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1. 发明公开

EP2651084A2 Method and apparatus for compensating nonlinear distortions in intensity modulation-direct detection system 失效
标题翻译：一种用于在系统补偿非线性失真的方法和装置IMDD
公开(公告)号：EP2651084A2
公开(公告)日：2013-10-16
申请号：EP13163313.3
申请日：2013-04-11
申请人： FUJITSU LIMITED
发明人： Yan, Weizhen , Liu, Bo , Li, Lei , Tao, Zhenning , Tanaka, Toshiki
IPC分类号： H04L25/02
CPC分类号： H04B10/2507 , H04L25/0202 , H04L25/03019 , H04L2025/03375 , H04L2025/03592
摘要： The embodiments of the present invention provide a method and an apparatus for compensating nonlinear distortions in an intensity modulation-direct detection (IM-DD) system; wherein the method comprises: calculating, according to nonlinear coefficients and differences between values of an input signal at different time, nonlinear distortions of the input signal, so as to eliminate the nonlinearity distortions. By applying the method and the apparatus provided by the embodiments of the present invention, nonlinear cost of the IM-DD system can be effectively reduced, thereby improving the system capacity.
摘要翻译：本发明的实施例提供了在强度调制的直接检测（IM-DD）系统补偿非线性失真的方法和装置来; worin该方法包括：计算，gemäß非线性系数和在不同时间的输入信号的值之间的差，在输入信号的非线性失真，从而消除非线性失真。通过应用该方法和通过本发明的实施例提供的装置中，IM-DD系统的非线性成本可以有效地降低，从而改善了系统容量。

2. 发明公开

EP2629471A2 Nonlinear Compensating Apparatus and Method and Transmitter 有权
标题翻译： Nichtlineare Kompensierungsvorrichtung und Verfahren und Sender
公开(公告)号：EP2629471A2
公开(公告)日：2013-08-21
申请号：EP13155921.3
申请日：2013-02-20
申请人： FUJITSU LIMITED
发明人： Dou, Liang , Tao, Zhenning
IPC分类号： H04L25/03
CPC分类号： H04B10/58 , H04B10/2543 , H04L25/03343
摘要： The present invention provides a nonlinear compensating apparatus and method and a transmitter. The nonlinear compensating apparatus includes: an information sequence acquiring unit, configured to acquire a symbol information sequence of the pulse signal; a perturbation quantity acquiring unit, configured to calculate, by pre-obtained weighting coefficients to which each item corresponds, the weighted sum of interaction items of pulses on one or more moments relative to the current moment; a perturbation quantity processing unit, configured to combine the items of the perturbation quantity based on the weighting coefficients; and an information compensating unit, configured to calculate a difference between the symbol information sequence and the processed perturbation quantity to obtain a compensated symbol information sequence. With the embodiments of the present invention, the complexity of calculation may be further lowered, and requirements on hardware may also be lowered.
摘要翻译：本发明提供一种非线性补偿装置和方法以及发射机。非线性补偿装置包括：信息序列获取单元，被配置为获取脉冲信号的符号信息序列; 扰动量获取单元，被配置为通过预先获得的每个项目所对应的加权系数来计算相对于当前时刻的一个或多个时刻上的相互作用项目的加权和; 扰动量处理单元，被配置为基于所述加权系数组合所述扰动量的项; 以及信息补偿单元，被配置为计算符号信息序列和所处理的扰动量之间的差以获得经补偿的符号信息序列。利用本发明的实施例，可以进一步降低计算的复杂度，并且还可以降低对硬件的要求。

