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61. 发明授权

US08331419B2 Efficient physical layer preamble format 有权
标题翻译：高效的物理层前导码格式
公开(公告)号：US08331419B2
公开(公告)日：2012-12-11
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： H04B1/00
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。

62. 发明授权

US08175119B2 Efficient physical layer preamble format 有权
标题翻译：高效的物理层前导码格式
公开(公告)号：US08175119B2
公开(公告)日：2012-05-08
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： H04J3/24
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。

63. 发明授权

US08165185B2 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：US08165185B2
公开(公告)日：2012-04-24
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。

64. 发明授权

US07995666B1 Frame synchronization method and apparatus 有权
标题翻译：帧同步方法和装置
公开(公告)号：US07995666B1
公开(公告)日：2011-08-09
申请号：US12899928
申请日：2010-10-07
申请人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
发明人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2656 , H04L27/2676
摘要： In a method for synchronizing a receiver to a synchronous signal, in a signal having been processed based on an automatic gain control (AGC) with a varying gain, a symbol is detected. An estimated beginning of a subsequent frame is determined based on the detected symbol. A gain of the AGC is fixed for a period during which the estimated start of the subsequent frame is processed by the AGC. A transform of the signal is analyzed to determine if the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. If the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the gain of the AGC is allowed to resume varying and, a further symbol in the signal is detected, the signal having been processed based on the varying gain of the AGC.
摘要翻译：在用于将接收机同步到同步信号的方法中，在基于具有变化增益的自动增益控制（AGC）处理的信号中，检测到符号。基于检测到的符号确定后续帧的估计开始。 AGC的增益在AGC期间处理后续帧的估计开始的期间是固定的。分析信号的变换以确定后续帧的估计开始是否对应于后续帧的实际开始。如果后续帧的估计开始不对应于后续帧的实际开始，则允许AGC的增益恢复变化，并且检测到信号中的另外的符号，该信号已经根据变化增益AGC。

65. 发明授权

US07983233B2 Apparatus for phase noise suppression for OFDM based WLANS 有权
标题翻译：基于OFDM的WLANS的相位噪声抑制装置
公开(公告)号：US07983233B2
公开(公告)日：2011-07-19
申请号：US11876356
申请日：2007-10-22
申请人： Yeheskel Bar-Ness , Songping Wu
发明人： Yeheskel Bar-Ness , Songping Wu
IPC分类号： H04W4/00
CPC分类号： H04L27/2647 , H04L25/022 , H04L25/03159 , H04L2025/03414 , H04W84/12
摘要： Orthogonal frequency division multiplexing (OFDM) has been specified by IEEE 802.11a standard as the transmission technique for high-rate wireless local area networks (WLANs). Performance of an OFDM system, however, is heavily degraded by random Wiener phase noise, which causes both common phase error (CPE) and inter-carrier interference (ICI). A method and algorithm is disclosed for efficiently eliminating the effect of phase noise in OFDM based WLANs.
摘要翻译： IEEE 802.11a标准规定了正交频分复用（OFDM）作为高速率无线局域网（WLAN）的传输技术。然而，OFDM系统的性能由于随机维纳相位噪声而严重恶化，这导致公共相位误差（CPE）和载波间干扰（ICI）。公开了一种方法和算法，用于有效消除基于OFDM的WLAN中的相位噪声的影响。

66. 发明授权

US07978106B1 Interference detection using a moving window 有权
标题翻译：使用移动窗口进行干扰检测
公开(公告)号：US07978106B1
公开(公告)日：2011-07-12
申请号：US12983794
申请日：2011-01-03
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 , H03M1/84
CPC分类号： H03M1/181 , H03M1/186
摘要： A receiver including an automatic gain control module, a digital signal processor module, and a control module. The automatic gain control module has a gain that varies from a nominal value in response to the receiver 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. In response to the input signal not being an interference signal, the digital signal processor module is configured to process the input signal and generate a second signal. Subsequent to the first signal being generated and prior to the second signal being generated, the control module is configured to determine whether the input signal is an interference signal based on whether the second signal is generated within a predetermined time period subsequent to the first signal being generated.
摘要翻译：一种接收机，包括自动增益控制模块，数字信号处理器模块和控制模块。自动增益控制模块具有响应于接收器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。响应于输入信号不是干扰信号，数字信号处理器模块被配置为处理输入信号并产生第二信号。在产生第一信号之后并且在产生第二信号之前，控制模块被配置为基于在第一信号是在第一信号之后的预定时间段内是否产生第二信号来确定输入信号是否是干扰信号生成。

