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Title: Nonlinear phase noise tolerance for coherent optical systems using soft-decision-aided ML carrier phase estimation enhanced with constellation partitioning
Authors: Li, Y
Wu, M
Du, X
Xu, Z
Gurusamy, M
Yu, C 
Kam, PY
Keywords: Coherent optical systems
Constellation partitioning
Nonlinear phase noise
Issue Date: 2018
Publisher: Elsevier
Source: Optics communications, 2018, v. 409, p. 45-51 How to cite?
Journal: Optics communications 
Abstract: A novel soft-decision-aided maximum likelihood (SDA-ML) carrier phase estimation method and its simplified version, the decision-aided and soft-decision-aided maximum likelihood (DA-SDA-ML) methods are tested in a nonlinear phase noise-dominant channel. The numerical performance results show that both the SDA-ML and DA-SDA-ML methods outperform the conventional DA-ML in systems with constant-amplitude modulation formats. In addition, modified algorithms based on constellation partitioning are proposed. With partitioning, the modified SDA-ML and DA-SDA-ML are shown to be useful for compensating the nonlinear phase noise in multi-level modulation systems.
ISSN: 0030-4018
EISSN: 1873-0310
DOI: 10.1016/j.optcom.2017.06.098
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