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1. 发明授权

US08014456B1 Preamble detection with multiple receive antennas 有权
标题翻译：使用多个接收天线进行前导码检测
公开(公告)号：US08014456B1
公开(公告)日：2011-09-06
申请号：US11820397
申请日：2007-06-19
申请人： Jongwon Lee , Hui-Ling Lou
发明人： Jongwon Lee , Hui-Ling Lou
IPC分类号： H04K1/10
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2675
摘要： A system includes a differential demodulation module that differentially demodulates modulated signals received from R antennas. A first summing module sums the differentially demodulated signals to generate a combined signal. A state detection module detects states of X symbols in the combined signal. A second summing module (i) receives Y preamble sequences each comprising X predetermined symbols and (ii) generates X sums for each of the Y preamble sequences by adding each of the states of the X symbols with corresponding states of the X predetermined symbols of each of Y preamble sequences. The states of the X predetermined symbols are generated by inverting states of derived symbols in derived preamble sequences, which are derived from the Y preamble sequences. Each of the Y preamble sequences is different from others of the Y preamble sequences. R, X, and Y are integers greater than 1.
摘要翻译：一种系统包括差分解调从R个天线接收的调制信号的差分解调模块。第一求和模块将差分解调信号相加以产生组合信号。状态检测模块检测组合信号中的X个符号的状态。第二求和模块（i）接收每个包括X个预定符号的Y个前同步码序列，并且（ii）通过将X个符号的每个状态与每个X个符号的X个预定符号的相应状态相加，生成每个Y个前同步码序列的X个和的前导码序列。 X个预定符号的状态是通过从导出的前同步码序列中导出的导出符号的状态反转而产生的，这些前导码序列是从Y个前同步码序列导出的。 Y前同步码序列中的每一个与Y前同步码序列中的其他序列不同。 R，X和Y是大于1的整数。

2. 发明授权

US07991077B1 Preamble detection with multiple receive antennas 有权
标题翻译：使用多个接收天线进行前导码检测
公开(公告)号：US07991077B1
公开(公告)日：2011-08-02
申请号：US11753953
申请日：2007-05-25
申请人： Jongwon Lee , Hui-Ling Lou
发明人： Jongwon Lee , Hui-Ling Lou
IPC分类号： H03K9/00
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2675
摘要： A system including a differential demodulation module that receives modulated signals from R antennas and that differentially demodulates the modulated signals to generate differentially demodulated signals, where R is an integer greater than or equal to 1. A summing module sums the differentially demodulated signals to generate a combined signal. A correlation module correlates the combined signal with derived preamble sequences and generates correlation values based on the correlation. The derived preamble sequences are derived from preamble sequences. Each bit of one of the derived preamble sequences has a first state when a corresponding bit and a bit adjacent to the corresponding bit in a corresponding one of the preamble sequences have opposite states. Each bit has a second state when the corresponding bit and the bit adjacent to the corresponding bit have the same state.
摘要翻译：一种包括差分解调模块的系统，该差分解调模块从R天线接收调制信号，并对调制信号进行差分解调以产生差分解调信号，其中R是大于或等于1的整数。求和模块对差分解调信号求和，以产生组合信号。相关模块将组合信号与导出的前同步码序列进行相关，并根据相关性产生相关值。导出的前导码序列是从前导序列中导出的。当相应的一个前同步码序列中的相应位相邻的相应位和位相反时，所导出的前同步码序列之一的每个位具有第一状态。当对应的位和与相应位相邻的位具有相同的状态时，每个位具有第二状态。

3. 发明授权

US07876858B1 Preamble detection with multiple receive antennas 有权
标题翻译：使用多个接收天线进行前导码检测
公开(公告)号：US07876858B1
公开(公告)日：2011-01-25
申请号：US11820313
申请日：2007-06-19
申请人： Jongwon Lee , Hui-Ling Lou
发明人： Jongwon Lee , Hui-Ling Lou
IPC分类号： H03K9/00
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2675
摘要： A system comprises a correlation module that receives modulated signals from R antennas, that correlates each of the modulated signals with Y preamble sequences, and that generates Y correlation values for each of the R antennas, where R and Y are integers greater than or equal to 1. A control module generates correlation sums by adding each of the Y correlation values for one of the R antennas to corresponding ones of the Y correlation values for others of the R antennas, that selects a largest correlation sum from the correlation sums, and that detects one of the preamble sequences in the modulated signals when a magnitude of the largest correlation sum is greater than or equal to a first predetermined threshold.
摘要翻译：一种系统包括一个相关模块，该相关模块从R个天线接收调制信号，将每个调制信号与Y个前同步码序列进行相关，并产生每个R天线的Y相关值，其中R和Y是大于或等于控制模块通过将R个天线中的一个的Y个相关值中的每一个相加到R个天线中的另一个的相关值中的相关值，从相关和中选出最大的相关和来产生相关和，并且当最大相关和的大小大于或等于第一预定阈值时，检测调制信号中的前导码序列之一。

