• DocumentCode
    902395
  • Title

    Laser Linewidth Tolerance of Decision-Aided Maximum Likelihood Phase Estimation in Coherent Optical M -ary PSK and QAM Systems

  • Author

    Zhang, S. ; Kam, P.Y. ; Yu, C. ; Chen, J.

  • Author_Institution
    Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
  • Volume
    21
  • Issue
    15
  • fYear
    2009
  • Firstpage
    1075
  • Lastpage
    1077
  • Abstract
    This letter extends the decision-aided (DA) maximum likelihood (ML) phase estimation in an M -ary phase-shift keying (PSK) system to quadrature amplitude modulation (QAM) signals. The block length effect is simulated for both M-ary PSK and QAM systems, and also investigated in M -ary PSK systems through analysis. Our results show that the tolerance of DA ML to laser linewidth for square 16-QAM can be increased by >10 times compared to the block Mth power scheme.
  • Keywords
    maximum likelihood estimation; optical fibre communication; optical modulation; phase estimation; phase shift keying; quadrature amplitude modulation; QAM system; coherent optical M-ary PSK; decision-aided ML phase estimation; laser linewidth tolerance analysis; maximum likelihood phase estimation; phase-shift keying system; quadrature amplitude modulation; Coherent detection; optical fiber communication;
  • fLanguage
    English
  • Journal_Title
    Photonics Technology Letters, IEEE
  • Publisher
    ieee
  • ISSN
    1041-1135
  • Type

    jour

  • DOI
    10.1109/LPT.2009.2022750
  • Filename
    4957008
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=902395