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1. 发明授权

US07970290B2 Digital phase estimator, digital phase locked loop and optical coherent receiver 有权
标题翻译：数字相位估计器，数字锁相环和光相干接收机
公开(公告)号：US07970290B2
公开(公告)日：2011-06-28
申请号：US12026782
申请日：2008-02-06
申请人： Zhenning Tao , Lei Li , Jens C. Rasmussen
发明人： Zhenning Tao , Lei Li , Jens C. Rasmussen
IPC分类号： H04B10/06 , H04B10/08
CPC分类号： H04B10/6165 , H04B10/61 , H04B10/611 , H04B10/613
摘要： The present invention provides a digital phase estimator, a digital phase locked loop and an optical coherent receiver. The optical coherent receiver comprises a local oscillator laser, for supplying a local oscillator optical signal; an optical 90 degree frequency mixer, for mixing a received optical signal with the local oscillator optical signal; first and second balancing photoelectric detectors, for converting the optical signals outputted from the optical 90 degree frequency mixer into baseband electrical signals; first and second A/D converters, for respectively converting output signals from the first and the second balancing photoelectric detectors into digital signals; a digital phase locked loop, for compensating a phase difference between a carrier signal of the received optical signal and the local oscillator optical signal, and outputting the compensated signal; and a data recovering unit, for recovering data from the compensated signal.
摘要翻译：本发明提供数字相位估计器，数字锁相环和光学相干接收器。光学相干接收器包括用于提供本地振荡器光信号的本地振荡器激光器; 用于将接收到的光信号与本地振荡器光信号混合的光学90度混频器; 第一和第二平衡光电检测器，用于将从光学90度混频器输出的光信号转换成基带电信号; 第一和第二A / D转换器，用于将来自第一和第二平衡光电探测器的输出信号分别转换成数字信号; 数字锁相环，用于补偿所接收的光信号的载波信号与本地振荡器光信号之间的相位差，并输出补偿的信号; 以及数据恢复单元，用于从补偿信号中恢复数据。

2. 发明申请

US20080205905A1 DIGITAL PHASE ESTIMATOR, DIGITAL PHASE LOCKED LOOP AND OPTICAL COHERENT RECEIVER 有权
标题翻译：数字相位估计器，数字相位锁定和光学相干接收器
公开(公告)号：US20080205905A1
公开(公告)日：2008-08-28
申请号：US12026782
申请日：2008-02-06
申请人： Zhenning TAO , Lei Li , Jens C. Rasmussen
发明人： Zhenning TAO , Lei Li , Jens C. Rasmussen
IPC分类号： H04B10/06 , G06E1/04 , G06F17/10
CPC分类号： H04B10/6165 , H04B10/61 , H04B10/611 , H04B10/613
摘要： The present invention provides a digital phase estimator, a digital phase locked loop and an optical coherent receiver. The optical coherent receiver comprises a local oscillator laser, for supplying a local oscillator optical signal; an optical 90 degree frequency mixer, for mixing a received optical signal with the local oscillator optical signal; first and second balancing photoelectric detectors, for converting the optical signals outputted from the optical 90 degree frequency mixer into baseband electrical signals; first and second A/D converters, for respectively converting output signals from the first and the second balancing photoelectric detectors into digital signals; a digital phase locked loop, for compensating a phase difference between a carrier signal of the received optical signal and the local oscillator optical signal, and outputting the compensated signal; and a data recovering unit, for recovering data from the compensated signal.
摘要翻译：本发明提供数字相位估计器，数字锁相环和光学相干接收器。光学相干接收器包括用于提供本地振荡器光信号的本地振荡器激光器; 用于将接收到的光信号与本地振荡器光信号混合的光学90度混频器; 第一和第二平衡光电检测器，用于将从光学90度混频器输出的光信号转换成基带电信号; 第一和第二A / D转换器，用于将来自第一和第二平衡光电探测器的输出信号分别转换成数字信号; 数字锁相环，用于补偿所接收的光信号的载波信号与本地振荡器光信号之间的相位差，并输出补偿的信号; 以及数据恢复单元，用于从补偿信号中恢复数据。

