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1. 发明专利

JP2013098983A Adaptive nonlinear equalization method and device 有权
标题翻译：自适应非线性均衡方法和设备
公开(公告)号：JP2013098983A
公开(公告)日：2013-05-20
申请号：JP2012236016
申请日：2012-10-25
申请人： Fujitsu Ltd , 富士通株式会社
发明人： WEITIAN YANG , TAO ZHENNING
IPC分类号： H04B10/2543 , H03F1/32 , H04B3/04 , H04B10/61 , H04J14/00 , H04J14/04 , H04J14/06
CPC分类号： H04B10/2572 , H04B10/2543
摘要： PROBLEM TO BE SOLVED: To provide adaptive nonlinear compensation method and device of a polarization multiplex optical communication system.SOLUTION: The adaptive nonlinear compensation device includes a horizontal polarization amount compensation unit for calculating the linear distortion value of an input signal on the basis of the input signal, the nonlinear distortion value of the horizontal component of the input signal, and the crosstalk value of the vertical component of the input signal for the horizontal component, and compensating for the horizontal component of the input signal on the basis of the linear distortion value, the nonlinear distortion value and the crosstalk value, and a vertical polarization amount compensation unit for calculating the linear distortion value of an input signal on the basis of the input signal, the nonlinear distortion value of the vertical component of the input signal, and the crosstalk value of the horizontal component of the input signal for the vertical component, and compensating for the vertical component of the input signal on the basis of the linear distortion value, the nonlinear distortion value and the crosstalk value.
摘要翻译：要解决的问题：提供偏振复用光通信系统的自适应非线性补偿方法和装置。解决方案：自适应非线性补偿装置包括：水平极化量补偿单元，用于根据输入信号，输入信号的水平分量的非线性失真值，以及输入信号的线性失真值，基于线性失真值，非线性失真值和串扰值补偿输入信号的水平分量的垂直分量的串扰值，以及垂直极化量补偿单元用于基于输入信号，输入信号的垂直分量的非线性失真值和垂直分量的输入信号的水平分量的串扰值来计算输入信号的线性失真值，以及补偿对于基于线性失真值的输入信号的垂直分量，非线性失真值和串扰值。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2012034347A Cross phase modulation compensation device and method 审中-公开
标题翻译：交叉相位调制补偿装置及方法
公开(公告)号：JP2012034347A
公开(公告)日：2012-02-16
申请号：JP2011124208
申请日：2011-06-02
申请人： Fujitsu Ltd , 富士通株式会社
发明人： WEITIAN YANG , TAO ZHENNING
IPC分类号： H04B10/2507 , H04B10/2557
CPC分类号： H04L27/20 , H04L5/04 , H04L25/03006 , H04L27/06 , H04L27/3854
摘要： PROBLEM TO BE SOLVED: To provide a cross phase modulation compensation device and method, capable of eliminating the influence of cross phase modulation.SOLUTION: This invention provides the cross phase modulation compensation device and method. The cross phase modulation compensation device includes cascade-connected cross phase modulation compensators in M stages. In this case, M≥2 is defined. The cross phase modulation compensator in each stage is used to reduce influence of the cross phase modulation on polarization-demultiplexed baseband signals inputted to the cross phase modulation compensator in the stage. Further, an optical coherent receiver including the device is provided.
摘要翻译：要解决的问题：提供能够消除交叉相位调制的影响的交叉相位调制补偿装置和方法。解决方案：本发明提供了交叉相位调制补偿装置和方法。交叉相位调制补偿装置包括M级级联连接的交叉相位调制补偿器。在这种情况下，定义M≥2。每级中的交叉相位调制补偿器用于减少交叉相位调制对在阶段中输入到交叉相位调制补偿器的偏振解复用基带信号的影响。此外，提供了包括该装置的光学相干接收机。版权所有（C）2012，JPO＆INPIT

