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。

公开(公告)号：US20090142076A1

公开(公告)日：2009-06-04

申请号：US12285234

申请日：2008-09-30

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： H04B10/6165 ,  H04B10/61 ,  H04B10/613

摘要： The present invention relates to a frequency offset compensating apparatus and method, and an optical coherent receiver. The optical coherent receiver includes a front end processor and a frequency offset estimator, of which said front end processor converts an inputted optical signal into a base band digital electric signal, and said frequency offset estimator estimates a phase offset change introduced by a frequency offset in said base band digital electric signal; said frequency offset compensating apparatus comprises an M output integrator, for integrating the phase offset change introduced by the frequency offset to acquire M inverse numbers of the phase offset introduced by the frequency offset, where M is an integer greater than 1; a series-parallel converting device, for dividing said base band digital electric signal into M sub base band digital electric signals; M complex multipliers, for constructing the corresponding inverse numbers in the M inverse numbers to be complex numbers, and multiplying them with the corresponding sub base band digital electric signals in the M sub base band digital electric signals; and a parallel-series converting device, for converting the M sub base band digital electric signals multiplied by said complex multipliers into a base band electric signal.

摘要翻译： 本发明涉及一种频偏补偿装置和方法以及光相干接收机。 所述光学相干接收机包括前端处理器和频率偏移估计器，其中所述前端处理器将输入的光信号转换为基带数字电信号，并且所述频偏估计器估计由频带偏移引入的相位偏移变化 表示基带数字电信号; 所述频率偏移补偿装置包括M输出积分器，用于对由频率偏移引入的相位偏移变化进行积分，以获得由频率偏移引入的相位偏移的M个数，其中M是大于1的整数; 串并联转换装置，用于将所述基带数字电信号分成M个子基带数字电信号; M个复数乘法器，用于将M个倒数中的对应的倒数构成为复数，并将其与M个子基带数字电信号中的对应的子基带数字电信号相乘; 以及并行串行转换装置，用于将乘以所述复数乘法器的M个子基带数字电信号转换成基带电信号。

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。

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。

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。

公开(公告)号：US08571407B2

公开(公告)日：2013-10-29

申请号：US12567245

申请日：2009-09-25

申请人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

发明人： Lei Li ,  Zhenning Tao ,  Hisao Nakashima

IPC分类号： H04B10/08 ,  H04B17/00

CPC分类号： H04B10/611 ,  H04B10/0795 ,  H04B10/60

摘要： The present invention relates to an optical coherent receiver and an apparatus for and a method of monitoring performance thereof. The apparatus for monitoring performance of the optical coherent receiver makes use of a first signal and a second signal from the optical coherent receiver to monitor performance of the optical coherent receiver, and comprises a first subtracter, for subtracting the second signal from the first signal to obtain a first subtraction result; a squarer, for obtaining a square of the first subtraction result; a delayer, for delaying the first subtraction result; a multiplier, for multiplying the first subtraction result with the delayed first subtraction result; and a second subtracter, for subtracting the result of the multiplier from the result of the squarer.

摘要翻译： 本发明涉及一种光学相干接收机及其监视性能的装置和方法。 用于监视光学相干接收机的性能的装置利用来自光学相干接收机的第一信号和第二信号来监测光学相干接收机的性能，并且包括第一减法器，用于从第一信号减去第二信号 获得第一个减法结果; 平方，用于获得第一减法结果的平方; 延迟器，用于延迟第一减法结果; 乘法器，用于将第一减法结果与延迟的第一减法结果相乘; 和第二减法器，用于从平方器的结果中减去乘数的结果。

