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31. 发明授权

US08175197B2 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：US08175197B2
公开(公告)日：2012-05-08
申请号：US11717405
申请日：2007-03-13
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H03D1/00
CPC分类号： H04L27/2656 , H04L5/023 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A system includes a correlation module and a control module. The correlation module is configured to generate correlation values based on a correlation of modulated signals with a plurality of preamble sequences and generate correlation values. The modulated signals include sub-carriers modulated using orthogonal frequency domain multiplexing (OFDM). The control module is configured to select a largest correlation value from the correlation values and detect one of the preamble sequences in the modulated signals upon determining that a magnitude of the largest correlation value is greater than or equal to a first predetermined threshold. The control module divides N of the sub-carriers into L bands in response to a channel gain of the sub-carriers not being substantially the same for all of the sub-carriers, where N and L are integers greater than 1, and where each of the L bands includes N/L of the sub-carriers.
摘要翻译：系统包括相关模块和控制模块。相关模块被配置为基于调制信号与多个前同步码序列的相关性生成相关值，并且生成相关值。调制信号包括使用正交频域复用（OFDM）调制的子载波。控制模块被配置为从相关值中选择最大相关值，并且在确定最大相关值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序列之一。响应于子载波的信道增益对于所有子载波基本不相同，其中N和L是大于1的整数，控制模块将N个子载波分成L个波段，并且其中每个的L个波段包括N / L个子载波。

32. 发明授权

US08135098B2 BICM decoding in the presence of co-channel interference 有权
标题翻译：在存在同频道干扰的情况下进行BICM解码
公开(公告)号：US08135098B2
公开(公告)日：2012-03-13
申请号：US12119264
申请日：2008-05-12
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： H04B1/10
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）。

33. 发明授权

US08099050B1 Digital radio data system receiver methods and apparatus 有权
标题翻译：数字无线电数据系统接收机的方法和装置
公开(公告)号：US08099050B1
公开(公告)日：2012-01-17
申请号：US12544567
申请日：2009-08-20
申请人： Jungwon Lee , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou , Chris Cheng-Chieh Lee
发明人： Jungwon Lee , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou , Chris Cheng-Chieh Lee
IPC分类号： H04B1/16
CPC分类号： H04L27/2334 , H04B1/1653 , H04H20/34 , H04H40/18 , H04H2201/13
摘要： Methods and apparatus are provided for receiving a first signal and generating an output signal indicative of radio data system (“RDS”) information. A receiver circuit of the invention can include mixer circuitry, lowpass filter circuitry, downsampler circuitry, and decoder circuitry. Advantageously, the receiver circuit can operate entirely within the digital domain, promoting interoperability with digital frequency modulation (“FM”) demodulator circuitry.
摘要翻译：提供了用于接收第一信号并产生指示无线电数据系统（“RDS”）信息的输出信号的方法和装置。本发明的接收机电路可以包括混频器电路，低通滤波器电路，下采样器电路和解码器电路。有利地，接收器电路可以完全在数字域内操作，促进与数字频率调制（“FM”）解调器电路的互操作性。

34. 发明授权

US08077785B1 Generalized co-phasing for multiple transmitting and receiving antennas 有权
标题翻译：用于多个发射和接收天线的广义同相
公开(公告)号：US08077785B1
公开(公告)日：2011-12-13
申请号：US12098924
申请日：2008-04-07
申请人： Jungwon Lee , Rohit U. Nabar , Jihwan P. Choi , Hui-Ling Lou
发明人： Jungwon Lee , Rohit U. Nabar , Jihwan P. Choi , Hui-Ling Lou
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04B7/0682 , H04B7/0413 , H04B7/0465
摘要： A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.
摘要翻译：一种用于确定多输入多输出（MIMO）通信系统中的多个发射天线中的每一个的相位的方法，包括：针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线，基于第一和第二组所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益，所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

35. 发明授权

US07970066B1 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：US07970066B1
公开(公告)日：2011-06-28
申请号：US11963294
申请日：2007-12-21
申请人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
发明人： Jungwon Lee , Qing Zhao , Hui-Ling Lou
IPC分类号： H04L27/28
CPC分类号： H04L27/08 , H03G3/3052 , H03G3/3078 , H04L27/2626
摘要： A system includes an input, a variable gain amplifier (VGA), and an automatic gain control (AGC) module. The input receives an input signal. The input signal includes frames of N symbols modulated using orthogonal frequency division multiplexing (OFDM), wherein a cyclic prefix (CP) precedes each of the N symbols, and wherein N is an integer greater than 1. The VGA provides a gain when amplifying the input signal. The AGC module selectively adjusts the gain of the VGA during the CP preceding M of the N symbols, wherein M is an integer greater than 1.
摘要翻译：一种系统包括输入，可变增益放大器（VGA）和自动增益控制（AGC）模块。输入接收输入信号。输入信号包括使用正交频分复用（OFDM）调制的N个符号的帧，其中循环前缀（CP）在N个符号之前，并且其中N是大于1的整数。当VGA放大输入信号。 AGC模块在N个符号之前的M之前的CP期间选择性地调整VGA的增益，其中M是大于1的整数。

