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41. 发明申请

US20130235908A1 APPARATUS FOR GENERATING SPREADING SEQUENCES AND DETERMINING CORRELATION 审中-公开
标题翻译：用于生成扩展序列和确定相关性的装置
公开(公告)号：US20130235908A1
公开(公告)日：2013-09-12
申请号：US13771596
申请日：2013-02-20
申请人： Hongyuan Zhang , Rohit U. Nabar , Songping Wu , Hui-Ling Lou
发明人： Hongyuan Zhang , Rohit U. Nabar , Songping Wu , Hui-Ling Lou
IPC分类号： H04B1/707
CPC分类号： H04B1/707 , H04J13/0014 , H04J13/10 , H04L27/2613 , H04L27/262
摘要： A circuit for use in a complementary Golay sequence generator or in a complementary Golay sequence correlator includes an input configured to receive an input signal, a set of delay elements, including delay elements corresponding to respective delays of 1, 2, 4, 8, 16, 32, and 64, and a set of multipliers interconnected with the input and the set of delay elements. The set of multipliers is configured to apply weight factors, and the weight factors define the sequence 1,1,−1,1,−1,1,−1. The circuit also includes a pair of outputs configured to output, in response to the input signal, one of (i) a pair of complementary Golay sequences or (ii) a pair of correlation output signals, using (a) the set of delay elements and (b) the set of weight multipliers.
摘要翻译：用于互补Golay序列发生器或互补Golay序列相关器的电路包括被配置为接收输入信号的输入，一组延迟元件，包括对应于1,2,4,8,16的各个延迟的延迟元件，32和64，以及与输入和该组延迟元件互连的一组乘法器。乘数组被配置为应用权重因子，权重因子定义了序列1,1,1,1,1,1,1。电路还包括一对输出，其被配置为响应于输入信号输出（i）一对互补格雷序列中的一个或（ii）一对相关输出信号，使用（a）该组延迟元件和（b）一组权重乘数。

42. 发明授权

US08462863B1 Midamble for WLAN PHY frames 有权
标题翻译： Midamble用于WLAN PHY帧
公开(公告)号：US08462863B1
公开(公告)日：2013-06-11
申请号：US12841772
申请日：2010-07-22
申请人： Hongyuan Zhang , Rohit U. Nabar , Sudhir Srinivasa
发明人： Hongyuan Zhang , Rohit U. Nabar , Sudhir Srinivasa
IPC分类号： H04K1/10
CPC分类号： H04L27/2602 , H04L27/2613
摘要： In a method for generating a single data unit for transmission via a communication channel, a preamble and a first portion of a data payload of the single data unit are generated. A midamble is generated, the midamble including at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol that includes calibration information. A second portion of the data payload of the single data unit is generated, and the midamble is included between the first portion of the data payload and the second portion of the data payload.
摘要翻译：在用于生成用于经由通信信道传输的单个数据单元的方法中，生成单个数据单元的数据有效载荷的前导码和第一部分。生成中间码，中间码包括至少一个包括校准信息的OFDM（正交频分复用）符号。产生单个数据单元的数据有效载荷的第二部分，并且中间码被包括在数据有效载荷的第一部分和数据有效载荷的第二部分之间。

43. 发明授权

US08442141B1 Opportunistic beamforming in a wireless communication system 有权
公开(公告)号：US08442141B1
公开(公告)日：2013-05-14
申请号：US12751484
申请日：2010-03-31
申请人： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar
发明人： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/043 , H04B7/0417 , H04L1/06
摘要： A method for processing a preamble of a data unit transmitted via a communication channel includes receiving a signal via a plurality of antennas, applying a plurality of distinct steering vectors to the received signal to generate a plurality of respective outputs, and using the plurality of outputs to perform at least one of carrier sensing and symbol timing synchronization associated with the preamble.

44. 发明授权

US08442138B2 Codebook selection for transmit beamforming 有权
标题翻译：用于发射波束成形的码本选择
公开(公告)号：US08442138B2
公开(公告)日：2013-05-14
申请号：US12044117
申请日：2008-03-07
申请人： Hongyuan Zhang , Rohit U. Nabar
发明人： Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04L5/12 , H04B3/36 , H03M7/40
CPC分类号： H04B7/0417 , H04B7/0634 , H04B7/0639
摘要： A method select a codebook for transmit beamforming. The method constructs an estimated channel matrix based on a codebook, selects a channel submatrix from the estimated channel matrix, calculates a selection matrix from the channel submatrix; and assigns a steering matrix based on the selection matrix. There may be multiple codebooks and the method may construct an estimated channel matrix, select a channel submatrix, and calculate a selection matrix for each of the codebooks, then select an optimal codebook. The steering matrix is assigned based on the optimal codebook. The steering matrix may be used in steering a transmitted packet. The method may also calculate a post-MIMO equalizer signal-to-noise ratio for a data stream, based on the estimated channel matrix and the selected codebook. A related system is also disclosed. Other embodiments are provided, and each of the embodiments described herein can be used alone or in combination with one another.
摘要翻译：一种方法选择用于发送波束成形的码本。该方法构建了基于码本的估计信道矩阵，从估计的信道矩阵中选择一个信道子矩阵，从该信道子矩阵中计算一个选择矩阵; 并根据选择矩阵分配导引矩阵。可以存在多个码本，并且该方法可以构建估计的信道矩阵，选择信道子矩阵，并且计算每个码本的选择矩阵，然后选择最佳码本。基于最佳码本分配指导矩阵。导向矩阵可以用于控制传输的分组。该方法还可以基于估计的信道矩阵和选择的码本计算数据流的后MIMO均衡器信噪比。还公开了相关系统。提供了其它实施例，并且本文所述的每个实施例可以单独使用或彼此组合使用。

