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1. 发明公开

EP3352389A1 SYSTEM AND METHOD FOR PROCESSING AN ELECTROMAGNETIC SIGNAL 有权
公开(公告)号：EP3352389A1
公开(公告)日：2018-07-25
申请号：EP17173378.5
申请日：2017-05-30
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Nowak, Thomas , Volle, Christian
IPC分类号： H04B10/2575 , H04B10/58 , H04B1/14
CPC分类号： H04B10/2543 , H04B1/14 , H04B10/2504 , H04B10/2575 , H04B10/25759 , H04B10/58 , H04B10/85 , H04B2210/254
摘要： A system (10) for processing an electromagnetic signal is described, wherein the system (10) comprises a transmission path (16) with limited dynamic range and a pre-selection unit (22) that is positioned upstream the transmission path (16). The pre-selection unit (22) is configured to pre-select signal portions and to control the level of the output electromagnetic signal. A mixing unit (30) is positioned between the pre-selection unit (22) and the transmission path (16). Further, a method for processing an electromagnetic signal is described.

2. 发明公开

EP3208954A4 OPTICAL UP/DOWN-CONVERSION-TYPE OPTICAL PHASE CONJUGATE PAIR SIGNAL TRANSMISSION/RECEPTION CIRCUIT 有权转让
公开(公告)号：EP3208954A4
公开(公告)日：2018-07-11
申请号：EP15853196
申请日：2015-09-02
申请人： NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATION TECH
发明人： SAKAMOTO TAKAHIDE
IPC分类号： H04B10/2543 , G02F1/01 , G02F2/00 , H04B10/2575
CPC分类号： H04B10/2507 , G02F1/01 , G02F1/2255 , G02F2/00 , G02F2001/212 , H04B10/2543 , H04B10/2575 , H04B10/516 , H04B10/58
摘要： [Problem] To provide a method capable of easily compensating waveform distortion due to a non-linear effect caused by a complicated electric circuit, and a device for implementing the method. [Solution] Provided are a method capable of effectively compensating signal degradation such as waveform distortion due to a nonlinear effect caused by an optical fiber that is an optical transfer path using an optical phase conjugate signal pair at the time of optical up-conversion or down-conversion, and a device capable of implementing the method. This emission device 25 includes an optical modulator 11, a signal source 13, an optical fiber 15, a multiplexing unit 17, a multiplexing local signal source 19, an optical detector 21, and a transmission antenna 23.

3. 发明公开

EP3324559A1 OPTICAL TRANSMISSION METHOD, OPTICAL TRANSMISSION APPARATUS, AND OPTICAL TRANSMISSION SYSTEM 审中-公开
公开(公告)号：EP3324559A1
公开(公告)日：2018-05-23
申请号：EP17201043.1
申请日：2017-11-10
申请人： FUJITSU LIMITED
发明人： Irie, Hiroyuki
IPC分类号： H04B10/2543 , H04B10/2557 , H04B10/50
CPC分类号： H04B10/50 , H04B10/2543 , H04B10/2557 , H04J14/06
摘要： An optical transmission method executed by a processor included in an optical transmission apparatus, the optical transmission method includes outputting, by using a first polarized wave, a first frame with a first fixed pattern representing a given arrangement of binary numbers for establishing synchronization; outputting, by using a second polarized wave orthogonal to the first polarized wave, a second frame with a second fixed pattern in which at least part of the first fixed pattern is reversed; multiplexing the first polarized wave and the second polarized wave to generate an optical signal; and transmitting the generated optical signal.

4. 发明授权

EP2321679B1 REMOTE LARGER EFFECTIVE AREA OPTICAL FIBER 失效转让
标题翻译：远距离有效区域光纤
公开(公告)号：EP2321679B1
公开(公告)日：2018-03-21
申请号：EP09810515.8
申请日：2009-08-25
申请人： Neptune Subsea IP Limited
发明人： CHANG, DO-IL , PUC, Andrej, B.
IPC分类号： G02B6/10 , H04B10/2543 , H04B10/291
CPC分类号： H04B10/2543 , G02B6/02019 , H04B10/2916
摘要： Embodiments described herein relate to an optical fiber stretch that may experience forward Raman amplification in which the peak optical signal power occurs at some distance from the transmitter. Smaller effective area optical fiber is used at a portion of the optical fiber stretch in which the optical signal power is increasing, while larger effective area optical fiber is used at a more remote stretch of the optical fiber stretch that experiences the peak optical signal power. Thus, the quality of the signal is better preserved since the larger effective area fiber reduces maximum optical signal density thereby reducing non-linear degradations on signal quality.

