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
收藏
页码：486 / 489
页数：4
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