公开(公告)号：US08175118B2

公开(公告)日：2012-05-08

申请号：US12466997

申请日：2009-05-15

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

IPC分类号： H04J3/24

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

摘要： A method of generating a data unit preamble includes generating a first field associated with at least one of packet synchronization information or frame boundary indication, and generating a second field associated with channel estimation, including generating a first channel estimation sequence (CES) symbol and generating a second CES symbol, so that at least one of 1) a sequence in the first field serves as a cyclic prefix of the first CES symbol, 2) a beginning portion of the second CES symbol serves as a cyclic postfix of the first CES symbol, or 3) an ending portion of the first CES symbol serves as a cyclic prefix of the second CES symbol.

摘要翻译： 一种产生数据单元前导码的方法包括生成与分组同步信息或帧边界指示中的至少一个相关联的第一字段，以及生成与信道估计相关联的第二字段，包括生成第一信道估计序列（CES）符号并产生 第二CES符号的第一个CES符号，使得第一个字段中的序列中的至少一个用作第一个CES符号的循环前缀，2）第二个CES符号的起始部分用作第一个CES符号的循环后缀 ，或3）第一CES符号的结束部分用作第二CES符号的循环前缀。

公开(公告)号：US20090285339A1

公开(公告)日：2009-11-19

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： H04L27/06

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：US20090285319A1

公开(公告)日：2009-11-19

申请号：US12466984

申请日：2009-05-15

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

IPC分类号： H04L27/28 ,  H04L27/00 ,  H04L27/20

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 for transmission via a communication channel includes generating a first field of the preamble using one of a first sequence or a second sequence, such that the first sequence and the second sequence are complementary sequences such that a sum of out-of-phase aperiodic autocorrelation coefficients of the first sequence and the second sequence is zero; generating, using the other one of the first sequence or the second sequence, an indicator of a start of a second field of the preamble, the second field associated with channel estimation information, such that the indicator of the start of the second field immediately follows the first field; and generating the second field of the preamble.

摘要翻译： 一种用于生成用于经由通信信道进行传输的数据单元的前同步码的方法包括使用第一序列或第二序列中的一个生成前导码的第一字段，使得第一序列和第二序列是互补序列，使得 第一序列和第二序列的异相非周期自相关系数的和为零; 使用所述第一序列或所述第二序列中的另一个序列生成所述前导码的第二字段的开始的指示符，所述第二字段与信道估计信息相关联，使得所述第二字段的开始的指示符紧随其后 第一场; 以及产生所述前导码的第二字段。

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：US20120219017A1

公开(公告)日：2012-08-30

申请号：US13465743

申请日：2012-05-07

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou ,  Quan Zhou

IPC分类号： H04B1/709 ,  H04L12/56

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

摘要： A transmitter device includes a controller configured to generate a first field and a second field. The first field is at least one of a packet synchronization information field or a frame boundary indication field, the second field is a channel estimation field starting after the first field ends. The controller is configured to generate the second field at least in part by generating a first channel estimation sequence (CES) symbol and a second CES symbol. At least one of i) a sequence in the first field serves as a cyclic prefix of the first CES symbol, ii) a beginning portion of the second CES symbol serves as a cyclic postfix of the first CES symbol, or iii) an ending portion of the first CES symbol serves as a cyclic prefix of the second CES symbol.

摘要翻译： 发射机设备包括被配置为产生第一场和第二场的控制器。 第一字段是分组同步信息字段或帧边界指示字段中的至少一个，第二字段是在第一字段结束之后开始的信道估计字段。 控制器被配置为至少部分地通过生成第一信道估计序列（CES）符号和第二CES符号来生成第二字段。 i）第一字段中的序列中的至少一个用作第一CES符号的循环前缀，ii）第二CES符号的开始部分用作第一CES符号的循环后缀，或iii）结束部分 的第一个CES符号用作第二个CES符号的循环前缀。

公开(公告)号：US20090285269A1

公开(公告)日：2009-11-19

申请号：US12419460

申请日：2009-04-07

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu

IPC分类号： H04B1/707

CPC分类号： H04W56/001 ,  H04B1/7073 ,  H04B1/70735 ,  H04B2201/7073 ,  H04J13/0014 ,  H04J13/10 ,  H04L5/0016 ,  H04L27/2613 ,  H04L27/262 ,  H04L27/2656 ,  H04L27/2662 ,  H04W56/00

摘要： A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.

摘要翻译： 从通过无线网络发送的数据分组中提取数据的系统和方法包括：接收具有前同步码部分和有效载荷部分的数据分组。 前导码部分与第一已知扩展序列交叉相关，以产生第一定时信号，并且前同步码部分与第二已知扩展信号相互相关，以产生帧定时信号。 在第一定时信号中检测到脉冲，并且基于第一定时信号中检测到的脉冲设置第一定时参数。 在帧定时信号中检测到脉冲，并且基于帧定时信号中检测到的脉冲设置帧定时参数。 根据第一定时参数和帧定时参数从接收到的有效载荷部分提取数据。

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。