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1. 发明授权

US07970290B2 Digital phase estimator, digital phase locked loop and optical coherent receiver 有权
标题翻译：数字相位估计器，数字锁相环和光相干接收机
公开(公告)号：US07970290B2
公开(公告)日：2011-06-28
申请号：US12026782
申请日：2008-02-06
申请人： Zhenning Tao , Lei Li , Jens C. Rasmussen
发明人： Zhenning Tao , Lei Li , Jens C. Rasmussen
IPC分类号： H04B10/06 , H04B10/08
CPC分类号： H04B10/6165 , H04B10/61 , H04B10/611 , H04B10/613
摘要： The present invention provides a digital phase estimator, a digital phase locked loop and an optical coherent receiver. The optical coherent receiver comprises a local oscillator laser, for supplying a local oscillator optical signal; an optical 90 degree frequency mixer, for mixing a received optical signal with the local oscillator optical signal; first and second balancing photoelectric detectors, for converting the optical signals outputted from the optical 90 degree frequency mixer into baseband electrical signals; first and second A/D converters, for respectively converting output signals from the first and the second balancing photoelectric detectors into digital signals; a digital phase locked loop, for compensating a phase difference between a carrier signal of the received optical signal and the local oscillator optical signal, and outputting the compensated signal; and a data recovering unit, for recovering data from the compensated signal.
摘要翻译：本发明提供数字相位估计器，数字锁相环和光学相干接收器。光学相干接收器包括用于提供本地振荡器光信号的本地振荡器激光器; 用于将接收到的光信号与本地振荡器光信号混合的光学90度混频器; 第一和第二平衡光电检测器，用于将从光学90度混频器输出的光信号转换成基带电信号; 第一和第二A / D转换器，用于将来自第一和第二平衡光电探测器的输出信号分别转换成数字信号; 数字锁相环，用于补偿所接收的光信号的载波信号与本地振荡器光信号之间的相位差，并输出补偿的信号; 以及数据恢复单元，用于从补偿信号中恢复数据。

2. 发明申请

US20080056733A1 Phase monitor used in optical receiver 失效
标题翻译：相位监视器用于光接收机
公开(公告)号：US20080056733A1
公开(公告)日：2008-03-06
申请号：US11605370
申请日：2006-11-29
申请人： Akihiko Isomura , Jens C. Rasmussen , Zhenning Tao , Noriaki Mizuguchi , Kenichi Kaburagi
发明人： Akihiko Isomura , Jens C. Rasmussen , Zhenning Tao , Noriaki Mizuguchi , Kenichi Kaburagi
IPC分类号： H04B10/06
CPC分类号： H04B10/677
摘要： Branches are grouped into a group 1 including first and second branches, and a group 2 including third and fourth branches. The signal after being passed through a dual pin photodiode in one branch included in the group 1 and being at the earlier stage of a CDR circuit is obtained. Also, from the later stage of the CDR circuit in the other branch in the group 1 is obtained. The obtained signals are passed through low pass filters, and an average value over a plurality of symbols is obtained. The signal from the earlier stage of the CDR circuit is multiplied by the signal from the later stage, and they are averaged. The obtained value reflects the phase difference of the two delay interferometers in the group 1. The group 2 is monitored by using the same method.
摘要翻译：分支被分组成包括第一和第二分支的组1，以及包括第三和第四分支的组2。获得包含在组1中并处于CDR电路的较早阶段的一个分支中的双引脚光电二极管的信号。此外，从组1中的另一个分支中的CDR电路的后期获得。所获得的信号通过低通滤波器，并获得多个符号的平均值。来自CDR电路的较早阶段的信号乘以来自后期的信号，并将它们进行平均。所获得的值反映了组1中的两个延迟干涉仪的相位差。通过使用相同的方法监视组2。