36. 发明授权

US07756003B1 Adaptive OFDM transmitter based on carrier frequency offset 有权
标题翻译：基于载波频偏的自适应OFDM发射机
公开(公告)号：US07756003B1
公开(公告)日：2010-07-13
申请号：US10986130
申请日：2004-11-10
申请人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
发明人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
IPC分类号： H04J11/00 , G01R31/08 , H04J3/16 , H04L27/28 , H04B17/00
CPC分类号： H04L27/2657 , H04B7/01
摘要： A system comprises a transmitter module that receives transmitter data, that includes at least one transmitter operating parameter and that generates an orthogonal frequency division multiplexing (OFDM) signal based on the transmitter data and the at least one transmitter operating parameter. An operating parameters generating module receives a carrier frequency offset (CFO), communicates with the transmitter module and adjusts the at least one transmitter operating parameter based on the CFO. The transmitter module adjusts a parameter of at least one of a channel coding module, a modulating module, and/or a power control module based on the CFO.
摘要翻译：一种系统包括发射机模块，其接收包括至少一个发射机操作参数并且基于发射机数据和至少一个发射机操作参数产生正交频分复用（OFDM）信号的发射机数据。操作参数产生模块接收载波频率偏移（CFO），与发射机模块通信，并且基于CFO调整至少一个发射机操作参数。发射机模块基于CFO调整信道编码模块，调制模块和/或功率控制模块中的至少一个的参数。

37. 发明授权

US07684774B1 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal 失效
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：US07684774B1
公开(公告)日：2010-03-23
申请号：US11582735
申请日：2006-10-17
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： H04B1/06
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。

38. 发明授权

US07636297B1 Transmit diversity technique based on channel randomization for OFDM systems 有权
标题翻译：基于OFDM系统的信道随机化的发射分集技术
公开(公告)号：US07636297B1
公开(公告)日：2009-12-22
申请号：US11204069
申请日：2005-08-15
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04J11/00
CPC分类号： H04J11/0063 , H04B7/0413 , H04B7/0456 , H04B7/0615 , H04B7/0885 , H04L1/0606 , H04L27/2626 , H04L27/2647
摘要： A physical layer (PHY) module includes NT radio frequency (RF) channels and a mapping module. The NT RF channels each include N subcarriers. The mapping module includes Ns inputs receiving corresponding ones of NS data streams. The mapping module further includes NT outputs communicating with corresponding ones of the NT RF channels. Each of the NT outputs includes N outputs. The mapping module further includes a mapping matrix that maps the NS data streams to the NT outputs. NT, NS, and N are integers greater than or equal to 2. The NT RF channels include NT gain modules that apply NT different complex gains to the NT outputs, respectively. One of the NT different complex gains is applied to each of the N outputs of a corresponding one of the NT outputs. The NT different complex gains correspond to NT transmit antennas of the NT RF channels, respectively.
摘要翻译：物理层（PHY）模块包括NT射频（RF）信道和映射模块。 NT个RF信道各自包括N个子载波。映射模块包括接收对应的NS数据流的Ns个输入。映射模块还包括与相应的NT RF信道通信的NT个输出。每个NT输出包括N个输出。映射模块还包括将NS数据流映射到NT个输出的映射矩阵。 NT，NS和N是大于或等于2的整数.NT RF信道包括分别向NT个输出应用NT个不同复合增益的NT增益模块。 NT个不同的复数增益之一被应用于NT个输出中对应的一个的N个输出中的每一个。 NT个不同的复数增益分别对应于NT个RF信道的NT个发射天线。

39. 发明申请

US20090282311A1 SYMBOL VECTOR-LEVEL COMBINING RECEIVER FOR INCREMENTAL REDUNDANCY HARQ WITH MIMO 有权
标题翻译：带有MIMO的增量冗余HARQ的符号矢量级组合接收机
公开(公告)号：US20090282311A1
公开(公告)日：2009-11-12
申请号：US12463025
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： H04L1/18 , H04L27/06
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。

40. 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。

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