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21. 发明申请

US20130044607A1 LONG RANGE WLAN DATA UNIT FORMAT 有权
标题翻译： LONG RANGE WLAN数据单元格式
公开(公告)号：US20130044607A1
公开(公告)日：2013-02-21
申请号：US13586698
申请日：2012-08-15
申请人： Yong Liu , Harish Ramamurthy , Hongyuan Zhang
发明人： Yong Liu , Harish Ramamurthy , Hongyuan Zhang
IPC分类号： H04W8/26 , H04W24/04
CPC分类号： H04L27/2613 , H04L5/0053 , H04L5/0091 , H04L27/0006 , H04L27/2602 , H04W8/26 , H04W28/06 , H04W72/08 , H04W84/12
摘要： In a method for generating a control data unit a physical layer (PHY) preamble of the control data unit is generated. In generating the PHY preamble, an address field is generated to indicate a communication device for which the data unit is intended, and a frame type field is generated to indicate a type of the control data unit. The address field and the frame type field are included in the PHY preamble. The control data unit is generated to include the PHY preamble. The control data unit is transmitted. The control data unit omits (i) a MAC header, and (iii) a payload.
摘要翻译：在产生控制数据单元的方法中，生成控制数据单元的物理层（PHY）前置码。在生成PHY前导码时，生成地址字段以指示数据单元所针对的通信设备，并且生成帧类型字段以指示控制数据单元的类型。地址字段和帧类型字段包括在PHY前导码中。生成控制数据单元以包括PHY前导码。发送控制数据单元。控制数据单元省略（i）MAC报头，和（iii）有效载荷。

22. 发明授权

US08379745B1 Forward channel variation detection in a wireless communication system 有权
标题翻译：无线通信系统中的前向信道变化检测
公开(公告)号：US08379745B1
公开(公告)日：2013-02-19
申请号：US12168595
申请日：2008-07-07
申请人： Rohit U. Nabar , Hongyuan Zhang , Jungwon Lee
发明人： Rohit U. Nabar , Hongyuan Zhang , Jungwon Lee
IPC分类号： H04B7/02
CPC分类号： H04B7/0456 , H04B7/0617 , H04B7/0619 , H04L1/0003 , H04L1/0009 , H04L25/0222 , H04L25/0228
摘要： A method and apparatus for detecting variations in the forward wireless channel in a wireless communication system. A plurality of reverse channel estimates in a reverse wireless channel are monitored, and a rate of change is measured between the plurality of reverse channel estimates in the reverse wireless channel. A rate of change in the forward wireless channel is estimated from the rate of change between the plurality of reverse channel estimates in the reverse wireless channel. If the estimated rate of change in the forward wireless channel exceeds a threshold, an update of a steering matrix is initiated.
摘要翻译：一种用于检测无线通信系统中的前向无线信道中的变化的方法和装置。监视反向无线信道中的多个反向信道估计，并且在反向无线信道中的多个反向信道估计之间测量变化率。根据反向无线信道中的多个反向信道估计之间的变化率来估计前向无线信道的变化率。如果前向无线信道的估计速率变化超过阈值，则启动导引矩阵的更新。

23. 发明申请

US20130016642A1 COEXISTENCE OF A NORMAL-RATE PHYSICAL LAYER AND A LOW-RATE PHYSICAL LAYER IN A WIRELESS NETWORK 有权
标题翻译：无线网络中正常速率物理层和低速物理层的共存
公开(公告)号：US20130016642A1
公开(公告)日：2013-01-17
申请号：US13550183
申请日：2012-07-16
申请人： Raja Banerjea , Hongyuan Zhang
发明人： Raja Banerjea , Hongyuan Zhang
IPC分类号： H04W4/00 , H04W52/02
CPC分类号： H04W48/06 , H04L27/2602 , H04L27/2613 , H04L27/2692 , H04W48/08 , H04W72/0446 , H04W72/1257 , H04W72/1278 , H04W84/12
摘要： A system including a midamble detection module and a processing module. The midamble detection module is configured to detect a midamble of a packet transmitted via a channel, where the packet includes (i) a preamble, (ii) the midamble, and (iii) a plurality of data fields, where the preamble includes (i) a first short training field, (ii) a first long training field, and (iii) a signal field, where the midamble includes (i) a second short training field and (ii) a second long training field, and where the midamble follows the preamble and is between two or more of the data fields. The processing module is configured to determine that the channel is busy in response to detecting the midamble in the packet.
摘要翻译：一种包括中间码检测模块和处理模块的系统。中间码检测模块被配置为检测经由信道发送的分组的中间码，其中分组包括（i）前同步码，（ii）中间码和（iii）多个数据字段，其中前导码包括（i ）第一短训练场，（ii）第一长训练场，和（iii）信号场，其中中间码包括（i）第二短训练场和（ii）第二长训练场，并且其中，遵循前导码并且在两个或更多个数据字段之间。处理模块被配置为响应于检测到分组中的中间码而确定信道是忙的。

