Nonlinearity and Phase Noise Mitigation Using Feed-forward Carrier Phase Estimation and Digital Backward Propagation in Coherent QAM Transmission

被引：3
作者：
Pakala, Lalitha [1 ,2 ,3 ]
Schmauss, Bernhard [1 ,2 ,3 ]
机构：
[1] Friedrich Alexander Univ Erlangen Nurnberg, Inst Microwaves & Photon LHFT, Cauerstr 9, D-91058 Erlangen, Germany
[2] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Grad Sch Adv Opt Technol SAOT, D-91052 Erlangen, Germany
[3] Friedrich Alexander Univ Erlangen Nurnberg, Grad Study Grp Fiber Opt Transmiss & Sensing FiTS, D-91058 Erlangen, Germany
来源：
8TH INTERNATIONAL CONFERENCE ON LASER ASSISTED NET SHAPE ENGINEERING (LANE 2014) | 2014年 / 56卷
基金：
美国国家科学基金会;
关键词：
Digital backward propagation; carrier phase estimation; coherent systems; QAM; nonlinearity; phase noise; COMPENSATION; RECOVERY;
D O I：
10.1016/j.phpro.2014.08.062
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We numerically investigate the performance of Viterbi-Viterbi (VV) carrier phase estimation (CPE) and feed-forward decision directed (DD) CPE along with digital backward propagation (DBP) to mitigate laser phase noise, linear and nonlinear fiber impairments for polarization multiplexed (PM) 4 and 16-ary quadrature amplitude modulation (QAM) coherent systems. For 16-QAM, DD-CPE is compared with quadrature phase shift keying (QPSK) partitioning method that is based on the modification of VV-CPE. When the laser phase noise is negligible, both CPE methods exhibit a similar performance when employed after DBP. However, in the presence of phase noise, non-decision directed VV-CPE (for 4-QAM) and QPSK partitioning (for 16-QAM) methods outperform DD-CPE with greater phase noise tolerance and reduced complexity. (C) 2014 Published by Elsevier B.V.
引用
收藏
页码：1353 / 1357
页数：5
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