Performance Analysis of Free-Space Optical Systems in Gamma-Gamma Fading

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Executive Summary

Atmospheric turbulence induced fading is one of the main impairments affecting Free-Space Optics (FSO). In recent years, Gamma-Gamma fading has become the dominant fading model for FSO links because of its excellent agreement with measurement data for a wide range of turbulence conditions. In this paper, the authors express the bit error rate of intensity modulated FSO with direct detection in single-input single-output and multiple-input multiple-output Gamma-Gamma fading channels as generalized infinite power series with respect to the signal-to-noise ratio. For fast numerical evaluation these power series are truncated to a finite number of terms and an upper bound for the associated approximation error is provided.

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