtaining a description of a second communication channel associated with a second receiver; and generating a steering vector using each of the description of the first communication channel and the description of the second communication channel; where the steering vector is used to transmit first data to the first receiver via a plurality of antennas over the first communication channel simultaneously with second data being transmitted to the second receiver via the plurality of antennas over the second communication channel.

摘要翻译： 通信网络中的方法包括获得与第一接收机相关联的第一通信信道的描述; 获得与第二接收机相关联的第二通信信道的描述; 以及使用所述第一通信信道的描述和所述第二通信信道的描述来生成导向向量; 其中所述导向向量用于经由所述第一通信信道上的多个天线将第一数据发送到所述第一接收机，同时所述第二数据经由所述第二通信信道经由所述多个天线发送到所述第二接收机。