3. 发明公开

EP1838064A3 Apparatus and method for I-Q quadrature modulation transmitter and its I-Q phase bias monitoring 有权
标题翻译： Vorrichtung und Verfahrenfüreinen I-Q-Quadraturmodulationssender und I-Q-Phasenabweichungsüberwachungdavon
公开(公告)号：EP1838064A3
公开(公告)日：2013-03-06
申请号：EP07004237.9
申请日：2007-03-01
申请人： FUJITSU LIMITED
发明人： Tao, Zhenning , Rasmussen, Jens C.
IPC分类号： H04L27/36 , G02F1/01 , G02F1/225
CPC分类号： H04L27/364 , G02F1/0123 , G02F1/2255 , H04B10/5561
摘要： Apparatus and method for I-Q quadrature modulation transmitter and I-Q phase bias monitoring. The said I-Q quadrature modulation transmitter consists of I-branch (102), Q-branch (103) equipped with a phase bias (108), and tap (110). The said I-Q phase bias monitoring apparatus (113) is installed between the above tap and the above phase bias, with the purpose to monitor the phase of the phase bias. It is characterized by the following components: Module squarer (114) for receiving signal from the tap and outputting module square of the signal; Multiplier (116) for multiplying data of I-branch, data of Q-branch and output of module squarer; and Averager (118) for averaging the output of multiplier; Phase adjuster (120) for adjusting the I-Q phase bias according to output of the Averager.
摘要翻译：用于I-Q正交调制发射机和I-Q相位偏置监测的装置和方法。所述I-Q正交调制发射机由配备有相位偏压（108）和抽头（110）的I分支（102），Q分支（103）组成。所述I-Q相位偏置监视装置（113）安装在上述抽头和上述相位偏置之间，目的是监视相位偏置的相位。其特征在于以下组件：模块平方（114），用于从抽头接收信号并输出模块的信号平方; 乘法器（116），用于将I分支的数据，Q分支的数据和模块平方的输出相乘; 和平均值（118），用于平均乘数的输出; 相位调节器（120），用于根据平板机的输出调节I-Q相位偏置。

4. 发明公开

EP2434668A1 Nonlinear compensating apparatus and transmitter 有权
标题翻译： Nicht lineare Ausgleichsvorrichtung和Sende-Empfänger
公开(公告)号：EP2434668A1
公开(公告)日：2012-03-28
申请号：EP11182148.4
申请日：2011-09-21
申请人： FUJITSU LIMITED
发明人： Dou, Liang , Tao, Zhenning
IPC分类号： H04B10/17 , H04B10/18 , H04L25/03 , H04L27/36
CPC分类号： H04B10/2543 , H04B10/2939
摘要： The present invention provides nonlinear compensating apparatus and transmitter. The nonlinear compensating apparatus comprises: an information acquiring unit to acquire a symbol information sequence of the pulse information input by a transmitting side; a perturbation quantity calculating unit to calculate the weighted sum of the interaction of the pulses of several items at several different instants relative to the current instant, to obtain the perturbation quantity produced by the current instant nonlinear effect on a transmission link of a certain length; and an information compensating unit to compensate for the symbol information sequence of the pulses at the current instant acquired by the information acquiring unit by using the perturbation quantity obtained by the perturbation quantity calculating unit, so as to obtain the symbol information sequence compensated at the current instant to cause the transmitting side to transmit signals according to the compensated symbol information sequence. The apparatus corrects the symbol information sequence of the pulse signals input by a transmitting side, with the complexity of calculation being low, and the apparatus is applicable to single-polarization and dual-polarization multiplexing systems, and at the same time, compatible with any modulation format.
摘要翻译：本发明提供了非线性补偿装置和发射机。非线性补偿装置包括：信息获取单元，用于获取由发送侧输入的脉冲信息的符号信息序列; 扰动量计算单元，用于计算在若干不同时刻相对于当前时刻的若干项目的脉冲的相互作用的加权和，以获得由当前瞬时非线性效应产生的扰动量对一定长度的传输链路; 以及信息补偿单元，用于通过使用由扰动量计算单元获得的扰动量来补偿由信息获取单元获取的当前时刻的脉冲的符号信息序列，以便获得在当前时间补偿的符号信息序列立即使发送侧根据经补偿的符号信息序列发送信号。该装置校正由发送侧输入的脉冲信号的符号信息序列，计算的复杂度低，并且该装置可应用于单极化和双偏振复用系统，并且同时兼容任何调制格式。

5. 发明授权

EP2709328B1 Coefficient determining apparatus, equalizer, receiver and transmitter 有权
公开(公告)号：EP2709328B1
公开(公告)日：2019-01-02
申请号：EP13184538.0
申请日：2013-09-16
申请人： FUJITSU LIMITED
发明人： Yan, Meng , Tao, Zhenning , Li, Lei
IPC分类号： H04L25/03 , H04L7/04 , H04L27/00 , H04B10/2507

