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Proceedings Paper

Multi-beam space-time coded systems for optical atmospheric channels
Author(s): Jaime A. Anguita; Mark A. Neifeld; Bane V. Vasic
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Paper Abstract

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.

Paper Details

Date Published: 1 September 2006
PDF: 9 pages
Proc. SPIE 6304, Free-Space Laser Communications VI, 63041B (1 September 2006); doi: 10.1117/12.681488
Show Author Affiliations
Jaime A. Anguita, Univ. of Arizona (United States)
Mark A. Neifeld, Univ. of Arizona (United States)
Bane V. Vasic, Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 6304:
Free-Space Laser Communications VI
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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