公开(公告)号：US08050643B1

公开(公告)日：2011-11-01

申请号：US12118357

申请日：2008-05-09

申请人： Songping Wu ,  Hua Qian ,  Gang Liu ,  King Chun Tsai ,  Lawrence Tse ,  Hui-Ling Lou

发明人： Songping Wu ,  Hua Qian ,  Gang Liu ,  King Chun Tsai ,  Lawrence Tse ,  Hui-Ling Lou

IPC分类号： H04B7/00

CPC分类号： H04W52/52 ,  H03G3/3068

摘要： In a method and system for controlling gain in an RF receiver, an RF signal is analyzed over different attack and decay windows, from which the receiver determines (1) if the signal is in an attack condition with dip values below a threshold level thus indicating a need for increasing signal gain, or (2) if the signal is in a decay condition with threshold values above a threshold level thus indicating a need for decreasing signal gain. The receiver applies attack and decay windows of different sizes and in an asynchronous manner to create a gain control scheme that is insensitive to transient effects such as channel interference and deep fading that affect the intensities of an in-band signal.

摘要翻译： 在用于控制RF接收机中的增益的方法和系统中，通过不同的攻击和衰减窗口分析RF信号，接收机从该接收机确定（1）如果信号处于攻击条件，其中dip值低于阈值水平，因此指示 增加信号增益的需要，或者（2）如果信号处于具有高于阈值电平的阈值的衰减条件，从而指示需要降低信号增益。 接收机以异步方式应用不同大小的攻击和衰减窗口，以创建一种对影响带内信号强度的信道干扰和深衰落等瞬态效应不敏感的增益控制方案。

公开(公告)号：US08488698B1

公开(公告)日：2013-07-16

申请号：US13194093

申请日：2011-07-29

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。

公开(公告)号：US08477813B2

公开(公告)日：2013-07-02

申请号：US12548205

申请日：2009-08-26

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

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

IPC分类号： H04J3/06

CPC分类号： H04W16/28 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2025/03426 ,  H04L2025/03789 ,  H04L2025/03815

摘要： In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, a beamforming training (BFT) data unit that conforms to a second format is transmitted, wherein a length of the BFT data unit is shorter than lengths supported by the first format, wherein the BFT data unit is for transmitting PHY beamforming training information. Information to indicate the BFT data unit conforms to the second format is transmitted to a receiving device. The BFT data unit is generated according to the second format, wherein the BFT data unit includes BFT information elements. The BFT data unit is then transmitted to the receiving device.

摘要翻译： 在其中通信设备利用符合第一格式的数据单元交换信息的无线通信系统中，发送符合第二格式的波束形成训练（BFT）数据单元，其中所述BFT数据单元的长度短于所支持的长度 通过第一格式，其中BFT数据单元用于发送PHY波束形成训练信息。 用于指示符合第二格式的BFT数据单元的信息被发送到接收设备。 BFT数据单元根据第二格式生成，其中BFT数据单元包括BFT信息元素。 然后将BFT数据单元发送到接收设备。

公开(公告)号：US08195112B1

公开(公告)日：2012-06-05

申请号：US12481884

申请日：2009-06-10

申请人： Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou

发明人： Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Rohit U. Nabar ,  Songping Wu ,  Hui-Ling Lou

IPC分类号： H01Q11/12 ,  H04B1/04

CPC分类号： H04W52/225 ,  H04W52/226

摘要： Time-reversal filtering may be used to temporally focus a signal to be transmitted. Power can be reduced at the transmitter so that the temporally focused signal is within spectral mask requirements. In one embodiment, the effect of the time-reversal filter on the power spectral density for a particular transmitted signal can be calculated and the predicted power spectral density can be compared to the permitted spectral mask to identify violations, if any, of the spectral mask. The transmitter power can then be reduced by the amount of the violation. In another embodiment, a set of different time-reversal filters that meet the spectral mask requirements can be provided in advance, and the most appropriate filter—e.g., the one with the best signal-to-noise ratio for the particular signal—can be chosen from the set of filters.

摘要翻译： 可以使用时间反转滤波来暂时聚焦待传输的信号。 在发射机处可以降低功率，使得时间聚焦的信号在频谱掩模要求之内。 在一个实施例中，可以计算时间反转滤波器对于特定发射信号的功率谱密度的影响，并且可以将预测的功率谱密度与允许的光谱掩模进行比较以识别光谱掩模（如果有的话） 。 然后可以将发射机功率减少违规量。 在另一个实施例中，可以预先提供满足频谱掩模要求的一组不同的时间反转滤波器，并且最合适的滤波器（例如，对于特定信号具有最佳信噪比的滤波器）可以是 从一组过滤器中选择。

公开(公告)号：US08184052B1

公开(公告)日：2012-05-22

申请号：US12562782

申请日：2009-09-18

申请人： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

发明人： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC分类号： H01Q3/00 ,  H01Q3/26

CPC分类号： H04B7/0617 ,  H01Q3/2605 ,  H01Q3/40 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/088

摘要： A method for beamforming in a communication system includes receiving a plurality of signals via a plurality of antennas, where the plurality of signals corresponds to at least one known training signal, generating a respective one of a plurality of different antenna weight vectors to be applied to the plurality of antennas as each of the plurality of signals is received, where each of the plurality of antenna weight vectors is a respective base vector of a unitary matrix, and generating a receiver antenna weight vector based on at least the received plurality of signals, the plurality of different antenna weight vectors, and the at least one known training signal.