6. 发明授权

EP2639976B1 Inverse channel apparatus and transmitter, receiver and system containing the apparatus 有权
标题翻译：逆信道装置和包含该装置的发射机，接收机和系统
公开(公告)号：EP2639976B1
公开(公告)日：2018-04-25
申请号：EP13158130.8
申请日：2013-03-07
申请人： FUJITSU LIMITED
发明人： Yan, Weizhen , Tao, Zhenning
IPC分类号： H04B10/2507 , H04B10/2543
CPC分类号： H04B10/2507 , H04B10/2543
摘要： The embodiments of the present invention provide an inverse channel apparatus and transmitter, receiver and system containing the apparatus; wherein the inverse channel apparatus comprises: an inverse nonlinear calculating unit configured to perform nonlinear additive calculation and nonlinear multiplicative calculation on input signals, so as to obtain signals containing nonlinear damage of the input signals on at least one polarization state; and an inverse linear calculating unit configured to calculate signals containing nonlinear damage and linear damage of the input signals on at least one polarization state according to the signals containing nonlinear damage of the input signals on at least one polarization state and a linear function of a channel. The advantages of the embodiments of the present invention exist in that a transmitted signal is recovered by being passed through an inverse channel after or before being transmitted in a practical channel, thereby effectively compensating for intra-channel nonlinear damage of an optical fiber communication system.

7. 发明授权

EP2709327B1 Updating apparatus and method for equalizer coefficient, receiver and optical communication system 失效
标题翻译：更新均衡器系数的设备和方法，接收机和光通信系统
公开(公告)号：EP2709327B1
公开(公告)日：2018-01-03
申请号：EP13183503.5
申请日：2013-09-09
申请人： FUJITSU LIMITED
发明人： Dou, Liang , Tao, Zhenning
IPC分类号： H04L25/03 , H04B10/00 , H04B10/2507 , H04B10/61
CPC分类号： H04B10/25073 , H04B10/616 , H04B10/6162 , H04L25/03006 , H04L25/0305 , H04L25/03114 , H04L2025/03426 , H04L2025/03592 , H04L2025/0377
摘要： The present invention provides an updating apparatus and method for an equalizer coefficient, receiver and optical communication system. The updating method comprises: receiving an optical signal transmitted by a transmitter in an optical communication system, the optical signal comprising transmission data and a constant modulus signal for updating a coefficient of an equalization filter; performing coherent detection and analog-to-digital conversion on the optical signal, so as to obtain a digital electric signal; and updating the coefficient of the equalization filter at a symbol corresponding to the constant modulus signal in the digital electric signal. With the embodiments of the present invention, not only the coefficients of the equalizer may be optimized, but also being adapted to signals in various modulation formats, and the complexity of the channel equalization may be lowered as well.

8. 发明授权

EP2391048B1 Method and apparatus for bit and power allocation, and communication system 有权
标题翻译：用于比特和功率分配的方法和设备以及通信系统
公开(公告)号：EP2391048B1
公开(公告)日：2017-06-28
申请号：EP11165450.5
申请日：2011-05-10
申请人： FUJITSU LIMITED
发明人： Zhang, Huijian , Tao, Zhenning
IPC分类号： H04L5/00 , H04L1/00 , H04L27/26
CPC分类号： H04L5/0007 , H04L1/0016 , H04L1/0021 , H04L5/0046 , H04L5/006

9. 发明公开

EP2391048A2 Method and apparatus for bit and power allocation, and communication system 有权
标题翻译： Verfahren und Vorrichtung zur Bit- und Energiezuweisung und Kommunikationssystem
公开(公告)号：EP2391048A2
公开(公告)日：2011-11-30
申请号：EP11165450.5
申请日：2011-05-10
申请人： FUJITSU LIMITED
发明人： Zhang, Huijian , Tao, Zhenning
IPC分类号： H04L5/00
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

EP2495888B1 Method and apparatus for compensating nonlinear damage 有权
公开(公告)号：EP2495888B1
公开(公告)日：2019-05-08
申请号：EP12150907.9
申请日：2012-01-12
申请人： Fujitsu Limited
发明人： Yan, Weizhen , Tao, Zhenning , Hoshida, Takeshi
IPC分类号： H04B10/69 , H04B10/255

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