Optical orbital angular momentum for secure and power efficient point-to-point FSO communications

Mohammed Alfowzan, Mehrdad Khatami, Bane Vasic

Research output: Contribution to journalConference articlepeer-review


We address the problem of detection in orbital angular momentum (OAM). The focus of our analysis will be on the power efficient Q-ary Pulse Position Modulation (Q - PPM). Free space optical signals sent through wireless channels are degraded by atmospheric turbulence. In this paper a novel detection approach based on a factor graph representation of OAM Q-PPM signalling is presented to equalize for the crosstalk among orbital angular momentum vortices. It will be shown that our proposed detection algorithm significantly outperforms the separate detection scenario in terms of error rate performance.

Original languageEnglish (US)
JournalProceedings of the International Telemetering Conference
StatePublished - 2013
EventITC/USA 2013: 49th Annual International Telemetering Conference and Technical Exhibition - Meeting all the Challenges of Telemetry, 2013 - Las Vegas,NV, United States
Duration: Oct 21 2013Oct 24 2013


  • Channel crosstalk
  • Free-space optical communication
  • Orbital angular momentum
  • Turbulent channels

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation
  • Computer Networks and Communications
  • Signal Processing


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