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31. 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。

32. 发明授权

US08532502B2 Filter coefficient adjustment apparatus 有权
标题翻译：滤波系数调整装置
公开(公告)号：US08532502B2
公开(公告)日：2013-09-10
申请号：US12479363
申请日：2009-06-05
申请人： Huijian Zhang , Zhenning Tao , Takahito Tanimura
发明人： Huijian Zhang , Zhenning Tao , Takahito Tanimura
IPC分类号： H04B10/06
CPC分类号： H04B10/6166 , H04B10/61 , H04B10/611 , H04B10/614 , H04J14/06
摘要： In present invention, a filter coefficient adjustment apparatus is used in a polarization demultiplexer which demultiplexes the input signals by using filters to obtain demultiplexed output signals, said filter coefficient adjustment apparatus being used for adjusting the coefficients of the filters, wherein said filter coefficient adjustment apparatus comprises: an logarithm partial derivative calculation unit for calculating the logarithm partial derivative value of a target probability density function of the demultiplexed output signals when its self-variable value is the present demultiplexed output signal value; a gradient calculation unit for calculating the gradient of a target optimizing function for optimizing the distribution of the multiplexed output signals based on the logarithm partial derivative value calculated by the logarithm partial derivative calculation unit; and a filter coefficient updating unit for updating the coefficients of the filters based on the gradient calculated by the gradient calculation unit.
摘要翻译：在本发明中，滤波器系数调整装置用于通过使用滤波器对输入信号进行解复用以获得解复用输出信号的偏振解复用器，所述滤波器系数调整装置用于调整滤波器的系数，其中所述滤波器系数调整装置包括：对数偏导数计算单元，用于当其自变量值为当前解复用的输出信号值时，计算解复用输出信号的目标概率密度函数的对数偏导数值; 梯度计算单元，用于基于由对数偏导数计算单元计算的对数偏导数值来计算用于优化多路复用输出信号的分布的目标优化函数的梯度; 以及滤波器系数更新单元，用于基于由梯度计算单元计算的梯度来更新滤波器的系数。

33. 发明申请

US20130230313A1 METHOD AND APPARATUS FOR COMPENSATING NONLINEAR DAMAGE 有权
标题翻译：用于补偿非线性损伤的方法和装置
公开(公告)号：US20130230313A1
公开(公告)日：2013-09-05
申请号：US13412096
申请日：2012-03-05
申请人： Weizhen YAN , Zhenning Tao , Takeshi Hoshida
发明人： Weizhen YAN , Zhenning Tao , Takeshi Hoshida
IPC分类号： H04B10/18
CPC分类号： H04L25/0202 , H04B10/6971
摘要： The embodiments relate to a method and an apparatus for compensating nonlinear damage. The method and apparatus being used in a dual-polarization communication system, the method comprising: calculating, according to input time-domain signals, a plurality of multiplicative parameters indicative of nonlinear damages to the input signals; constructing a plurality of multiplicators by using the plurality of multiplicative parameters; and compensating the input time-domain signals by using the plurality of multiplicators.
摘要翻译：实施例涉及用于补偿非线性损伤的方法和装置。所述方法和装置用于双极化通信系统中，所述方法包括：根据输入的时域信号，计算指示对所述输入信号的非线性损伤的多个乘法参数; 通过使用所述多个乘法参数构造多个乘法器; 以及通过使用所述多个乘法器来补偿所述输入时域信号。

