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：US20120275797A1

公开(公告)日：2012-11-01

申请号：US13458773

申请日：2012-04-27

申请人： Lei Li ,  Zhenning Tao ,  Shoichiro Oda

发明人： Lei Li ,  Zhenning Tao ,  Shoichiro Oda

IPC分类号： H04B10/00 ,  H04B15/00

CPC分类号： H04B10/66 ,  H04B10/2519 ,  H04J14/06

摘要： Polarization scattering compensation device and method are disclosed. In the device, a time sequence alignment unit aligns time sequences of signals in the first and second polarization state transmitted simultaneously; a polarization scattering estimation unit estimates a scattering coefficient of a scattering by the signal in the first polarization state on the signal in the second polarization state, and a scattering coefficient of a scattering by the signal in the second polarization state on the signal in the first polarization state; and a polarization scattering removal unit removes the scattering by the signal in the first polarization state on the signal in the second polarization state, and the scattering by the signal in the second polarization state on the signal in the first polarization state, in accordance with the scattering coefficients.

摘要翻译： 公开了极化散射补偿装置和方法。 在该装置中，时间序列对准单元对准同时传输的第一和第二极化状态的信号的时间序列; 偏振散射估计单元通过第一偏振态的信号对第二偏振态的信号和第二偏振态中的信号的散射散射系数估计第一偏振态的信号的散射散射系数 极化状态; 并且偏振散射去除单元根据第二偏振状态的信号和第一偏振态的信号在第一偏振态的信号上的第一偏振态的信号的散射，根据第 散射系数。

公开(公告)号：US20110243575A1

公开(公告)日：2011-10-06

申请号：US12906560

申请日：2010-10-18

申请人： Meng YAN ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

发明人： Meng YAN ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

IPC分类号： H04B10/06 ,  H03H7/30

CPC分类号： H04L25/0305 ,  H04L2025/03401 ,  H04L2025/03675

摘要： The present application discloses a method for adaptive blind equalization of a PSK signal, an equalizer and a receiver. According to embodiments as provided, a conjugate product of a current output and a precedent output of an FIR filter is calculated, an equalization coefficient is updated using the conjugate product, and then an input signal is filtered using the FIR filter with the updated equalization coefficient. The embodiments as provided is applicable to adaptive blind equalization of any phase shift keying signal including a BPSK signal.

摘要翻译： 本申请公开了一种用于PSK信号，均衡器和接收机的自适应盲均衡的方法。 根据提供的实施例，计算FIR滤波器的电流输出和先前输出的共轭乘积，使用共轭乘积来更新均衡系数，然后使用具有更新的均衡系数的FIR滤波器对输入信号进行滤波 。 所提供的实施例可应用于包括BPSK信号的任何相移键控信号的自适应盲均衡。

公开(公告)号：US20110142455A1

公开(公告)日：2011-06-16

申请号：US12956507

申请日：2010-11-30

申请人： Ling Liu ,  Zhenning Tao ,  Shoichiro Oda

发明人： Ling Liu ,  Zhenning Tao ,  Shoichiro Oda

IPC分类号： H04B10/00

CPC分类号： H04B10/0795

摘要： This invention relates to crosstalk coefficient estimating apparatus and crosstalk coefficient estimating method. The crosstalk coefficient estimating apparatus is used to estimate a crosstalk coefficient of crosstalk inflicted on one channel of an optical fiber transmission system comprising two or more channels. The crosstalk coefficient estimating apparatus comprises a complex conjugate unit, for obtaining a complex conjugate signal for signal in one polarization-state of another channel other than said one channel; a multiplying unit, for multiplying the complex conjugate signal obtained by the complex conjugate unit with signal in another polarization-state of the another channel; and a filter, for filtering the multiplication result of the multiplying unit to obtain a crosstalk coefficient of crosstalk inflicted on the signal in one polarization-state of said one channel, wherein a transmission function of the filter is set according to system parameters of the optical fiber transmission system.

