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1. 发明授权

US07555065B1 Adaptive signal tuning for digital radio receivers operating in FM bands 有权
标题翻译：适用于在FM频段工作的数字无线电接收机的自适应信号调谐
公开(公告)号：US07555065B1
公开(公告)日：2009-06-30
申请号：US12150621
申请日：2008-04-30
申请人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
发明人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
IPC分类号： H04L27/00
CPC分类号： H04L5/143 , H04H20/26 , H04H20/30 , H04H40/18 , H04H60/04 , H04L5/06 , H04L5/14 , H04L27/10 , H04L27/2647
摘要： A radio receiver for receiving analog signals in a Frequency Modulation (FM) band includes a hybrid/all digital decoder that decodes a digital audio signal. An analog FM demodulator generates a demodulated analog audio signal. The analog FM demodulator demodulates the analog audio signal while the hybrid/all digital decoder simultaneously attempts to acquire synchronization. The digital radio receiver outputs the demodulated analog audio signal until synchronization is acquired.
摘要翻译：用于在频率调制（FM）频带中接收模拟信号的无线电接收机包括解码数字音频信号的混合/全数字解码器。模拟FM解调器产生解调的模拟音频信号。模拟FM解调器解调模拟音频信号，而混合/全数字解码器同时尝试获取同步。数字无线电接收机输出解调的模拟音频信号，直到获得同步。

2. 发明授权

US07515657B1 Frequency tracking for OFDM transmission over frequency selective channels 有权
标题翻译：通过频率选择信道进行OFDM传输的频率跟踪
公开(公告)号：US07515657B1
公开(公告)日：2009-04-07
申请号：US10985860
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： H04L27/00 , H04L27/06
CPC分类号： H04L27/2657 , H04L27/2679
摘要： A system comprises a receiver module that generates a receiver carrier frequency and that demodulates an orthogonal frequency division multiplexing (OFDM) signal using the receiver carrier frequency. A CFO estimator module communicates with the receiver module and generates a carrier frequency offset (CFO) estimate using an M-th power method and normalizing a magnitude thereof. Another CFO estimator module communicates with the receiver module and generates a carrier frequency offset (CFO) of the OFDM signal using an M-th power method and normalizing a magnitude thereof. The CFO estimator module may be blind. The OFDM signal may also contain pilot subcarriers. The pilot subcarriers may contain known pilot symbols.
摘要翻译：一种系统包括：接收机模块，其生成接收机载波频率，并使用接收机载波频率解调正交频分复用（OFDM）信号。 CFO估计器模块与接收器模块进行通信，并使用M次方法生成载波频率偏移（CFO）估计值并对其幅度进行归一化。另一个CFO估计器模块与接收机模块进行通信，并使用M次方法生成OFDM信号的载波频率偏移（CFO），并对其幅度进行归一化。 CFO估计模块可能是盲目的。 OFDM信号还可以包含导频子载波。导频子载波可以包含已知的导频符号。

3. 发明授权

US07433425B1 Adaptive signal tuning for digital radio receivers operating, in FM bands 有权
标题翻译：适用于在FM频段工作的数字无线电接收机的自适应信号调谐
公开(公告)号：US07433425B1
公开(公告)日：2008-10-07
申请号：US10792194
申请日：2004-03-03
申请人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
发明人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
IPC分类号： H04L27/00
CPC分类号： H04L5/143 , H04H20/26 , H04H20/30 , H04H40/18 , H04H60/04 , H04L5/06 , H04L5/14 , H04L27/10 , H04L27/2647
摘要： A radio receiver for receiving analog signals in a Frequency Modulation (FM) band includes a hybrid/all digital decoder that decodes a digital audio signal. An analog FM demodulator generates a demodulated analog audio signal. The analog FM demodulator demodulates the analog audio signal while the hybrid/all digital decoder simultaneously attempts to acquire synchronization. The digital radio receiver outputs the demodulated analog audio signal until synchronization is acquired.
摘要翻译：用于在频率调制（FM）频带中接收模拟信号的无线电接收机包括解码数字音频信号的混合/全数字解码器。模拟FM解调器产生解调的模拟音频信号。模拟FM解调器解调模拟音频信号，而混合/全数字解码器同时尝试获取同步。数字无线电接收机输出解调的模拟音频信号，直到获得同步。

