Chinese Optics Letters, 2016, 14 (10): 100601, Published Online: Aug. 2, 2018
Carrier phase estimation scheme for faster-than-Nyquist optical coherent communication systems Download: 1161次
060.1660 Coherent communications 060.2330 Fiber optics communications 060.4510 Optical communications
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.
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.