34. 发明授权

US08331496B2 Phase recovery device, phase recovery method and receiver for 16 QAM data modulation 有权
标题翻译：相位恢复装置，相位恢复方法和接收机，用于16个QAM数据调制
公开(公告)号：US08331496B2
公开(公告)日：2012-12-11
申请号：US12896476
申请日：2010-10-01
申请人： Meng Yan , Zhenning Tao , Shoichiro Oda
发明人： Meng Yan , Zhenning Tao , Shoichiro Oda
IPC分类号： H04L27/00
CPC分类号： H04L27/3827 , H04L2027/0046 , H04L2027/0067
摘要： The present invention relates to a phase recovery device, phase recovery method and receiver for 16 QAM data modulation. The phase recovery device comprises: a fourth power calculator for calculating fourth power values of respective symbols in a symbol block; a classification unit for classifying respective symbols in the symbol block based on amplitudes, so as to classify respective symbols in the symbol block into a first category having a large or small amplitude, and a second category having an intermediate amplitude; a reference point determination unit for determining a reference point based on categories of respective symbols in the symbol block and their fourth power values; a rotation unit for rotating respective symbols in the symbol block undergone the fourth power operations and being classified into the second category, based on the reference point; and a phase estimation unit for performing phase estimations based on respective symbols in the symbol block undergone the fourth power operations and being classified into the first category, and respective rotated symbols in the symbol block undergone the fourth power operations and being classified into the second category.
摘要翻译：本发明涉及用于16QAM数据调制的相位恢复装置，相位恢复方法和接收机。相位恢复装置包括：第四功率计算器，用于计算符号块中各符号的第四功率值; 分类单元，用于基于幅度对符号块中的各个符号进行分类，以将符号块中的各个符号分类为具有大或小幅度的第一类别和具有中间幅度的第二类别; 参考点确定单元，用于基于符号块中的各个符号的类别及其第四功率值来确定参考点; 旋转单元，用于旋转经过第四功率操作的符号块中的各个符号，并且基于参考点将其分类为第二类别; 以及相位估计单元，用于基于经过第四功率操作的符号块中的各个符号执行相位估计，并将其分类为第一类别，以及经过第四功率操作的符号块中的各个旋转符号，并被分类为第二类别。

35. 发明申请

US20120290244A1 METHOD AND APPARATUS FOR COMPENSATING NONLINEAR DAMAGE 有权
标题翻译：用于补偿非线性损伤的方法和装置
公开(公告)号：US20120290244A1
公开(公告)日：2012-11-15
申请号：US13412176
申请日：2012-03-05
申请人： Weizhen YAN , Zhenning Tao , Takeshi Hoshida
发明人： Weizhen YAN , Zhenning Tao , Takeshi Hoshida
IPC分类号： G01D18/00 , G06F19/00
CPC分类号： H04B10/255 , H04B10/6971
摘要： A method and apparatus for compensating nonlinear damage are disclosed. The method for compensating nonlinear damage, including: determining an additive parameter indicating an amount of nonlinear damage based on a plurality of sampled signal sets among which a sampling time of an input signal varies according to different time; and subtracting the additive parameter from the input signal.
摘要翻译：公开了一种用于补偿非线性损伤的方法和装置。一种用于补偿非线性损伤的方法，包括：基于多个采样信号集确定表示非线性损伤量的附加参数，其中输入信号的采样时间根据不同的时间而变化; 并从输入信号中减去加法参数。

36. 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。

37. 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。

38. 发明申请

US20110286741A1 APPARATUS AND METHOD FOR MONITORING STATISTICAL CHARACTERISTICS OF PHASE NOISES, AND COHERENT OPTICAL COMMUNICATION RECEIVER 有权
标题翻译：用于监测相位噪声统计特性的装置和方法以及相关光通信接收机
公开(公告)号：US20110286741A1
公开(公告)日：2011-11-24
申请号：US13058262
申请日：2008-11-28
申请人： Weizhen Yan , Zhenning Tao , Shoichiro Oda
发明人： Weizhen Yan , Zhenning Tao , Shoichiro Oda
IPC分类号： H04B10/08
CPC分类号： H04J14/02 , H04B10/60 , H04B10/611 , H04B10/6163
摘要： This invention relates to an apparatus and a method for monitoring statistical characteristics of phase noises, as well as to a coherent optical communication receiver. The apparatus for monitoring statistical characteristics of phase noises comprises an argument calculating unit (203), for obtaining an argument of a signal input thereto; an unwrapping unit (204), for unwrapping the argument obtained by the argument calculating unit (203) to obtain a phase signal (205); a delaying unit (207), for delaying the phase signal; a differentiating unit (209), for obtaining a difference between a phase signal currently obtained by the unwrapping unit (204) and a phase signal delayed by the delaying unit (207); a modulus squaring unit (210), for obtaining a square of the modulus of the difference; and an averaging unit (211), for averaging squares of moduli of a plurality of differences obtained by the modulus squaring unit (210) to obtain a mean-squared differential phase (MSDP) value.
摘要翻译：本发明涉及用于监测相位噪声的统计特性以及相干光通信接收机的装置和方法。用于监视相位噪声的统计特性的装置包括：一个参数计算单元，用于获得输入到其中的信号的自变量; 一个展开单元（204），用于展开由参数计算单元（203）获得的参数以获得相位信号（205）; 延迟单元（207），用于延迟所述相位信号; 差分单元（209），用于获得由解包单元（204）当前获得的相位信号与由延迟单元（207）延迟的相位信号之间的差; 模数平方单元（210），用于获得所述差的模数的平方; 以及平均单元（211），用于对通过所述模量平方单元（210）获得的多个差的模量的平均值进行平均，以获得平均差分相位（MSDP）值。

