TY - JOUR
T1 - Secrecy outage analysis of mixed RF-FSO downlink SWIPT systems
AU - Lei, Hongjiang
AU - Dai, Zhijun
AU - Park, Ki Hong
AU - Lei, Weijia
AU - Pan, Gaofeng
AU - Alouini, Mohamed Slim
N1 - Publisher Copyright:
© 1972-2012 IEEE.
PY - 2018/12
Y1 - 2018/12
N2 - We analyze a secure dual-hop mixed radio frequency-free space optical (RF-FSO) downlink simultaneous wireless information and power transfer system. 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 the legitimate and illegitimate receivers are not independent since they are both simultaneously influenced by the FSO link. We derive the closed-form 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. In addition, the SDO also depends on the fading parameters, the pointing error parameter, and the detection type of the FSO link.
AB - We analyze a secure dual-hop mixed radio frequency-free space optical (RF-FSO) downlink simultaneous wireless information and power transfer system. 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 the legitimate and illegitimate receivers are not independent since they are both simultaneously influenced by the FSO link. We derive the closed-form 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. In addition, the SDO also depends on the fading parameters, the pointing error parameter, and the detection type of the FSO link.
KW - Gamma-Gamma fading
KW - Nakagami-m fading
KW - Physical layer security
KW - mixed RF-FSO systems
KW - secrecy outage probability
KW - simultaneous wireless information and power transfer
UR - http://www.scopus.com/inward/record.url?scp=85051828771&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2018.2865944
DO - 10.1109/TCOMM.2018.2865944
M3 - Article
AN - SCOPUS:85051828771
SN - 1558-0857
VL - 66
SP - 6384
EP - 6395
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 12
M1 - 8438982
ER -