公开(公告)号：EP2828990A4

公开(公告)日：2015-04-22

申请号：EP13764765

申请日：2013-03-19

申请人： HUAWEI TECH CO LTD

发明人： LI CHUANDONG ,  ZHANG ZHUHONG ,  ZHU FEI ,  BAI YUSHENG

IPC分类号： H04B10/61

CPC分类号： H04B10/6162

摘要： An apparatus and method for performing joint equalization and timing recovery in coherent optical systems. The method includes equalizing signals to generate compensated polarization signals, wherein timing error in a distorted optical signal is calculated based on one of the compensated polarization signals. The method further includes performing resampling polarization signals to correct timing offset in an optical signal based on the calculated timing error. The calculated timing error may also be used to adaptively control one or more operating parameters of an external device.

摘要翻译： 用于相干光学系统进行联合均衡和定时恢复的装置和方法。 该方法包括：均衡信号，以产生经补偿的信号极化，worin定时误差失真的光信号是基于所述经补偿的偏振信号中的一个来计算。 该方法包括：执行重采样此外偏振信号，以校正在定时基于计算出的定时误差光信号偏移英寸 因此可以用于将计算出的定时误差以自适应地控制外部装置的一个或多个操作参数。

公开(公告)号：EP2856669A1

公开(公告)日：2015-04-08

申请号：EP13725869.5

申请日：2013-05-17

申请人： Cisco Technology, Inc.

发明人： GEYER, Jonas ,  BISPLINGHOFF, Andreas ,  KUPFER, Theodor

IPC分类号： H04B10/61

CPC分类号： H04B10/6165

摘要： Carrier phase estimation techniques are provided for processing a received optical signal having a carrier modulated according to a modulation scheme. First and second carrier phase estimation operations are performed on a digital signal derived from an optical carrier obtained from the received optical signal using coherent optical reception. The first carrier phase estimation operation tracks relatively fast phase variations of the optical carrier of the received optical signal to produce a first carrier phase estimation and the second carrier phase estimation operation tracks relatively slow phase variations of the optical carrier of the received optical signal to produce a second carrier phase estimation. A difference between the first and second carrier phase estimations is computed. Occurrence of a cycle slip is determined when the difference is greater than a threshold. A correction is applied to the first carrier phase estimation when the low pass filtered difference exceeds the threshold.

公开(公告)号：EP2406900A4

公开(公告)日：2015-04-01

申请号：EP10751232

申请日：2010-03-08

申请人： TYCO ELECTRONICS SUBSEA COMM

发明人： CAI YI

IPC分类号： H04B10/61 ,  H04L27/22

CPC分类号： H04B10/61 ,  H04B10/611 ,  H04B10/612 ,  H04B10/614 ,  H04B10/6162 ,  H04B10/6164 ,  H04B10/6165 ,  H04L27/223

公开(公告)号：EP2833554A1

公开(公告)日：2015-02-04

申请号：EP13306105.1

申请日：2013-07-31

申请人： ALCATEL LUCENT

发明人： Schmalen, Laurent ,  Pepe, Marianna

IPC分类号： H03M13/11 ,  H03M13/25 ,  H04B10/61 ,  H04L1/00 ,  H03M13/00

CPC分类号： H03M13/1168 ,  H03M13/255 ,  H03M13/616 ,  H03M13/6516 ,  H04B10/613 ,  H04L1/005 ,  H04L1/0055 ,  H04L1/0057

摘要： Some embodiments relate to an encoder (830) comprising a differential encoder (810) operable to provide a differentially encoded signal (811) based on an input signal (105) and a differential encoding rule; and an LDPC encoder (806) operable to provide an LDPC encoded signal (807) based on the differentially encoded signal (811) and based on an LDPC encoding rule corresponding to an M'S × N'S parity check matrix ( H ') comprising a plurality of S × S permutation sub-matrices with an even number of non-zero entries in each row of an S × S sub-matrix. Further embodiments relate to a decoder (840) comprising an LDPC decoder (822) operable to provide an output signal (823) based on an input signal (821) and based on an LDPC decoding rule corresponding to an M'S × N'S parity check matrix ( H ') comprising a plurality of S × S permutation sub-matrices with an even number of non-zero entries in each row of an S × S sub-matrix; and a differential decoder (818) operable to provide a decoded signal (819) based on the output signal (823) from the LDPC decoder (822) and a differential decoding rule.