45. 发明授权

US08428168B1 Implicit MIMO antenna selection 有权
标题翻译：隐性MIMO天线选择
公开(公告)号：US08428168B1
公开(公告)日：2013-04-23
申请号：US12371367
申请日：2009-02-13
申请人： Hongyuan Zhang , Rohit U. Nabar
发明人： Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04B7/02
CPC分类号： H04B7/061 , H04B7/0417 , H04B7/0626 , H04B7/0691
摘要： A plurality of consecutive sounding data units are received via a reverse link. Each consecutive sounding data unit is received via a different subset of antennas. Channel state information (CSI) is generated based on the received plurality of consecutive sounding data units. A subset of antennas to use in a forward link is determined based on the generated CSI.
摘要翻译：经由反向链路接收多个连续的探测数据单元。经由不同的天线子集接收每个连续的探测数据单元。基于所接收的多个连续的探测数据单元生成信道状态信息（CSI）。基于生成的CSI来确定在前向链路中使用的天线的子集。

46. 发明授权

US08358668B2 Physical layer frame format design for wideband wireless communications systems 有权
标题翻译：宽带无线通信系统的物理层帧格式设计
公开(公告)号：US08358668B2
公开(公告)日：2013-01-22
申请号：US12410883
申请日：2009-03-25
申请人： Hongyuan Zhang , Rohit U. Nabar , Arul Durai Murugan Palanivelu , Hui-Ling Lou , Songping Wu
发明人： Hongyuan Zhang , Rohit U. Nabar , Arul Durai Murugan Palanivelu , Hui-Ling Lou , Songping Wu
IPC分类号： H04J3/16
CPC分类号： H04L27/14 , H04L1/0025 , H04L5/0007 , H04L5/0092 , H04L27/0008 , H04L27/0012 , H04L27/2602
摘要： Systems and methods are provided for processing a payload portion of a received signal in a single carrier mode or a multiple carrier mode using a wireless channel receiver based on a portion of the received signal, where a signaling portion of the received signal is a single carrier signal. A single carrier signaling portion is received, and whether the payload portion of the signal is a single carrier signal or a multiple carrier signal is detected from the received single carrier signaling portion. The payload portion of the received signal is demodulated in a single carrier mode if the detecting determines that the payload portion of the received signal is a single carrier signal, and the payload portion of the received signal is demodulated in a multiple carrier mode if the detecting determines that the payload portion of the received signal is a multiple carrier signal. Data from the demodulated payload portion of the received signal is stored in a computer-readable memory.
摘要翻译：提供了系统和方法，用于基于接收信号的一部分，使用无线信道接收机以单载波模式或多载波模式处理接收信号的有效载荷部分，其中接收信号的信令部分是单载波信号。接收单载波信令部分，以及信号的有效载荷部分是单载波信号还是从所接收的单载波信令部分检测多载波信号。如果检测确定接收信号的有效载荷部分是单载波信号，则以单载波模式解调接收信号的有效载荷部分，并且如果检测到接收信号的有效载荷部分以多载波模式被解调确定接收信号的有效载荷部分是多载波信号。来自接收信号的解调有效载荷部分的数据被存储在计算机可读存储器中。

47. 发明申请

US20120207192A1 PHYSICAL LAYER DATA UNIT FORMAT 有权
标题翻译：物理层数据单元格式
公开(公告)号：US20120207192A1
公开(公告)日：2012-08-16
申请号：US13453609
申请日：2012-04-23
申请人： Hongyuan Zhang , Songping Wu , Hui-Ling Lou , Rohit U. Nabar
发明人： Hongyuan Zhang , Songping Wu , Hui-Ling Lou , Rohit U. Nabar
IPC分类号： H04B1/713
CPC分类号： H04L69/22 , H04J11/00 , H04J13/102 , H04L5/0048 , H04L27/2613
摘要： In a wireless communication system wherein communication devices exchange information utilizing data units conforming to a first format, a method for generating a physical layer (PHY) data unit conforming to a second format and used to transmit PHY information includes generating a first sequence u of a channel estimation field (CEF) of the PHY data unit. The first sequence u of the CEF includes complementary Golay sequences a and b and is spread with a first cover code. The method also includes generating a second sequence v of the CEF. The second sequence v follows the first sequence u, includes the complementary Golay sequences a and b, and is spread with a second cover code different than the first cover code. The method also includes generating PHY information elements of the PHY data unit. The PHY information elements are not specified by the first format.
摘要翻译：在其中通信设备使用符合第一格式的数据单元交换信息的无线通信系统中，用于产生符合第二格式并用于发送PHY信息的物理层（PHY）数据单元的方法包括生成第一序列u PHY数据单元的信道估计字段（CEF）。 CEF的第一个序列u包括互补的Golay序列a和b，并且用第一封面码扩展。该方法还包括生成CEF的第二序列v。第二序列v遵循第一序列u，包括互补Golay序列a和b，并用与第一覆盖码不同的第二覆盖码进行扩展。该方法还包括生成PHY数据单元的PHY信息元素。 PHY信息元素不是由第一格式指定的。

