公开(公告)号：US07924930B1

公开(公告)日：2011-04-12

申请号：US11642442

申请日：2006-12-20

申请人： Atul Salhotra ,  Kedar Shirali ,  Zhiyu Yang ,  Hui-Ling Lou

发明人： Atul Salhotra ,  Kedar Shirali ,  Zhiyu Yang ,  Hui-Ling Lou

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04B7/02 ,  H04L1/02

CPC分类号： H04B7/0857 ,  H04B7/084 ,  H04L2025/03414 ,  H04L2025/03426

摘要： A synchronization module for an orthogonal frequency-division multiplexing (OFDM) receiver system including a signal combination module that generates N combination signals that correspond to N received signals by performing at least one of weighted combining and selection and equal-gain-combining (EGC) on the N signals. A weighted signal generator module generates N weighted signals based on the N combination signals. N is an integer greater than one.

摘要翻译： 一种用于正交频分复用（OFDM）接收机系统的同步模块，包括信号组合模块，其通过执行加权组合和选择以及等增益组合（EGC）中的至少一个来产生对应于N个接收信号的N个组合信号， 对N信号。 加权信号发生器模块基于N个组合信号产生N个加权信号。 N是大于1的整数。

公开(公告)号：US07826812B1

公开(公告)日：2010-11-02

申请号：US12106989

申请日：2008-04-21

申请人： Hui-Ling Lou

发明人： Hui-Ling Lou

IPC分类号： H04B1/16 ,  H04B5/00

CPC分类号： H04B1/1653

摘要： Systems and techniques for digital processing of FM signals include, in at least one aspect, an FM digital processing method including receiving one or more digital signals including a first signal having a first frequency; obtaining a second signal by multiplying the first signal by X to assist in information recovery from the one or more digital signals based on the first signal; filtering the second signal to obtain a high frequency component of the second signal; delaying the second signal to obtain a delayed signal; and generating an output signal based on the high frequency component of the second signal and a normalization factor derived at least in part from the delayed signal.

摘要翻译： FM信号的数字处理的系统和技术在至少一个方面包括FM数字处理方法，其包括接收包括具有第一频率的第一信号的一个或多个数字信号; 通过将第一信号乘以X来获得第二信号，以帮助基于第一信号从一个或多个数字信号恢复信息; 对第二信号进行滤波以获得第二信号的高频分量; 延迟第二信号以获得延迟信号; 以及基于所述第二信号的高频分量产生输出信号，以及至少部分地根据所述延迟信号导出的归一化因子。

公开(公告)号：US20100248635A1

公开(公告)日：2010-09-30

申请号：US12750636

申请日：2010-03-30

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yong Liu

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yong Liu

IPC分类号： H04B15/00 ,  H04B17/00

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0697 ,  H04L5/0048

摘要： The present disclosure includes systems, apparatuses, and techniques relating to wireless local area network devices. Systems, apparatuses, and techniques include communicating with multiple wireless communication devices to determine characteristics of spatial wireless channels, determining steering matrices based on one or more outputs of the communicating, and transmitting signals that concurrently provide data to the wireless communication devices via different spatial wireless channels. The signals can be spatially steered to the wireless communication devices based on the steering matrices.

摘要翻译： 本公开包括与无线局域网设备相关的系统，设备和技术。 系统，设备和技术包括与多个无线通信设备通信以确定空间无线信道的特性，基于通信的一个或多个输出来确定导向矩阵，以及发送通过不同的空间无线连接向无线通信设备提供数据的信号 频道 可以基于导向矩阵将信号空间转向无线通信设备。

公开(公告)号：US07778336B1

公开(公告)日：2010-08-17

申请号：US11199840

申请日：2005-08-09

申请人： Dimitrios-Alexandros Toumpakaris ,  Jungwon Lee ,  Hui-Ling Lou

发明人： Dimitrios-Alexandros Toumpakaris ,  Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04K1/10

CPC分类号： H04L27/2659 ,  H04L27/266 ,  H04L27/2665

摘要： An Orthogonal Frequency Division Multiplexing (OFDM) synchronization module includes a window generator module, a symbol timing estimator module, and a reliability metric calculator. The window generator module generates a sampling window that bounds a plurality of samples of OFDM symbols. The symbol timing estimator module generates an estimated symbol timing from the plurality of samples before a fast Fourier transform operation is performed on the plurality of samples. The reliability metric calculator calculates a reliability metric for the estimated symbol timing based on the estimated symbol timing. The window generator module changes at least one parameter of the sampling window based on the reliability metric.

