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

Hongyu Zhang, Pooi Yuen Kam, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)9302-9311
Number of pages10
JournalOptics Express
Issue number8
Publication statusPublished - 9 Apr 2012
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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