摘要翻译： 一些实施例涉及包括差分编码器（810）的编码器（830），差分编码器可操作以基于输入信号（105）和差分编码规则提供差分编码信号（811） 以及LDPC编码器（806），其可操作以基于所述差分编码信号（811）提供LDPC编码信号（807），并且基于对应于包括多个编码信号的M'S×N'S奇偶校验矩阵（H'）的LDPC编码规则 S×S子矩阵的每一行中具有偶数个非零项的S×S置换子矩阵。 另外的实施例涉及一种包括LDPC解码器（822）的解码器（840），其可操作以基于输入信号（821）提供输出信号（823），并且基于对应于M'S×N奇偶校验矩阵的LDPC解码规则 H'）包括在S×S子矩阵的每一行中具有偶数个非零条目的多个S×S置换子矩阵; 以及差分解码器（818），其可操作以基于来自LDPC解码器（822）的输出信号（823）和差分解码规则提供解码信号（819）。

公开(公告)号：EP2828990A1

公开(公告)日：2015-01-28

申请号：EP13764765.7

申请日：2013-03-19

申请人： Huawei Technologies Co., Ltd.

发明人： LI, Chuandong ,  ZHANG, Zhuhong ,  ZHU, Fei ,  BAI, YuSheng

IPC分类号： H04B10/61

CPC分类号： H04B10/6162

摘要： An apparatus and method for performing joint equalization and timing recovery in coherent optical systems. The method includes equalizing signals to generate compensated polarization signals, wherein timing error in a distorted optical signal is calculated based on one of the compensated polarization signals. The method further includes performing resampling polarization signals to correct timing offset in an optical signal based on the calculated timing error. The calculated timing error may also be used to adaptively control one or more operating parameters of an external device.

公开(公告)号：EP2707973A4

公开(公告)日：2015-01-14

申请号：EP12783054

申请日：2012-05-10

申请人： ALCATEL LUCENT

发明人： HOUTSMA VINCENT E ,  WEIMANN NILS G

IPC分类号： H04B10/61 ,  H04B10/63 ,  H04B10/64

CPC分类号： H04B10/63 ,  H04B10/611 ,  H04B10/613 ,  H04B10/6164 ,  H04B10/6165 ,  H04B10/64

公开(公告)号：EP2810415A1

公开(公告)日：2014-12-10

申请号：EP13704643.9

申请日：2013-01-16

申请人： Tyco Electronics Subsea Communications LLC

发明人： ZHANG, Hongbin ,  SINKIN, Oleg

IPC分类号： H04L25/03 ,  H04B10/61 ,  H04L27/22 ,  H04L27/227

CPC分类号： H04L27/223 ,  H04B10/614 ,  H04B10/6161 ,  H04B10/6162 ,  H04B10/6166 ,  H04L25/03038 ,  H04L27/227 ,  H04L2025/03401 ,  H04L2025/03477 ,  H04L2025/03617 ,  H04L2025/03707

摘要： A system and method for polarization de-multiplexing in a coherent optical receiver. De-multiplexing is achieved using a modified constant modulus algorithm (CMA) wherein filter coefficients are determined as a function of a coupling coefficient to avoid convergence of the CMA outputs.