3. 发明授权

US07676162B2 Phase monitor used in optical receiver 失效
标题翻译：相位监视器用于光接收机
公开(公告)号：US07676162B2
公开(公告)日：2010-03-09
申请号：US11605370
申请日：2006-11-29
申请人： Akihiko Isomura , Jens C. Rasmussen , Zhenning Tao , Noriaki Mizuguchi , Kenichi Kaburagi
发明人： Akihiko Isomura , Jens C. Rasmussen , Zhenning Tao , Noriaki Mizuguchi , Kenichi Kaburagi
IPC分类号： H04B10/06 , H04B10/12
CPC分类号： H04B10/677
摘要： Branches are grouped into a group 1 including first and second branches, and a group 2 including third and fourth branches. The signal after being passed through a dual pin photodiode in one branch included in the group 1 and being at the earlier stage of a CDR circuit is obtained. Also, from the later stage of the CDR circuit in the other branch in the group 1 is obtained. The obtained signals are passed through low pass filters, and an average value over a plurality of symbols is obtained. The signal from the earlier stage of the CDR circuit is multiplied by the signal from the later stage, and they are averaged. The obtained value reflects the phase difference of the two delay interferometers in the group 1. The group 2 is monitored by using the same method.
摘要翻译：分支被分组成包括第一和第二分支的组1，以及包括第三和第四分支的组2。获得包含在组1中并处于CDR电路的较早阶段的一个分支中的双引脚光电二极管的信号。此外，从组1中的另一个分支中的CDR电路的后期获得。所获得的信号通过低通滤波器，并获得多个符号的平均值。来自CDR电路的较早阶段的信号乘以来自后期的信号，并将它们进行平均。所获得的值反映了组1中的两个延迟干涉仪的相位差。通过使用相同的方法来监视组2。

4. 发明申请

US20090034967A1 PHASE MONITOR APPARATUS, PHASE CONTROL APPARATUS AND METHODS THEREOF FOR OPTICAL DQPSK RECEIVER 有权
标题翻译：相位监视器装置，相位控制装置及其用于光学DQPSK接收器的方法
公开(公告)号：US20090034967A1
公开(公告)日：2009-02-05
申请号：US11994649
申请日：2006-07-07
申请人： Zhenning Tao , Jens C. Rasmussen , Akihiko Isomura
发明人： Zhenning Tao , Jens C. Rasmussen , Akihiko Isomura
IPC分类号： H04B10/08
CPC分类号： H04B10/69 , H04B10/677
摘要： I branch is provided with a first interferometer, a first balanced optical detector, and a first data recovery circuit. Q branch is provided with a second interferometer, a second balanced optical detector and a second data recovery circuit. In I branch, a mixer multiples input signal of the first data recovery circuit with output signal of the second recovery circuit. An averaging circuit averages output signal of the mixer. In Q branch, a mixer multiples input signal of the second data recovery circuit with output signal of the first recovery circuit. An averaging circuit averages output signal of the mixer. A first phase control apparatus controls the phase of a phase shifter comprised in the first interferometer based on the output signal of the averaging circuit. A second phase control apparatus, in the same manner, controls the phase of a phase shifter comprised in the second interferometer.
摘要翻译： I分支设置有第一干涉仪，第一平衡光学检测器和第一数据恢复电路。 Q分支设置有第二干涉仪，第二平衡光学检测器和第二数据恢复电路。在I分支中，混频器将第一数据恢复电路的输入信号与第二恢复电路的输出信号相乘。平均电路对混频器的输出信号进行平均。在Q分支中，混频器将第二数据恢复电路的输入信号与第一恢复电路的输出信号相乘。平均电路对混频器的输出信号进行平均。第一相位控制装置基于平均电路的输出信号来控制包括在第一干涉仪中的移相器的相位。以相同的方式，第二相位控制装置控制包括在第二干涉仪中的移相器的相位。