公开(公告)号：US08103177B2

公开(公告)日：2012-01-24

申请号：US12320740

申请日：2009-02-03

申请人： Huijian Zhang ,  Lei Li ,  Zhenning Tao ,  Hisao Nakashima

发明人： Huijian Zhang ,  Lei Li ,  Zhenning Tao ,  Hisao Nakashima

IPC分类号： H04B10/06

CPC分类号： H04B10/6161 ,  H04B10/61 ,  H04B10/6164 ,  H04B10/63

摘要： The present invention discloses a frequency offset detecting apparatus and method for use in a digital coherent optical receiver. The digital coherent optical receiver comprises: a front-end processing section for generating a digital baseband electric signal; an equalizer for performing equalized filtering on the digital baseband electric signal; and the frequency offset detecting apparatus for detecting frequency offset contained in the digital baseband electric signal or frequency offset contained in a signal outputted by the equalizer; wherein the frequency offset detecting apparatus comprises an argument difference obtaining unit, a first subtracter, a second subtracter, a quantizer and an averager, of which the argument difference obtaining unit obtains an argument difference of adjacent symbols in a signal inputted therein; the first subtracter subtracts an output of the averager from the argument difference obtained by the argument difference obtaining unit; the quantizer performs uniform quantization with predetermined intervals on an output of the first subtracter; the second subtracter subtracts an output of the quantizer from the argument difference obtained by the argument difference obtaining unit; and the averager averages an output of the second subtracter.

摘要翻译： 本发明公开了一种在数字相干光接收机中使用的频偏检测装置和方法。 数字相干光接收机包括：前端处理部分，用于产生数字基带电信号; 均衡器，用于对数字基带电信号进行均衡滤波; 以及频率偏移检测装置，用于检测包含在由均衡器输出的信号中的数字基带电信号或频率偏移中的频率偏移; 其中，所述频偏检测装置包括自变量差分获取单元，第一减法器，第二减法器，量化器和平均器，其中所述变差差获取单元获取其中输入的信号中的相邻符号的自变量差; 所述第一减法器从由所述变元差分获取单元获得的自变量差中减去所述平均器的输出; 量化器在第一减法器的输出上以预定间隔执行均匀量化; 所述第二减法器根据由所述自变量差获取单元获得的参数差减去所述量化器的输出; 并且平均器对第二减法器的输出进行平均。

公开(公告)号：US08103176B2

公开(公告)日：2012-01-24

申请号：US12285234

申请日：2008-09-30

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： H04B10/6165 ,  H04B10/61 ,  H04B10/613

摘要： The present invention relates to a frequency offset compensating apparatus and method, and an optical coherent receiver. The optical coherent receiver includes a front end processor and a frequency offset estimator, of which said front end processor converts an inputted optical signal into a base band digital electric signal, and said frequency offset estimator estimates a phase offset change introduced by a frequency offset in said base band digital electric signal; said frequency offset compensating apparatus comprises an M output integrator, for integrating the phase offset change introduced by the frequency offset to acquire M inverse numbers of the phase offset introduced by the frequency offset, where M is an integer greater than 1; a series-parallel converting device, for dividing said base band digital electric signal into M sub base band digital electric signals; M complex multipliers, for constructing the corresponding inverse numbers in the M inverse numbers to be complex numbers, and multiplying them with the corresponding sub base band digital electric signals in the M sub base band digital electric signals; and a parallel-series converting device, for converting the M sub base band digital electric signals multiplied by said complex multipliers into a base band electric signal.

摘要翻译： 本发明涉及一种频偏补偿装置和方法以及光相干接收机。 所述光学相干接收机包括前端处理器和频率偏移估计器，其中所述前端处理器将输入的光信号转换为基带数字电信号，并且所述频偏估计器估计由频带偏移引入的相位偏移变化 表示基带数字电信号; 所述频率偏移补偿装置包括M输出积分器，用于对由频率偏移引入的相位偏移变化进行积分，以获取由频率偏移引入的相位偏移的M个数，其中M是大于1的整数; 串并联转换装置，用于将所述基带数字电信号分成M个子基带数字电信号; M个复数乘法器，用于将M个倒数中的对应的倒数构成为复数，并将其与M个子基带数字电信号中的对应的子基带数字电信号相乘; 以及并行串行转换装置，用于将乘以所述复数乘法器的M个子基带数字电信号转换成基带电信号。

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。

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。