Secrecy Outage Analysis of Mixed RF-FSO Downlink SWIPT Systems

Hongjiang Lei, Zhijun Dai, Kihong Park, Weijia Lei, Gaofeng pan, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

88 Scopus citations


We analyze a secure dual-hop mixed radio frequency-free space optical (RF-FSO) downlink simultaneous wireless information and power transfer (SWIPT) systems. The FSO link and all RF links experience Gamma-Gamma, independent and identical Nakagami-m fading, respectively. We analyze the effects of atmospheric turbulence, pointing error, detection technology, path loss, and energy harvesting on secrecy performance. Signal-to-noise ratios at both legitimate and illegitimate receivers are not independent since they are both simultaneously influenced by the FSO link. We derive the closedform expression of the secrecy outage probability (SOP) as well as the asymptotic result for SOP when signal-to-noise ratios at relay and legitimate destinations tend to infinity. Monte-Carlo simulations are performed to verify the accuracy of our analysis. The results show that the secrecy diversity order (SDO) depends on the fading parameter of the relay-destination link and the number of the destination’s antennas. Additionally, the SDO also depends on the fading parameters, the pointing error parameter, and the detection type of the FSO link.
Original languageEnglish (US)
Pages (from-to)6384-6395
Number of pages12
JournalIEEE Transactions on Communications
Issue number12
StatePublished - Aug 17 2018


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