48. 发明申请

US20120201276A1 PHYSICAL LAYER DATA UNIT FORMAT 有权
标题翻译：物理层数据单元格式
公开(公告)号：US20120201276A1
公开(公告)日：2012-08-09
申请号：US13448847
申请日：2012-04-17
申请人： Hongyuan Zhang , Songping Wu , Hui-Ling Lou , Rohit U. Nabar
发明人： Hongyuan Zhang , Songping Wu , Hui-Ling Lou , Rohit U. Nabar
IPC分类号： H04B1/00
CPC分类号： H04L69/22 , H04J11/00 , H04J13/102 , H04L5/0048 , H04L27/2613
摘要： In a wireless communication system in which communication devices exchange information utilizing data units that conform to a first format, wherein the first format includes a short training field (STF) spread with a first spread code, a method for generating a physical layer (PHY) data unit that conforms to a second format includes generating a first portion of the PHY data unit to indicate the PHY data unit conforms to the second format. The first portion of the PHY data unit includes an STF spread with a second spread code different than the first spread code. The method also includes generating a second portion of the PHY data unit according to the second format. The second portion of the PHY data unit includes PHY information elements not specified by the first format.
摘要翻译：在其中通信设备利用符合第一格式的数据单元来交换信息的无线通信系统中，其中所述第一格式包括利用第一扩展码扩展的短训练场（STF），用于生成物理层（PHY）符合第二格式的数据单元包括生成PHY数据单元的第一部分以指示PHY数据单元符合第二格式。 PHY数据单元的第一部分包括具有与第一扩展码不同的第二扩展码扩展的STF。该方法还包括根据第二格式生成PHY数据单元的第二部分。 PHY数据单元的第二部分包括未被第一格式指定的PHY信息元素。

49. 发明授权

US08213540B1 System and method of transmit beam selection 有权
标题翻译：发射波束选择的系统和方法
公开(公告)号：US08213540B1
公开(公告)日：2012-07-03
申请号：US13229955
申请日：2011-09-12
申请人： Jungwon Lee , Hongyuan Zhang , Rohit U. Nabar
发明人： Jungwon Lee , Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04L27/00
CPC分类号： H04L25/0204 , H04B7/0695 , H04L25/0246 , H04L25/03006 , H04L2025/03426
摘要： A system and method of beamforming facilitate beam selection without requiring an exhaustive search. In some implementations, a beamforming technique may select candidate vectors to construct a beamforming matrix without having to compute each matrix element.
摘要翻译：波束成形的系统和方法有助于波束选择，而不需要穷举搜索。在一些实现中，波束形成技术可以选择候选向量来构造波束形成矩阵，而不必计算每个矩阵元素。

50. 发明授权

US08213539B2 Antenna selection and training using a spatial spreading matrix for use in a wireless MIMO communication system 有权
标题翻译：使用空间扩展矩阵在无线MIMO通信系统中使用的天线选择和训练
公开(公告)号：US08213539B2
公开(公告)日：2012-07-03
申请号：US13178312
申请日：2011-07-07
申请人： Hongyuan Zhang , Rohit U. Nabar
发明人： Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04L27/00
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0639 , H04B7/0691 , H04B7/0874 , H04L1/0054 , H04L1/0071 , H04L1/06
摘要： A wireless communication system and method uses a spatial spreading matrix to distribute the encoded spatial data streams to a number of transmit chains and further uses the spatial spreading matrix for antenna selection computation in a transmitter. The spatial spreading matrix is designed such that a receiver is able to know and utilize the spatial spreading matrix for computing transmission antenna selection, receiver antenna selection and joint transmission/receiving antenna selection. The use of this spatial spreading matrix for antenna selection computation provides increased accuracy in antenna selection for transmission of spatial data streams, where the number of spatial data streams is less than the number of transmit or receive chains between the transmitter and receiver, and the number of transmit or receive chains is less than the corresponding transmission or receiving antennas.
摘要翻译：无线通信系统和方法使用空间扩展矩阵将编码的空间数据流分配到多个发射链，并且还在发射机中使用空间扩展矩阵进行天线选择计算。设计空间扩展矩阵，使得接收机能够知道和利用空间扩展矩阵来计算发射天线选择，接收机天线选择和联合发射/接收天线选择。用于天线选择计算的这种空间扩展矩阵的使用在空间数据流的传输的天线选择中提供了更高的精度，其中空间数据流的数量小于发射机和接收机之间的发射或接收链的数量，的发射或接收链小于相应的发射或接收天线。

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