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1. 发明授权

US06608897B1 Double-talk insensitive NLMS algorithm 有权
标题翻译：双语不敏感的NLMS算法
公开(公告)号：US06608897B1
公开(公告)日：2003-08-19
申请号：US09175881
申请日：1998-10-21
申请人： Gary Q. Jin , Gordon J. Reesor , Thomas Qian
发明人： Gary Q. Jin , Gordon J. Reesor , Thomas Qian
IPC分类号： H04M176
CPC分类号： H04M9/082
摘要： A method of canceling echo signals in a telephone network operating in a double talk mode has been developed. A system for implementing the method is also presented. In the invention the conventional normalized least mean square (NLMS) algorithm for echo cancellers is modified such that echo path changes continue to be tracked even after a double talk condition has been detected. The modified algorithm, known herein as a double-talk normalized least mean square (DNLMS) algorithm adaptively adjusts the convergence rate based on the power difference between the echo signal or the residual signal and the far end signal.
摘要翻译：已经开发了以双通道模式操作的电话网络中消除回波信号的方法。还提出了一种实现该方法的系统。在本发明中，用于回波消除器的常规归一化最小均方（NLMS）算法被修改，使得即使在检测到双重通话条件之后，回波路径改变仍继续被跟踪。经修改的算法，这里称为双方通话归一化最小均方（DNLMS）算法，基于回波信号或残差信号与远端信号之间的功率差自适应地调整收敛速度。

2. 发明授权

US6138244A Timing recovery with minimum jitter movement 失效
标题翻译：具有最小抖动运动的定时恢复
公开(公告)号：US6138244A
公开(公告)日：2000-10-24
申请号：US163248
申请日：1998-09-30
申请人： Gary Q. Jin , Gordon J. Reesor
发明人： Gary Q. Jin , Gordon J. Reesor
IPC分类号： H04L7/00 , H04L7/02 , G06F1/12 , G06F1/04
CPC分类号： H04L7/0062 , H04L7/0083
摘要： A symbol synchronization and timing recovery method for stabilizing jitter in a data receiver is provided. A one tap LMS algorithm is used for a pre-cursor estimate. A dead zone is set around the desired timing location and the local clock in the receiver is updated only if the timing signal is outside of the dead zone.
摘要翻译：提供了一种用于稳定数据接收机中的抖动的符号同步和定时恢复方法。一次性LMS算法用于前置估计。在期望的定时位置周围设置死区，并且只有当定时信号在死区之外时才更新接收器中的本地时钟。

3. 发明授权

US06697423B1 Precursor decision feedback equalizer (PDFE) 失效
标题翻译：前身判决反馈均衡器（PDFE）
公开(公告)号：US06697423B1
公开(公告)日：2004-02-24
申请号：US09685489
申请日：2000-10-10
申请人： Gary Q. Jin , Gordon J. Reesor
发明人： Gary Q. Jin , Gordon J. Reesor
IPC分类号： H03H730
CPC分类号： H04L25/03057 , H04L2025/03363 , H04L2025/0349 , H04L2025/03694
摘要： A decision feedback equalizer is provided which is capable of canceling precursor Inter-Symbol Interference (ISI) even when knowledge of future data is unavailable. A novel DFE algorithm is utilized whereby the detection signal-to-noise ratio (SNR) is increased in two aspects: the precursor contribution is eliminated and the sampling location (relative to the channel response) is positioned at the maximum SNR location. As a result, the loop length for data transmission in a cable can be extended.
摘要翻译：提供了一种判决反馈均衡器，即使在将来数据的知识不可用的情况下，它也能够抵消先前的符号间干扰（ISI）。使用了一种新颖的DFE算法，从而在两个方面增加了检测信噪比（SNR）：前体贡献被消除，并且采样位置（相对于信道响应）位于最大SNR位置。结果，可以延长电缆中数据传输的环路长度。

