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1. 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

2. 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。

3. 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。

4. 发明申请

US20100135377A1 FREQUENCY DOMAIN EQUALIZER FOR DUAL ANTENNA RADIO 有权
标题翻译：用于双天线无线电的频域均衡器
公开(公告)号：US20100135377A1
公开(公告)日：2010-06-03
申请号：US12703311
申请日：2010-02-10
申请人： Junqiang Li , Mark David Hahm , Nelson R. Sollenberger , Li Fung Chang
发明人： Junqiang Li , Mark David Hahm , Nelson R. Sollenberger , Li Fung Chang
IPC分类号： H04B1/10 , H03K5/159
CPC分类号： H04L25/03038 , H04L25/0204 , H04L25/0212 , H04L25/022 , 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 time domain training symbols and time domain data symbols. The baseband processing module includes a channel estimator operable to process the time domain training symbols to produce a time domain channel estimate, a Fast Fourier Transformer operable to convert the time domain channel estimate to the frequency domain to produce a frequency domain channel estimate, a weight calculator operable to produce frequency domain equalizer coefficients based upon the frequency domain channel estimate, an Inverse Fast Fourier Transformer operable to converting 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.
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时域训练符号和时域数据符号的时域信号。基带处理模块包括信道估计器，其可操作以处理时域训练符号以产生时域信道估计;快速傅立叶变换器，其可操作以将时域信道估计转换为频域以产生频域信道估计，权重计算器，其可操作以基于频域信道估计产生频域均衡器系数;反傅里叶变换器，其可操作以将频域均衡器系数转换到时域以产生时域均衡器系数;以及均衡器，其可操作以均衡时域数据符号使用时域均衡器系数。

5. 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。

6. 发明申请

US20080075209A1 Frequency domain equalizer for dual antenna radio 有权
标题翻译：双天线收音机的频域均衡器
公开(公告)号：US20080075209A1
公开(公告)日：2008-03-27
申请号：US11524584
申请日：2006-09-21
申请人： Junqiang Li , Mark David Hahm , Nelson R. Sollenberger , Li Fung Chang
发明人： Junqiang Li , Mark David Hahm , Nelson R. Sollenberger , Li Fung Chang
IPC分类号： H04L1/02 , H04B1/10
CPC分类号： H04L25/03038 , H04L25/0204 , H04L25/0212 , H04L25/022 , 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 time domain training symbols and time domain data symbols. The baseband processing module includes a channel estimator operable to process the time domain training symbols to produce a time domain channel estimate, a Fast Fourier Transformer operable to convert the time domain channel estimate to the frequency domain to produce a frequency domain channel estimate, a weight calculator operable to produce frequency domain equalizer coefficients based upon the frequency domain channel estimate, an Inverse Fast Fourier Transformer operable to converting 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.
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时域训练符号和时域数据符号的时域信号。基带处理模块包括信道估计器，其可操作以处理时域训练符号以产生时域信道估计;快速傅立叶变换器，其可操作以将时域信道估计转换为频域以产生频域信道估计，权重计算器，其可操作以基于频域信道估计产生频域均衡器系数;反傅里叶变换器，其可操作以将频域均衡器系数转换到时域以产生时域均衡器系数;以及均衡器，其可操作以均衡时域数据符号使用时域均衡器系数。

7. 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。

8. 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

9. 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。

10. 发明授权

US07623572B2 Noise variance estimation for frequency domain equalizer coefficient determination 失效
标题翻译：频域均衡器系数确定的噪声方差估计
公开(公告)号：US07623572B2
公开(公告)日：2009-11-24
申请号：US11639782
申请日：2006-12-15
申请人： Junqiang Li
发明人： Junqiang Li
IPC分类号： H03H7/30
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 determine equalizer coefficients for a composite signal that includes a first information signal and a second information signal. First and second information signal channel estimates and channel powers based upon training symbols are determined. A composite signal power is determined. A noise variance of the composite signal is determined based upon the first information signal channel power, the second information signal channel power, and the composite signal power. A plurality of equalizer coefficients are determined based upon the first information signal channel estimate, the second information signal channel estimate, and the noise variance of the composite signal.
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，其可用于确定包括第一信息信号和第二信息信号的复合信号的均衡器系数。确定基于训练符号的第一和第二信息信道信道估计和信道功率。确定复合信号功率。基于第一信息信道功率，第二信息信道功率和复合信号功率来确定复合信号的噪声方差。基于第一信息信道估计，第二信息信道信道估计和复合信号的噪声方差来确定多个均衡器系数。

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