5. 发明授权

US07877025B2 Phase monitor apparatus, phase control apparatus and methods thereof for optical DQPSK receiver 有权
标题翻译：相位监控装置，相位控制装置及其方法，用于光DQPSK接收机
公开(公告)号：US07877025B2
公开(公告)日：2011-01-25
申请号：US11994649
申请日：2006-07-07
申请人： Zhenning Tao , Jens C. Rasmussen , Akihiko Isomura
发明人： Zhenning Tao , Jens C. Rasmussen , Akihiko Isomura
IPC分类号： H04B10/06 , H04B10/04
CPC分类号： H04B10/69 , H04B10/677
摘要： I branch is provided with a first interferometer, a first balanced optical detector, and a first data recovery circuit. Q branch is provided with a second interferometer, a second balanced optical detector and a second data recovery circuit. In I branch, a mixer multiples input signal of the first data recovery circuit with output signal of the second recovery circuit. An averaging circuit averages output signal of the mixer. In Q branch, a mixer multiples input signal of the second data recovery circuit with output signal of the first recovery circuit. An averaging circuit averages output signal of the mixer. A first phase control apparatus controls the phase of a phase shifter comprised in the first interferometer based on the output signal of the averaging circuit. A second phase control apparatus, in the same manner, controls the phase of a phase shifter comprised in the second interferometer.
摘要翻译： I分支设置有第一干涉仪，第一平衡光学检测器和第一数据恢复电路。 Q分支设置有第二干涉仪，第二平衡光学检测器和第二数据恢复电路。在I分支中，混频器将第一数据恢复电路的输入信号与第二恢复电路的输出信号相乘。平均电路对混频器的输出信号进行平均。在Q分支中，混频器将第二数据恢复电路的输入信号与第一恢复电路的输出信号相乘。平均电路对混频器的输出信号进行平均。第一相位控制装置基于平均电路的输出信号来控制包括在第一干涉仪中的移相器的相位。以相同的方式，第二相位控制装置控制包括在第二干涉仪中的移相器的相位。

6. 发明授权

US07953328B2 Optical DQPSK transmitter phase monitor and control 有权
标题翻译：光DQPSK发射机相位监控
公开(公告)号：US07953328B2
公开(公告)日：2011-05-31
申请号：US11723938
申请日：2007-03-22
申请人： Zhenning Tao , Jens C. Rasmussen
发明人： Zhenning Tao , Jens C. Rasmussen
IPC分类号： H04B10/06
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。

7. 发明授权

US08655195B2 Average length magnitude detecting apparatus, and method 有权
标题翻译：平均长度检测装置及方法
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。

8. 发明授权

US08514922B2 Filter coefficient control apparatus and method 有权
标题翻译：滤波系数控制装置及方法
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。

9. 发明授权

US08374512B2 Frequency offset monitoring device and optical coherent receiver 有权
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.

10. 发明申请

US20120269247A1 MULTI-STAGE PHASE ESTIMATION METHOD AND APPARATUS 有权
标题翻译：多阶段相位估计方法和装置
公开(公告)号：US20120269247A1
公开(公告)日：2012-10-25
申请号：US13446690
申请日：2012-04-13
申请人： Jianqiang Li , Zhenning Tao , Lei Li
发明人： Jianqiang Li , Zhenning Tao , Lei Li
IPC分类号： H04B17/00
CPC分类号： H04L27/0014
摘要： The embodiments provide a multi-stage phase estimation method and apparatus. The apparatus i a multi-stage phase estimation configuration. Each stage of the phase estimation configuration includes metric computation modules. Each of the metric computation modules computing a distance metric and search phase angles according to an input signal and an initial search phase angle or a search phase angle of the former stage phase estimation configuration. The number of the metric computation modules is equal to that of the search phase angles of this stage. A selection module selects the search phase angle corresponding to the minimal distance metric as the phase estimation result output of this stage according to the computation results of all metric computation modules. The average time window length of the former stage phase estimation configuration is larger than that of the subsequent stage phase estimation configuration.
摘要翻译：实施例提供了多级相位估计方法和装置。该装置是多级相位估计配置。相位估计配置的每个阶段包括度量计算模块。每个度量计算模块根据前一级相位估计配置的输入信号和初始搜索相位角或搜索相位角计算距离度量和搜索相位角。度量计算模块的数量等于该阶段的搜索相位角的数量。选择模块根据所有度量计算模块的计算结果，选择与最小距离度量对应的搜索相位角作为该阶段的相位估计结果输出。前级相位估计配置的平均时间窗长度大于后级相位估计配置的平均时间窗长度。

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