Optical Wireless Links With Spatial Diversity Over Strong Atmospheric Turbulence Channels

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Executive Summary

Optical wireless, also known as free-space optics, has received much attention in recent years as a cost-effective, licensefree and wide-bandwidth access technique for high data rates applications. The performance of Free-Space Optical (FSO) communication, however, severely suffers from turbulence-induced fading caused by atmospheric conditions. Multiple laser transmitters and/or receivers can be placed at both ends to mitigate the turbulence fading and exploit the advantages of spatial diversity. Spatial diversity is particularly crucial for strong turbulence channels in which Single-Input Single-Output (SISO) link performs extremely poor.

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