Institute of Electrical & Electronic Engineers
Relay-assisted Free-Space Optical (FSO) transmission exploits the fact that atmospheric turbulence fading variance is distance dependent and yields significant performance gains by taking advantage of the resulting shorter hops. In this paper, the authors first investigate how to determine optimal relay locations in serial and parallel FSO relaying as to minimize the outage probability and then quantify performance improvements obtained through optimal relay placement. Free-Space Optical communication (FSO) refers to optical transmission through the atmosphere using lasers or Light Emitting Diodes (LEDs) as transmit devices. These systems offer higher bandwidth capacity, robustness to electromagnetic interference, virtually unlimited reuse, and unregulated spectrum.