Threshold-based multiple optical signal selection scheme for free-space optical wavelength division multiplexing systems

Sung Sik Nam, Mohamed Slim Alouini, Lin Zhang, Young-Chai Ko

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We propose a threshold-based multiple optical signal selection scheme (TMOS) for free-space optical wavelength division multiplexing systems. With this scheme, we can obtain higher spectral efficiency while reducing the possible complexity of implementation caused by the beam-selection scheme and without a considerable performance loss. To characterize the performance of our scheme, we statistically analyze the operation characteristics under conventional detection conditions (i.e., heterodyne detection and intensity modulation/direct detection techniques) with log-normal turbulence while taking into consideration the impact of pointing error. More specifically, we derive exact closed-form expressions for the outage probability, the average bit error rate, and the average spectral efficiency while adopting an adaptive modulation. Some selected results show that TMOS increases the average spectral efficiency while maintaining a minimum average bit error rate requirement.

Original languageEnglish
Pages (from-to)1085-1096
Number of pages12
JournalJournal of Optical Communications and Networking
Volume9
Issue number12
DOIs
Publication statusPublished - 2017 Dec 1

Keywords

  • Free-space optical communication
  • Heterodyne detection
  • Intensity modulation/direct detection
  • Log-normal turbulence
  • Wavelength division multiplexing

ASJC Scopus subject areas

  • Computer Networks and Communications

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