Fading Reduction by Aperture Averaging and Spatial Diversity in Optical Wireless Systems

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Executive Summary

Atmospheric turbulence can cause significant performance degradation in free-space optical communication systems. It is well known that the effect of turbulence can be reduced by performing aperture averaging and ? or employing spatial diversity at the receiver. In this paper, authors provide a synthesis on the effectiveness of these techniques under different atmospheric turbulence conditions from a telecommunication point of view. In particular, authors quantify the performance improvement in terms of average Bit Error Rate (BER) and outage capacity, which are among important parameters in practice.

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