Outage analysis of mixed FSO/WiMAX link
Journal article, Peer reviewed
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Original versionIEEE Photonics Journal. 2016, 8 (1), . 10.1109/JPHOT.2016.2516250
In this paper, we study the outage performance of a complex system consisting of a free-space optical (FSO)/radio-frequency (RF) link. Using radio over free-space optics technology, the FSO link carries Worldwide Interoperability for Microwave Access (WiMAX) signals from a core network to a WiMAX base station, delivering traffic to multiple end RF users. A novel closed-form analytical expression for overall outage probability is derived when M-ary phase-shift keying (M-PSK) and M-ary quadrature amplitude modulation (M-QAM) are applied. The analysis is performed when the FSO link is under the influence of the Gamma-Gamma turbulence, path loss, and misalignment between the transmitter and receiver apertures, and the RF part is influenced by the Gamma-shadowed Nakagami-m multipath fading. To illustrate the usefulness of the derived expressions, we present some numerical results that enable us to estimate the effects of different transceiver and channel parameters on the outage probability...