Dual-Hop Full-Duplex DF Relay Channel with Parallel Hybrid RF/FSO Links

Ninos, Michalis P.; Mukherjee, Priyadarshi; Psomas, Constantinos; Krikidis, Ioannis

doi:10.1109/globecom46510.2021.9685939

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…They showed that the implementation of the SSD technique leads to increased spectral efficiency within RF-FSO mixed systems. 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%

“…Asymptotic Analysis: With the use of [54,Eq. (20)], the Meijer's G function is expanded, and as a consequence, the asymptotic expression due to the lower bound of SOP 2 may be written as (29) where Ψ p,q illustrates the qth-term of Ψ p ,…”

Section: Performance Metricsmentioning

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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“…iii. Relative to dual-hop hybrid RF/FSO systems in [14,[18][19][20]22], the proposed system presented in this paper is RIS-assisted dual-hop hybrid RF/FSO. iv.…”

Section: Parallel Transmission At Downlinkmentioning

confidence: 99%

“…In this study, the system employing FSO links between the satellite and the relays in the first hop and hybrid RF/FSO transmission was established between the relays and the ground stations in the second hop. Ninos et al in [20] studied the performance of a dual-hop full-duplex DF relaying system where each hop consists of a parallel hybrid RF/FSO link. In addition, the performance analysis of DF multi-hop hybrid RF/FSO system under the hard switching scheme was presented in [21], where the outage probability and ergodic capacity of the system were obtained under the effect of different weather conditions.…”

Section: Introductionmentioning

confidence: 99%

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

Odeyemi¹,

Owolawi²,

Olakanmi³

2022

PIER M

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Reconfigurable intelligent surface (RIS) has been suggested as a promising solution to prevent wireless communication systems from transmission blockage. In this paper, the performance of reconfigurable intelligent surface in cooperative decode-and-forward relaying for hybrid radio frequency (RF)/free space optical (FSO) system is evaluated where parallel transmission of information occurs on the system downlink. In this network, the RF links in the system are assumed to follow Nakagami-m distributions while the FSO link is subjected to Gamma-Gamma distribution. Thus, the exact closedform expressions of the system outage probability and average bit error rate are obtained to quantify the system performance. The accuracy of these expressions is justified by Monte-Carlo simulations. Also, to get more physical insight from the derived outage probability expression, the asymptotic outage probability under the condition of higher signal-to-noise ratio (SNR) is provided. In addition, the results illustrate that the system and channel parameters significantly affect the performance of the concerned system. Furthermore, the results show that RIS-hybrid downlink system offers better performance than hybrid downlink system without RIS. Under the RIS system, the results demonstrate that RIS-hybrid downlink system outperforms RIS-FSO downlink system.

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“…The combination of RF and FSO links can make it easier to build highly available and high capacity system model in all atmospheric conditions. In reference [5], an RF link impaired by Nakagami-m fading has been enabled in full-duplex (FD) radio with advanced self-interference cancelation techniques and equipped with a parallel DH-FSO sub-system for high-efficient spectral utilisation and enhancing the coverage for a parallel hybrid FSO-RF model. In this hybrid model, the coordination of transmission between the FSO and mm-RF subsystems has been considered by the hard-switching protocol.…”

Section: Introductionmentioning

confidence: 99%

Time hysteresis-switching algorithm assisted dual-hop relaying for hybrid FSO/RF system

Singh

Tiwari

2022

Preprint

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A less-complex and efficient time-hysteresis (TH)-switching algorithm assisted hybrid free-space optics (FSO)/millimeter wave (mm)-radio frequency (RF) system is presented in the paper. For improving the long-haul communication efficiency we blend a decode-and-forward (DF) relaying scheme in the proposed hybrid FSO/RF system along with maximal-ratio-combining (MRC) at receiver end for signal reconstruction.TH-switching is utilized for link transient between FSO and RF links. The exact closed-form expressions for average symbol-error-rate (ASER) and outage-probability (OP) have been derived for the performance evaluation of the system. We also present asymptotic-analysis of the ASER and OP with lower computational-complexity of the proposed system and obtain the diversity-order. To achieve target-SER value for the proposed TH-switching, the optimum-threshold-SNR value has been obtained numerically. It is observed that the proposed switching technique assisted selective-DF-relaying scheme based hybrid system along with MRC outperforms a cooperative single-FSO system as well as single-hop (SH) switching-assisted hybrid system on account of diversity as well as switching technique benefits. The proposed hybrid system achieves SER of 10− 7 in the lower SNR regimes.

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Dual-Hop Full-Duplex DF Relay Channel with Parallel Hybrid RF/FSO Links

Cited by 5 publications

References 18 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 the Performance of Reconfigurable Intelligent Surface in Cooperative Decode-and-Forward Relaying for Hybrid Rf/Fso Systems

Time hysteresis-switching algorithm assisted dual-hop relaying for hybrid FSO/RF system

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