3. 发明专利

JP2011120234A Crosstalk coefficient estimating apparatus, and crosstalk coefficient estimating method 有权
标题翻译： CROSSTALK系数估计装置和CROSSTALK系数估计方法
公开(公告)号：JP2011120234A
公开(公告)日：2011-06-16
申请号：JP2010260636
申请日：2010-11-22
申请人： Fujitsu Ltd , 富士通株式会社
发明人： LIU LING , TAO ZHENNING , ODA SHOICHIRO
IPC分类号： H04J14/00 , H04B10/2507 , H04J14/04 , H04J14/06
CPC分类号： H04B10/0795
摘要： PROBLEM TO BE SOLVED: To provide a configuration and a method for appropriately estimating polarization crosstalk between channels in an optical communication system. SOLUTION: A crosstalk coefficient estimating apparatus includes a complex conjugate unit, a multiplying unit, and a filter and is used to estimate a crosstalk coefficient of crosstalk inflicted on a first channel in an optical fiber transmission system including a plurality of channels. The complex conjugate unit obtains a complex conjugate signal for signal in one polarization-state of a second channel. The multiplying unit multiplies the complex conjugate signal obtained by the complex conjugate unit by signal in another polarization-state of the second channel. The filter filters the multiplication result of the multiplying unit to obtain a crosstalk coefficient of crosstalk inflicted on the signal in one polarization-state of the first channel. A transfer function of the filter is set based on a system parameter of the optical fiber transmission system. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于适当地估计光通信系统中的信道之间的偏振串扰的配置和方法。解决方案：串扰系数估计装置包括复共轭单元，乘法单元和滤波器，并且用于估计包括多个信道的光纤传输系统中在第一信道上产生的串扰的串扰系数。复共轭单元获得用于第二信道的一个极化状态下的信号的复共轭信号。乘法单元将由复共轭单位获得的复共轭信号乘以第二信道的另一极化状态的信号。滤波器对乘法单元的相乘结果进行滤波，以获得在第一信道的一个极化状态下对信号产生的串扰的串扰系数。基于光纤传输系统的系统参数设置滤波器的传递函数。版权所有（C）2011，JPO＆INPIT

4. 发明专利

JP2014160269A Device and method for controlling external modulator 有权
标题翻译：用于控制外部调制器的装置和方法
公开(公告)号：JP2014160269A
公开(公告)日：2014-09-04
申请号：JP2014083041
申请日：2014-04-14
申请人： Fujitsu Ltd , 富士通株式会社
发明人： DOU LIANG , TAO ZHENNING , ODA SHOICHIRO
IPC分类号： G02F1/01
CPC分类号： H04B10/50575 , H04B10/50595
摘要： PROBLEM TO BE SOLVED: To provide a control device or a control method for controlling an optical modulator with accuracy.SOLUTION: An external modulator control device includes: a mixing unit that mixes an optical signal modulated by an external modulator and an optical signal not modulated by the external modulator so as to obtain a plurality of mixed optical signals; an electric differentiating unit that converts the plurality of mixed optical signals into a plurality of corresponding electric signals and obtains a difference of voltages of the plurality of electric signals so as to obtain a differential signal; a power detection unit that detects power of the differential signal; and a controller that controls a bias voltage of the external modulator so that the power detected by the power detection unit becomes small.
摘要翻译：要解决的问题：提供一种用于精确控制光调制器的控制装置或控制方法。解决方案：外部调制器控制装置包括：混合单元，其将由外部调制器调制的光信号和未调制的光信号通过外部调制器获得多个混合光信号; 电差分单元，将多个混合光信号转换为多个相应的电信号，并获得多个电信号的电压差，以获得差分信号; 功率检测单元，其检测差分信号的功率; 以及控制器，其控制外部调制器的偏置电压，使得由电力检测单元检测到的功率变小。

5. 发明专利

JP2014060708A Coefficient decision device, equalizer, receiver, and transmitter 有权
标题翻译：系统决策设备，均衡器，接收器和发送器
公开(公告)号：JP2014060708A
公开(公告)日：2014-04-03
申请号：JP2013180124
申请日：2013-08-30
申请人： Fujitsu Ltd , 富士通株式会社
发明人： YAN MENG , TAO ZHENNING , LI LEI
IPC分类号： H04B3/10 , H04L27/01
CPC分类号： H04B10/2507 , H04L7/042 , H04L25/03006 , H04L2027/0026
摘要： PROBLEM TO BE SOLVED: To provide a coefficient decision device capable of approximately compensating for signal damages by determining an initial tap coefficient for an equalizer closer to an optimum value by using a training sequence provided in a transmission signal, and then causing a receiver to further process the signals.SOLUTION: A coefficient decision device includes a synchronizer for searching for a position of a training sequence within a data signal, where the training sequence is provided in the data signal received from a transmitter, and a first processing device for determining an initial tap coefficient for an equalizer based on the received data signal and training sequence. In each polarized wave condition, the training sequence includes n pairs of training codes, and in the n pairs of training codes, the training codes of the same pair are identical, the training codes of the different pair are different, a cyclic prefix and a cyclic postfix are respectively provided before and after each pair of training codes, and n is an integer greater than 1.
摘要翻译：要解决的问题：提供一种能够通过使用在发送信号中提供的训练序列确定更接近最佳值的均衡器的初始抽头系数，并且然后使接收器进一步提供能够近似补偿信号损伤的系数判定装置处理信号。解决方案：系数判定装置包括用于搜索在从发送器接收的数据信号中提供训练序列的数据信号内的训练序列的位置的同步器，以及用于确定基于所接收的数据信号和训练序列的均衡器的初始抽头系数。在每个极化波条件下，训练序列包括n对训练码，并且在n对训练码中，同一对训练码相同，不同对的训练码不同，循环前缀和分别在每对训练码之前和之后提供循环后缀，并且n是大于1的整数。