4. 发明授权

US08774289B1 Soft decoding of coded bit-streams 有权
标题翻译：编码比特流的软解码
公开(公告)号：US08774289B1
公开(公告)日：2014-07-08
申请号：US13355349
申请日：2012-01-20
申请人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
发明人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
IPC分类号： H04L25/00
CPC分类号： H03M7/46 , H04L1/0054 , H04L1/006 , H04L1/0067 , H04L1/0071 , H04L27/34
摘要： A transmitter can include an encoder configured to encode a data sequence based on a first encoding rate to generate a first encoded bit stream having first bits with at least one first repeated bit and encode the data sequence based on a second, different encoding rate to generate a second encoded bit stream having second bits with at least one second repeated bit, where the first and second encoded bit streams each fully represent the data sequence. A receiver can include circuitry configured to produce identified repeated bits by identifying a repeated bit in the first encoded bit stream and a repeated bit in the second encoded bit stream that correspond to a same bit position, combine the first encoded bit stream and the second encoded bit stream including the identified repeated bits to generate a combined bit stream, and decode the combined bit stream.
摘要翻译：发射机可以包括编码器，其被配置为基于第一编码速率对数据序列进行编码，以产生具有至少一个第一重复比特的第一比特的第一编码比特流，并且基于第二不同编码率对该数据序列进行编码以产生第二编码比特流，具有具有至少一个第二重复比特的第二比特，其中第一和第二编码比特流各自完全表示数据序列。接收机可以包括被配置为通过识别第一编码比特流中的重复比特和对应于相同比特位置的第二编码比特流中的重复比特来产生识别的重复比特的电路，组合第一编码比特流和第二编码比特流包括所识别的重复比特以产生组合比特流，并对组合的比特流进行解码。

5. 发明授权

US08311152B1 Adaptive OFDM receiver based on carrier frequency offset 有权
标题翻译：基于载波频偏的自适应OFDM接收机
公开(公告)号：US08311152B1
公开(公告)日：2012-11-13
申请号：US10986110
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： H03K9/00 , H04L27/22 , H04L23/00 , H04J11/00
CPC分类号： H04L27/2657 , H04B7/01
摘要： An adaptive receiver comprises a receiver module that receives an orthogonal frequency division multiplexing (OFDM) signal. An operating parameters module monitors at least one operating parameter of the receiver module and generates a select signal based the at least one operating parameter. An estimator module selects between first and second algorithms based on the select signal and selectively estimates a carrier frequency offset (CFO) of the OFDM signal using the one of the first and second algorithms. Alternately, an estimator module adjusts algorithm operating parameters of a first algorithm based on the select signal and selectively estimates a carrier frequency offset (CFO) of the OFDM signal using the selected algorithm operating parameters of the first algorithm.
摘要翻译：自适应接收机包括接收正交频分复用（OFDM）信号的接收机模块。操作参数模块监视接收机模块的至少一个操作参数，并基于该至少一个操作参数生成选择信号。估计器模块基于选择信号在第一和第二算法之间进行选择，并且使用第一和第二算法之一选择性地估计OFDM信号的载波频率偏移（CFO）。或者，估计器模块基于选择信号来调整第一算法的算法运行参数，并且使用所选择的算法运算参数选择性地估计OFDM信号的载波频率偏移（CFO）。

6. 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。

7. 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。

8. 发明授权

US08315568B1 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：US08315568B1
公开(公告)日：2012-11-20
申请号：US13345650
申请日：2012-01-06
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。

9. 发明授权

US07639733B1 Maximum likelihood estimation of time and frequency offset for OFDM systems 有权
标题翻译： OFDM系统的时间和频率偏移的最大似然估计
公开(公告)号：US07639733B1
公开(公告)日：2009-12-29
申请号：US12194445
申请日：2008-08-19
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： H04L27/30
CPC分类号： H04L27/2657 , H04L27/2662 , H04L27/2678
摘要： A receiver in an OFDM system may include a joint maximum likelihood (ML) estimator that estimates both time offset and frequency offset. The estimator may use samples in an observation window to estimate the time offset and frequency offset.
摘要翻译： OFDM系统中的接收机可以包括估计时间偏移和频率偏移的联合最大似然（ML）估计器。估计器可以使用观测窗口中的样本来估计时间偏移和频率偏移。

10. 发明授权

US07596182B1 Optimum symbol timing estimation with various performance measures for OFDM systems 有权
标题翻译：用于OFDM系统的各种性能测量的最佳符号定时估计
公开(公告)号：US07596182B1
公开(公告)日：2009-09-29
申请号：US11002786
申请日：2004-12-01
申请人： Jungwon Lee , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou
发明人： Jungwon Lee , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou
IPC分类号： H04L5/12 , H04L27/06 , H03M13/03
CPC分类号： H04L27/2662 , H04L27/2676
摘要： A receiver in an OFDM system may include a multi-mode estimator to estimate symbol timing offset for different performance measures. In addition to a maximum likelihood estimation mode, the estimator may have a minimum failure probability estimation mode, a minimum mean square error estimation mode, and a minimum modified mean square error estimation mode.
摘要翻译： OFDM系统中的接收机可以包括用于针对不同性能测量来估计符号定时偏移的多模估计器。除了最大似然估计模式之外，估计器可以具有最小故障概率估计模式，最小均方误差估计模式和最小修正均方误差估计模式。

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