Adaptive maximum likelihood sequence detection for QPSK coherent optical communication system

Zhuoran Xu, Pooi Yuen Kam, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)


A novel Viterbi-type adaptive maximum likelihood sequence detection algorithm is developed and investigated in coherent optical communication systems in the presence of both laser phase noise and nonlinear phase noise. Compared with the nonadaptive version, it can self-adjust the effective memory length of the phase estimator and automatically deliver the optimum bit-error rate performance without requiring any prior statistical knowledge of the optical channel. The phase error variance of the estimator is also analytically investigated.
Original languageEnglish
Article number6716029
Pages (from-to)583-586
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number6
Publication statusPublished - 15 Mar 2014
Externally publishedYes


  • Carrier phase estimation
  • coherent detection
  • nonlinear compensation
  • nonlinear phase noise
  • sequence detection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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