5. 发明公开

EP3249819A1 LOOKUP TABLE GENERATION METHOD AND DEVICE, AND PRE-COMPENSATION METHOD AND DEVICE 有权
标题翻译：查找表生成方法和装置，以及预补偿方法和装置
公开(公告)号：EP3249819A1
公开(公告)日：2017-11-29
申请号：EP15886934.7
申请日：2015-04-01
申请人： Huawei Technologies Co. Ltd.
发明人： KE, Jianhong , TANG, Xuefeng , LI, Chuandong , ZHANG, Zhuhong , CHEN, Jun , CAI, Zhongheng
IPC分类号： H04B1/00
CPC分类号： H04B10/58 , H04B1/62 , H04B10/2543 , H04B2001/0425 , H04B2210/254 , H04L27/367
摘要： Embodiments of the present invention provide a lookup table generation method and apparatus and a pre-compensation method and apparatus, so as to resolve a current problem that resources of an LUT increase exponentially with an increase in a length of a symbol sequence of the LUT. The method includes: dividing a first symbol sequence into two sub-symbol sequences, where symbols that are from the first symbol to a center symbol in the first symbol sequence form one sub-symbol sequence, and symbols that are from the center symbol to the last symbol in the first symbol sequence form the other sub-symbol sequence; performing statistical averaging on each sub-symbol sequence, and calculating a non-linear deviation value of the sub-symbol sequence according to a result of statistical averaging; correspondingly storing a sub-symbol sequence in which the center symbol is the last symbol and a non-linear deviation value of the sub-symbol sequence to form a first lookup table in a cascaded lookup table; and correspondingly storing a sub-symbol sequence in which the center symbol is the first symbol and a non-linear deviation value of the sub-symbol sequence to form a second lookup table in the cascaded lookup table.
摘要翻译：本发明实施例提供一种查找表生成方法，装置及预补偿方法及装置，以解决目前LUT资源随LUT符号序列长度增加呈指数增长的问题。该方法包括：将第一符号序列划分为两个子符号序列，其中第一符号序列中从第一符号到中心符号的符号形成一个子符号序列，以及从中心符号到第一符号序列中的最后一个符号形成另一个子符号序列; 对每个子符号序列进行统计平均，并根据统计平均结果计算子符号序列的非线性偏差值; 相应地存储中心符号为最后符号的子符号序列和子符号序列的非线性偏差值，以形成级联查找表中的第一查找表; 并相应地存储中心符号为第一符号的子符号序列和子符号序列的非线性偏差值，以在级联查找表中形成第二查找表。

6. 发明公开

EP3076568A4 METHOD FOR ELIMINATING NONLINEAR EFFECT, TRANSMITTER AND RECEIVER 有权
标题翻译： VERFAHREN ZUR ENTFERNUNG VON NICHTLINEARER WIRKUNG，SENDER UNDEMPFÄNGER
公开(公告)号：EP3076568A4
公开(公告)日：2017-07-19
申请号：EP14865284
申请日：2014-07-24
申请人： ZTE CORP
发明人： SHEN BAILIN
IPC分类号： H04B10/2543 , H04B10/2513 , H04B10/58 , H04B10/69
CPC分类号： H04B10/58 , H04B10/25137 , H04B10/2543 , H04B10/697 , H04B2210/254
摘要： The present disclosure discloses a method for eliminating nonlinear effects, a transmitter and a receiver. The method includes: setting signals to be transmitted and redundant signals, where the redundant signals are symmetrical to the signals, which are to be transmitted, about Y axis; and after the setting is completed, respectively executing dispersion pre-compensation on the signals to be transmitted and the redundant signals, and executing signal modulation after the dispersion pre-compensation is completed.
摘要翻译：本公开公开了一种消除非线性效应的方法，发射机和接收机。该方法包括：设置待发送的信号和关于Y轴的冗余信号，其中冗余信号与待发送的信号对称; 并在设置完成后，分别对待传输信号和冗余信号进行色散预补偿，并在色散预补偿完成后执行信号调制。

7. 发明授权

EP2993808B1 OPTICAL TRANSMISSION DEVICE, NONLINEAR DISTORTION COMPENSATION METHOD, AND NONLINEAR DISTORTION PRE-EQUALIZATION METHOD 有权
标题翻译：光传输设备，而不是线性失真补偿方法及VORENTZERRUNGSVERFAHREN非线性失真
公开(公告)号：EP2993808B1
公开(公告)日：2017-03-01
申请号：EP15181957.0
申请日：2015-08-21
申请人： FUJITSU LIMITED
发明人： Oyama, Tomofumi , Tanimura, Takahito , Hoshida, Takeshi , Nakashima, Hisao , Akiyama, Yuichi
IPC分类号： H04B10/58 , H04B10/61 , H04B10/69
CPC分类号： H04B10/58 , H04B10/25073 , H04B10/2543 , H04B10/616 , H04B10/6163 , H04B10/6971 , H04B2210/252 , H04B2210/254 , H04L25/03343

