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公开(公告)号：US07627031B2
公开(公告)日：2009-12-01
申请号：US11186241
申请日：2005-07-21
申请人： Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Edem Ibragimov , Fabian Giroud
发明人： Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Edem Ibragimov , Fabian Giroud
IPC分类号： H03H7/30
CPC分类号： H04L7/0062 , H04L7/0029 , H04L25/03057 , H04L2025/03503
摘要： An apparatus and method for adaptively introducing a compensating signal latency related to a signal latency of a data symbol decision circuit. Adaptive timing control circuitry, including an interpolating mixer implemented as a tapped delay line with correlated tap coefficients, introduces a latency adaptively and substantially matching the latency of the data decision circuit for use within an adaptive equalizer, thereby minimizing the mean-squared error of such decision circuit. This adaptive latency is used in generating the feedback error signal which, in turn, can be used by the feedforward equalizer for dynamically adjusting its adaptive filter tap coefficients.
摘要翻译： 一种用于自适应地引入与数据符号判定电路的信号等待时间相关的补偿信号延迟的装置和方法。 自适应定时控制电路，包括实现为具有相关抽头系数的抽头延迟线的内插混频器，自适应地和基本上匹配数据判决电路的等待时间以在自适应均衡器内使用，从而最小化这样的均方误差 决策电路。 该自适应等待时间用于产生反馈误差信号，反馈误差信号又可由前馈均衡器用于动态调整其自适应滤波器抽头系数。
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2.发明授权Adaptive signal equalizer with adaptive error timing and precursor/postcursor configuration control 有权自适应信号均衡器，具有自适应误差定时和前置/后端配置控制公开(公告)号：US07266145B2
公开(公告)日：2007-09-04
申请号：US10321876
申请日：2002-12-17
申请人： Venugopal Balasubramonian , Jishnu Bhattacharjee , Edem Ibragimov , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Qian Yu
发明人： Venugopal Balasubramonian , Jishnu Bhattacharjee , Edem Ibragimov , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Qian Yu
CPC分类号： H04L25/03057 , H03H21/0012 , H03H2021/0096 , H04L7/0029 , H04L7/0062 , H04L7/0079 , H04L2025/0349 , H04L2025/03611
摘要： An adaptive signal equalizer with a feedforward filter in which the feedback error signal and corresponding incoming data signal are dynamically aligned in time using signal interpolation, and further, to control the precursor/postcursor filter taps configuration, thereby producing more adaptive filter tap coefficient signals for significantly improved and robust signal equalization.
摘要翻译： 一种具有前馈滤波器的自适应信号均衡器，其中反馈误差信号和相应的输入数据信号在时间上使用信号插值动态对准，此外，控制前驱/后沿滤波器抽头配置，由此产生更多的自适应滤波器抽头系数信号， 显着改善和鲁棒的信号均衡。
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3.发明授权Channel monitoring and identification and performance monitoring in a flexible high speed signal processor engine 有权在灵活的高速信号处理器引擎中进行信道监控和识别和性能监控公开(公告)号：US07561617B1
公开(公告)日：2009-07-14
申请号：US11859649
申请日：2007-09-21
申请人： Abhijit G. Shanbhag , Abhijit Phanse , Jishnu Bhattacharjee , Debanjan Mukherjee , Prashant Choudhary , Edem Ibragimov , Venugopal Balasubramonian , Qian Yu , Madabusi Govindarajan
发明人： Abhijit G. Shanbhag , Abhijit Phanse , Jishnu Bhattacharjee , Debanjan Mukherjee , Prashant Choudhary , Edem Ibragimov , Venugopal Balasubramonian , Qian Yu , Madabusi Govindarajan
IPC分类号： H03H7/30
CPC分类号： H04L25/03063 , H04L25/03044 , H04L2025/03617
摘要： Systems and methods are disclosed to provide channel monitoring and/or performance monitoring for a communication channel. For example, in accordance with an embodiment of the present invention, an equalizer is disclosed that equalizes for channel distortions and also provides channel and performance monitoring information, such as for example bandwidth estimation, channel identification, signal-to-noise ratio, chromatic dispersion, and/or polarization-mode dispersion.
摘要翻译： 公开了系统和方法来为通信信道提供信道监测和/或性能监测。 例如，根据本发明的实施例，公开了一种对于信道失真进行均衡的均衡器，并且还提供信道和性能监视信息，例如带宽估计，信道识别，信噪比，色散 ，和/或偏振模色散。
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公开(公告)号：US06922440B2
公开(公告)日：2005-07-26
申请号：US10321893
申请日：2002-12-17
申请人： Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Edem Ibragimov
发明人： Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Edem Ibragimov
CPC分类号： H04L7/0062 , H04L7/0029 , H04L25/03057 , H04L2025/03503
摘要： An apparatus and method for adaptively introducing a compensating signal latency related to a signal latency of a data symbol decision circuit. Adaptive timing control circuitry, including an interpolating mixer implemented as a tapped delay line with correlated tap coefficients, introduces a latency adaptively and substantially matching the latency of the data decision circuit for use within an adaptive equalizer, thereby minimizing the mean-squared error of such decision circuit. This adaptive latency is used in generating the feedback error signal which, in turn, can be used by the feedforward equalizer for dynamically adjusting its adaptive filter tap coefficients.
