Carrier phase estimation scheme for faster-than-Nyquist optical coherent communication systems

被引：4
|
作者：
Li, Chengcheng [1 ]
Pan, Dongwei [1 ]
Feng, Yiqiao [1 ]
Lin, Jiachuan [1 ]
Xi, Lixia [1 ]
Tang, Xianfeng [1 ]
Zhang, Wenbo [2 ]
Zhang, Xiaoguang [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2016年 / 14卷 / 10期
基金：
中国国家自然科学基金;
关键词：
TIME-FREQUENCY PACKING; M-QAM; SPECTRAL EFFICIENCY; RECOVERY;
D O I：
10.3788/COL201614.100601
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a modified-Viterbi and Viterbi phase estimation ( VVPE) carrier phase recovery scheme that shows an effective capability of reducing the frequent and accumulated cycle slips induced by inter-symbol interference ( ISI) in a faster-than-Nyquist ( FTN) optical coherent communications system. In a 28-Gbaud FTN polarization-division multiplexed quadrature phase-shift keying optical communication system, the comparison of the proposed modified-VVPE scheme and the conventional VVPE scheme is carried out. It is proved that the proposed modified-VVPE scheme can effectively overcome the challenge of ISI induced error carrier phase estimation, which leads to a better bit error ratio performance.
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页数：5
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