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11. 发明申请

US20080075180A1 Frequency domain equalizer for single antenna radio 失效
标题翻译：用于单天线无线电的频域均衡器
公开(公告)号：US20080075180A1
公开(公告)日：2008-03-27
申请号：US11641933
申请日：2006-12-19
申请人： Junqiang Li , Nelson R. Sollenberger
发明人： Junqiang Li , Nelson R. Sollenberger
IPC分类号： H04K1/10 , H04B1/10
CPC分类号： H04L25/03038 , H04L25/0204 , H04L25/0212 , H04L25/022 , H04L2025/03426 , H04L2025/03605
摘要： A Radio Frequency (RF) transceiver includes a RF front end and a baseband processing module coupled to the RF front end that is operable to receive a time domain signal that includes time domain training symbols and time domain data symbols. The baseband processing module processes the time domain training symbols to produce a time domain channel estimate, Fast Fourier Transformer operations that convert the time domain channel estimate to the frequency domain to produce a frequency domain channel estimate, weight calculation operations that produce frequency domain equalizer coefficients based upon the frequency domain channel estimate, Inverse Fast Fourier Transformer operations that convert the frequency domain equalizer coefficients to the time domain to produce time domain equalizer coefficients, and equalization operations that equalize the time domain data symbols using the time domain equalizer coefficients.
摘要翻译：射频（RF）收发器包括RF前端和耦合到RF前端的基带处理模块，其可操作以接收包括时域训练符号和时域数据符号的时域信号。基带处理模块处理时域训练符号以产生时域信道估计，将时域信道估计转换为频域以产生频域信道估计的快速傅里叶变换器操作，产生频域均衡器系数的权重计算操作基于频域信道估计，将频域均衡器系数转换到时域以产生时域均衡器系数的快速傅里叶逆变换器操作，以及使用时域均衡器系数均衡时域数据符号的均衡操作。

12. 发明授权

US07769082B2 Frequency domain equalizer for single antenna radio 失效
标题翻译：用于单天线无线电的频域均衡器
公开(公告)号：US07769082B2
公开(公告)日：2010-08-03
申请号：US11641933
申请日：2006-12-19
申请人： Junqiang Li , Nelson R. Sollenberger
发明人： Junqiang Li , Nelson R. Sollenberger
IPC分类号： H03H7/30
CPC分类号： H04L25/03038 , H04L25/0204 , H04L25/0212 , H04L25/022 , H04L2025/03426 , H04L2025/03605
摘要： A Radio Frequency (RF) transceiver includes a RF front end and a baseband processing module coupled to the RF front end that is operable to receive a time domain signal that includes time domain training symbols and time domain data symbols. The baseband processing module processes the time domain training symbols to produce a time domain channel estimate, Fast Fourier Transformer operations that convert the time domain channel estimate to the frequency domain to produce a frequency domain channel estimate, weight calculation operations that produce frequency domain equalizer coefficients based upon the frequency domain channel estimate, Inverse Fast Fourier Transformer operations that convert the frequency domain equalizer coefficients to the time domain to produce time domain equalizer coefficients, and equalization operations that equalize the time domain data symbols using the time domain equalizer coefficients.
摘要翻译：射频（RF）收发器包括RF前端和耦合到RF前端的基带处理模块，其可操作以接收包括时域训练符号和时域数据符号的时域信号。基带处理模块处理时域训练符号以产生时域信道估计，将时域信道估计转换为频域以产生频域信道估计的快速傅里叶变换器操作，产生频域均衡器系数的权重计算操作基于频域信道估计，将频域均衡器系数转换到时域以产生时域均衡器系数的快速傅里叶逆变换器操作，以及使用时域均衡器系数均衡时域数据符号的均衡操作。