3. 发明授权

US08655195B2 Average length magnitude detecting apparatus, and method 有权
标题翻译：平均长度检测装置及方法
公开(公告)号：US08655195B2
公开(公告)日：2014-02-18
申请号：US13242732
申请日：2011-09-23
申请人： Weizhen Yan , Zhenning Tao , Lei Li
发明人： Weizhen Yan , Zhenning Tao , Lei Li
IPC分类号： H04B10/00
CPC分类号： H04B10/6162
摘要： The present invention relates to an average length magnitude detecting apparatus and method, and an optical coherent receiver. The average length magnitude detecting method is adopted for detecting whether an average length of an averager used by a polarization crosstalk canceling apparatus in a receiver is long or short, comprising: determining a magnitude of a residual polarization crosstalk coefficient of the receiver; and determining an index that indicates whether the average length of the averager is long or short according to the determined magnitude of the residual polarization crosstalk coefficient.
摘要翻译：本发明涉及平均长度幅度检测装置和方法以及光学相干接收机。采用平均长度幅度检测方法，用于检测接收机中由偏振串扰消除装置使用的平均长度是长或短，包括：确定接收机的残余极化串扰系数的大小; 以及根据确定的剩余极化串扰系数的大小，确定指示平均器的平均长度是长还是短的指标。

4. 发明授权

US08514922B2 Filter coefficient control apparatus and method 有权
标题翻译：滤波系数控制装置及方法
公开(公告)号：US08514922B2
公开(公告)日：2013-08-20
申请号：US12835214
申请日：2010-07-13
申请人： Lei Li , Zhenning Tao , Ling Liu , Shoichiro Oda
发明人： Lei Li , Zhenning Tao , Ling Liu , Shoichiro Oda
IPC分类号： H03H7/30
CPC分类号： H04B10/6165 , H04B10/61
摘要： This invention relates to an apparatus and a method for controlling a filter coefficient. The filter coefficient control apparatus controls a coefficient of a filter of a phase recovering apparatus, and comprises a phase offset obtaining means, for obtaining a phase offset between a carrier and a local oscillation; an autocorrelation calculating means, for calculating an autocorrelation and related statistics of the phase offset; and a filter coefficient determining means, for determining the coefficient of the filter in accordance with the autocorrelation and related statistics.
摘要翻译：本发明涉及一种用于控制滤波器系数的装置和方法。滤波器系数控制装置控制相位恢复装置的滤波器的系数，并且包括用于获得载波和本地振荡之间的相位偏移的相位偏移获取装置; 自相关计算装置，用于计算相位偏移的自相关和相关统计; 以及滤波器系数确定装置，用于根据自相关和相关统计确定滤波器的系数。

5. 发明授权

US08374512B2 Frequency offset monitoring device and optical coherent receiver 有权
公开(公告)号：US08374512B2
公开(公告)日：2013-02-12
申请号：US12219938
申请日：2008-07-30
申请人： Zhenning Tao , Huijian Zhang , Takeshi Hoshida , Lei Li
发明人： Zhenning Tao , Huijian Zhang , Takeshi Hoshida , Lei Li
IPC分类号： H04B10/06 , H04B10/08
CPC分类号： H04B10/6164 , H04B10/61 , H04B10/613 , H04B10/63
摘要： The present invention provides a frequency offset monitoring device and an optical coherent receiver. A low speed frequency offset monitoring device comprises a signal speed lowering section, for lowering the speed of an inputted signal and outputting the speed lowered signal, and a frequency offset monitor, for monitoring frequency offset of the speed lowered signal outputted by the signal speed lowering section.

6. 发明申请

US20120269247A1 MULTI-STAGE PHASE ESTIMATION METHOD AND APPARATUS 有权
标题翻译：多阶段相位估计方法和装置
公开(公告)号：US20120269247A1
公开(公告)日：2012-10-25
申请号：US13446690
申请日：2012-04-13
申请人： Jianqiang Li , Zhenning Tao , Lei Li
发明人： Jianqiang Li , Zhenning Tao , Lei Li
IPC分类号： H04B17/00
CPC分类号： H04L27/0014
摘要： The embodiments provide a multi-stage phase estimation method and apparatus. The apparatus i a multi-stage phase estimation configuration. Each stage of the phase estimation configuration includes metric computation modules. Each of the metric computation modules computing a distance metric and search phase angles according to an input signal and an initial search phase angle or a search phase angle of the former stage phase estimation configuration. The number of the metric computation modules is equal to that of the search phase angles of this stage. A selection module selects the search phase angle corresponding to the minimal distance metric as the phase estimation result output of this stage according to the computation results of all metric computation modules. The average time window length of the former stage phase estimation configuration is larger than that of the subsequent stage phase estimation configuration.
摘要翻译：实施例提供了多级相位估计方法和装置。该装置是多级相位估计配置。相位估计配置的每个阶段包括度量计算模块。每个度量计算模块根据前一级相位估计配置的输入信号和初始搜索相位角或搜索相位角计算距离度量和搜索相位角。度量计算模块的数量等于该阶段的搜索相位角的数量。选择模块根据所有度量计算模块的计算结果，选择与最小距离度量对应的搜索相位角作为该阶段的相位估计结果输出。前级相位估计配置的平均时间窗长度大于后级相位估计配置的平均时间窗长度。