摘要翻译： 一种用于自适应地引入与数据符号判定电路的信号等待时间相关的补偿信号延迟的装置和方法。 自适应定时控制电路，包括实现为具有相关抽头系数的抽头延迟线的内插混频器，自适应地和基本上匹配数据判决电路的等待时间以在自适应均衡器内使用，从而最小化这样的均方误差 决策电路。 该自适应等待时间用于产生反馈误差信号，反馈误差信号又可由前馈均衡器用于动态调整其自适应滤波器抽头系数。
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公开(公告)号：US07379495B2
公开(公告)日：2008-05-27
申请号：US10789702
申请日：2004-02-27
申请人： Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Edem Ibragimov , Fabian Giroud
发明人： Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Debanjan Mukherjee , Abhijit Phanse , Abhijit G. Shanbhag , Edem Ibragimov , Fabian Giroud
IPC分类号： H04B3/46
CPC分类号： H04L7/0062 , H04L7/0029 , H04L25/03057 , H04L2025/03503
摘要： An apparatus and method for adaptively introducing a compensating signal latency related to a signal latency of a data symbol decision circuit. Adaptive timing control circuitry, including an interpolating mixer implemented as a tapped delay line with correlated tap coefficients, introduces a latency adaptively and substantially matching the latency of the data decision circuit for use within an adaptive equalizer, thereby minimizing the mean-squared error of such decision circuit. This adaptive latency is used in generating the feedback error signal which, in turn, can be used by the feedforward equalizer for dynamically adjusting its adaptive filter tap coefficients.
摘要翻译： 一种用于自适应地引入与数据符号判定电路的信号等待时间相关的补偿信号延迟的装置和方法。 自适应定时控制电路，包括实现为具有相关抽头系数的抽头延迟线的内插混频器，自适应地和基本上匹配数据判决电路的等待时间以在自适应均衡器内使用，从而最小化这样的均方误差 决策电路。 该自适应等待时间用于产生反馈误差信号，反馈误差信号又可由前馈均衡器用于动态调整其自适应滤波器抽头系数。
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6.发明授权Channel monitoring and identification and performance monitoring in a flexible high speed signal processor engine 有权在灵活的高速信号处理器引擎中进行信道监控和识别和性能监控公开(公告)号：US07339988B1
公开(公告)日：2008-03-04
申请号：US10614587
申请日：2003-07-03
申请人： Abhijit G. Shanbhag , Abhijit Phanse , Jishnu Bhattacharjee , Debanjan Mukherjee , Prashant Choudhary , Edem Ibragimov , Venugopal Balasubramonian , Qian Yu , Madabusi Govindarajan
发明人： Abhijit G. Shanbhag , Abhijit Phanse , Jishnu Bhattacharjee , Debanjan Mukherjee , Prashant Choudhary , Edem Ibragimov , Venugopal Balasubramonian , Qian Yu , Madabusi Govindarajan
CPC分类号： H04L25/03063 , H04L25/03044 , H04L2025/03617
摘要： Systems and methods are disclosed to provide channel monitoring and/or performance monitoring for a communication channel. For example, in accordance with an embodiment of the present invention, an equalizer is disclosed that equalizes for channel distortions and also provides channel and performance monitoring information, such as for example bandwidth estimation, channel identification, signal-to-noise ratio, chromatic dispersion, and/or polarization-mode dispersion.
摘要翻译： 公开了系统和方法来为通信信道提供信道监测和/或性能监测。 例如，根据本发明的实施例，公开了一种对于信道失真进行均衡的均衡器，并且还提供信道和性能监视信息，例如带宽估计，信道识别，信噪比，色散 ，和/或偏振模色散。
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公开(公告)号：US07016406B1
公开(公告)日：2006-03-21
申请号：US10426588
申请日：2003-04-29
申请人： Abhijit Phanse , Abhijit G. Shanbhag , Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Prashant Choudhary , Debanjan Mukherjee , Fabian Giroud , Edem Ibragimov
发明人： Abhijit Phanse , Abhijit G. Shanbhag , Qian Yu , Venugopal Balasubramonian , Jishnu Bhattacharjee , Prashant Choudhary , Debanjan Mukherjee , Fabian Giroud , Edem Ibragimov
IPC分类号： H03H7/40
CPC分类号： H04L25/03038 , H04L2025/03477 , H04L2025/03509 , H04L2025/03617
摘要： Tap coefficients for fractionally-spaced equalizers are updated iteratively using error statistics from an input bit stream and an output bit stream, such as from a forward error correction circuit. The process continues until the errors converge to a sufficiently small number. Knowledge of the error patterns are used apriori to adaptively change the tap coefficients in a feedforward filter.