4. 发明授权

US09924512B1 OFDMA with block tone assignment for WLAN 有权
公开(公告)号：US09924512B1
公开(公告)日：2018-03-20
申请号：US12730651
申请日：2010-03-24
申请人： Hongyuan Zhang , Rohit U. Nabar , Hui-Ling Lou
发明人： Hongyuan Zhang , Rohit U. Nabar , Hui-Ling Lou
IPC分类号： H04W4/00 , H04W72/04 , H04L5/00 , H04W84/12
CPC分类号： H04W72/0453 , H04L5/0007 , H04L5/003 , H04W84/12
摘要： A plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks are assigned to a plurality of devices including a first device and a second device. The plurality of OFDM sub-channel blocks includes a first OFDM sub-channel block assigned to the first device and a second OFDM sub-channel block assigned to the second device. Data for the first device and data for the second device are received. OFDM data units are generated, wherein data for the first device is modulated on sub-channels in the first OFDM sub-channel block and data for the second device is modulated on sub-channels in the second OFDM sub-channel block. At least one of the OFDM sub-channel blocks is formatted to substantially conform to a physical layer specification of a WLAN communication protocol having a maximum channel bandwidth smaller than a bandwidth of the generated OFDM data units.

5. 发明授权

US09124944B1 Synchronization of control signal transmissions for a multicast service 有权
标题翻译：多播服务的控制信号传输同步
公开(公告)号：US09124944B1
公开(公告)日：2015-09-01
申请号：US13292720
申请日：2011-11-09
申请人： Jihwan P. Choi , Hui-Ling Lou
发明人： Jihwan P. Choi , Hui-Ling Lou
IPC分类号： H04L12/28 , H04N21/6405 , H04J1/16 , H04L12/18
CPC分类号： H04N21/6405 , H04L12/1845 , H04L12/1877 , H04L12/1881
摘要： In a method for transmitting control signals in a multicast communication system, wherein the multicast communication system broadcasts one or more multicast channels, one or more occurrences of a first control signal are transmitted. The first control signal includes at least control information corresponding to the one or more multicast channels. Additionally, one or more occurrences of a second control signal are transmitted for each of the one or more multicast channels. The second control signal includes at least control information corresponding to the respective multicast channel. At least one transmission of an occurrence of the second control signal is synchronized with at least one transmission of an occurrence of the first control signal.
摘要翻译：在多播通信系统中发送控制信号的方法中，其中多播通信系统广播一个或多个多播信道，发送一个或多个出现的第一控制信号。第一控制信号至少包括与一个或多个多播信道相对应的控制信息。另外，针对一个或多个多播信道中的每一个发送一个或多个出现的第二控制信号。第二控制信号至少包括对应于各个多播信道的控制信息。第二控制信号的发生的至少一次发送与第一控制信号的发生的至少一次发送同步。

6. 发明授权

US08996066B1 Methods and apparatus for directing a beam towards a device in the presence of interference 有权
标题翻译：用于在存在干扰的情况下将光束引向设备的方法和装置
公开(公告)号：US08996066B1
公开(公告)日：2015-03-31
申请号：US12363047
申请日：2009-01-30
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04W16/28
CPC分类号： H04B7/0617 , H04B7/0626 , H04L25/0204 , H04L25/021 , H04L25/0244 , H04W16/28 , H04W72/046 , H04W72/082
摘要： Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received by a received device. The beam shape is affected by signals transmitted by interfering sources. The receiving device computes channel estimates associated with the transmission source and the interfering sources. A feedback signal that represents the channel estimates associated with the transmission and interfering sources is transmitted to the transmission source. The transmission source changes characteristics of the beam to compensate for the interference caused by the interfering sources. The transmission source may change the characteristics of the beam by performing precoding algorithms.
摘要翻译：提供了用于在存在干扰的情况下将光束引向接收装置的方法和装置。由发送源发送的波束由接收的设备接收。光束形状受干扰源发射的信号的影响。接收设备计算与传输源和干扰源相关联的信道估计。表示与传输和干扰源相关联的信道估计的反馈信号被传送到传输源。传输源改变光束的特性以补偿由干扰源造成的干扰。传输源可以通过执行预编码算法来改变波束的特性。

