Performance analysis of coherent optical 8-star QAM systems using decision-aided maximum likelihood phase estimation | Zendy

Hongyu Zhang | Zendy; PooiYuen Kam | Zendy; Changyuan Yu | Zendy

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Performance analysis of coherent optical 8-star QAM systems using decision-aided maximum likelihood phase estimation

Author(s) -

Hongyu Zhang,

PooiYuen Kam,

Changyuan Yu

Publication year - 2012

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.009302

Subject(s) - quadrature amplitude modulation , laser linewidth , bit error rate , phase shift keying , optics , monte carlo method , quadrature (astronomy) , phase modulation , qam , computer science , star (game theory) , physics , algorithm , phase noise , mathematics , laser , statistics , decoding methods , astrophysics

An approximate bit-error rate (BER) expression of 8-star quadrature amplitude modulation (QAM) in the presence of a phase estimation error is derived. The accuracy of the approximate BER is verified via numerical integration of the conditional BER and the Monte-Carlo (MC) simulations. This approximation allows quick estimation of the BER performance and prediction of laser linewidth tolerance, and also facilitates optimization of the ring ratio.

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