公开(公告)号：US20090285241A1

公开(公告)日：2009-11-19

申请号：US12467010

申请日：2009-05-15

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： H04L29/02

CPC分类号： H04B1/707 ,  H04J13/0014 ,  H04J13/10 ,  H04L27/2613 ,  H04L27/262

摘要： A method for generating a preamble of a data unit includes generating a short training field (STF) of the preamble to include one of a repeating series of a sequences or a repeating series of b sequences, such that a and b are complementary sequences, a sum of out-of-phase aperiodic autocorrelation coefficients of a and b is zero, and where the STF is associated with at least synchronization information, and generating a long training field (LTF) of the preamble after the STF to include a′ sequences and b′ sequences, such that a′ is the sequence a cyclically shifted by zero or more positions, b′ is the sequence b cyclically shifted by zero or more positions, and where the LTF is associated with channel estimation information.

摘要翻译： 一种用于产生数据单元的前同步码的方法包括：产生前导码的短训练场（STF）以包括序列的重复序列或b序列的重复序列中的一个，使得a和b是互补序列，a a和b的异相非周期自相关系数的和为零，并且其中STF至少与同步信息相关联，并且在STF之后生成前导码的长训练场（LTF）以包括“序列和 b'序列，使得'是循环移位零个或多个位置的序列，b'是循环移位零个或多个位置的序列b，并且其中LTF与信道估计信息相关联。

公开(公告)号：US08885669B2

公开(公告)日：2014-11-11

申请号：US13456941

申请日：2012-04-26

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： H04J3/24 ,  H04L27/26 ,  H04J13/10 ,  H04J13/00 ,  H04B1/707

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。

公开(公告)号：US08599900B2

公开(公告)日：2013-12-03

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。

公开(公告)号：US08385440B2

公开(公告)日：2013-02-26

申请号：US12467022

申请日：2009-05-15

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： H04L27/28

CPC分类号： H04B1/707 ,  H04J13/0014 ,  H04J13/10 ,  H04L27/2613 ,  H04L27/262

摘要： An apparatus includes a signal generator to output one of a first sequence or a second sequence and to augment sequences with cover codes, such that a sum of out-of-phase aperiodic autocorrelation coefficients of the first sequence and the second sequence of is zero, a physical layer preamble controller to control the signal generator to generate a preamble of a data unit, including a short training field (STF) formatter to cause the signal generator to generate an STF for use in at least frame synchronization, and a long training field (LTF) formatter to cause the signal generator to generate an LTF for use in at least channel estimation, such that the STF formatter controls the signal generator to include the first sequence in a last portion of the STF, and the LTF formatter controls the signal generator to include the second sequence in a beginning portion of the LTF.

摘要翻译： 一种装置包括信号发生器，用于输出第一序列或第二序列中的一个序列，并增加具有覆盖码的序列，使得第一序列和第二序列的异相非周期自相关系数之和为零， 物理层前同步码控制器，用于控制信号发生器以产生包括短训练场（STF）格式化器的数据单元的前同步码，以使信号发生器产生用于至少帧同步的STF，以及长训练场 （LTF）格式化器使得信号发生器产生用于至少信道估计的LTF，使得STF格式器控制信号发生器将第一序列包括在STF的最后部分中，并且LTF格式器控制信号 发生器以将第二序列包括在LTF的开始部分中。

公开(公告)号：US08335167B1

公开(公告)日：2012-12-18

申请号：US12698810

申请日：2010-02-02

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Yong Liu ,  Songping Wu

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Yong Liu ,  Songping Wu

IPC分类号： H04B7/00

CPC分类号： H04B7/0617 ,  H04B7/0626 ,  H04B7/0634

摘要： Refining beamforming techniques for use in a communication system. In one embodiment, a method for beamforming in a communication system includes generating multiple training signals to be transmitted via multiple antennas over a communication channel, including applying a different antenna weight vector (AWV) to each of the multiple training signals. The method further includes receiving feedback generated using the multiple training signals, where the feedback includes a transmitter AWV for use with the multiple antennas and/or channel state information (CSI) descriptive of the communication channel.

