Open AccessThreshold detection in an on–off binary communications channel with atmospheric scintillation
Author(s) -
W. E. Webb,
Joseph T. Marino
Publication year - 1975
Publication title -
applied optics
Language(s) - English
Resource type - Journals
ISSN - 0003-6935
DOI - 10.1364/ao.14.001413
Subject(s) - scintillation , optics , cirrus , detection theory , binary number , physics , bit error rate , signal (programming language) , channel (broadcasting) , free space optical communication , poisson distribution , amplitude , optical communication , algorithm , detector , statistics , mathematics , computer science , telecommunications , meteorology , arithmetic , programming language
The optimum detection threshold in an on-off binary optical communications system operating in the presence of atmospheric turbulence has been investigated assuming a Poisson detection process and log normal scintillation. The dependence of the probability of bit error on log amplitude variance and received signal strength has been analyzed, and semi-emperical relationships to predict the optimum detection threshold have been derived. On the basis of this analysis, a piecewise linear model for an adaptive threshold detection system is presented. The bit error probabilities for nonoptimum threshold detection systems have also been investigated.
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