67. 发明申请

US20100264902A1 DETECTION AND ESTIMATION OF RADIO FREQUENCY VARIATIONS 有权
标题翻译：无线电频率变化的检测和估计
公开(公告)号：US20100264902A1
公开(公告)日：2010-10-21
申请号：US12825775
申请日：2010-06-29
申请人： Bhaskar V. Nallapureddy , Songping Wu , Tsunglun Yu , Hui-Ling Lou
发明人： Bhaskar V. Nallapureddy , Songping Wu , Tsunglun Yu , Hui-Ling Lou
IPC分类号： G01R23/16
CPC分类号： G01S7/021 , G01R23/10
摘要： A system includes a sampling module, a counter module, and a frequency characteristic module. The sampling module samples radio frequency (RF) signals on a first channel for a first predetermined period and a second predetermined period that is subsequent to the first predetermined period. The counter module increments first and second counts when the samples collected during the first and second predetermined periods reverse polarity, respectively. The frequency characteristic module determines a frequency of the RF signal based on at least one of the first and the second counts and determines frequency variation of the RF signal based on the first and second counts.
摘要翻译：系统包括采样模块，计数器模块和频率特征模块。采样模块在第一通道上采样第一预定周期的射频（RF）信号和在第一预定周期之后的第二预定周期。当在第一和第二预定时段期间收集的样本分别反向极性时，计数器模块递增第一和第二计数。频率特性模块基于第一和第二计数中的至少一个来确定RF信号的频率，并且基于第一和第二计数确定RF信号的频率变化。

68. 发明授权

US07813436B1 Frame synchronization method and apparatus 有权
标题翻译：帧同步方法和装置
公开(公告)号：US07813436B1
公开(公告)日：2010-10-12
申请号：US11851115
申请日：2007-09-06
申请人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
发明人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2656 , H04L27/2676
摘要： In a method for synchronizing a receiver to a synchronous signal, a plurality of potential symbols are detected in a signal, the signal having been processed based on automatic gain control (AGC) with a varying gain. Next frame potential symbols corresponding to potential symbols in the plurality of potential symbols are determined, the next frame potential symbols being in frames subsequent to the frames in which the corresponding potential symbols are located. A gain of the AGC is fixed for each corresponding symbol interval during which a next frame potential symbol is operated on by the AGC. In between next frame potential symbols, the AGC is allowed to vary. Next frame potential symbols are analyzed after a transform is calculated to determine if any correspond to a start of a frame.
摘要翻译：在将接收机同步到同步信号的方法中，在信号中检测多个电位符号，该信号已经基于具有变化增益的自动增益控制（AGC）来处理。确定与多个电位符号中的电位符号相对应的下一帧电位符号，下一个电位符号位于相应电位符号位于的帧之后的帧中。对于每个对应的符号间隔，AGC的增益是固定的，在该间隔期间，由AGC操作下一个帧电位符号。在下一帧电势符号之间，允许AGC变化。在计算变换之后分析下一帧电位符号，以确定是否有对应于帧的开始。

69. 发明申请

US20100056062A1 Beamforming by Sector Sweeping 有权
标题翻译：按行业扫描波束成形
公开(公告)号：US20100056062A1
公开(公告)日：2010-03-04
申请号：US12548393
申请日：2009-08-26
申请人： Hongyuan Zhang , Manyuan Shen , Songping Wu , Hui-Lang Lou , Yong Liu
发明人： Hongyuan Zhang , Manyuan Shen , Songping Wu , Hui-Lang Lou , Yong Liu
IPC分类号： H04B7/24
CPC分类号： H04B1/04 , H04B7/0617 , H04B7/063 , H04B7/0632 , H04B7/0684 , H04B7/0695 , H04B7/0848 , H04B7/086 , H04B7/088
摘要： A method for beamforming in a communication system includes receiving a first plurality of training data units via a plurality of antennas, applying a different steering vector as each training data unit is received, generating a first plurality of quality indicators based on the first plurality of received training data units, such that each of the first plurality of quality indicators corresponds to a respective one of the first plurality of received training data units, and selecting a steering vector based on the different steering vectors and the first plurality of quality indicators.
摘要翻译：一种用于在通信系统中的波束成形的方法包括经由多个天线接收第一多个训练数据单元，在接收到每个训练数据单元时应用不同的导向向量，基于所接收的第一多个接收到的第一多个接收到的训练数据单元生成第一多个质量指示符训练数据单元，使得所述第一多个质量指示符中的每一个对应于所述第一多个接收到的训练数据单元中的相应一个，并且基于所述不同的导向向量和所述第一多个质量指示符来选择导向向量。

70. 发明授权

US07623052B1 Strong short-pulse interference detection method 有权
标题翻译：强短脉冲干扰检测方法
公开(公告)号：US07623052B1
公开(公告)日：2009-11-24
申请号：US11501341
申请日：2006-08-09
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 system for detecting interference includes an automatic gain control (AGC) module, a peak detection module, and a control module. The AGC module selectively generates a gain-locked signal when an input signal is received. The peak detector module communicates with the AGC module and selectively generates a peak-detect signal. The control module communicates with the AGC module and the peak detector module and generates a control signal when the control module does not receive the gain-locked signal within a predetermined time after receiving the peak-detect signal.
摘要翻译：用于检测干扰的系统包括自动增益控制（AGC）模块，峰值检测模块和控制模块。当接收到输入信号时，AGC模块选择性地产生增益锁定信号。峰值检测器模块与AGC模块通信，并选择性地产生峰值检测信号。当控制模块在接收到峰值检测信号之后的预定时间内没有接收到增益锁定信号时，控制模块与AGC模块和峰值检测器模块通信并产生控制信号。

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