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：US08762086B2

公开(公告)日：2014-06-24

申请号：US12232179

申请日：2008-09-11

申请人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

发明人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

IPC分类号： G01R13/00

CPC分类号： H04L27/3863 ,  H04L27/3872

摘要： The present invention discloses a phase imbalance monitoring apparatus, an amplitude imbalance monitoring apparatus, as well as an apparatus incorporating the same. The phase imbalance monitoring apparatus is for use in an apparatus in which imbalance between an I branch signal and a Q branch signal in quadrature to each other is required to be monitored, and is characterized in comprising a preprocessing unit, for performing preprocessing on the I branch signal and the Q branch signal to extract essential information relevant to correlation of the signals; and a correlation unit, for performing correlation processing on the extracted essential information to learn of the phase imbalance between the I branch signal and the Q branch signal.

摘要翻译： 本发明公开了一种相位不平衡监视装置，振幅不平衡监视装置，以及包括该不平衡监视装置的装置。 相位不平衡监视装置用于需要监视I分支信号和彼此正交的Q分支信号之间的不平衡的装置，其特征在于包括预处理单元，用于对I进行预处理 分支信号和Q分支信号，以提取与信号相关性相关的基本信息; 以及相关单元，用于对所提取的基本信息执行相关处理，以了解I分支信号和Q分支信号之间的相位不平衡。

公开(公告)号：US20090119043A1

公开(公告)日：2009-05-07

申请号：US12232179

申请日：2008-09-11

申请人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

发明人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

IPC分类号： G01R13/00

CPC分类号： H04L27/3863 ,  H04L27/3872

摘要： The present invention discloses a phase imbalance monitoring apparatus, an amplitude imbalance monitoring apparatus, as well as an apparatus incorporating the same. The phase imbalance monitoring apparatus is for use in an apparatus in which imbalance between an I branch signal and a Q branch signal in quadrature to each other is required to be monitored, and is characterized in comprising a preprocessing unit, for performing preprocessing on the I branch signal and the Q branch signal to extract essential information relevant to correlation of the signals; and a correlation unit, for performing correlation processing on the extracted essential information to learn of the phase imbalance between the I branch signal and the Q branch signal.

摘要翻译： 本发明公开了一种相位不平衡监视装置，振幅不平衡监视装置，以及包括该不平衡监视装置的装置。 相位不平衡监视装置用于需要监视I分支信号和彼此正交的Q分支信号之间的不平衡的装置，其特征在于包括预处理单元，用于对I进行预处理 分支信号和Q分支信号，以提取与信号相关性相关的基本信息; 以及相关单元，用于对所提取的基本信息执行相关处理，以了解I分支信号和Q分支信号之间的相位不平衡。

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.

公开(公告)号：US20090080906A1

公开(公告)日：2009-03-26

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.

摘要翻译： 本发明提供一种频偏监测装置和光相干接收机。 低速频率偏移监视装置包括信号降低部分，用于降低输入信号的速度并输出降速信号;以及频率偏移监视器，用于监视由信号速度降低输出的降速信号的频率偏移 部分。

公开(公告)号：US20100002810A1

公开(公告)日：2010-01-07

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： H04L27/227

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 <= m <= 10，m是积分; 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：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。