4. 发明授权

US6122652A Tone and periodical signal detection 有权
标题翻译：音频和周期信号检测
公开(公告)号：US6122652A
公开(公告)日：2000-09-19
申请号：US161434
申请日：1998-09-24
申请人： Gary Q. Jin , Gordon J. Reesor
发明人： Gary Q. Jin , Gordon J. Reesor
IPC分类号： H04Q1/444 , H04Q1/45 , G06F17/10
CPC分类号： H04Q1/444 , H04Q1/45
摘要： Algorithms for quickly and efficiently detecting a periodic signal such as a DTMF signal in a telephone system are described. The algorithms, implemented in a tone detector, detect the periodicity of the input data and do not require an estimation of the tone frequency.
摘要翻译：描述用于快速有效地检测诸如电话系统中的DTMF信号的周期性信号的算法。在音调检测器中实现的算法检测输入数据的周期性，并且不需要对音调频率的估计。

5. 发明授权

US06757859B1 Parallel turbo trellis-coded modulation 失效
标题翻译：并行turbo网格编码调制
公开(公告)号：US06757859B1
公开(公告)日：2004-06-29
申请号：US09562325
申请日：2000-05-01
申请人： Gary Q. Jin
发明人： Gary Q. Jin
IPC分类号： H03M1329
CPC分类号： H03M13/258 , H03M13/2957 , H03M13/6561
摘要： An encoder for turbo coded trellis code modulation comprises an encoder data block for storing incoming data, and at least two recursive systematic convolutional encoders, said convolutional encoders being connected to receive data in parallel from said encoder data block. The decoder also employs a parallel implementation.
摘要翻译：用于turbo编码网格码调制的编码器包括用于存储输入数据的编码器数据块和至少两个递归系统卷积编码器，所述卷积编码器被连接以从所述编码器数据块并行地接收数据。解码器还采用并行实现。

6. 发明授权

US08971523B2 Over-sampled single-sided subband echo cancellation 有权
标题翻译：过采样单面子带回波消除
公开(公告)号：US08971523B2
公开(公告)日：2015-03-03
申请号：US13562175
申请日：2012-07-30
申请人： Gary Q. Jin
发明人： Gary Q. Jin
IPC分类号： H04M9/08 , H04R3/00 , H04B3/23
CPC分类号： H04R3/002 , H04B3/23
摘要： A method of echo cancellation, particularly for use in high definition applications, splits an input signal and reference signal into M single-sided sub-band. The subbanded signals are downsampled at a downsampling rate N, where N≦M, adaptively filtered, and recombined to produce an output signal. The sub-bands are preferably oversampled such that N
摘要翻译：回波消除的方法，特别是用于高清晰度应用中，将输入信号和参考信号分离成M单面子带。子带信号以下采样率N进行下采样，其中N＆NlE; M被自适应滤波并重组以产生输出信号。子带优选地被过采样，使得N

7. 发明授权

US07786811B2 Phase locked loop with adaptive filter for DCO synchronization 有权
标题翻译：锁相环与DCO同步的自适应滤波器
公开(公告)号：US07786811B2
公开(公告)日：2010-08-31
申请号：US12332553
申请日：2008-12-11
申请人： Gary Q. Jin
发明人： Gary Q. Jin
IPC分类号： H03L7/08 , H03L7/085 , H03L7/093
CPC分类号： H03L7/107 , H03L7/0994 , H03L7/1075 , H03L7/18 , H03L2207/50
摘要： A digital phase locked loop has a digital controlled oscillator, a feedback loop coupled to the output of said digital controlled oscillator, a phase detector for comparing a feedback signal from said feedback loop with a reference signal to produce a phase error signal, and a low pass filter for filtering the phase error signal for controlling said digital controlled oscillator. A bandwidth calculation unit calculates the required filter bandwidth based on the phase error. The bandwidth calculation unit then controls the bandwidth of said low pass filter, which is thus adaptively adjusted in accordance with the phase error.
摘要翻译：数字锁相环具有数字控制振荡器，耦合到所述数字控制振荡器的输出的反馈回路，用于将来自所述反馈回路的反馈信号与参考信号进行比较以产生相位误差信号的相位检测器，以及低滤波器，用于滤波用于控制所述数字控制振荡器的相位误差信号。带宽计算单元根据相位误差来计算所需的滤波器带宽。带宽计算单元然后控制所述低通滤波器的带宽，由此根据相位误差进行自适应调整。

