Pilot-assisted decision-aided maximum-likelihood phase estimation in coherent optical phase-modulated systems with nonlinear phase noise

Shaoliang Zhang, Xiaojing Li, Pooi Yuen Kam, Changyuan Yu, Jian Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)


We proposed pilot-assisted (PA) decision-aided maximum-likelihood (DA ML) phase estimation for coherent optical M-ary phase-shift-keying systems. In a nonlinear-phase-noise channel with laser phase noise, the required launched power at bit-error-rate (BER) =10-4using the proposed PA DA ML algorithm without differential encoding (DE) can be reduced by about 0.7 dB in quadrature phase-shift keying and eight-phase-shift keying systems, and about 0.4 dB in 16-quadrature amplitude modulation format, compared to their DE counterparts using DA ML.
Original languageEnglish
Article number5378559
Pages (from-to)380-382
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number6
Publication statusPublished - 15 Mar 2010
Externally publishedYes


  • Coherent detection
  • Decision-aided maximum-likelihood (DA ML)
  • Differential encoding (DE)
  • Laser phase noise
  • M-ary PSK
  • Nonlinear phase noise (NLPN)
  • Phase estimation (PE)
  • Pilot symbols

ASJC Scopus subject areas

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

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