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71. 发明授权

US08260238B1 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal 有权
标题翻译：用于从立体声复用信号中恢复副载波信号的系统和方法
公开(公告)号：US08260238B1
公开(公告)日：2012-09-04
申请号：US12696558
申请日：2010-01-29
申请人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
发明人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
IPC分类号： H04B7/00
CPC分类号： H04B1/1653 , H04H40/45
摘要： Disclosed herein are systems and methods for recovering a sub-carrier signal from a multiplexed signal having an embedded pilot tone signal. The recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for generating a frequency-doubled signal from the recovered pilot signal, and for phase-shifting the frequency-doubled signal by a pre-determined phase difference from the embedded pilot tone signal. Another recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for phase-shifting the pilot signal by a pre-determined phase difference from the embedded pilot tone signal, and for generating a frequency-doubled signal from the phase-shifted signal.
摘要翻译：这里公开了用于从具有嵌入导频音信号的复用信号中恢复副载波信号的系统和方法。恢复系统包括用于从所接收的多路复用信号中恢复导频信号的电路，用于从恢复的导频信号产生加倍频的信号，并且将加倍频信号与嵌入式导频相移预定的相位差音调信号。另一个恢复系统包括用于从接收到的多路复用信号中恢复导频信号的电路，用于将导频信号与嵌入的导频音信号相位相移预定的相位差，并用于从相移信号。

72. 发明授权

US08254503B1 Tracking automatic gain control of orthogonal frequency domain multiplexing systems 有权
标题翻译：跟踪正交频域复用系统的自动增益控制
公开(公告)号：US08254503B1
公开(公告)日：2012-08-28
申请号：US13169691
申请日：2011-06-27
申请人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
发明人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
IPC分类号： H04B14/06 , H04L27/28
CPC分类号： H04L27/08 , H03G3/3052 , H03G3/3078 , H04L27/2626
摘要： An automatic gain control tracking system including a variable gain amplifier and an automatic gain control module. The variable gain amplifier is configured to amplify an input signal in accordance with a first gain, in which i) the input signal comprises a plurality of orthogonal frequency domain multiplexing (OFDM) symbols, and ii) each of the plurality of orthogonal frequency domain multiplexing (OFDM) symbols in the input signal is preceded by a respective cyclic prefix. The automatic gain control module configured to vary the first gain of the variable gain amplifier during the respective cyclic prefix preceding each of the plurality of orthogonal frequency domain multiplexing (OFDM) symbols in the input signal.
摘要翻译：一种包括可变增益放大器和自动增益控制模块的自动增益控制跟踪系统。可变增益放大器被配置为根据第一增益放大输入信号，其中i）输入信号包括多个正交频域复用（OFDM）符号，以及ii）多个正交频域复用中的每一个（OFDM）符号之前是相应的循环前缀。所述自动增益控制模块被配置为在所述输入信号中的所述多个正交频域复用（OFDM）符号中的每一个之前的相应循环前缀期间改变所述可变增益放大器的第一增益。

73. 发明申请

US20120213316A1 PREAMBLE DETECTION WITH UNKNOWN CHANNEL 有权
标题翻译：未知通道的前瞻性检测
公开(公告)号：US20120213316A1
公开(公告)日：2012-08-23
申请号：US13460109
申请日：2012-04-30
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04L27/28
CPC分类号： H04L27/2656 , H04L5/023 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A system comprises a correlation module that correlates modulated signals with a plurality of preamble sequences and that generates correlation values. A control module selects a largest correlation value from said correlation values and detects one of said preamble sequences in said modulated signals upon determining that a magnitude of said largest correlation value is greater than or equal to a first predetermined threshold.
摘要翻译：一种系统包括相关模块，其将调制信号与多个前同步码序列相关联，并产生相关值。控制模块从所述相关值中选择最大的相关值，并且在确定所述最大相关值的大小大于或等于第一预定阈值时，检测所述调制信号中的所述前同步码序列之一。

