New results in secrecy analysis of mixed RF/FSO cooperative relaying networks

Abstract In this research work, the secrecy performance of a mixed radio frequency (RF)/ free space optical (FSO) cooperative relaying system has been analyzed. The statistics on the RF link has been modeled using the Nakagami- m model. The FSO link has been considered to be affected by joint impact of atmospheric turbulence and pointing error which has been assumed to undergo Malaga ( M ) distribution. The security of cooperative relaying system is considered to be impacted due to presence of eavesdropper in the vicinity of the destination node. The relay to eavesdropper link undergoes turbulence and pointing error modeled using the M distribution. More importantly, the source and relay nodes have been assumed to operate non-ideally which has been quantified as aggregated hardware impairment. For the system under test, closed-form expression has been derived for the average secrecy rate (ASR) in terms of extended generalized bivariate Fox H-function (EGBFHF). Furthermore, considering large values for the average signal-to-noise (SNR) on both RF and FSO links, asymptotic expressions for ASR have been derived in terms of elementary functions. The obtained secrecy rate results of the mixed RF/FSO relaying scheme suggest that the presence of eavesdropper and hardware impairment at the relay impacts the ASR offered by the system significantly.

[1]  Manav R. Bhatnagar,et al.  Physical Layer Security of Hybrid Satellite-FSO Cooperative Systems , 2019, IEEE Photonics Journal.

[2]  Mohamed-Slim Alouini,et al.  Rician ${K}$ -Factor-Based Analysis of XLOS Service Probability in 5G Outdoor Ultra-Dense Networks , 2019, IEEE Wireless Communications Letters.

[3]  K. Gupta,et al.  An integral involving generalized function of two variables , 1972 .

[4]  Mohamed-Slim Alouini,et al.  On Secure Mixed RF-FSO Systems With TAS and Imperfect CSI , 2018, IEEE Transactions on Communications.

[5]  Mohsen Guizani,et al.  Impact of Non-Linear High-Power Amplifiers on Cooperative Relaying Systems , 2017, IEEE Transactions on Communications.

[6]  Mohamed-Slim Alouini,et al.  On the Physical Layer Security of a Decode and Forward Based Mixed FSO/RF Co-Operative System , 2020, IEEE Wireless Communications Letters.

[7]  George K. Karagiannidis,et al.  Spectrum Sensing in Full-Duplex Cognitive Radio Networks Under Hardware Imperfections , 2017, IEEE Transactions on Vehicular Technology.

[8]  Huan Zhang,et al.  Performance Analysis of Physical Layer Security Over Generalized-$K$ Fading Channels Using a Mixture Gamma Distribution , 2016, IEEE Communications Letters.

[9]  Khairi Ashour Hamdi,et al.  Capacity of MRC on Correlated Rician Fading Channels , 2008, IEEE Transactions on Communications.

[10]  Mohamed-Slim Alouini,et al.  On Secrecy Performance of Mixed RF-FSO Systems , 2017, IEEE Photonics Journal.

[11]  George K. Karagiannidis,et al.  How Much Does I/Q Imbalance Affect Secrecy Capacity? , 2016, IEEE Communications Letters.

[12]  Tran Trung Duy,et al.  Relay Selection for Security Enhancement in Cognitive Relay Networks , 2015, IEEE Wireless Communications Letters.

[13]  Brian K. Johnson,et al.  Tractable Approach to MmWaves Cellular Analysis With FSO Backhauling Under Feedback Delay and Hardware Limitations , 2019, IEEE Transactions on Wireless Communications.

[14]  Mohsen Guizani,et al.  Aggregate Hardware Impairments Over Mixed RF/FSO Relaying Systems With Outdated CSI , 2018, IEEE Transactions on Communications.

[15]  Miguel R. D. Rodrigues,et al.  Secrecy Capacity of Wireless Channels , 2006, 2006 IEEE International Symposium on Information Theory.

[16]  Mazen O. Hasna,et al.  Physical Layer Security for TAS/MRC Systems With and Without Co-Channel Interference Over $\eta$–$\mu$ Fading Channels , 2018, IEEE Transactions on Vehicular Technology.

[17]  Mohamed-Slim Alouini,et al.  Physical-Layer Security for Mixed η-μ and ℳ-Distribution Dual-Hop RF/FSO Systems , 2018, IEEE Trans. Veh. Technol..

[18]  Emil Björnson,et al.  A New Look at Dual-Hop Relaying: Performance Limits with Hardware Impairments , 2013, IEEE Transactions on Communications.

[19]  Mohamed-Slim Alouini,et al.  Secrecy Outage Analysis of Mixed RF-FSO Downlink SWIPT Systems , 2018, IEEE Transactions on Communications.

[20]  Ghanshyam Singh,et al.  A statistical channel model for a decode-and-forward based dual hop mixed RF/FSO relay network , 2018 .

[21]  George K. Karagiannidis,et al.  Effects of RF Impairments in Communications Over Cascaded Fading Channels , 2016, IEEE Transactions on Vehicular Technology.

[22]  Ramesh Bhandari.  Orbital Angular Momentum (OAM) Mode Mixing in a Bent Step Index Fiber in Perturbation Theory , 2019, IEEE Photonics Journal.