13. 发明申请

US20080075189A1 Equalizer coefficient determination in the frequency domain for MIMO/MISO radio 审中-公开
标题翻译： MIMO / MISO无线电频域的均衡器系数确定
公开(公告)号：US20080075189A1
公开(公告)日：2008-03-27
申请号：US11593911
申请日：2006-11-07
申请人： Junqiang Li , Nelson R. Sollenberger
发明人： Junqiang Li , Nelson R. Sollenberger
IPC分类号： H04L1/02 , H04K1/10
CPC分类号： H04L25/03006 , H04L2025/03426 , H04L2025/03605
摘要： A Radio Frequency (RF) receiver includes a RF front end and a baseband processing module coupled to the RF front end that is operable to receive a time domain signal that includes multiple information signals, each having training symbols and time domain data symbols. The baseband processing module includes a channel estimator that processes the training symbols to produce respective time domain channel estimates, a Fast Fourier Transformer converts the time domain channel estimates to the frequency domain to produce frequency domain channel estimates, a weight calculator operable to produce frequency domain equalizer coefficients based upon the frequency domain channel estimates, an Inverse Fast Fourier Transformer operable to convert the frequency domain equalizer coefficients to the time domain to produce time domain equalizer coefficients, and an equalizer operable to equalize the time domain data symbols using the time domain equalizer coefficients. The RF receiver supports STTD, MISO, and MIMO operations.
摘要翻译：射频（RF）接收机包括RF前端和耦合到RF前端的基带处理模块，其可操作以接收包括多个信息信号的时域信号，每个信号信号具有训练符号和时域数据符号。基带处理模块包括处理训练符号以产生相应的时域信道估计的信道估计器，快速傅立叶变换器将时域信道估计转换为频域以产生频域信道估计，可用于产生频域的权重计算器基于频域信道估计的均衡器系数，用于将频域均衡器系数转换到时域以产生时域均衡器系数的逆快速傅立叶变换器，以及可用于使用时域均衡器来均衡时域数据符号的均衡器系数。 RF接收机支持STTD，MISO和MIMO操作。

14. 发明申请

US20080130607A1 Method and System for Multimode DC Offset Compensation 审中-公开
标题翻译：多模直流偏移补偿方法与系统
公开(公告)号：US20080130607A1
公开(公告)日：2008-06-05
申请号：US11565562
申请日：2006-11-30
申请人： Junqiang Li , Nelson Sollenberger , Li Fung Chang
发明人： Junqiang Li , Nelson Sollenberger , Li Fung Chang
IPC分类号： H04B7/216 , H04B1/12 , H04L25/06
CPC分类号： H03D3/008
摘要： Aspects of a method and system for multimode DC offset compensation are presented. Aspects of the system may include accumulating a selected number of signal samples, determining an average of the accumulated signal samples, and keeping a running total of the average for use feedback signal generation. The signal samples may be, for example, samples of WCDMA signals. By keeping track of the signal offset error, the signal offset error, or residual DC, may be determined. For example the signal offset error may comprise a DC component and/or a sinusoidal component. The number of signal samples to accumulate for the average may be based on the signal offset error. For example, a threshold may be determined as part of design of an embodiment of the invention.
摘要翻译：提出了一种用于多模直流偏移补偿的方法和系统。系统的方面可以包括累积选定数量的信号采样，确定累积信号样本的平均值，并保持平均值的运行总和以供使用反馈信号产生。信号样本可以是例如WCDMA信号的样本。通过跟踪信号偏移误差，可以确定信号偏移误差或残差DC。例如，信号偏移误差可以包括DC分量和/或正弦分量。可以基于信号偏移误差来累积平均值的信号样本数。例如，可以将阈值确定为本发明的实施例的设计的一部分。

15. 外观设计

USD972296S1 Tool box 有权
公开(公告)号：USD972296S1
公开(公告)日：2022-12-13
申请号：US29838084
申请日：2022-05-10
申请人： Junqiang Li
设计人： Junqiang Li

16. 发明授权

US08270545B2 Methods and systems using fine frequency tracking loop design for WiMAX 失效
标题翻译：用于WiMAX的精细频率跟踪环路设计的方法和系统
公开(公告)号：US08270545B2
公开(公告)日：2012-09-18
申请号：US12395675
申请日：2009-03-01
申请人： Junqiang Li , Madihally J. Narasimha , Je Woo Kim
发明人： Junqiang Li , Madihally J. Narasimha , Je Woo Kim
IPC分类号： H04L27/06
CPC分类号： H04L27/2675 , H04L27/266
摘要： Certain embodiments of the present disclosure relate to a method for tracking of a carrier frequency offset. A soft combined frequency tracking discriminator is proposed as a part of the closed loop structure that can provide fast tracking of the frequency offset in an initial pull-in mode, and can also track small residual frequency variance in a fine-tracking mode.
摘要翻译：本公开的某些实施例涉及用于跟踪载波频率偏移的方法。提出了一种软组合频率跟踪鉴别器作为闭环结构的一部分，其可以提供初始引入模式中的频率偏移的快速跟踪，并且还可以在精细跟踪模式中跟踪小的残余频率方差。

