Multi-beam space-time coded systems for optical atmospheric channels

Jaime A. Anguita, Mark A. Neifeld, Bane V. Vasic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations


We consider a terrestrial free-space optical communication link affected by atmospheric turbulence. By means of numerical simulations we estimate the reduction in scintillation achieved by the combined effect of aperture averaging and four transmitters when mutually-incoherent sources and a realistic detector size are used. We evaluate two space-time coding schemes: the first scheme uses a repetition code operating on four transmitters, and the second scheme uses a size-four rate-one space-time block code, originally proposed for wireless radio-frequency links. Both schemes deliver large signal-to-noise ratio gains compare to a single-beam system. The first scheme gives the best performance in all cases because of the natural incoherence found among optical sources.

Original languageEnglish (US)
Title of host publicationFree-Space Laser Communications VI
StatePublished - 2006
EventFree-Space Laser Communications VI - San Diego, CA, United States
Duration: Aug 15 2006Aug 17 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherFree-Space Laser Communications VI
Country/TerritoryUnited States
CitySan Diego, CA


  • Atmospheric turbulence
  • Free-space optical communication
  • Laser communication
  • Multiple-input multiple-output
  • Multiple-input single-output
  • Space-time codes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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