8. 发明公开

EP3130089A1 METHOD OF NON-LINEARITY COMPENSATION IN OPTICAL FIBRE COMMUNICATIONS 审中-公开
标题翻译：光纤通信中的非线性补偿方法
公开(公告)号：EP3130089A1
公开(公告)日：2017-02-15
申请号：EP15717598.5
申请日：2015-04-07
申请人： Aston University
发明人： LE, Son Thai , ELLIS, Andrew
IPC分类号： H04B10/2543 , H04B10/61 , H04B10/548
CPC分类号： H04B10/2543 , H04B10/548 , H04B10/6163 , H04B2210/252
摘要： A nonlinearity compensation technique for a CO-OFDM transmission system in which a proportion (e.g. up to 50%) of OFDM subcarriers is transmitted along with a phase-conjugate copy (PCP) on another subcarrier (replacing a data carrying subcarrier) to enable nonlinear distortion compensation. Nonlinear distortion experienced by closely spaced subcarriers in an OFDM system is highly correlated. The PCPs are used at the receiver to estimate the nonlinear distortion (e.g. nonlinear phase shift) of their respective original subcarriers and other subcarriers close to the PCP. With this technique, the optical fibre nonlinearity due to the Kerr effect in OFDM systems can be effectively compensated without the complexity of DBP or 50% loss in capacity of the phase conjugate twin wave (PC-TW) technique. Moreover, the technique proposed herein can be effectively implemented in both single polarization and PMD systems, in both single channel and WDM systems.
摘要翻译：一种用于CO-OFDM传输系统的非线性补偿技术，其中OFDM子载波的比例（例如高达50％）与另一子载波上的相位共轭副本（PCP）一起传输（替换承载数据的子载波）以实现非线性失真补偿。 OFDM系统中紧密间隔副载波所经历的非线性失真高度相关。在接收器处使用PCP来估计它们各自的原始副载波和靠近PCP的其他副载波的非线性失真（例如，非线性相移）。利用这种技术，可以有效地补偿由于OFDM系统中的克尔效应导致的光纤非线性，而没有DBP的复杂性或相位共轭双波（PC-TW）技术的容量损失50％。此外，本文提出的技术可以在单个偏振和PMD系统中在单通道和WDM系统中有效地实现。

9. 发明公开

EP3001583A1 Method of compensating chromatic dispersion and nonlinear impairments of an optical transmission path using digital backpropagation 审中-公开
标题翻译：用于通过数字反馈补偿装置的光传输链路的色散和非线性干扰的方法
公开(公告)号：EP3001583A1
公开(公告)日：2016-03-30
申请号：EP14306469.9
申请日：2014-09-24
申请人： ALCATEL LUCENT
发明人： Schuh, Karsten , Buchali, Fred
IPC分类号： H04B10/2513 , H04B10/2543 , H04B10/61
CPC分类号： H04B10/6163 , H04B10/2513 , H04B10/2543 , H04B10/6161
摘要： Proposed is a method of compensating chromatic dispersion and nonlinear impairments of an optical transmission path. The method comprises steps of deriving a digital electrical signal corresponding to a received optical transmission signal, determining from the derived electrical signal an overall amount of accumulated chromatic dispersion of the optical transmission path, and filtering the electrical signal, by alternating between filtering steps of a first type, which compensate for respective partial amounts of accumulated chromatic dispersion, and filtering steps of a second type, which compensate for respective partial amounts of nonlinear impairments.
摘要翻译：提议是补偿色散和光传输路径的非线性损伤的方法。所述方法包括导出从所导出的电信号的数字电信号对应于所接收的光传输信号的，确定性的开采到的累积色散的整体量的步骤光传输路径，并过滤该电信号，由第一类型，它compensate_for_errors累积色散的respectivement部分量，和第二类型，其中compensate_for_errors非线性损伤respectivement部分量的过滤步骤的过滤步骤之间交替。

10. 发明公开

EP2629471A3 Nonlinear Compensating Apparatus and Method and Transmitter 有权
标题翻译：非线性补偿装置和方法以及发射器
公开(公告)号：EP2629471A3
公开(公告)日：2015-11-04
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 , H04B10/2543
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.

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