6. 发明专利

JP2012186807A 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：JP2012186807A
公开(公告)日：2012-09-27
申请号：JP2012048645
申请日：2012-03-05
申请人： Fujitsu Ltd , 富士通株式会社
发明人： WEITIAN YANG , TAO ZHENNING , HOSHIDA GOJI
IPC分类号： H04B10/69
CPC分类号： H04L25/0202 , H04B10/6971
摘要： PROBLEM TO BE SOLVED: To use a back-propagation unit of fewer stages under the same performance through constructing multiplicators by calculating multiplicative parameters in each stage of the back-propagation unit, so that complexity is further decreased.SOLUTION: The method for compensating nonlinear damage comprises the steps of: 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; delaying the input time-domain signals; and compensating the delayed input time-domain signals using the plurality of multiplicators.
摘要翻译：要解决的问题：为了通过在反向传播单元的每个级中计算乘法参数来构造乘数来在相同性能下使用较少级的反向传播单元，从而进一步降低复杂度。解决方案：用于补偿非线性损伤的方法包括以下步骤：根据输入时域信号，计算表示对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; 延迟输入时域信号; 以及使用所述多个乘法器来补偿所述延迟的输入时域信号。版权所有（C）2012，JPO＆INPIT

7. 发明专利

JP2011250414A Bit and power allocation method, device, and communication system 有权
标题翻译：位和功率分配方法，设备和通信系统
公开(公告)号：JP2011250414A
公开(公告)日：2011-12-08
申请号：JP2011119607
申请日：2011-05-27
申请人： Fujitsu Ltd , 富士通株式会社
发明人： HUIJIAN ZHANG , TAO ZHENNING
IPC分类号： H04L27/26 , H04J1/00 , H04J11/00
CPC分类号： H04L5/0007 , H04L1/0016 , H04L1/0021 , H04L5/0046 , H04L5/006
摘要： PROBLEM TO BE SOLVED: To accurately perform bit and power allocation which is used in a multiple subchannel parallel communication system.SOLUTION: A candidate modulation system aggregate for each subchannel is determined. An S/N ratio search table is constructed based on a target bit error rate which is predetermined. The S/N ratio search table contains a correspondence between the S/N ratio in the target bit error rate and the bit number corresponding to respective modulation systems in the candidate modulation system aggregate. A normalized S/N ratio for each subchannel is obtained. The bit number of each channel is initialized. The power of each subchannel is initialized based on the bit number of each channel, the normalized S/N ratio of each subchannel, and the S/N ratio search table. Further, according to the principle of power utilization rate maximization, adjustment is applied to the power and the bit number of each subchannel, resulting in allocation of power and bit number of each subchannel.
摘要翻译：要解决的问题：准确地执行在多个子信道并行通信系统中使用的比特和功率分配。解决方案：确定每个子信道的候选调制系统聚合。基于预定的目标比特误码率构建S / N比搜索表。 S / N比搜索表包含目标比特误码率中的S / N比与对应于候选调制系统聚合中各调制系统的比特数之间的对应关系。获得每个子信道的归一化S / N比。每个通道的位数被初始化。基于每个信道的比特数，每个子信道的归一化S / N比和S / N比搜索表来初始化每个子信道的功率。此外，根据功率利用率最大化的原理，对每个子信道的功率和位数进行调整，导致每个子信道的功率和位数的分配。版权所有（C）2012，JPO＆INPIT

