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

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【Author】 Chengcheng Li;Dongwei Pan;Yiqiao Feng;Jiachuan Lin;Lixia Xi;Xianfeng Tang;Wenbo Zhang;Xiaoguang Zhang;State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications;School of Science,Beijing University of Posts and Telecommunications;

【机构】 State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications； School of Science,Beijing University of Posts and Telecommunications；

【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 polarizationdivision 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.更多还原

【Abstract】 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 polarizationdivision 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.更多还原

【关键词】 coherent； faster； Viterbi； Nyquist； quadrature； accumulated； overcome； Carrier； sliding； challenge；

【基金】 supported by the National Natural Science Foundation of China(Nos.61571057,61527820,and 61575082);the Open Fund of the Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications(Jinan University)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2016年10期

【分类号】TN929.1
【被引频次】2
【下载频次】46

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