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.

引用

页数：5

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