Outage Analysis of Practical FSO/RF Hybrid System With Adaptive Combining

Tamer Rakia, Hong Chuan Yang, Mohamed-Slim Alouini, Fayez Gebali

Research output: Contribution to journalArticlepeer-review

111 Scopus citations


Hybrid free-space optical (FSO)/radio-frequency (RF) systems have emerged as a promising solution for high-data-rate wireless transmission. We present and analyze a transmission scheme for the hybrid FSO/RF communication system based on adaptive combining. Specifically, only FSO link is active as long as the instantaneous signal-to-noise ratio (SNR) at the FSO receiver is above a certain threshold level. When it falls below this threshold level, the RF link is activated along with the FSO link and the signals from the two links are combined at the receiver using a dual-branch maximal ratio combiner. Novel analytical expression for the cumulative distribution function (CDF) of the received SNR for the proposed hybrid system is obtained. This CDF expression is used to study the system outage performance. Numerical examples are presented to compare the outage performance of the proposed hybrid FSO/RF system with that of the FSO-only and RF-only systems. © 1997-2012 IEEE.
Original languageEnglish (US)
Pages (from-to)1366-1369
Number of pages4
JournalIEEE Communications Letters
Issue number8
StatePublished - Aug 2015

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KAUST Repository Item: Exported on 2020-10-01


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