17. 发明授权

US08155254B2 Methods and systems using FFT window tracking algorithm 失效
标题翻译：方法和系统采用FFT窗口跟踪算法
公开(公告)号：US08155254B2
公开(公告)日：2012-04-10
申请号：US12337632
申请日：2008-12-18
申请人： Junqiang Li , Je Woo Kim , Matthias Brehler , Michael McCloud
发明人： Junqiang Li , Je Woo Kim , Matthias Brehler , Michael McCloud
IPC分类号： H03D1/04
CPC分类号： H04L27/2657 , H04L27/2607 , H04L27/2665
摘要： Techniques for the adjustment of a position of Fast Fourier Transform (FFT) window are provided. The adjustment may be based on the condition that the length of channel impulse response is larger than the length of cyclic prefix. The technique may determine a position of the FFT window that attempts to maximize carrier-to-noise (C/N) ratio value measured at the receiver.
摘要翻译：提供了用于调整快速傅立叶变换（FFT）窗口位置的技术。调整可以基于信道脉冲响应的长度大于循环前缀的长度的条件。该技术可以确定尝试最大化在接收机处测量的载波噪声（C / N）比值的FFT窗口的位置。

18. 发明申请

US20090122918A1 Methods for Compensating for I/Q Imbalance in OFDM Systems 审中-公开
标题翻译： OFDM系统补偿I / Q不平衡的方法
公开(公告)号：US20090122918A1
公开(公告)日：2009-05-14
申请号：US12266534
申请日：2008-11-06
申请人： Junqiang Li , Baoguo Yang , Yue Chen
发明人： Junqiang Li , Baoguo Yang , Yue Chen
IPC分类号： H04L25/06
CPC分类号： H04L27/2647 , H04L27/0014 , H04L2027/0024
摘要： The present invention relates to methods for demodulating orthogonal frequency division multiplexing (OFDM) modulated signals. In particular, this invention relates to methods for in-phase (I) and quadrature phase (Q) imbalance compensation in OFDM systems. For example, the present invention relates to methods for calculating an IQ imbalance compensated signal from a received signal, comprising the steps of: removing DC from the received signal; calculating an autocorrelation matrix of IQ signal vector of the received signal; estimating IQ imbalance compensation values, K1 and K2, as a function of an amplitude imbalance, g, and a phase imbalance, θ; and calculating an IQ compensated signal as a function of the estimated K1 and K2.
摘要翻译：本发明涉及用于解调正交频分复用（OFDM）调制信号的方法。特别地，本发明涉及OFDM系统中的同相（I）和正交相（Q）不平衡补偿的方法。例如，本发明涉及从接收信号计算IQ不平衡补偿信号的方法，包括以下步骤：从接收信号中去除DC; 计算接收信号的IQ信号向量的自相关矩阵; 估计IQ不平衡补偿值K1和K2作为幅度不平衡g和相位不平衡θ的函数; 以及计算作为估计的K1和K2的函数的IQ补偿信号。

19. 外观设计

USD951049S1 Soldering iron 有权
公开(公告)号：USD951049S1
公开(公告)日：2022-05-10
申请号：US29794512
申请日：2021-06-14
申请人： Junqiang Li
设计人： Junqiang Li

20. 发明申请

US20110228886A1 FAST LINK RE-SYNCHRONIZATION FOR TIME-SLICED OFDM SIGNALS 审中-公开
标题翻译：用于时间延迟的OFDM信号的快速链路重新同步
公开(公告)号：US20110228886A1
公开(公告)日：2011-09-22
申请号：US13003060
申请日：2009-07-08
申请人： Junqiang Li , Baoguo Yang
发明人： Junqiang Li , Baoguo Yang
IPC分类号： H04L7/04
CPC分类号： H04L1/0045 , H04L27/2656 , H04L27/2662
摘要： Methods having corresponding apparatus and computer-readable media comprise: receiving an estimated frame index, and an estimated symbol index, for a time-sliced OFDM signal; identifying a plurality of possible frame indexes, and a plurality of possible symbol indexes, based on the estimated frame index and the estimated symbol index; selecting a plurality of possible forward error correction code offsets based on the possible frame indexes and the possible symbol indexes; and selecting one of the possible frame indexes, and one of the possible symbol indexes, based on the possible forward error correction code offsets and a SYNC byte of the time-sliced OFDM signal.
摘要翻译：具有对应装置和计算机可读介质的方法包括：对时分片OFDM信号接收估计帧索引和估计符号索引; 基于估计的帧索引和所估计的符号索引来识别多个可能的帧索引和多个可能的符号索引; 基于可能的帧索引和可能的符号索引来选择多个可能的前向纠错码偏移; 并且基于时分片OFDM信号的可能的前向纠错码偏移和SYNC字节来选择可能的帧索引之一和可能的符号索引中的一个。

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