摘要翻译： 正交频分复用（OFDM）同步模块包括窗口发生器模块，符号定时估计器模块和可靠性度量计算器。 窗口生成器模块生成限定OFDM符号的多个采样的采样窗口。 符号定时估计器模块在对多个样本执行快速傅里叶变换操作之前，从多个样本生成估计符号定时。 可靠性度量计算器基于估计的符号定时计算估计的符号定时的可靠性度量。 窗口生成器模块基于可靠性度量改变采样窗口的至少一个参数。

公开(公告)号：US07773014B1

公开(公告)日：2010-08-10

申请号：US12623799

申请日：2009-11-23

申请人： Songping Wu ,  Yui Lin ,  Hui-Ling Lou

发明人： Songping Wu ,  Yui Lin ,  Hui-Ling Lou

IPC分类号： H03M1/62

CPC分类号： H03G3/3078

摘要： A receiver module includes an automatic gain control module having a gain that varies from a nominal value in response to the receiver module receiving an input signal. The automatic gain control module is configured to generate a first signal in response to the gain settling at a value different from the nominal value. A peak detector module is configured to generate a second signal in response to the gain deviating from the nominal value by a predetermined amount. The peak detector module generates the second signal prior to the automatic gain control module generating the first signal. A control module is configured to receive each of the first signal and the second signal and reset the receiver module to halt processing of the input signal in response to the control module not receiving the first signal within a predetermined amount of time subsequent to the control module receiving the second signal.

摘要翻译： 接收器模块包括自动增益控制模块，其具有响应于接收器模块接收输入信号而从标称值变化的增益。 自动增益控制模块被配置为响应于增益以不同于标称值的值生成第一信号。 峰值检测器模块被配置为响应于偏离标称值的增益而产生第二信号预定量。 峰值检测器模块在自动增益控制模块产生第一信号之前产生第二信号。 控制模块被配置为接收第一信号和第二信号中的每一个并且重置接收器模块以响应于控制模块在控制模块之后的预定时间量内未接收到第一信号而停止输入信号的处理 接收第二信号。

公开(公告)号：US20100157955A1

公开(公告)日：2010-06-24

申请号：US12624101

申请日：2009-11-23

申请人： Yong Liu ,  Hongyuan Zhang ,  Raja Banerjea ,  Harish Ramamurthy ,  Hui-Ling Lou

发明人： Yong Liu ,  Hongyuan Zhang ,  Raja Banerjea ,  Harish Ramamurthy ,  Hui-Ling Lou

IPC分类号： H04W72/04 ,  H04L12/26

CPC分类号： H04W72/0446 ,  H04B7/0617 ,  H04B7/0695 ,  H04W48/12 ,  H04W74/002

摘要： A method includes generating a first data unit to be transmitted during a first time period to one or several stations assumed to be beamformed, including determining a time interval that separates the first time period from a second time period, such that a second data unit is transmitted during the second time period to one or several stations assumed to be beamformed, and generating a parameter indicative of the time interval, such that the first data unit includes the parameter.

摘要翻译： 一种方法包括：生成要在第一时间周期期间被发送到被假定为波束形成的一个或多个站的第一数据单元，包括确定将第一时间段与第二时间段分离的时间间隔，使得第二数据单元为 在第二时间段期间被传送到被假定为波束成形的一个或多个站，以及生成指示时间间隔的参数，使得第一数据单元包括该参数。

公开(公告)号：US07702041B1

公开(公告)日：2010-04-20

申请号：US11510310

申请日：2006-08-25

申请人： Songping Wu ,  Hui-Ling Lou

发明人： Songping Wu ,  Hui-Ling Lou

IPC分类号： H04L27/00

CPC分类号： H04L27/0014 ,  H04L7/042 ,  H04L2027/0046 ,  H04L2027/0067

摘要： The present invention provides for receiving a radio frequency signal which encodes transmitted data, and for outputting data corresponding to the transmitted data. The radio frequency signal is received and converted to inphase and quadrature data. Phase information is extracted from the inphase and quadrature data. A symbol timing for the radio signal is determined based on the extracted phase information. The transmitted data encoded within the radio frequency signal is detected and processed based on the determined symbol timing. Data is output based on the detected and processed transmitted data. Since symbol timing is determined based on phase information, in the phase domain, a radio frequency receiver can be constructed with a lower complexity and a simpler structure.

摘要翻译： 本发明提供接收编码所发送数据的射频信号，以及用于输出对应于发送数据的数据。 射频信号被接收并转换为同相和正交数据。 从同相和正交数据中提取相位信息。 基于所提取的相位信息来确定无线电信号的符号定时。 基于所确定的符号定时检测并处理在射频信号内编码的发送数据。 基于检测到和处理的传输数据输出数据。 由于符号定时是基于相位信息确定的，所以在相位域中，可以以较低的复杂度和较简单的结构来构造射频接收机。

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。