摘要翻译： 用于通信系统的优化波束成形技术。 在一个实施例中，在通信系统中用于波束成形的方法包括：生成将通过通信信道经由多个天线发送的多个训练信号，包括对多个训练信号中的每一个应用不同的天线权重向量（AWV）。 该方法还包括接收使用多个训练信号产生的反馈，其中反馈包括用于与多个天线一起使用的发射机AWV和/或描述通信信道的信道状态信息（CSI）。

公开(公告)号：US20090252104A1

公开(公告)日：2009-10-08

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： H04W72/00 ,  H04L27/28

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。

公开(公告)号：US08774251B2

公开(公告)日：2014-07-08

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： H04B1/00

CPC分类号： H04L69/22 ,  H04J11/00 ,  H04J13/102 ,  H04L5/0048 ,  H04L27/2613

摘要： A method, implemented in a communication device configured to generate PHY data units corresponding to a first modulation mode and PHY data units corresponding to a second modulation mode, includes generating a PHY data unit having a CEF, including generating a sequence u of the CEF and generating a sequence v of the CEF. Sequence u includes complementary Golay sequences a and b, and is spread with a first cover code. Sequence v includes the complementary Golay sequences a and b, and is spread with a second cover code. The PHY data unit is generated such that sequence u precedes sequence v when the PHY data unit corresponds to the first modulation mode, and sequence v precedes sequence u when the PHY data unit corresponds to the second modulation mode. The method also includes causing the PHY data unit to be transmitted via a communication channel.

摘要翻译： 在被配置为生成对应于第一调制模式的PHY数据单元和对应于第二调制模式的PHY数据单元的通信设备中实现的方法包括生成具有CEF的PHY数据单元，包括生成CEF的序列u，以及 生成CEF的序列v。 序列u包括互补的Golay序列a和b，并且用第一覆盖码扩展。 序列v包括互补的Golay序列a和b，并用第二封面码扩展。 生成PHY数据单元，使得当PHY数据单元对应于第一调制模式时，序列u在序列v之前，并且当PHY数据单元对应于第二调制模式时，序列u在序列u之前。 该方法还包括通过通信信道来传输PHY数据单元。

公开(公告)号：US08441968B2

公开(公告)日：2013-05-14

申请号：US12489865

申请日：2009-06-23

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： H04B7/00

CPC分类号： H04L27/2649 ,  H04L1/0072 ,  H04L1/0079 ,  H04L5/0007 ,  H04L5/0092 ,  H04L25/0204 ,  H04L25/022 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2601 ,  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 based on a portion of the received signal. A single carrier signaling portion is received at a first rate, 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 received at the first rate and 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.

摘要翻译： 提供了系统和方法，用于基于接收信号的一部分，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。 以第一速率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。 如果检测结果确定接收信号的有效载荷部分是单载波信号，则以第一速率接收接收信号的有效载荷部分并以单载波模式进行解调，并且接收信号的有效载荷部分被解调为 多载波模式，如果检测确定接收信号的有效载荷部分是多载波信号。

公开(公告)号：US20100080266A1

公开(公告)日：2010-04-01

申请号：US12569547

申请日：2009-09-29

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 wherein 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 and a first cover code, a method is for generating a physical layer (PHY) data unit that conforms to a second format, wherein the PHY data unit is for transmitting PHY information. A first portion of the PHY data unit is generated to indicate the PHY data unit conforms to the second format, wherein the first portion of the PHY data unit includes an STF spread with at least one of a second spread code different than the first spread code or a second cover code different than the first cover code. A second portion of the PHY data unit is generated according to the second format, wherein 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和第一覆盖码扩展的短训练场（STF），所述方法用于生成 物理层（PHY）数据单元，其符合第二格式，其中PHY数据单元用于发送PHY信息。 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，其中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中的至少一个的STF扩展 或与第一封面代码不同的第二封面代码。 根据第二格式生成PHY数据单元的第二部分，其中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。

公开(公告)号：US09590832B1

公开(公告)日：2017-03-07

申请号：US12552966

申请日：2009-09-02

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Songping Wu

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Songping Wu

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/26 ,  H04L5/00

CPC分类号： H04L27/34 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006 ,  H04L25/0204 ,  H04L25/0262 ,  H04L27/2647 ,  H04L27/2657

摘要： Methods an apparatus for performing sub-carrier adaptation in multi-carrier communication systems. In one embodiment, a method includes receiving, via a reverse communication channel, a first data unit via multiple subcarriers. The method further includes determining an estimate of a forward communication channel based on the received first data unit. The method further includes determining different bit rates for the multiple subcarriers based on the estimate of the forward channel. The method further includes transmitting a second data unit via the multiple subcarriers, where bits in the second data unit are allocated across the multiple subcarriers based on the determined bit rates for the multiple subcarriers.

摘要翻译： 方法一种用于在多载波通信系统中执行子载波适配的装置。 在一个实施例中，一种方法包括经由反向通信信道经由多个子载波接收第一数据单元。 该方法还包括基于所接收的第一数据单元来确定前向通信信道的估计。 该方法还包括基于前向信道的估计来确定多个子载波的不同比特率。 该方法还包括经由多个子载波发送第二数据单元，其中基于多个子载波的所确定的比特率，第二数据单元中的比特在多个子载波上被分配。