Exact Outage Probability Analysis of the Mixed RF/FSO System With Variable-Gain Relays

Petkovic, Milica I.; Trpovski, Željen

doi:10.1109/jphot.2018.2882611

Cited by 18 publications

(14 citation statements)

References 33 publications

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“…The exact SOP in (22) does not provide much insight into the secure outage performance of the proposed model. Hence, we also derive the asymptotic expression of SOP given in (23). Herein, the Meijer's G term in S 2 is converted into asymptotic term in (23) Similar to (15), the impact of all system parameters on the secure outage behaviour are demonstrated via (22) and (23).…”

Section: B Secrecy Outage Probabilitymentioning

confidence: 99%

“…Hence, we also derive the asymptotic expression of SOP given in (23). Herein, the Meijer's G term in S 2 is converted into asymptotic term in (23) Similar to (15), the impact of all system parameters on the secure outage behaviour are demonstrated via (22) and (23). Additionally, for the conditions of considering Rayleigh-ΓΓ distribution (P kr = P ke = 1) and Nakagami-m-ΓΓ distribution (P kr = P ke = 2 and 3), our demonstrated results in (22) and (23) agree with [46, eqs.…”

Section: B Secrecy Outage Probabilitymentioning

confidence: 99%

“…The authors found that EC can be almost doubled by the TWR scheme. A RF-FSO system with multiple variable gain AF relays was employed in [23]. The authors considered a Rayleigh-Málaga turbulent fading channel with pointing errors and derived the OP for PRS scheme.…”

Section: Introduction a Background And Related Workmentioning

confidence: 99%

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Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

et al. 2020

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In this paper, we investigate a secure dual-hop radio frequency-free space optical (RF-FSO) mixed variable gain relaying framework in the presence of a single eavesdropper. The RF and FSO links are modeled with hyper Gamma (HG) and Gamma-Gamma (ΓΓ) fading channels, respectively. We assume that the eavesdropper utilizes another HG fading channel to wiretap the transmitted confidential data from the RF link. Our key concern is to defend this information against passive eavesdropping. We carry out the secrecy measurements by deriving closed-form mathematical expressions of average secrecy capacity (ASC), secure outage probability (SOP), and strictly positive secrecy capacity (SPSC), all in terms of Meijer's G function. Capitalizing on the derived expressions, we analyze the impacts of atmospheric turbulence and pointing errors on the secrecy capacity and outage performance of the proposed scenario. For gaining more insights, we also analyze the asymptotic outage behaviour for high signal-to-noise ratio. Two detection techniques i.e. heterodyne (HD) and the intensity modulation with direct detection (IM/DD) are taken into consideration and our results demonstrate that HD technique notably outperforms the IM/DD scheme. The supremacy and novelty of the model is demonstrated via utilizing generic properties of the HG fading channel. Finally, we provide a justification of the derived expressions via Monte-Carlo simulations. INDEX TERMS Gamma-Gamma fading, eavesdropper, Hyper-Gamma fading, physical layer security, pointing error, variable gain relay.

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Section: B Secrecy Outage Probabilitymentioning

confidence: 99%

Section: B Secrecy Outage Probabilitymentioning

confidence: 99%

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Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

et al. 2020

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“…The idea of the PRS in a dual-hop RF-FSO relay system with outdated CSI was proposed in [28]. In [28], [29], the outage performance of RF-FSO relaying system with consideration of Rayliegh/(G 2 ) fading was derived and the BEP and EC were achieved in [30] while [31] derived OP assuming Malaga distribution for the FSO links. The authors in [32] generalized it with hardware impairment consideration in transmitters and receivers for fixed gain AF and decodeand-forward (DF) relaying methods, while they considered Malaga distribution for the FSO links.…”

Section: Related Workmentioning

confidence: 99%

“…Based on (30) and by substituting (35), (32) and (1) (for X = I ) into (31) and applying integral identity [40,Eq. (2.24.3.1)] we get (36), as shown at the top of the next page.…”

Section: B Outage Probability Analysis With Direct Linkmentioning

confidence: 99%

Exact and Asymptotic Analysis of Partial Relay Selection for Cognitive RF-FSO Systems With Non-Zero Boresight Pointing Errors

2019

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In this paper, we investigate the performance of asymmetric radio frequency (RF) and free space optical (FSO) dual-hop cooperative relay network along with a direct RF link between source and destination. The FSO link experiences double generalized Gamma turbulence in the presence of the generalized non-zero boresight pointing errors, and RF links experience non-identically distributed Nakagami-m fading. Moreover, considering both cognitive radio and non-cognitive scenarios, a partial relay selection (PRS) strategy has been employed. Furthermore, both relay selection and underlay power restriction are governed with the outdated channel state information (CSI). We also assume both heterodyne and intensity modulation/direct detection methods in the FSO receiver. Under the assumption of amplify-and-forward relaying and PRS, we derive closed-form expressions for outage probability (OP) of both scenarios, while bit-error probability and ergodic capacity of the non-cognitive scenario are also obtained. The asymptotic expressions of OP and diversity order of this network are derived for both perfect CSI and outdated CSI cases. It is demonstrated that the diversity order is a function of the fading severity of the RF links, turbulence parameters of the FSO link, and pointing error, regardless of interference channel parameter of the primary user. INDEX TERMS Cognitive radio network, double generalized Gamma, free space optical communications, non-zero boresight pointing errors, outdated channel state information, partial relay selection. The associate editor coordinating the review of this manuscript and approving it for publication was Wei Wang. the log-normal, log-normal Rician, I-K distribution, Malaga, Gamma-Gamma (G 2) and Double-Weibull [2]. The G 2 is widespread distribution for modeling FSO turbulence channel in the literature, however, G 2 distribution is not completely match with experimental data particularly in tails [2]. Recently, a novel statistical model called Double Generalized Gamma (DGG) distribution has been introduced by [2], where irradiance fluctuations are given by production of small-scale and large-scale fluctuations, both of which are function of generalized Gamma distribution. This model precisely describes the signal propagation under all conditions, (i.e., from weak to strong turbulence conditions) added to the fact that it generalizes other distributions. B. NON-ZERO BORESIGHT MISALIGNMENT Additionally, the building sway phenomenon leads to the vibration of transmitter beam that causes a misalignment between transmitter and receiver known as pointing error.

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An Introduction to Free Space Optical Systems

Upadhya,

Dwivedi,

Singh

2024

Free-Space Optical Communication Systems for Next Generation Networks

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Exact Outage Probability Analysis of the Mixed RF/FSO System With Variable-Gain Relays

Cited by 18 publications

References 33 publications

Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

Secrecy Performance Analysis of Mixed Hyper-Gamma and Gamma-Gamma Cooperative Relaying System

Exact and Asymptotic Analysis of Partial Relay Selection for Cognitive RF-FSO Systems With Non-Zero Boresight Pointing Errors

An Introduction to Free Space Optical Systems

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