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1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

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

US08798477B2 Chromatic dispersion monitor and method, chromatic dispersion compensator 有权
标题翻译：色散监测和方法，色散补偿器
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。

8. 发明授权

US08693892B2 External modulator monitoring device and external modulator monitoring method 有权
公开(公告)号：US08693892B2
公开(公告)日：2014-04-08
申请号：US12897331
申请日：2010-10-04
申请人： Liang Dou , Zhenning Tao
发明人： Liang Dou , Zhenning Tao
IPC分类号： H04B10/50
摘要： This invention relates to external modulator monitoring device and method for monitoring an external modulator. The external modulator monitoring device includes a mixing unit for mixing optical signals modulated by the external modulator and optical signals not modulated by the external modulator, so as to obtain multiple branches of mixed optical signals; an electrical differential unit for converting the multiple branches of mixed optical signals into corresponding multiple branches of electrical signals, and performing a differential processing on voltages of the multiple branches of electrical signals to obtain differential signals; and a power detection unit for detecting power of the differential signals.

9. 发明授权

US08687646B2 Method and apparatus for bit and power allocation, and communication system 有权
标题翻译：用于位和功率分配的方法和装置以及通信系统
公开(公告)号：US08687646B2
公开(公告)日：2014-04-01
申请号：US13114537
申请日：2011-05-24
申请人： Huijian Zhang , Zhenning Tao
发明人： Huijian Zhang , Zhenning Tao
IPC分类号： H04J3/16
CPC分类号： H04L5/0007 , H04L1/0016 , H04L1/0021 , H04L5/0046 , H04L5/006
摘要： The present invention discloses a method and apparatus for bit and power allocation and a communication system. The method for bit and power allocation comprises: determining a set of candidate modulation modes for sub-channels; constructing an SNR lookup table according to a predetermined target BER, the SNR lookup table containing a relationship of an SNR and the number of bits corresponding to a modulation mode in the set of candidate modulation modes at the target BER; obtaining normalized SNRs on the sub-channels; initializing the numbers of bits for the sub-channels; initializing powers for the sub-channels according to the numbers of bits for the sub-channels, the normalized SNRs on the sub-channels and the SNR lookup table; and adjusting the numbers of bits and the powers for the sub-channels in accordance with a principle of maximizing power utilization rate, to obtain the result of the bit and power allocation for the sub-channels.
摘要翻译：本发明公开了一种用于比特和功率分配的方法和装置以及通信系统。用于比特和功率分配的方法包括：确定用于子信道的一组候选调制模式; 根据预定目标BER构建SNR查找表，所述SNR查找表包含与所述目标BER中的候选调制模式集合中的调制模式相对应的SNR和比特数的关系; 在子信道上获得归一化的SNR; 初始化子信道的比特数; 根据子信道的比特数，子信道的归一化SNR和SNR查找表，初始化子信道的功率; 并且根据最大化功率利用率的原理来调整子信道的比特数和功率，以获得子信道的比特和功率分配的结果。

10. 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。

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