On the Performance of Reconfigurable Intelligent Surface in Cooperative Decode-and-Forward Relaying for Hybrid Rf/Fso Systems

Odeyemi, Kehinde O.; Owolawi, Pius A.; Olakanmi, Oladayo Olufemi

doi:10.2528/pierm22020601

Cited by 5 publications

(4 citation statements)

References 35 publications

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“…Therefore, a study in [29] scrutinized a full-duplex (FD) relaying-based RF-FSO mixed system, revealing substantial performance enhancements achieved through the utilization of parallel RF/FSO links within an FD relaying channel. In [30], it was demonstrated that the RISaided mixed downlink system clearly performs better than the hybrid downlink system without RIS.…”

Section: A Background and Related Workmentioning

confidence: 99%

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Enhancing Physical Layer Secrecy Performance for RIS-Assisted RF-FSO Mixed Wireless System

Ahmed,

Badrudduza,

Islam

et al. 2023

IEEE Access

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The reconfigurable intelligent surface (RIS) is widely recognized as an effective solution for enhancing security in wireless communications, owing to its passive reflective components and the ability to adjust signal phases. In light of this, this study investigates the physical layer security issues for a dual-hop RIS-aided system that makes use of both radio frequency (RF) and free space optical (FSO) connections, while taking into account three different eavesdropping scenarios: i) RF eavesdropping, ii) FSO eavesdropping, and iii) simultaneous RF and FSO eavesdropping. While Nakagami-m distributed fading affects the RF link, Málaga turbulence with pointing error affects the FSO link. The main goal of this research is to guarantee the confidentiality of information, preventing unauthorized access or disclosure. To this end, closed-form expressions are developed for the average secrecy capacity, secrecy outage probability, probability of strictly positive secrecy capacity, and effective secrecy throughput. Monte Carlo simulations are used to verify the precision of these expressions. To further explore the suggested model, the asymptotic formulations of various performance metrics are produced. The impact of different factors, such as fading severity, atmospheric conditions, and detection techniques, on the secrecy performance is analyzed through simulations. Numerical results highlight the significant role of the proposed model in ensuring the security of confidential information and emphasize the substantial impact of key factors on its secrecy performance.INDEX TERMS Reconfigurable intelligent surface, dual-hop system, effective secrecy throughput, secrecy outage probability.

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Section: A Background and Related Workmentioning

confidence: 99%

“…( 20)]. Therefore, the asymptotic representation for the lower bound of SOP 3 can be expressed as (30) where Φ p,q illustrates the qth-term…”

Section: Scenario−iiimentioning

confidence: 99%

Enhancing Physical Layer Secrecy Performance for RIS-Assisted RF-FSO Mixed Wireless System

Ahmed,

Badrudduza,

Islam

et al. 2023

IEEE Access

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“…Thus, the CDF equivalent end-to-end SNR of the ground user for the proposed network can be defined as [29,30]:…”

Section: Statistical Characteristics Of Equivalent Snrmentioning

confidence: 99%

On Secrecy Performance of a Dual-Hop UAV-Assisted Relaying Network with Randomly Distributed Non-Colluding Eavesdroppers: A Stochastic Geometry Approach

2022

Self Cite

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Unmanned aerial vehicle (UAV)-based relaying has been considered to offer an excellent performance due to its flexible mobility, on-demand deployment, and cost effectiveness compared to conventional ground-relaying methods. This paper studies the secrecy performance of a dual-hop UAV-assisted relay network, where the base station communicates with the ground user via a low altitude UAV in the presence of randomly distributed eavesdroppers. A stochastic geometric approach is employed to model the spatial locations of the ground user and the eavesdroppers which follows a Homogeneous Poisson Point Process (HPPP). Based on this theory, cumulative distribution functions (CDF) of the ground user and the eavesdroppers are obtained. Considering the decode-and-forward (DF) relay protocol, the CDF equivalent end-to-end instantaneous signal-to-noise ratio (SNR) of the network is derived. To characterize the network secrecy performance, the exact analytical expressions for the network security outage probability (SOP), the strictly positive secrecy capacity (SPSC), and the average secrecy capacity (ASC) are derived. Moreover, a Monte-Carlo simulation is provided to show the accuracy of the derived analytical expressions. The results depict that both the network and channel parameters that include the fading parameter, the density of the eavesdroppers, the average SNR of the B-to-U link, the average SNR of the U-to-E link, the UAV altitude, and the coverage radius have a significant influence on the network secrecy performance.

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“…However, the proposed system was not a relay-assisted communication. Also, the authors in [16] studied the performance of an RIS-aided cooperative hybrid FSO/RF network, but the relay mode was based on half duplex where the self-interference at the relay was negligible. Also, the foggy condition was not considered as channel impairments on the FSO link.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Intelligent Surface Assisted Full-duplex Relay Hybrid FSO/RF Systems over Atmospheric Turbulence with Foggy Impairments

Odeyemi,

Owolawi,

Olakanmi

2023

PIER Letters

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The outage probability performance of a hybrid free space optical (FSO)/radio frequency (RF) system with a reconfigurable intelligent surface (RIS) assisted full-duplex relay is presented in this paper. The FSO link follows the Gamma-Gamma distribution over pointing error and atmospheric turbulence with random foggy impairments. The RF link between the relay and the destination is subject to Nakagami-m distributions, while the RIS links and relay self-interference (SI) link follow Rayleigh fading. As a result, the RIS-to-relay link's cumulative distribution function (CDF) of the signal to interference plus noise ratio (SINR) is obtained. On the basis of this, the system's outage probability is determined according to the decode and forward relay protocol. Thus, Monte-Carlo simulations are utilized to verify the obtained expression's accuracy. Our findings show how atmospheric turbulence, pointing errors, fog conditions, and the number of RIS reflecting elements affect the system performance. Furthermore, it is concluded that, under the identical channel conditions, heterodyne detection performs better than intensity modulation/direct detection (IM/DD).

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On the Performance of Reconfigurable Intelligent Surface in Cooperative Decode-and-Forward Relaying for Hybrid Rf/Fso Systems

Cited by 5 publications

References 35 publications

Enhancing Physical Layer Secrecy Performance for RIS-Assisted RF-FSO Mixed Wireless System

Enhancing Physical Layer Secrecy Performance for RIS-Assisted RF-FSO Mixed Wireless System

On Secrecy Performance of a Dual-Hop UAV-Assisted Relaying Network with Randomly Distributed Non-Colluding Eavesdroppers: A Stochastic Geometry Approach

Reconfigurable Intelligent Surface Assisted Full-duplex Relay Hybrid FSO/RF Systems over Atmospheric Turbulence with Foggy Impairments

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