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。

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：US08675470B2

公开(公告)日：2014-03-18

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： H04J1/12

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：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：US08798477B2

公开(公告)日：2014-08-05

申请号：US12623009

申请日：2009-11-20

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/12 ,  H04B10/00

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：US08787437B2

公开(公告)日：2014-07-22

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

CPC分类号： H04L25/03057

摘要： An adaptive equalizer and an adaptive equalizing method are provided. The adaptive equalizer includes 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 and a monitoring device, for controlling on or off of the switching unit in accordance with the fact that a down sampling phase of the inputted signal or a down sampling phase of the equalized signal is within a predetermined range. 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.

摘要翻译： 提供了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，用于自适应地均衡输入的信号以输出均衡的信号; 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和监视设备，用于根据以下事实控制开关单元的接通或关断：输入信号的下采样相位或下采样相位 均衡信号在预定范围内。 当切换单元打开时，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。

公开(公告)号：US08086114B2

公开(公告)日：2011-12-27

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：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：US08744276B2

公开(公告)日：2014-06-03

申请号：US12408176

申请日：2009-03-20

申请人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

发明人： Hisao Nakashima ,  Takeshi Hoshida ,  Takahito Tanimura ,  Lei Li ,  Ling Liu

IPC分类号： H04B10/00

CPC分类号： H04B10/6165 ,  H04B10/61 ,  H04B10/611 ,  H04L7/0054 ,  H04L27/223

摘要： An optical receiving apparatus includes a combining unit that combines signal light and reference light; a optoelectric converting unit that converts, into electrical signals, two or more optical signals that enable reconstruction of a complex electric field signal of the signal light obtained by the combining unit; and a sampling clock generating unit that generates a sampling clock that has a frequency preset based on a symbol rate of the signal light and is asynchronous with the signal light. The optical receiving apparatus further includes a digital converting unit that samples at the frequency of the sampling clock signal, an electrical signal obtained by the optoelectric converting unit and converts the electrical signal into a digital signal; and a digital signal processing unit that demodulates a received signal based on a complex digital signal obtained from the digital signal obtained by the digital converting unit.

摘要翻译： 光接收装置包括组合信号光和参考光的组合单元; 光电转换单元，其将电信号转换成能够重构由组合单元获得的信号光的复电场信号的两个或更多个光信号; 以及采样时钟产生单元，其生成具有基于信号光的符号率预设的频率并且与信号光异步的采样时钟。 光接收装置还包括数字转换单元，以采样时钟信号的频率采样，由光电转换单元获得的电信号，并将该电信号转换为数字信号; 以及数字信号处理单元，其基于从由数字转换单元获得的数字信号获得的复数数字信号来解调接收信号。