Outage Performance of Mixed RF-FSO Systems Over DGG and Nakagami-<i>m</i> Channels

Ashrafzadeh, Behnam; Soleimani‐Nasab, Ehsan; Zaimbashi, Amir; Uysal, Murat

doi:10.1109/lwc.2020.3014683

Cited by 16 publications

(3 citation statements)

References 22 publications

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“…Nakagami-m fading distribution [30]. It is a versatile model capable of describing both slow and fast fading scenarios whose PDF and CDF are given as…”

Section: ) Rf Channel Model Between S→ementioning

confidence: 99%

Uplink Secrecy Performance of RIS-Based RF/FSO Three-Dimension Heterogeneous Networks

Wang

Wei

et al. 2024

IEEE Trans. Wireless Commun.

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In this paper, a novel reconfigurable intelligent surface (RIS)-assisted HAP-UAV secure multi-user mixed radio frequency (RF)/free space optical (FSO) system is proposed. Specifically, the Gamma-Gamma distribution is utilized to characterize the atmospheric turbulence effect for the FSO link from UAV to HAP, while the Rayleigh and Nakagami-m distribution fading are applied to simulate the legitimate and wiretap RF links, respectively. We present the closed-form expressions for the probability density functions, the cumulative distribution functions, and the secrecy outage probability (SOP) of the end-toend signal-to-noise ratio (SNR) in terms of Meijer's G-function.To gain more insight into secrecy performance, we further obtain the closed-form expressions for the asymptotic SOP, the asymptotic probability of positive secrecy capacity (PPSC), the diversity gain, and the coding gain at high SNR regions. We can observe that the secrecy performance depends on the weaker channel between the RF and FSO, and is closely related to the number of RIS elements, the number of terrestrial users, the atmospheric turbulence factor, pointing error parameters, and the fading parameter of Nakagami-m distributed wiretap link. Finally, numerical results validate the derived results and demonstrate that the proposed design achieves superior secrecy performance over the benchmarks.

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“…Nakagami-m fading distribution [30]. It is a versatile model capable of describing both slow and fast fading scenarios whose PDF and CDF are given as…”

Section: ) Rf Channel Model Between S→ementioning

confidence: 99%

Uplink Secrecy Performance of RIS-Based RF/FSO Three-Dimension Heterogeneous Networks

Wang

Wei

et al. 2024

IEEE Trans. Wireless Commun.

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“…Dual-hop systems have been introduced as a potential architecture to integrate emerging wireless networks and extend the coverage area [19]. Several research papers have analyzed the performance of dual-hop networks [20]- [23], but very few have taken into account the use of RIS technology in mixed dual-hop systems [24]- [27]. The article [24] examined the performance of a combined radio frequency (RF)-free space optical (FSO) network and found that incorporating RIS technology in such a network can result in a significant improvement in performance, with potential practical implications.…”

Section: A Background and Related Workmentioning

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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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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“…A mixed FSO-radio-frequency relaying system was considered in [3] with the GG turbulence channel and Rayleigh fading RF channel. In [9], the authors presented a comprehensive outage performance analysis of a mixed RF-FSO communication system, where the RF link was distributed over the Nakagami-m channel, while the FSO link followed GG turbulence. Additionally, the performance of a cooperative power-line communication-FSO communication system was analyzed in terms of the outage probability and average bit error rate (BER) in [10].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Dual-Hop FSO Cooperative Systems over ℱ Turbulence with Pointing Errors

Tran

Kim

2022

Photonics

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Recently, atmospheric-turbulence-induced fading in free-space optical (FSO) communication with pointing error impairment was modeled and studied using the Fisher–Snedecor F distribution with a good fit to experimental data. In this letter, we investigate the end-to-end performance of dual-hop FSO fixed-gain relaying systems operating over F turbulence channels. More specifically, we present closed-form expressions for the cumulative distribution function and the probability density function of the end-to-end signal-to-noise (SNR) ratio of the proposed system. Consequently, the outage probability, ergodic capacity, and average bit error rate performance are derived with tight asymptotic results in high-SNR regimes to gain more insight into the impacts of system parameters and channel turbulence conditions. Finally, Monte Carlo simulations are provided to validate the analytical results, revealing a significant performance gain compared to a single FSO link in the medium- to high-SNR range by using dual-hop FSO relaying.

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Outage Performance of Mixed RF-FSO Systems Over DGG and Nakagami-m Channels

Cited by 16 publications

References 22 publications

Uplink Secrecy Performance of RIS-Based RF/FSO Three-Dimension Heterogeneous Networks

Uplink Secrecy Performance of RIS-Based RF/FSO Three-Dimension Heterogeneous Networks

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

Performance Analysis of Dual-Hop FSO Cooperative Systems over ℱ Turbulence with Pointing Errors

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