Maximum likelihood sequence detection in laser phase noise-impaired coherent optical systems

Xuguang Shao, Pooi Yuen Kam, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


A maximum likelihood sequence detection (MLSD) receiver is used to detect data sequences in single-carrier coherent optical systems in the presence of laser phase noise. It requires no explicit phase estimation and involves only linear operations. It consistently shows improvement in the OSNR penalty (e.g., 1.1 dB at BER = 10 -4 with memory length L =3) and the laser linewidth tolerance (e.g., around 4 times that of DAML at 1dB OSNR penalty at BER = 10 -4 with memory length L =3) over the wellknown DAML and Mth power approaches in laser phase noise (LPN)- impaired coherent optical systems.
Original languageEnglish
Pages (from-to)22600-22606
Number of pages7
JournalOptics Express
Issue number23
Publication statusPublished - 7 Nov 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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