On Secrecy Analysis of DF Based Dual Hop Mixed RF-FSO Systems

Pan, Xiaojun; Ran, Honglin; Pan, Gaofeng; Xie, Yiyuan; Zhang, Jiliang

doi:10.1109/access.2019.2914227

Cited by 47 publications

(41 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Authors also observed that, in case of variable gain relaying scheme, the RF link has little impact on the secrecy performance of the channel, and the HD technique outperforms the IM/DD technique. In [29], the presence of an eavesdropper was assumed to be in the relay-destination link, and the authors deduced the closed-form expressions for SOP and strictly positive secrecy capacity (SPSC) employing DF relaying scheme. In [30], a SWIPT scenario was proposed where the energy receiver acts as a potential eavesdropper.…”

Section: Introduction a Backgroundmentioning

confidence: 99%

On Secrecy Performance of Mixed Generalized Gamma and Málaga RF-FSO Variable Gain Relaying Channel

et al. 2020

View full text Add to dashboard Cite

The emergence of an array of new wireless networks has led researchers to evaluate the prospect of utilizing the physical properties of the wireless medium in order to design secure systems. In this paper, the physical layer secrecy performance of a mixed radio frequency-free space optical (RF-FSO) system with variable gain relaying scheme is investigated in the presence of an eavesdropper. We assume that the eavesdropper can wiretap the transmitted confidential data from the RF link only. It is further assumed that the main and eavesdropper RF links are modeled as generalized Gamma (GG) fading channel, and the free space optical (FSO) link experiences Málaga turbulence with pointing error impairment. Our primary concern is to protect this confidential information from being wiretapped. Besides pointing error, the atmospheric turbulence and two types of detection techniques (i.e. heterodyne detection and intensity modulation with direct detection) are also taken into consideration. Utilizing amplify-and-forward (AF) scheme, the novel mathematical closed-form expressions for average secrecy capacity, lower bound of secrecy outage probability, and strictly positive secrecy capacity are derived. As both the links (RF and FSO) undergo generalized fading channels, the derived expressions are also general. We present a unification of some existing works utilizing the proposed model to better clarify the novelty of this work. Finally, all the derived expressions are justified via Monte-Carlo simulations. INDEX TERMS Physical layer security, Generalized Gamma fading, Málaga fading, variable gain relay, average secrecy capacity, strictly positive secrecy capacity, and secrecy outage probability.

show abstract

Section: Introduction a Backgroundmentioning

confidence: 99%

On Secrecy Performance of Mixed Generalized Gamma and Málaga RF-FSO Variable Gain Relaying Channel

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Recently, due to the vulnerability of wireless mediums to eavesdropping, physical layer security (PLS) has become a vital issue for the researchers as it can perfectly ensure a secure communication making use of time varying nature of wireless networks without utilization of any secrecy key [34], [35]. A RF-FSO system also suffers from security threat [36]- [45]. In recent times, a secure turbulent FSO link was analyzed in [36] by deriving the expression of probability of strictly positive secrecy capacity (SPSC).…”

Section: Introduction a Background And Related Workmentioning

confidence: 99%

“…The authors derived the expressions of SOP and average secrecy rate (ASR). The authors in [45] analyzed a secure network over Rayleigh-ΓΓ fading channels and derived the expressions of the lower bound of SOP and SPSC.…”

Section: Introduction a Background And Related Workmentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

“…In order to enhance the wireless security, the issue of physical-layer security, which is to utilize the inherent randomness of wireless channel to guarantee the security in physical layer, has attracted increasingly attention from both academia and industry [15], [16], and several works in literature introduced this issue into hybrid RF-FSO systems [17]- [22]. Under Nakagami-m -fading channels, the secrecy performance in terms of secrecy outage probability (SOP) and average secrecy capacity (ASC) were analyzed in [17].…”

Section: Introductionmentioning

confidence: 99%

“…However, all of aforementioned works, i.e., [17]- [19], just consider the scenario that the RF link is wiretapped because of the high-security of FSO link. Due to the inherent impairments of FSO systems, i.e., the random optical irradiance fluctuations and laser-beam divergence, the FSO link may be also wiretapped and only a few works considered this issue [20]- [22]. The authors in [20] studied the probability of strictly positive secrecy capacity (SPSC) for a FSO system under two intercept scenarios, i.e., the eavesdropper near the transmitter and near the receiver.…”

Section: Introductionmentioning

confidence: 99%

Secrecy Analysis for Multi-Relaying RF-FSO Systems With a Multi-Aperture Destination

Zhang

Pan

et al. 2020

IEEE Photonics J.

Self Cite

View full text Add to dashboard Cite

In this paper, we investigate the physical layer security for an asymmetric dual-hop radio frequency-free space optical (RF-FSO) communication system, in which a source transmits information to a multi-aperture destination (D) through a best relay under the wiretapping of a multi-aperture eavesdropper (E). The best relay is selected by a partial relay selection scheme in terms of maximum instantaneous channel gain for the RF link. Moreover, equal gain combining scheme is also used to process the multiple copies of receiving signal at D and E. Assuming all the RF channels are subject to independent and identical distributed (i.i.d.) Nakagami-m fading and all the FSO channels are modeled by i.i.d. Gamma-Gamma process, the secrecy performance in terms of secrecy outage probability and the probability of strictly positive secrecy capacity are studied, and the accuracy of the analytical results is verified by Monte-Carlo simulations.

show abstract

On Secrecy Analysis of DF Based Dual Hop Mixed RF-FSO Systems

Cited by 47 publications

References 27 publications

On Secrecy Performance of Mixed Generalized Gamma and Málaga RF-FSO Variable Gain Relaying Channel

On Secrecy Performance of Mixed Generalized Gamma and Málaga RF-FSO Variable Gain Relaying Channel

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

Secrecy Analysis for Multi-Relaying RF-FSO Systems With a Multi-Aperture Destination

Contact Info

Product

Resources

About