7. 发明授权

US08964789B1 Method and system for data synchronization in communication systems using repetitive preamble patterns 有权
标题翻译：使用重复前导码模式的通信系统中数据同步的方法和系统
公开(公告)号：US08964789B1
公开(公告)日：2015-02-24
申请号：US12609862
申请日：2009-10-30
申请人： Jungwon Lee , Jiwoong Choi , Qing Zhao , Hui-Ling Lou
发明人： Jungwon Lee , Jiwoong Choi , Qing Zhao , Hui-Ling Lou
IPC分类号： H04J3/06
CPC分类号： H04L27/2643 , H04L7/042 , H04L27/2613 , H04L27/2656 , H04L2027/0026
摘要： Methods and apparatus for data synchronization in communication systems using repetitive preamble patterns. In one embodiment, a method includes receiving a signal, where the received signal includes a data unit. The data unit includes a preamble symbol, and the preamble symbol has a start time and includes Q portions, each having the same pattern. The method further includes determining multiple possible values of a frame timing (FT). The method further includes determining multiple correlation functions including at least one correlation function corresponding to each of the multiple possible values of the FT, such that a given correlation function corresponding to a given possible value of the FT represents a correlation between data in two non-adjacent portions of the Q portions associated with the given FT. The method further includes selecting one of the multiple possible values of the FT based at least in part on the multiple determined correlation functions.
摘要翻译：使用重复前导码模式的通信系统中的数据同步的方法和装置。在一个实施例中，一种方法包括接收信号，其中所接收的信号包括数据单元。数据单元包括前导符号，并且前导码符号具有开始时间，并且包括各自具有相同模式的Q个部分。该方法还包括确定帧定时（FT）的多个可能值。该方法还包括确定包括与FT的多个可能值中的每一个相对应的至少一个相关函数的多个相关函数，使得对应于FT的给定可能值的给定相关函数表示两个非可变值中的数据之间的相关性，与给定FT相关联的Q部分的相邻部分。该方法还包括至少部分地基于多个确定的相关函数来选择FT的多个可能值中的一个。

8. 发明授权

US08897394B1 Methods and apparatus for adaptively selecting a communications mode in high frequency systems 有权
标题翻译：用于在高频系统中自适应选择通信模式的方法和装置
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。

9. 发明授权

US08879999B2 Using frequency bands characterized by type of unwanted interference for coexistence among multiple wireless communication technologies 有权
标题翻译：使用多种无线通信技术共存的特征为不想要的干扰类型的频带
公开(公告)号：US08879999B2
公开(公告)日：2014-11-04
申请号：US13611174
申请日：2012-09-12
申请人： Ying Cai , Jihwan P. Choi , Hui-Ling Lou , Vladan Petrovic , Chuxiang Li
发明人： Ying Cai , Jihwan P. Choi , Hui-Ling Lou , Vladan Petrovic , Chuxiang Li
IPC分类号： H04B1/00 , H04W72/08 , H04B1/40 , H04W88/06 , H04B1/10
CPC分类号： H04B1/406 , H04B1/109 , H04W72/082 , H04W88/06
摘要： Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, and a transmitter configured to transmit, according to a first protocol, first wireless signals in the one of the plurality of the frequency regions selected by the controller, wherein each frequency region is characterized by a respective type of unwanted interference generated responsive to the transmitter transmitting the first wireless signals in the respective frequency region; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter.
摘要翻译：具有相应方法和计算机可读介质的装置包括：第一收发器，包括被配置为选择多个频率区域中的一个的控制器，以及被配置为根据第一协议传输多个频率区域中的一个的第一无线信号的发射机其中每个频率区域的特征在于响应于在相应频率区域中发送第一无线信号的发射机而产生的相应类型的不需要的干扰; 配置为基于由控制器选择的多个频率区域中的一个选择一个或多个频率信道的仲裁器; 以及第二收发机，其被配置为仅在所述仲裁器选择的所述一个或多个频率信道中收发根据第二协议的第二无线信号。

10. 发明授权

US08817912B1 Phase-rotated tone-grouping modulation 有权
标题翻译：相位旋转音调分组调制
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。

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