24. 发明申请

US20120324315A1 LOW BANDWIDTH PHY FOR WLAN 有权
标题翻译： WLAN的低带宽PHY
公开(公告)号：US20120324315A1
公开(公告)日：2012-12-20
申请号：US13494505
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： H03M13/05 , G06F11/10
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 data units corresponding to first and second PHY modes, respectively. Generating the first data unit includes FEC encoding first information bits, mapping the FEC-encoded bits to first constellation symbols, and generating first OFDM symbols to include the first constellation symbols. The first OFDM symbols utilize a first tone spacing, and include a first number of non-zero tones collectively spanning a first bandwidth. Generating the second data unit includes FEC encoding second information bits, block encoding the FEC-encoded bits, mapping the block-encoded bits to second constellation symbols, and generating second OFDM symbols to include the second constellation symbols. The second OFDM symbols utilize the first tone spacing, and include a second number of non-zero tones collectively spanning a second bandwidth less than the first bandwidth. The second number of non-zero tones is less than the first number of non-zero tones.
摘要翻译：一种方法包括分别产生对应于第一和第二PHY模式的第一和第二数据单元。生成第一数据单元包括FEC编码第一信息比特，将FEC编码比特映射到第一星座符号，以及生成第一OFDM符号以包括第一星座符号。第一OFDM符号利用第一音调间隔，并且包括共同跨越第一带宽的第一数量的非零音调。产生第二数据单元包括FEC编码第二信息比特，对FEC编码比特进行块编码，将块编码比特映射到第二星座符号，以及生成第二OFDM符号以包括第二星座符号。第二OFDM符号利用第一音调间隔，并且包括共同跨越小于第一带宽的第二带宽的第二数量的非零音调。第二数量的非零音调小于第一个非零音调数。

25. 发明申请

US20120294392A1 SHORT GUARD INTERVAL WITH GREEN FIELD PREAMBLE 有权
标题翻译：短期保护与绿色领域的前景
公开(公告)号：US20120294392A1
公开(公告)日：2012-11-22
申请号：US13465347
申请日：2012-05-07
申请人： Hongyuan ZHANG
发明人： Hongyuan ZHANG
IPC分类号： H04L27/28 , H04W88/02
CPC分类号： H04L27/2607 , H04B1/04 , H04L5/0023 , H04L5/005 , H04L27/2605 , H04L27/2613 , H04L27/2626
摘要： Systems, methods, and other embodiments associated with a single stream wireless communication with a greenfield preamble that uses a short guard interval are described. According to one embodiment, a wireless communication device includes a receiver configured to receive an orthogonal frequency-division multiplexing (OFDM) signal. The OFDM signal includes a greenfield preamble. The wireless communication device includes an interval select logic configured to determine a type of guard intervals in the OFDM signal based, at least in part, on the greenfield preamble. The wireless communication device includes a signal processor configured to process the OFDM signal based, at least in part, on the type of the guard intervals as determined by the interval select logic.
摘要翻译：描述了与使用短保护间隔的绿田前导码的单流无线通信相关联的系统，方法和其他实施例。根据一个实施例，无线通信设备包括被配置为接收正交频分复用（OFDM）信号的接收机。 OFDM信号包括绿场前导码。无线通信设备包括间隔选择逻辑，其被配置为至少部分地基于绿场前导码来确定OFDM信号中的保护间隔的类型。无线通信设备包括被配置为至少部分地基于由间隔选择逻辑确定的保护间隔的类型来处理OFDM信号的信号处理器。

26. 发明申请

US20120294294A1 Preamble Designs for Sub-1GHz Frequency Bands 有权
标题翻译： 1GHz频带的前导码设计
公开(公告)号：US20120294294A1
公开(公告)日：2012-11-22
申请号：US13464467
申请日：2012-05-04
申请人： Hongyuan Zhang
发明人： Hongyuan Zhang
IPC分类号： H04L12/56 , H04W84/12
CPC分类号： H04W72/044 , H04L1/0025 , H04L1/0028 , H04L1/0033 , H04L1/0039 , H04L1/0079 , H04L1/0083 , H04L1/009 , H04L12/56 , H04L29/0653 , H04L69/22 , H04W80/04
摘要： A system including a first preamble generator module configured to generate a first preamble for a first packet, which is a single-user packet. The first preamble includes a first short training field, a first long training field, a first signal field, and a second signal field. A second preamble generator module generates a second preamble for a second packet, which is a multi-user packet formatted as a multi-user packet or a single-user packet formatted as a multi-user packet. The second preamble is longer than the first preamble. The second preamble includes a second short training field, a second long training field, a third signal field, and a fourth signal field. A modulation module modulates at least one of the first signal field and the second signal field of the first preamble differently than at least one of the third signal field and the fourth signal field of the second preamble.
摘要翻译：一种包括第一前同步码生成器模块的系统，被配置为生成作为单用户分组的第一分组的第一前导码。第一前导码包括第一短训练场，第一长训练场，第一信号场和第二信号场。第二前导码生成器模块为第二分组生成第二前导码，第二分组是被格式化为多用户分组的多用户分组或被格式化为多用户分组的单用户分组。第二前导码比第一前导码长。第二前导码包括第二短训练场，第二长训练场，第三信号场和第四信号场。调制模块与第二前同步码的第三信号场和第四信号字段中的至少一个不同地调制第一前同步码的第一信号场和第二信号场中的至少一个。