74. 发明申请

US20120148000A1 BICM DECODING IN THE PRESENCE OF CO-CHANNEL INTERFERENCE 有权
标题翻译： BICM解码存在共通道干扰
公开(公告)号：US20120148000A1
公开(公告)日：2012-06-14
申请号：US13402381
申请日：2012-02-22
申请人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
发明人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
IPC分类号： H04L27/06 , H04L25/08
CPC分类号： H04B1/1027 , H04L25/067
摘要： Systems and methods are provided for computing soft information for digital information based on a received signal, where the received signal suffers from noise and interference. A receiver that decodes the received signal may estimate channel information, such as the channel gain, associated with the interfering source. The receiver may also obtain modulation information through a backbone network or by decoding control information transmitted by the interfering source. Using the modulation information and the channel information, the receiver may estimate the effect that interference has on the received signal, and may compute soft information (e.g., a log-likelihood ratio) for the digital information.
摘要翻译：提供了系统和方法，用于基于接收到的信号来计算用于数字信息的软信息，其中所接收的信号受到噪声和干扰的影响。对接收到的信号进行解码的接收机可以估计与干扰源相关联的信道信息，例如信道增益。接收机还可以通过骨干网获得调制信息，或通过解码由干扰源发送的控制信息。使用调制信息和信道信息，接收机可以估计干扰对接收信号的影响，并且可以计算数字信息的软信息（例如，对数似然比）。

75. 发明授权

US08130858B1 Method and apparatus for implementing transmit diversity in OFDM systems 有权
标题翻译：在OFDM系统中实现发射分集的方法和装置
公开(公告)号：US08130858B1
公开(公告)日：2012-03-06
申请号：US12129473
申请日：2008-05-29
申请人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit U. Nabar , Yakun Sun
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit U. Nabar , Yakun Sun
IPC分类号： H04B7/02
CPC分类号： H04L27/2627 , H04B7/0413 , H04B7/0669 , H04B7/0671 , H04L1/0625 , H04L5/0023 , H04L5/0087 , H04L25/0204 , H04L25/03159 , H04L2025/03414 , H04L2025/03426
摘要： A plurality of phases are determined. The plurality of phases are to be applied to a plurality of transmit signals to be transmitted via a plurality of transmit antennas. Each transmit signal comprises a plurality of sub-carriers. Each phase of the plurality of phases is to be applied to a corresponding block of sub carriers in the plurality of transmit signals, and each block of sub-carriers comprises a plurality of sub-carriers that are adjacent in frequency. The plurality of phases are applied to the plurality of transmit signals to implement transmit diversity. Each phase is applied to the corresponding block of sub carriers in the plurality of transmit signals.
摘要翻译：确定多个阶段。多个相位应用于要经由多个发射天线发射的多个发射信号。每个发射信号包括多个子载波。将多个相位的每个相位施加到多个发射信号中的相应的子载波块，并且每个子载波块包括在频率上相邻的多个子载波。多个相位被施加到多个发射信号以实现发射分集。每个相位被施加到多个发射信号中的相应的子载波块。

76. 发明授权

US08031784B2 Preamble detection with unknown channel 有权
标题翻译：前导码检测与未知信道
公开(公告)号：US08031784B2
公开(公告)日：2011-10-04
申请号：US11648735
申请日：2006-12-29
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04K1/00
CPC分类号： H04L27/2656 , H04L5/023 , H04L27/2662 , H04L27/2676
摘要： A system includes a differential demodulation module that differentially demodulates modulated signals to generate differentially demodulated signals. A correlation module correlates the differentially demodulated signals with derived preamble sequences and generates correlation values. The derived preamble sequences are derived from preamble sequences. One of the derived preamble sequences is generated by combining bits of one of the preamble sequences using an exclusive OR function. 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. The 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：一种系统包括对差分解调模块进行差分解调以产生差分解调信号的差分解调模块。相关模块将差分解调信号与导出的前同步码序列进行相关，并产生相关值。导出的前导码序列是从前导序列中导出的。通过使用异或功能组合前导序列之一的比特来生成派生的前导码序列之一。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。

