Abstract
In this paper, we analyze the performance of the all-optical multihop radio
over a free space optical (RoFSO) communication system with amplify-and-forward (AF)
relays under varying weather conditions. The proposed channel model considers the
propagation loss, attenuation and atmospheric fading modeled by the Gamma-Gamma (GG)
distribution. Both the amplified spontaneous emission (ASE) noise in the all-optical
relays and the background noise projected onto receiver apertures have been
considered in the analysis. The lower bound analytical expressions for the
end-to-end bit error rate (BER) and outage probability are derived for the multihop
system employing the all-optical relays with the full channel state information
(CSI). Meanwhile, the exact results for BER and outage probability are obtained via
Monte Carlo simulation. Results indicate the performance of the proposed system will
be improved by the multihop transmission technology. For a fixed number of relays,
the BER and outage probability will be increased with the deterioration of the
weather conditions.
© 2015 Optical Society of Korea
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