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

页码：1353 / 1357

页数：5

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