Performance improvement of OOK free-space optical communication systems by coherent detection and dynamic decision threshold in atmospheric turbulence conditions

Zixiong Wang, Wen De Zhong, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


In this letter, we analyze the performance improvement of on-off-keying free-space optical communication systems in atmospheric turbulence conditions due to coherent detection and the dynamic decision threshold (DDT) scheme. Our analytical results show that the DDT scheme provides a 5.7-dB power reduction for achieving a bit error rate of 10-3compared with the conventional fixed decision threshold scheme. In addition, the improvement achieved by the DDT scheme is related to the strength of amplitude and phase fluctuations, not to the power of the local oscillator.
Original languageEnglish
Article number6301682
Pages (from-to)2035-2037
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number22
Publication statusPublished - 26 Nov 2012
Externally publishedYes


  • Atmospheric turbulence
  • coherent detection
  • dynamic decision threshold
  • free-space optical (FSO)

ASJC Scopus subject areas

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

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