39. 发明申请

US20100003028A1 FILTER COEFFICIENT ADJUSTMENT APPARATUS 有权
标题翻译：过滤器系数调整装置
公开(公告)号：US20100003028A1
公开(公告)日：2010-01-07
申请号：US12479363
申请日：2009-06-05
申请人： Huijian ZHANG , Zhenning Tao , Takahito Tanimura
发明人： Huijian ZHANG , Zhenning Tao , Takahito Tanimura
IPC分类号： H04J14/06
CPC分类号： H04B10/6166 , H04B10/61 , H04B10/611 , H04B10/614 , H04J14/06
摘要： In present invention, a filter coefficient adjustment apparatus is used in a polarization demultiplexer which demultiplexes the input signals by using filters to obtain demultiplexed output signals, said filter coefficient adjustment apparatus being used for adjusting the coefficients of the filters, wherein said filter coefficient adjustment apparatus comprises: an logarithm partial derivative calculation unit for calculating the logarithm partial derivative value of a target probability density function of the demultiplexed output signals when its self-variable value is the present demultiplexed output signal value; a gradient calculation unit for calculating the gradient of a target optimizing function for optimizing the distribution of the multiplexed output signals based on the logarithm partial derivative value calculated by the logarithm partial derivative calculation unit; and a filter coefficient updating unit for updating the coefficients of the filters based on the gradient calculated by the gradient calculation unit.
摘要翻译：在本发明中，滤波器系数调整装置用于通过使用滤波器对输入信号进行解复用以获得解复用输出信号的偏振解复用器，所述滤波器系数调整装置用于调整滤波器的系数，其中所述滤波器系数调整装置包括：对数偏导数计算单元，用于当其自变量值为当前解复用的输出信号值时，计算解复用输出信号的目标概率密度函数的对数偏导数值; 梯度计算单元，用于基于由对数偏导数计算单元计算的对数偏导数值来计算用于优化多路复用输出信号的分布的目标优化函数的梯度; 以及滤波器系数更新单元，用于基于由梯度计算单元计算的梯度来更新滤波器的系数。

40. 发明授权

US08886056B2 Apparatus for self-phase modulation noise calculation, apparatus for self-phase modulation noise elimination and optical coherent receiver 有权
标题翻译：用于自相位调制噪声计算的装置，用于自相位调制噪声消除的装置和光学相干接收机
公开(公告)号：US08886056B2
公开(公告)日：2014-11-11
申请号：US13221312
申请日：2011-08-30
申请人： Lei Li , Zhenning Tao , Takeshi Hoshida
发明人： Lei Li , Zhenning Tao , Takeshi Hoshida
IPC分类号： H04B10/00 , H04B10/255 , H04B10/61 , H04B10/079
CPC分类号： H04B10/0795 , H04B10/255 , H04B10/6163
摘要： The present invention provides apparatus for self-phase modulation noise calculation, apparatus for self-phase modulation noise elimination and optical coherent receiver. The apparatus for calculation comprises: a signal receiver to receive an input signal; a calculator connected to the signal receiver to calculate a self-phase modulation noise at the current instant by using the signal powers of an input signal waveform at the current instant and at several sampling instants adjacent to the current instant. The embodiments of the present invention calculates the self-phase modulation noise at a certain instant by using the signal powers at a plurality of digital sampling periods before and after this instant, and when the apparatus is used to calculate the self-phase modulation noise of each of the sub-spans in an optical fiber transmission link, in case that the calculation precision is ensured, the granularity of the sub-spans may be reduced, thereby lowering the complexity of the calculation.
摘要翻译：本发明提供了用于自相位调制噪声计算的装置，用于自相位调制噪声消除的装置和光学相干接收机。该计算装置包括：接收输入信号的信号接收器; 连接到信号接收器的计算器，通过使用当前时刻的输入信号波形的信号功率和与当前时刻相邻的几个采样时刻来计算当前时刻的自相位调制噪声。本发明的实施例通过在该时刻之前和之后的多个数字采样周期中使用信号功率来计算某一时刻的自相位调制噪声，并且当该装置用于计算自相位调制噪声的自相位调制噪声在光纤传输链路中的每个子跨度，在确保计算精度的情况下，可能减小子跨度的粒度，从而降低计算的复杂度。

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