摘要翻译： 本发明涉及串扰系数估计装置和串扰系数估计方法。 串扰系数估计装置用于估计包含两个或更多个信道的光纤传输系统的一个信道上产生的串扰串扰系数。 串扰系数估计装置包括复共轭单元，用于获得用于除了所述一个信道之外的另一信道的一个极化状态的信号的复共轭信号; 乘法单元，用于将由复共轭单元获得的复共轭信号与另一信道的另一极化状态中的信号相乘; 以及滤波器，用于对乘法单元的相乘结果进行滤波，以获得对所述一个信道的一个极化状态的信号产生的串扰的串扰系数，其中根据光学系统参数设置滤波器的传输函数 光纤传输系统。

公开(公告)号：US20110064169A1

公开(公告)日：2011-03-17

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： H04L27/06

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。

公开(公告)号：US20100142946A1

公开(公告)日：2010-06-10

申请号：US12623009

申请日：2009-11-20

申请人： Ling LIU ,  Zhenning Tao ,  Takahiro Tanimura

发明人： Ling LIU ,  Zhenning Tao ,  Takahiro Tanimura

IPC分类号： H04B10/08

CPC分类号： H04B10/07951 ,  H04B10/25133

摘要： The present invention relates to chromatic dispersion monitor and method, chromatic dispersion compensator. The chromatic dispersion monitor is used for estimating a chromatic dispersion in accordance with a chromatic dispersion correlation amount sequence, comprising: a phase differential unit, for obtaining a phase difference sequence by performing a phase differential calculation in accordance with the chromatic dispersion correlation amount sequence; a phase difference differential unit, for obtaining a phase difference differential sequence by performing a phase difference differential operation; and a chromatic dispersion estimating unit, for estimating the chromatic dispersion in accordance with the phase difference differential sequence obtained by the phase difference differential unit.

摘要翻译： 本发明涉及色散监视器和方法，色散补偿器。 色散监视器用于根据色散相关量序列估计色散，包括：相位差单元，用于通过根据色散相关量序列执行相位差计算来获得相位差序列; 相位差差分单元，用于通过执行相位差差分运算来获得相位差差分序列; 以及色散估计单元，用于根据由相位差差分单元获得的相位差差分序列来估计色散。

公开(公告)号：US20090304064A1

公开(公告)日：2009-12-10

申请号：US12479268

申请日：2009-06-05

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H03H7/30 ,  H03H7/40

CPC分类号： H04L25/03057

摘要： The present invention relates to an adaptive equalizer and an adaptive equalizing method. The adaptive equalizer comprises an adaptive equalizing unit, for adaptively equalizing an inputted signal to output the equalized signal; a coefficient updating unit, for updating a coefficient of a filter of the adaptive equalizing unit; a switching unit, connected between the coefficient updating unit and the adaptive equalizing unit, wherein when the switching unit is on, the coefficient updating unit is capable of updating the coefficient of the adaptive equalizing unit, and when the switching unit is off, the coefficient updating unit is incapable of updating the coefficient of the adaptive equalizing unit; and a monitoring device, for controlling on or off of the switching unit in accordance with a down sampling phase of the inputted signal or a down sampling phase of the equalized signal.

摘要翻译： 本发明涉及自适应均衡器和自适应均衡方法。 自适应均衡器包括自适应均衡单元，用于自适应均衡输入信号以输出均衡信号; 系数更新单元，用于更新自适应均衡单元的滤波器的系数; 连接在系数更新单元和自适应均衡单元之间的切换单元，其中当切换单元接通时，系数更新单元能够更新自适应均衡单元的系数，并且当切换单元关闭时，系数 更新单元不能更新自适应均衡单元的系数; 以及监视装置，用于根据输入信号的下采样相位或均衡信号的下采样相位来控制开关单元的接通或关断。