8. 发明专利

JP2011118360A Device and method for monitoring modulator 有权
标题翻译：用于监测调制器的装置和方法
公开(公告)号：JP2011118360A
公开(公告)日：2011-06-16
申请号：JP2010223078
申请日：2010-09-30
申请人： Fujitsu Ltd , 富士通株式会社
发明人： DOU LIANG , TAO ZHENNING , ODA SHOICHIRO
IPC分类号： G02F1/01
CPC分类号： H04B10/50575 , H04B10/50595
摘要： PROBLEM TO BE SOLVED: To provide a monitoring device or a monitoring method for accurately controlling an optical modulator. SOLUTION: An external modulator monitoring device includes: a mixing unit mixing an optical signal modulated by an external modulator with an optical signal not modulated by the external modulator to obtain a plurality of mixed optical signals; an electric differentiating unit converting the plurality of mixed optical signals into a plurality of corresponding electric signals and obtaining a voltage difference of the plurality of electric signals to obtain a difference signal; and a power detecting unit detecting the power of the difference signal. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于精确控制光学调制器的监视装置或监视方法。解决方案：一种外部调制器监视装置，包括：混合单元，将由外部调制器调制的光信号与未被外部调制器调制的光信号混合，以获得多个混合光信号; 电差分单元将所述多个混合光信号转换为多个对应的电信号，并获得所述多个电信号的电压差以获得差分信号; 以及检测所述差分信号的功率的功率检测单元。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JP2009253972A Filter coefficient changing apparatus and method 有权
标题翻译：过滤器系统更换装置和方法
公开(公告)号：JP2009253972A
公开(公告)日：2009-10-29
申请号：JP2009017057
申请日：2009-01-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： LIU LING , TAO ZHENNING , TANIMURA TAKAHITO
IPC分类号： H04B7/005 , H04B3/06 , H04B10/07 , H04B10/2507 , H04B10/28 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/60 , H04B10/61 , H04J14/00 , H04J14/04 , H04J14/06
CPC分类号： H04B10/6971 , H04B10/60 , H04B10/611 , H04B10/616
摘要： PROBLEM TO BE SOLVED: To provide a filter coefficient changing apparatus and method for use in a dual-polarized optical coherent receiver. SOLUTION: A filter coefficient changing apparatus includes a controlling unit, a switching unit and a new coefficient acquisition unit. The switching unit is connected between a first filter coefficient updating unit and first and second filtering units. The new coefficient acquisition unit generates new filter coefficients for the first and second filtering units in accordance with filter coefficients output by a second filter coefficient updating unit. 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 acquisition unit to the first filtering unit and second filtering units, and subsequently resumes the output of the filter coefficients from the first filter coefficient updating unit to the first and second filtering units. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于双偏振光学相干接收机的滤波器系数改变装置和方法。解决方案：滤波器系数改变装置包括控制单元，开关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和第二滤波单元之间。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器系数，为第一和第二滤波单元生成新的滤波器系数。控制单元产生控制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传输到第一滤波单元和第二滤波单元，随后恢复输出从第一滤波器系数更新单元到第一和第二滤波单元的滤波器系数。版权所有（C）2010，JPO＆INPIT

10. 发明专利

JP2015012611A チャネル内の非線形損害の推定装置及び推定方法审中-公开
标题翻译：估计内部通道非线性损伤的装置和方法
公开(公告)号：JP2015012611A
公开(公告)日：2015-01-19
申请号：JP2014127281
申请日：2014-06-20
申请人：富士通株式会社 , Fujitsu Ltd
发明人： FAN YANGYANG , DOU LIANG , TAO ZHENNING
IPC分类号： H04B10/07 , G01M11/00
CPC分类号： H04B10/0731 , H04B10/07951
摘要：【課題】チャネル内の非線形損害の推定装置及び方法を提供する。【解決手段】推定装置は、光ファイバ伝送リンクのパラメータに基づいて、該光ファイバ伝送リンクの非線形位相シフト重み付け分散分布関数を決定する第1の決定部と、該光ファイバ伝送リンクの非線形位相シフト重み付け分散分布関数を少なくとも1つの矩形に分割する分割部と、該少なくとも1つの矩形の各矩形の非線形摂動係数をそれぞれ計算し、各矩形の非線形摂動係数の和を求め、該光ファイバ伝送リンクの非線形摂動係数を取得する計算部と、該光ファイバ伝送リンクの非線形摂動係数に基づいて、該光ファイバ伝送リンクのチャネル内の非線形損害を決定する第2の決定部と、を含む。任意の分散管理リンクにおける非線形損害を推定でき、計算の複雑さを低減できる。【選択図】図5
摘要翻译：要解决的问题：提供一种用于估计信道内非线性损伤的装置和方法。解决方案：估计装置包括：第一确定单元，被配置为根据以下的方式确定光纤传输链路的非线性相移加权色散分布函数光纤传输链路参数; 分割单元，被配置为将所述光纤传输链路的非线性相移加权色散分布函数分割成至少一个矩形; 计算单元，被配置为分别计算所述至少一个矩形中的每个矩形的非线性扰动系数，并对所有矩形的非线性扰动系数执行求和，以获得所述光纤传输链路的非线性扰动系数; 以及第二确定单元，被配置为根据所述光纤传输链路的非线性扰动系数来确定所述光纤传输链路的信道内非线性损伤。可以估计任何色散管理链路中的非线性损伤，并且可以降低计算的复杂性。

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