27. 发明申请

US20120207181A1 EFFICIENT PHYSICAL LAYER PREAMBLE FORMAT 有权
标题翻译：有效的物理层前置格式
公开(公告)号：US20120207181A1
公开(公告)日：2012-08-16
申请号：US13456941
申请日：2012-04-26
申请人： Hongyuan Zhang , Rohit U. Nabar , Songping Wu , Huk-Ling Lou
发明人： Hongyuan Zhang , Rohit U. Nabar , Songping Wu , Huk-Ling Lou
IPC分类号： H04L29/02
CPC分类号： H04B1/707 , H04J13/0014 , H04J13/10 , H04L27/2613 , H04L27/262
摘要： A method for processing a preamble of a data packet, received via a communication channel, using a pair of complementary sequences, wherein a sum of out-of-phase aperiodic autocorrelation coefficients of the pair of complementary sequences is zero, and wherein the preamble includes a first field that provides synchronization information and a second field that provides channel estimation information, includes at least one of (i) correlating a received signal corresponding to the preamble with at least one sequence of the pair of complementary sequences to generate a plurality of respective correlation signals, or (ii) autocorrelating the received signal to generate an autocorrelation signal. The method also includes determining a cover code in the preamble using at least one of (i) the plurality of respective correlation signals, or (ii) the autocorrelation signal. The method also includes using the cover code to decode the preamble.
摘要翻译：一种用于处理经由通信信道，使用一对互补序列接收的数据分组的前导码的方法，其中所述一对互补序列的异相非周期自相关系数的和为零，并且其中所述前同步码包括提供同步信息的第一场和提供信道估计信息的第二场包括以下中的至少一个：（i）将与所述前同步码相对应的接收信号与所述一对互补序列中的至少一个序列相关联以产生多个相应的相关信号，或（ii）自动相关接收的信号以产生自相关信号。该方法还包括使用（i）多个相关相关信号或（ii）自相关信号中的至少一个来确定前导码中的覆盖码。该方法还包括使用覆盖码来解码前导码。

28. 发明申请

US20120202439A1 POWER AMPLIFIER ADJUSTMENT FOR TRANSMIT BEAMFORMING IN MULTI-ANTENNA WIRELESS SYSTEMS 有权
标题翻译：用于多天线无线系统中发射波束的功率放大器调整
公开(公告)号：US20120202439A1
公开(公告)日：2012-08-09
申请号：US13452475
申请日：2012-04-20
申请人： Rohit U. Nabar , Hongyuan Zhang
发明人： Rohit U. Nabar , Hongyuan Zhang
IPC分类号： H04B7/04
CPC分类号： H04B7/0617 , H01Q3/40 , H03F3/245 , H03G3/3042 , H04B7/0408 , H04W16/28
摘要： One or more beamsteering matrices are applied to one or more signals to be transmitted via multiple antennas. After the one or more beamsteering matrices are applied to the one or more signals, the plurality of signals is provided to a plurality of power amplifiers coupled to the multiple antennas. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and relative signal energies are determined based on the determined signal energies. Output power levels of the plurality of power amplifiers are adjusted based on the determined relative signal energies.
摘要翻译：一个或多个波束导向矩阵被施加到要经由多个天线发送的一个或多个信号。在将一个或多个波束引导矩阵应用于一个或多个信号之后，将多个信号提供给耦合到多个天线的多个功率放大器。对于提供给多个功率放大器的多个信号确定信号能量，并且基于所确定的信号能量来确定相对信号能量。基于确定的相对信号能量来调整多个功率放大器的输出功率电平。

29. 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。

30. 发明授权

US08223871B1 Method and apparatus for transmit beamforming 有权
公开(公告)号：US08223871B1
公开(公告)日：2012-07-17
申请号：US12059846
申请日：2008-03-31
申请人： Hongyuan Zhang , Zhiyu Yang
发明人： Hongyuan Zhang , Zhiyu Yang
IPC分类号： H04B7/12 , H04L1/02 , H04L27/00
摘要： A rake receiver having a plurality of rake fingers is adapted based on a plurality of received signals. The plurality of received signals correspond to a single signal transmitted by a single antenna transceiver and received by a multiple antenna transceiver that includes the rake receiver. Each of a plurality of groups of rake fingers corresponds to a single-input, multiple output (SIMO) channel estimate. One coefficient from each of the plurality of SIMO channel estimates is selected, and a transmit steering vector is calculated based on the selected coefficients. The transmit steering vector is applied to a signal to be transmitted by the multiple antenna transceiver to the single antenna transceiver.

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