77. 发明授权

US07872962B1 System and method for producing weighted signals in a diversity communication system 有权
标题翻译：用于在分集通信系统中产生加权信号的系统和方法
公开(公告)号：US07872962B1
公开(公告)日：2011-01-18
申请号：US11447762
申请日：2006-06-05
申请人： Rohit Nabar , Kedar Shirali , Hui-Ling Lou , Jungwon Lee
发明人： Rohit Nabar , Kedar Shirali , Hui-Ling Lou , Jungwon Lee
IPC分类号： H04J11/00
CPC分类号： H04B7/084 , H04B7/0615 , H04B7/0845 , H04B2201/70706 , H04L25/0232 , H04L27/0014
摘要： The disclosed technology relates to a communication system and method in which multiple versions of a signal are processed to detect the signal. The communication system can include transmitters that communicate different versions of a signal to a receiver. The different versions are weighted versions of the signal and are communicated on different channels. The weight for a weighted signal is based on an inverse of an estimate of the phase shift of the particular channel to which the weighted signal will be communicated. The weights are also based on a unity gain such that each weighted signal has the same magnitude as the original signal. A receiver that receives the weighted signals processes the received signals to detect the original signal.
摘要翻译：所公开的技术涉及其中处理多个版本的信号以检测信号的通信系统和方法。通信系统可以包括将信号的不同版本传送到接收机的发射机。不同的版本是信号的加权版本，并且在不同的信道上进行通信。加权信号的权重基于加权信号将被传送到的特定信道的相移的估计的倒数。权重也基于单位增益，使得每个加权信号具有与原始信号相同的幅度。接收加权信号的接收机处理接收的信号以检测原始信号。

78. 发明申请

US20090279633A1 SYMBOL VECTOR-LEVEL COMBINING TRANSMITTER FOR INCREMENTAL REDUNDANCY HARQ WITH MIMO 有权
标题翻译：用于具有MIMO的增量冗余HARQ的符号矢量级组合发射机
公开(公告)号：US20090279633A1
公开(公告)日：2009-11-12
申请号：US12463017
申请日：2009-05-08
申请人： Jungwon Lee , Yakun Sun , Hui-Ling Lou
发明人： Jungwon Lee , Yakun Sun , Hui-Ling Lou
IPC分类号： H04B7/02
CPC分类号： H04B7/024 , H04B7/0413 , H04L1/0042 , H04L1/0068 , H04L1/0643 , H04L1/1819
摘要： Techniques are provided for transmitting and receiving a mother code in an incremental redundancy hybrid automatic repeat-request protocol. A set of information bits corresponding to a message may be encoded and interleaved to produce the mother code. Each bit position of the mother code may be mapped to an output symbol, and each output symbol may be mapped to an antenna for transmission. One or more transmissions of symbols contained in the output symbols may be performed, where each transmission may include puncturing the mother code by selecting one or more symbols from the of output symbols, and transmitting each symbol in the one or more symbols on an antenna corresponding to that symbol. The mother code may be decoded, in part, by determining combinable bits contained within a set of received symbols, and computing one or more log-likelihood ratio values corresponding to each symbol in the set of received symbols.
摘要翻译：提供了用于以增量冗余混合自动重复请求协议发送和接收母码的技术。对应于消息的一组信息位可以被编码和交织以产生母码。母码的每个比特位置可以被映射到输出符号，并且每个输出符号可以被映射到天线以进行传输。可以执行输出符号中包含的符号的一个或多个传输，其中每个传输可以包括通过从输出符号中选择一个或多个符号来对母码进行穿刺，并且在天线上的一个或多个符号中发送每个符号到那个符号。可以部分地通过确定包含在一组接收到的符号内的可组合比特，以及计算与所接收的符号集合中的每个符号相对应的一个或多个对数似然比值来对母码进行解码。

79. 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。

80. 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。

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