公开(公告)号：US20090245816A1

公开(公告)日：2009-10-01

申请号：US12320793

申请日：2009-02-04

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/06

CPC分类号： H04B10/6971 ,  H04B10/60 ,  H04B10/611 ,  H04B10/616

摘要： The present invention discloses filter coefficient changing apparatus and method for use in a dual-polarized optical coherent receiver. The apparatus comprises a controlling unit, a switching unit and a new coefficient obtaining unit. The switching unit is connected between a first filter coefficient updating unit and a first filtering unit and a second filtering unit; the new coefficient obtaining unit generates new filter coefficients for the first filtering unit and the second filtering unit in accordance with filter coefficients outputted by a second filter coefficient updating unit; and the controlling unit generates a control signal that controls switching of the switching unit. Upon reception of the control signal, the switching unit breaks off output of the filter coefficients from the first filter coefficient updating unit, transmits new filter coefficients from the new coefficient obtaining unit to the first filtering unit and the second filtering unit, and subsequently resumes the output of the filter coefficients from the first filter coefficient updating unit to the first filtering unit and the second filtering unit.

摘要翻译： 本发明公开了一种在双偏振光学相干接收机中使用的滤波器系数改变装置和方法。 该装置包括控制单元，切换单元和新系数获取单元。 切换单元连接在第一滤波器系数更新单元和第一滤波单元与第二滤波单元之间; 新系数获取单元根据由第二滤波器系数更新单元输出的滤波系数，生成用于第一滤波单元和第二滤波单元的新滤波器系数; 并且所述控制单元产生控制所述切换单元的切换的控制信号。 在接收到控制信号时，切换单元从第一滤波器系数更新单元中断滤波器系数的输出，将新的滤波器系数从新系数获取单元发送到第一滤波单元和第二滤波单元，随后恢复 将滤波器系数从第一滤波器系数更新单元输出到第一滤波单元和第二滤波单元。

公开(公告)号：US20090141831A1

公开(公告)日：2009-06-04

申请号：US12292530

申请日：2008-11-20

申请人： Zhenning Tao ,  Lei Ll ,  Hisao Nakashima

发明人： Zhenning Tao ,  Lei Ll ,  Hisao Nakashima

IPC分类号： H04L27/00

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，并将延迟的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：US20070230617A1

公开(公告)日：2007-10-04

申请号：US11723938

申请日：2007-03-22

申请人： Zhenning Tao ,  Jens Rasmussen

发明人： Zhenning Tao ,  Jens Rasmussen

IPC分类号： H04L27/12

CPC分类号： H04L27/364 ,  G02F1/0123 ,  G02F1/2255 ,  H04B10/5561

摘要： An apparatus and a method for a I-Q quadrature modulation transmitter monitor a phase bias between an I branch and a Q branch of the I-Q quadrature modulation transmitter. The I-Q quadrature modulation transmitter includes the I-branch, the Q-branch equipped with a phase bias, and a tap. The apparatus is installed between the tap and the phase bias, and monitors the phase between the I branch and the Q branch which phase is introduced by the phase bias. The apparatus includes the following components: a module squarer, receiving signal from the tap and outputting a module square of the received signal; a multiplier, to multiplying data of the I-branch, data of the Q-branch and the module square to output a multiplied signal; and an averager, averaging the multiplied signal output by the multiplier. The phase between the I branch and the Q branch may be corrected according to monitoring results.

摘要翻译： 用于I-Q正交调制发射机的装置和方法监视I-Q正交调制发射机的I分支和Q分支之间的相位偏置。 I-Q正交调制发射机包括I分支，配备有相位偏置的Q分支和抽头。 该装置安装在抽头和相位偏置之间，并监视I相和Q分支之间的相位，该相位由相位偏置引入。 该装置包括以下组件：模块平方器，从抽头接收信号并输出​​接收信号的平方; 乘法器，用于将I分支的数据，Q分支的数据和模块平方相乘以输出相乘的信号; 和平均器，对乘法器输出的相乘信号进行平均。 I分支和Q分支之间的相位可以根据监测结果进行校正。