公开(公告)号：EP2806584A1

公开(公告)日：2014-11-26

申请号：EP13305677.0

申请日：2013-05-24

申请人： ALCATEL LUCENT

发明人： Razzetti, Luca Gabriele ,  Gavioli, Giancarlo ,  Pepe, Marianna ,  Costantini, Carlo

IPC分类号： H04B10/61 ,  H04L27/00

摘要： Embodiments relate to an apparatus (100; 300; 400; 500; 600) for recovering a phase of a received signal (S in ) carrying pilot and information symbols, wherein the received signal has been transmitted over a communication channel (200), the apparatus comprising a phase estimator (110) operable to determine a phase estimate (115) of a phase of the communication channel using the received signal, wherein the phase estimator (110) commits a phase slip with a phase slip probability (P S , P T ) depending on the communication channel (200); a demodulator (120) operable to determine demodulated pilot and information symbols (125) based on a coherent reception of the received pilot and information symbols using the determined phase estimate (115); a phase slip detector (130; 330; 430; 530; 630) operable to detect the phase slip based on a phase difference between at least one demodulated pilot symbol and at least one corresponding transmitted pilot symbol; and a phase corrector (140; 340; 440; 540) operable to correct a phase of demodulated information symbols based on the detected phase slip.

摘要翻译： 实施例涉及在设备（100; 300; 400; 500; 600）用于回收携带导频和信息符号，worin所接收的信号的接收信号（S）的相位已经反mitted通过通信信道（200），所述 装置使用接收到的信号包括所述通信信道的相位的相位估计器（110），可操作以确定矿相位估计（115），worin相位估计器（110）款具有相位滑移概率相位滑移（PS，PT） 取决于通信信道（200）上; 解调器（120）可操作以基于使用所述确定性开采相位估计（115）所述接收的导频和信息符号的相干接收确定性矿解调的导频和信息码元（125）; 相位检测器滑移（130; 330; 430; 530; 630）可操作以基于至少一个解调导频码元和至少一个相应的反式mitted导频码元之间的相位差来检测相位滑移; 和相位校正器（140; 340; 440; 540），其可操作来校正基于检测到的相位滑移解调信息符号的相位。

公开(公告)号：EP2499475B1

公开(公告)日：2014-10-15

申请号：EP10830280.3

申请日：2010-11-11

申请人： SP Sveriges Tekniska Forskningsinstitut AB

发明人： HEDEKVIST, Per Olof ,  EBENHAG, Sven-Christian

IPC分类号： G01J7/00 ,  G01M11/00 ,  H04B10/61 ,  H04B10/63

CPC分类号： H04L7/0075 ,  H04B10/6161 ,  H04B10/63

公开(公告)号：EP2784962A1

公开(公告)日：2014-10-01

申请号：EP13305395.9

申请日：2013-03-28

申请人： ALCATEL LUCENT

发明人： Rival, Olivier ,  Morea, Annalisa ,  Ghazisaeidi, Amirhossein

IPC分类号： H04J14/06 ,  H04B10/61

CPC分类号： H04J14/06 ,  H04B10/613 ,  H04B10/614 ,  H04B10/6166

摘要： Proposed is a method of receiving a phase-modulated polarization division multiplexed (PDM) optical signal. A first digital signal and a second digital signal are derived from the optical signal, representing respective complex values of respective, orthogonal polarization states.
Polarization division demultiplexing is performed, using a set of FIR filters of K filter coefficients. Within a first time interval, the sets of filter coefficients are updated for different discrete time instances, using a first algorithm to achieve PDM demultiplexing with regard to a first phase-modulation method. Within a second time interval, the sets of filter coefficients are kept fixed. Within a third time interval, the sets of filter coefficients are updated for different discrete time instances, using a second algorithm which achieves PDM demultiplexing with regard to a second phase-modulation method different from the first phase-modulation method.

摘要翻译： 提出了一种接收相位调制偏振复用（PDM）光信号的方法。 从光信号导出第一数字信号和第二数字信号，表示相应的正交极化状态的相应复数值。 使用K个滤波器系数的一组FIR滤波器来执行极化分解解复用。 在第一时间间隔内，针对不同的离散时间实例对滤波器系数集合进行更新，使用第一种算法来实现关于第一相位调制方法的PDM解复用。 在第二时间间隔内，滤波器系数的集合被保持固定。 在第三时间间隔内，使用相对于与第一相位调制方法不同的第二相位调制方法实现PDM解复用的第二算法，为不同的离散时间实例更新滤波器系数集合。