Free space optical (FSO) communication is highly sensitive to atmospheric turbulence. The use of relays where the distance between the transmitter and the receiver is scaling down via multi-hop routing can improve the performance of an FSO link. In this reported work, the outage probability of a multi-hop FSO communication system with amplify-and-forward relays, assuming strong turbulence fading channels, is analytically derived. The turbulence-induced fading is modelled as a multiplicative random process which follows the K or the negative exponential distribution.
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Karagiannidis et al. (2006) studied this question.
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