PERFORMANCE OF FREE SPACE OPTICAL COHERENT COMMUNICATION WITH DECISION-AIDED CARRIER PHASE ESTIMATION

被引：0
|
作者：
Liu, Xue [1 ]
Chen, Jian [1 ]
Zhang, Shuchao [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Sch InfoComm Engn, Nanjing 210003, Jiangsu, Peoples R China
来源：
2015 14TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS AND NETWORKS (ICOCN) | 2015年
关键词：
coherent free space optical; atmospheric turbulence; decision-aided maximum likelihood phase estimation;
D O I：
暂无
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：
The performance of free space optical coherent communication with phase modulation is limited by both phase fluctuations and intensity scintillations induced by atmospheric turbulence. In this paper, we consider the effects of Gaussian phase fluctuations and Gamma-Gamma amplitude fluctuations, in addition to photodiode shot noise. Given temporal correlation of phase variations, decision-aided, maximum likelihood (DA-ML) phase estimator is employed in free space optical coherent communication system to improve system performance. Monte Carlo simulation results show that turbulent phase noise can be ignored with less than 0.1 dB signal-to-noise ratio penalty compared with no turbulence by using this phase estimation scheme. And intensity scintillations are the dominant impairment.
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页数：3
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