7. 发明申请

US20090129787A1 Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver 有权
标题翻译：光学相干接收机，用于光学相干接收机的频偏估计装置和方法
公开(公告)号：US20090129787A1
公开(公告)日：2009-05-21
申请号：US12289072
申请日：2008-10-20
申请人： Lei Li , Zhenning Tao , Hisao Nakashima
发明人： Lei Li , Zhenning Tao , Hisao Nakashima
IPC分类号： H04B10/06
CPC分类号： H04B10/6164 , H04B10/61 , H04B10/613 , H04B10/6161 , H04B10/6162 , H04B10/6165 , H04B10/63
摘要： The present invention discloses an optical coherent receiver, and a frequency offset estimating apparatus and a frequency offset estimating method for use in the optical coherent receiver. The optical coherent receiver includes a front end processing section for changing an optical signal into a base band digital electric signal. The frequency offset estimating apparatus comprises a phase offset calculating section, for calculating a phase offset in said base band digital electric signal; a phase offset change calculating section, for calculating a change of said phase offset, namely a phase offset change, in accordance with the phase offset calculated by said phase offset calculating section; an ambiguity deciding section, for deciding whether there is ambiguity in said phase offset change calculated by said phase offset change calculating section, and outputting the phase offset change having no ambiguity; and a loop filtering section, for acquiring a weighted average of the phase offset change outputted by said ambiguity deciding section.
摘要翻译：本发明公开了一种光学相干接收机，以及用于光学相干接收机中的频率偏移估计装置和频率偏移估计方法。光相干接收机包括用于将光信号改变为基带数字电信号的前端处理部分。所述频偏估计装置包括：相位偏移计算部，用于计算所述基带数字电信号中的相位偏移; 相位偏移改变计算部分，用于根据由所述相位偏移计算部分计算的相位偏移来计算所述相位偏移的变化，即相位偏移改变; 模糊判定部，用于判定由所述相位偏移变化计算部计算出的所述相位偏移变化是否存在歧义，并输出没有模糊性的相位偏移变化; 以及环路滤波部分，用于获取由所述模糊判定部分输出的相位偏移改变的加权平均值。

8. 发明授权

US08750443B2 Phase error estimator, coherent receiver and phase error estimating method 有权
标题翻译：相位误差估计器，相干接收机和相位误差估计方法
公开(公告)号：US08750443B2
公开(公告)日：2014-06-10
申请号：US12292530
申请日：2008-11-20
申请人： Zhenning Tao , Lei Li , Hisao Nakashima
发明人： Zhenning Tao , Lei Li , Hisao Nakashima
IPC分类号： H04L7/00
CPC分类号： H04B10/69 , H04L27/0002 , H04L27/2273 , H04L2027/003
摘要： The present invention relates to a phase error estimator, a coherent receiver and a phase error estimating method. The phase error estimator estimates a phase error in an inputted base band electric signal and feeds back said phase error; said phase error estimator comprises: a pre-decider, for judging a phase of data in said base band electric signal in accordance with said feedback phase error; a phase error complex value extracting section, for extracting a real part and an imaginary part of the phase error in accordance with the judgment result of said pre-decider; a phase error determining section, for determining said phase error in accordance with the real part and the imaginary part of the phase error extracted by the phase error complex value extracting section; and a time delay feeding back section, for delaying said phase error by N number of symbols and feeding back the delayed phase error to said pre-decider, wherein N is an integer greater than 1.
摘要翻译：本发明涉及相位误差估计器，相干接收机和相位误差估计方法。相位误差估计器估计输入基带电信号中的相位误差并反馈所述相位误差; 所述相位误差估计器包括：预判定器，用于根据所述反馈相位误差来判断所述基带电信号中的数据相位; 相位误差复数值提取部分，用于根据所述预选择器的判断结果提取相位误差的实部和虚部; 相位误差确定部分，用于根据由相位误差复数值提取部分提取的相位误差的实部和虚部来确定所述相位误差; 以及时间延迟反馈部分，用于将所述相位误差延迟N个符号并将所述延迟相位误差反馈到所述预决定器，其中N是大于1的整数。

