Low-complexity carrier phase recovery for square M-QAM based on S-BPS algorithm

Xian Zhou, Chao Lu, Pak Tao Lau, Keping Long

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


Minimum distance blind phase search (BPS) algorithm has good tolerance to laser linewidth but with high computational complexity. In this letter, a novel substitution algorithm, i.e., symmetry BPS (S-BPS) is proposed for arbitrary square M-ary quadrature amplitude modulation (M-QAM) coherent optical systems. Based on the symmetry of square M-QAM, it can reduce the complexity directly by simplifying the phase error detection in the real plane and without multiplication. Taking square 4-QAM, 16-QAM, and 64-QAM as examples, the effectiveness of the proposed S-BPS algorithm is demonstrated by numerical simulations.
Original languageEnglish
Article number6846279
Pages (from-to)1863-1866
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number18
Publication statusPublished - 15 Sept 2014


  • Carrier phase recovery
  • Coherent optical system
  • Quadrature amplitude modulation (QAM)

ASJC Scopus subject areas

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


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