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Proceedings Paper

Channel modeling for FSO communications and sensor networking inside structures
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Paper Abstract

Light finds a path from a source to a receiver even along a partially occluded channel, which may therefore involve diffuse and specular reflections to allow a signal to arrive at the receiver. Natural FSO channels often exist inside closed structures such as aircraft, satellites, and buildings. Direct, diffusely-reflected, and specularly-reflected paths can be analyzed to assess received intensities in various geometries, such as ducts, rooms, and multi-compartment structures. These calculations are important in choosing sensor network architectures for infrastructure sensing, determining impulse response to estimate usable channel bandwidth, and studying light leakage through openings in multicompartment structures. This presentation will describe both geometrical optics models for carrying out these analyses, as well as a "photon-kinetic-theory" technique for estimating light coupling from compartment to compartment in multicompartment structures connected by openings. The surface absorption and angular reflectance characteristics of surfaces are included in these analyses. Specific results for cylindrical ducts of various aspect ratios will be presented as well as for rectangular coupled compartments.

Paper Details

Date Published: 21 August 2009
PDF: 12 pages
Proc. SPIE 7464, Free-Space Laser Communications IX, 74640G (21 August 2009); doi: 10.1117/12.828127
Show Author Affiliations
Christopher C. Davis, Univ. of Maryland, College Park (United States)
Mohammed Eslami, Univ. of Maryland, College Park (United States)
Navik Agrawal, Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 7464:
Free-Space Laser Communications IX
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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