摘要翻译： 使用来自输入比特流和输出比特流（例如来自前向纠错电路）的误差统计来迭代地更新用于分数间隔均衡器的抽头系数。 该过程继续，直到错误收敛到足够小的数量。 使用错误模式的知识用于自适应地改变前馈滤波器中的抽头系数。
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8.发明授权Adaptive signal equalizer with adaptive error timing and precursor/postcursor configuration control 有权自适应信号均衡器，具有自适应误差定时和前置/后端配置控制公开(公告)号：US07421021B2
公开(公告)日：2008-09-02
申请号：US11759720
申请日：2007-06-07
申请人： Venugopal Balasubramonian , Jishnu Bhattacharjee , Edem Ibragimov , Debanjan Mukherjee , Abhijit Phanse , Abhijit Shanbhag , Qian Yu
发明人： Venugopal Balasubramonian , Jishnu Bhattacharjee , Edem Ibragimov , Debanjan Mukherjee , Abhijit Phanse , Abhijit Shanbhag , Qian Yu
CPC分类号： H04L25/03057 , H03H21/0012 , H03H2021/0096 , H04L7/0029 , H04L7/0062 , H04L7/0079 , H04L2025/0349 , H04L2025/03611
摘要： An adaptive signal equalizer with a feedforward filter in which the feedback error signal and corresponding incoming data signal are dynamically aligned in time using signal interpolation, and further, to control the precursor/postcursor filter taps configuration, thereby producing more adaptive filter tap coefficient signals for significantly improved and robust signal equalization.
摘要翻译： 一种具有前馈滤波器的自适应信号均衡器，其中反馈误差信号和相应的输入数据信号在时间上使用信号插值动态对准，此外，控制前驱/后沿滤波器抽头配置，由此产生更多的自适应滤波器抽头系数信号， 显着改善和鲁棒的信号均衡。
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9.发明授权Adaptive coefficient signal generator for adaptive signal equalizers with fractionally-spaced feedback 有权用于具有分数间隔反馈的自适应信号均衡器的自适应系数信号发生器公开(公告)号：US06940898B2
公开(公告)日：2005-09-06
申请号：US10290571
申请日：2002-11-08
申请人： Abhijit G. Shanbhag , Qian Yu , Abhijit Phanse , Jishnu Bhattacharjee , Debanjan Mukherjee , Fabian Giroud , Venugopal Balasubramonian
发明人： Abhijit G. Shanbhag , Qian Yu , Abhijit Phanse , Jishnu Bhattacharjee , Debanjan Mukherjee , Fabian Giroud , Venugopal Balasubramonian
CPC分类号： H04L25/0307 , H03H21/0012 , H03H2021/0096 , H04L25/03063 , H04L2025/0349 , H04L2025/03509 , H04L2025/03611
摘要： An adaptive coefficient signal generator for use in an adaptive signal equalizer with fractionally-spaced feedback. The signals representing the feedback tap coefficients are generated in conjunction with a timing interpolation parameter such that the fractionally-spaced feedback circuitry dynamically emulates symbol-spaced feedback circuitry.
摘要翻译： 一种用于具有分数间隔反馈的自适应信号均衡器中的自适应系数信号发生器。 代表反馈抽头系数的信号与定时内插参数一起产生，使得分数间隔的反馈电路动态地仿真符号间隔反馈电路。
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10.发明申请ADAPTIVE SIGNAL EQUALIZER WITH ADAPTIVE ERROR TIMING AND PRECURSOR/POSTCURSOR CONFIGURATION CONTROL 有权具有自适应错误时序的自适应信号均衡器和前端/ POSTAURSOR配置控制公开(公告)号：US20070230557A1
公开(公告)日：2007-10-04
申请号：US11759720
申请日：2007-06-07
申请人： Venugopal Balasubramonian , Jishnu Bhattacharjee , Edem Ibragimov , Debanjan Mukherjee , Abhijit Phanse , Abhijit Shanbhag , Qian Yu
发明人： Venugopal Balasubramonian , Jishnu Bhattacharjee , Edem Ibragimov , Debanjan Mukherjee , Abhijit Phanse , Abhijit Shanbhag , Qian Yu
IPC分类号： H03H7/40
CPC分类号： H04L25/03057 , H03H21/0012 , H03H2021/0096 , H04L7/0029 , H04L7/0062 , H04L7/0079 , H04L2025/0349 , H04L2025/03611
摘要： An adaptive signal equalizer with a feedforward filter in which the feedback error signal and corresponding incoming data signal are dynamically aligned in time using signal interpolation, and further, to control the precursor/postcursor filter taps configuration, thereby producing more adaptive filter tap coefficient signals for significantly improved and robust signal equalization.
摘要翻译： 一种具有前馈滤波器的自适应信号均衡器，其中反馈误差信号和相应的输入数据信号在时间上使用信号插值动态对准，此外，控制前驱/后沿滤波器抽头配置，由此产生更多的自适应滤波器抽头系数信号， 显着改善和鲁棒的信号均衡。
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