9. 发明授权

US08189718B2 Adaptive optimization method and apparatus for average length 有权
标题翻译：平均长度的自适应优化方法和装置
公开(公告)号：US08189718B2
公开(公告)日：2012-05-29
申请号：US12495834
申请日：2009-07-01
申请人： Lei Li , Zhenning Tao , Hisao Nakashima
发明人： Lei Li , Zhenning Tao , Hisao Nakashima
IPC分类号： H04L27/00
CPC分类号： H04B10/611 , H04B10/60 , H04B10/6165 , H04B10/697
摘要： The invention provides an average length adaptive optimization method and apparatus. An adaptive optimization method for the average length used for phase recovery comprising: a residual phase difference calculation step, for receiving a current phase of a digital symbol obtained by phase recovery and a data modulation phase of the digital symbol obtained by data recovery, and calculating a residual phase difference of the digital symbol, which is a difference between the current phase and the data modulation phase of the digital symbol; a residual phase difference auto-correlation value calculation step, for calculating an auto-correlation value of the residual phase difference with displacement m, wherein −10≦m≦10, and m is an integral; an optimization step, for optimizing the average length based on the residual phase difference auto-correlation value.
摘要翻译：本发明提供一种平均长度自适应优化方法和装置。一种用于相位恢复的平均长度的自适应优化方法，包括：残差相位差计算步骤，用于接收通过相位恢复获得的数字符号的当前相位和通过数据恢复获得的数字符号的数据调制阶段，以及计算数字符号的剩余相位差，其是数字符号的当前相位和数据调制相位之间的差; 剩余相位差自相关值计算步骤，用于计算残留相位差与位移m的自相关值，其中-10＆lt; nlE; m＆nlE; 10和m是整数; 优化步骤，根据残差相位自相关值优化平均长度。

10. 发明授权

US08078066B2 Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver 有权
标题翻译：光学相干接收机，用于光学相干接收机的频偏估计装置和方法
公开(公告)号：US08078066B2
公开(公告)日：2011-12-13
申请号：US12289072
申请日：2008-10-20
申请人： Lei Li , Zhenning Tao , Hisao Nakashima
发明人： Lei Li , Zhenning Tao , Hisao Nakashima
IPC分类号： H04B10/06
CPC分类号： H04B10/6164 , H04B10/61 , H04B10/613 , H04B10/6161 , H04B10/6162 , H04B10/6165 , H04B10/63
摘要： The present invention discloses an optical coherent receiver, and a frequency offset estimating apparatus and a frequency offset estimating method for use in the optical coherent receiver. The optical coherent receiver includes a front end processing section for changing an optical signal into a base band digital electric signal. The frequency offset estimating apparatus comprises a phase offset calculating section, for calculating a phase offset in said base band digital electric signal; a phase offset change calculating section, for calculating a change of said phase offset, namely a phase offset change, in accordance with the phase offset calculated by said phase offset calculating section; an ambiguity deciding section, for deciding whether there is ambiguity in said phase offset change calculated by said phase offset change calculating section, and outputting the phase offset change having no ambiguity; and a loop filtering section, for acquiring a weighted average of the phase offset change outputted by said ambiguity deciding section.
摘要翻译：本发明公开了一种光学相干接收机，以及用于光学相干接收机中的频率偏移估计装置和频率偏移估计方法。光相干接收机包括用于将光信号改变为基带数字电信号的前端处理部分。所述频偏估计装置包括：相位偏移计算部，用于计算所述基带数字电信号中的相位偏移; 相位偏移改变计算部分，用于根据由所述相位偏移计算部分计算的相位偏移来计算所述相位偏移的变化，即相位偏移改变; 模糊判定部，用于判定由所述相位偏移变化计算部计算出的所述相位偏移变化是否存在歧义，并输出没有模糊性的相位偏移变化; 以及环路滤波部分，用于获取由所述模糊判定部分输出的相位偏移改变的加权平均值。

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