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

Chengcheng Li; Dongwei Pan; Yiqiao Feng; Jiachuan Lin; Lixia Xi; Xianfeng Tang; Wenbo Zhang; Xiaoguang Zhang

doi:10.3788/COL201614.100601

Journals >Chinese Optics Letters >Volume 14 >Issue 10 >Page 100601 > Article

Chinese Optics Letters
Vol. 14, Issue 10, 100601 (2016)

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

Chengcheng Li¹, Dongwei Pan¹, Yiqiao Feng¹, Jiachuan Lin¹, Lixia Xi¹, Xianfeng Tang¹, Wenbo Zhang², and Xiaoguang Zhang^1、*

Author Affiliations

¹State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

²School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

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DOI: 10.3788/COL201614.100601 Cite this Article Set citation alerts

Chengcheng Li, Dongwei Pan, Yiqiao Feng, Jiachuan Lin, Lixia Xi, Xianfeng Tang, Wenbo Zhang, Xiaoguang Zhang. Carrier phase estimation scheme for faster-than-Nyquist optical coherent communication systems[J]. Chinese Optics Letters, 2016, 14(10): 100601 Copy Citation Text

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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 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.