Analysis of a satellite communication channel: optical scintillations and fade statistics

Details Analysis of a satellite communication channel: optical scintillations and fade statistics Analysis of a satellite communication channel: optical scintillations and fade statistics

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2828..189p&link_type=abstract

Proc. SPIE Vol. 2828, p. 189-197, Image Propagation through the Atmosphere, J. C. Dainty; Luc R. Bissonnette; Eds.

Computer Science

Scientific paper

Estimates of the fractional fade time, expected number of fades, and mean duration of fade time associated with a transmitted Gaussian-beam wave are developed for uplink laser satellite-communication channels and compared with similar results based on a spherical wave model. Weak fluctuation theory using the lognormal model is applicable for zenith angles less than 60 degrees. Because spot size and off-axis scintillations are significant in the Gaussian- beam wave model but not for the spherical wave model, pointing errors become an important consideration in a reliable laser communication link. Off-axis scintillations increase even more rapidly for large diameter beams and can in some cases lead to a scintillation saturation for pointing errors greater than 1 (mu) rad off the optical beam axis.

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