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Proceedings Paper

Experimental performance evaluation of non-line-of-sight ultraviolet communication systems
Author(s): Zhengyuan Xu; Gang Chen; Feras Abou-Galala; Michael Leonardi
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Paper Abstract

Motivated by rapid advances in solar blind ultraviolet (UV) light emitting diodes (LEDs), filters and photomultiplier tubes (PMTs), together with unique UV atmospheric propagation characteristics, a non-line-of-sight (NLOS) UV communication test-bed has been recently built and utilized for extensive experimental evaluation of performance of NLOS UV links in outdoor environments. Towards this end, key link components are first characterized and their limitations are identified. The tradeoffs among communication range, received number of photons, and bit-error-rate are revealed via field measurement results. Wavelength diversity is achieved by utilizing combinations of sources and detectors centered at different wavelengths in the solar blind band. It is demonstrated that signals can be reliably transmitted to their destinations of dozens of meters away through an NLOS channel. Although all reported results in this paper are based on open field experiments, it is found that reflections from surrounding objects such as trees and buildings can enhance the received signal strength, up to an order of magnitude increase in the received number of photons in some cases, thus significantly improving link performance.

Paper Details

Date Published: 25 September 2007
PDF: 12 pages
Proc. SPIE 6709, Free-Space Laser Communications VII, 67090Y (25 September 2007); doi: 10.1117/12.735183
Show Author Affiliations
Zhengyuan Xu, Univ. of California, Riverside (United States)
Gang Chen, Univ. of California, Riverside (United States)
Feras Abou-Galala, Univ. of California, Riverside (United States)
Michael Leonardi, Univ. of California, Riverside (United States)

Published in SPIE Proceedings Vol. 6709:
Free-Space Laser Communications VII
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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