Impact of Sinusoidal Tones on Parallel Decision-Directed Phase Recovery for 64-QAM

被引：5

作者：

Ng, Wing-Chau ^{[1
]}

Nguyen, An T. ^{[1
]}

Ayotte, Simon ^{[2
]}

Park, Chul-Soo ^{[1
]}

Rusch, Leslie A. ^{[1
]}

机构：

[1] Univ Laval, Dept Elect & Comp Engn, COPL, Quebec City, PQ G1V 0A6, Canada

[2] TeraXion, Quebec City, PQ G1P 4S8, Canada

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

64-QAM; coherent detection; phase recovery; LASER LINEWIDTH TOLERANCE; TRANSMISSION; QAM;

D O I：

10.1109/LPT.2013.2297708

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Coherent optical communications at Gbaud rates require parallelization in digital signal processing, however the feedback delay introduced by pipelining challenges phase recovery. Parallelized phase recovery creates a greater sensitivity to residual frequency offset induced by the presence of sinusoidal tones in the source. We experimentally investigate the impact of sinusoidal laser phase noise on parallel decision-directed phase recovery in a 5 Gb 64-quadrature amplitude modulation system, including the effects of frequency offset compensation and equalization.

引用

页码：486 / 489

页数：4