8. 发明授权

US07280469B2 Efficient implementation of large size FFT 失效
标题翻译：高效实现大尺寸FFT
公开(公告)号：US07280469B2
公开(公告)日：2007-10-09
申请号：US09942628
申请日：2001-08-31
申请人： Gary Q. Jin
发明人： Gary Q. Jin
IPC分类号： H04J11/00 , H04B7/208
CPC分类号： H03H17/0266 , G06F17/142 , H04L5/02 , H04L27/263 , H04L27/2637 , H04L27/265 , H04L27/2653
摘要： A system and method of implementing a Fast Fourier Transform (FFT) function in a high data rate communication network. The communication network, employing technology such as VDSL and DMT or FDM, frequently implements a FFT at a transmitter to transfer frequency domain modulated signals into time domain signals. An IFFT is implemented at the receiver to obtain the original signal. The present system divides the channel bandwidth into sub-bands and performs the FFT function with multiple FFTs in order to reduce chip size and computation time.
摘要翻译：一种在高数据速率通信网络中实现快速傅里叶变换（FFT）功能的系统和方法。使用诸如VDSL和DMT或FDM的技术的通信网络经常在发射机处实施FFT以将频域调制信号传送到时域信号。在接收机处实现IFFT以获得原始信号。本系统将信道带宽划分为子带，并执行具有多个FFT的FFT功能，以减少芯片尺寸和计算时间。

9. 发明申请

US20130188797A1 Over-Sampled Single-Sided Subband Echo Cancellation 有权
标题翻译：超采样单侧子带回波消除
公开(公告)号：US20130188797A1
公开(公告)日：2013-07-25
申请号：US13562175
申请日：2012-07-30
申请人： Gary Q. Jin
发明人： Gary Q. Jin
IPC分类号： H04R3/00
CPC分类号： H04R3/002 , H04B3/23
摘要： A method of echo cancellation, particularly for use in high definition applications, splits an input signal and reference signal into M single-sided sub-band. The subbanded signals are downsampled at a downsampling rate N, where N≦M, adaptively filtered, and recombined to produce an output signal. The sub-bands are preferably oversampled such that N
摘要翻译：回波消除的方法，特别是用于高清晰度应用中，将输入信号和参考信号分离成M单面子带。子带信号以下采样率N进行下采样，其中N @ M被自适应滤波并重组以产生输出信号。子带优选地被过采样，使得N

10. 发明申请

US20090174490A1 PHASE LOCKED LOOP WITH ADAPTIVE FILTER FOR DCO SYNCHRONIZATION 有权
标题翻译：用于DCO同步的具有自适应滤波器的锁相环
公开(公告)号：US20090174490A1
公开(公告)日：2009-07-09
申请号：US12332553
申请日：2008-12-11
申请人： Gary Q. Jin
发明人： Gary Q. Jin
IPC分类号： H03L7/085
CPC分类号： H03L7/107 , H03L7/0994 , H03L7/1075 , H03L7/18 , H03L2207/50
摘要： A digital phase locked loop has a digital controlled oscillator, a feedback loop coupled to the output of said digital controlled oscillator, a phase detector for comparing a feedback signal from said feedback loop with a reference signal to produce a phase error signal, and a low pass filter for filtering the phase error signal for controlling said digital controlled oscillator. A bandwidth calculation unit calculates the required filter bandwidth based on the phase error. The bandwidth calculation unit then controls the bandwidth of said low pass filter, which is thus adaptively adjusted in accordance with the phase error.
摘要翻译：数字锁相环具有数字控制振荡器，耦合到所述数字控制振荡器的输出的反馈回路，用于将来自所述反馈回路的反馈信号与参考信号进行比较以产生相位误差信号的相位检测器，以及低滤波器，用于滤波用于控制所述数字控制振荡器的相位误差信号。带宽计算单元根据相位误差来计算所需的滤波器带宽。带宽计算单元然后控制所述低通滤波器的带宽，由此根据相位误差进行自适应调整。

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