摘要翻译： 一种用于通信系统中的波束成形的方法包括经由多个天线接收多个信号，其中多个信号对应于至少一个已知的训练信号，产生要应用于多个不同的天线权重向量中的相应一个 接收作为多个信号中的每一个的多个天线，其中多个天线权重向量中的每一个是酉矩阵的相应基本向量，并且至少基于所接收的多个信号生成接收机天线权重向量， 所述多个不同的天线权重向量和所述至少一个已知的训练信号。

公开(公告)号：US07864091B1

公开(公告)日：2011-01-04

申请号：US12157255

申请日：2008-06-09

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： H03M1/181 ,  H03M1/186

摘要： A system comprises a gain control module that selectively generates a gain locked signal based on a wireless input signal. A sync detect module that selectively generates a sync detect signal based on the wireless input signal. An interference detection module that selectively generates a wireless interference detection signal based on the gain locked signal and the sync detect signal.

摘要翻译： 一种系统包括：增益控制模块，其根据无线输入信号选择性地产生增益锁定信号。 同步检测模块，其基于无线输入信号选择性地产生同步检测信号。 干扰检测模块，其基于增益锁定信号和同步检测信号有选择地生成无线干扰检测信号。

公开(公告)号：US20100054223A1

公开(公告)日：2010-03-04

申请号：US12548205

申请日：2009-08-26

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

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

IPC分类号： H04W4/00

CPC分类号： H04W16/28 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2025/03426 ,  H04L2025/03789 ,  H04L2025/03815

摘要： In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, a beamforming training (BFT) data unit that conforms to a second format is transmitted, wherein a length of the BFT data unit is shorter than lengths supported by the first format, wherein the BFT data unit is for transmitting PHY beamforming training information. Information to indicate the BFT data unit conforms to the second format is transmitted to a receiving device. The BFT data unit is generated according to the second format, wherein the BFT data unit includes BFT information elements. The BFT data unit is then transmitted to the receiving device.

摘要翻译： 在其中通信设备利用符合第一格式的数据单元交换信息的无线通信系统中，发送符合第二格式的波束形成训练（BFT）数据单元，其中所述BFT数据单元的长度短于所支持的长度 通过第一格式，其中BFT数据单元用于发送PHY波束形成训练信息。 用于指示符合第二格式的BFT数据单元的信息被发送到接收设备。 BFT数据单元根据第二格式生成，其中BFT数据单元包括BFT信息元素。 然后将BFT数据单元发送到接收设备。

公开(公告)号：US20100008436A1

公开(公告)日：2010-01-14

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： H04L27/28

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：US08897394B1

公开(公告)日：2014-11-25

申请号：US12400442

申请日：2009-03-09

申请人： Rohit U. Nabar ,  Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

发明人： Rohit U. Nabar ,  Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

IPC分类号： H03K9/00

CPC分类号： H04W72/085 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0069 ,  H04L5/0085 ,  H04L25/0204 ,  H04L25/0228 ,  H04L27/0008 ,  H04L27/261 ,  H04W24/10 ,  H04W88/06

摘要： Methods and apparatus are provided for adaptively selecting a communications mode in high frequency systems. A first dual-mode device having capabilities of using two or more high frequency communications modes, such as OFDM and SC modulation, may transmit a signal to a second dual-mode device with the same capabilities. The second dual-mode device may compute a channel characteristic associated with a high frequency communications channel and select an optimal high frequency communications mode. The second dual-mode device may transmit information indicative of the channel characteristic or the selected communications mode to the first dual-mode device. The first dual-mode device may select and operate using the optimal high frequency communications mode based on the information received from the second dual-mode device. The first and second dual-mode devices may communicate using the selected high frequency communications mode.

摘要翻译： 提供了用于在高频系统中自适应地选择通信模式的方法和装置。 具有使用诸如OFDM和SC调制之类的两个或多个高频通信模式的能力的第一双模设备可以将信号发送到具有相同能力的第二双模设备。 第二双模设备可以计算与高频通信信道相关联的信道特性，并选择最佳高频通信模式。 第二双模设备可以向第一双模设备发送指示信道特性或所选通信模式的信息。 第一双模设备可以基于从第二双模设备接收的信息，使用最佳高频通信模式来选择和操作。 第一和第二双模式设备可以使用所选择的高频通信模式进行通信。

公开(公告)号：US08817912B1

公开(公告)日：2014-08-26

申请号：US13274401

申请日：2011-10-17

申请人： Songping Wu ,  Hui-Ling Lou

发明人： Songping Wu ,  Hui-Ling Lou

IPC分类号： H04L27/20

CPC分类号： H04L27/206 ,  H04L27/3411

摘要： Systems, methods, and other embodiments associated with phase-rotated tone-grouping modulation are described. According to one embodiment, an apparatus includes a parser configured to reposition bits of at least a portion of a data word. An encoder configured to, from the repositioned bits, form i) a tone grouping and ii) a copy of the tone grouping. The apparatus also includes a modulator configured to modulate the tone grouping and the copy of the tone grouping.

摘要翻译： 描述了与相位旋转色调组调制相关联的系统，方法和其他实施例。 根据一个实施例，一种装置包括被配置为重新定位数据字的至少一部分的位的解析器。 配置成从重新定位的位形成i）音调分组的编码器，和ii）音调分组的副本。 该装置还包括调制器，用于调制音调分组和音调分组的副本。