Paper Info
Title
Low complexity carrier phase estimation for m-QAM optical communication systems
Abstract
A low complexity carrier phase estimation (CPE) algorithm for M-ary quadrature amplitude modulation (m-QAM) optical communication systems is investigated in this paper. In the proposed CPE algorithm, a two-stage CPE method is adopted. In the first stage, the QPSK points of the constellation are picked out to achieve a coarse phase estimation using the traditional Viterbi and Viterbi algorithm. In the second stage, all the points of the constellation are used for a fine phase estimation. In addition, the fourth-power operation is replaced by the 4-level absolute operation for the removal of modulated data phase, which greatly reduced the complexity. The proposed method was investigated through simulation, with 16-QAM, 32-QAM and 64-QAM modulation formats, respectively. The simulation results show that the proposed algorithm has both good linewidth tolerance and amplified spontaneous emission noise tolerance as well as low complexity. Moreover, when the equalization enhanced phase noise is considered, the proposed method also has better performance than traditional algorithm.
Year
DOI
Venue
2019
10.1007/s11107-019-00833-3
Photonic Network Communications
Keywords
Field
DocType
Coherent optical communication, Carrier phase estimation, m-QAM
Quadrature amplitude modulation,Equalization (audio),Laser linewidth,Optical communication,Computer science,Algorithm,Phase noise,Modulation,Viterbi algorithm,Phase-shift keying,Distributed computing
Journal
Volume
Issue
ISSN
38
1
1387-974X
Citations 
PageRank 
References 
0
0.34
0
Authors
5
Name
Order
Citations
PageRank
Yuan Li14131.36
Qiang Zheng2283.61
Yao Xie300.34
Jilong Han400.68
W. Li5196.15