Time-Domain Maximum-Likelihood Channel Estimation for PDM CO-OFDM Systems

被引：19
|
作者：
Fang, Xi [1 ]
Yang, Chuanchuan [1 ]
Zhang, Fan [1 ]
机构：
[1] Peking Univ, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2013年 / 25卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Coherent communication; channel estimation; optical communication; orthogonal frequency-division-multiplexing (OFDM);
D O I：
10.1109/LPT.2013.2245887
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：
We propose an efficient channel estimation method based on time-domain maximum likelihood (TDML) algorithm for polarization-division-multiplexed coherent optical orthogonal frequency-division-multiplexing (CO-OFDM) systems. Compared with the conventional channel estimation approach, although with overhead reduction, TDML demonstrates similar system robustness against transmission impairments, such as optical noise, chromatic dispersion, and polarization-mode dispersion. More importantly, TDML demonstrates enhanced tolerance against laser phase noise. The theoretical analysis is validated by numerical simulation of quadrature-phase-shift-keying CO-OFDM system.
引用
收藏
页码：619 / 622
页数：4
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