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

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

doi:10.1109/jphot.2020.2983078

Cited by 20 publications

(4 citation statements)

References 29 publications

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“…In this paper, we consider a best relay selection-based multi-relay decode-and-forward (DF) cooperative UWVLC system for both horizontal and vertical communication. Best relay selection is a widely used technique in radio-frequency (RF) and optical wireless communication systems employing multiple parallel relays [32][33][34]. In best relay selection, the link with the highest SNR is chosen to communicate with the destination node.…”

Section: Introductionmentioning

confidence: 99%

On Performance Analysis of Cooperative Horizontal and Vertical Underwater VLC Systems with Best Relay Selection

et al. 2023

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In this paper, we consider cooperative horizontal and vertical underwater visible light communication (UWVLC) systems employing best relay selection. In the vertical UWVLC system, the source is placed at the sea surface and the destination is placed at a depth of 60 m. The link between the source and the destination is modeled as concatenated layers considering inhomogeneous environmental conditions. The underwater parameters change with depth, causing a variable refractive index, which leads to non-uniform optical turbulence. The horizontal communication link is analyzed for two different levels of turbulence at 10 m and 50 m depths. Turbulence is modeled using a log-normal distribution, whose statistical parameters depend on the temperature and salinity at different depths. We have also taken into account the path losses caused by absorption and scattering, and carried out a comprehensive performance comparison between the horizontal and the vertical UWVLC systems. Insights show that compared to horizontal links, vertical links need an extra relay in order to achieve the same level of matching performance. Moreover, it is shown that the horizontal system’s outage performance improves with depth.

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Section: Introductionmentioning

confidence: 99%

On Performance Analysis of Cooperative Horizontal and Vertical Underwater VLC Systems with Best Relay Selection

et al. 2023

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“…It should be mentioned that the mixed system of FSO interfaced with multi-antenna/multi-user RF system has been extensively investigated [21]- [26]. The authors in [21] presented the performance of a variable-gain AF based mixed system with transmit diversity for the multi-antenna source on the RF over Rayleigh fading and opportunistic selection on the multi-aperture FSO link.…”

Section: Introductionmentioning

confidence: 99%

“…The authors in [24] studied the performance of a mixed FSO and RF multi-user network with aperture selection and opportunistic user scheduling over shadowed κ-µ RF channels in the presence of Poisson field interference. A multiple relay setup was considered in [26], where the best relay was selected to forward the data from a source over Nakagami-m RF channel to a multi-aperture FSO detector.…”

Section: Introductionmentioning

confidence: 99%

Performance of Hybrid THz and Multi-Antenna RF System with Diversity Combining

Bhardwaj¹,

Zafaruddin²

2022

Preprint

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Recent studies investigate single-antenna radio frequency (RF) systems mixed with terahertz (THz) wireless communications. This paper considers a two-tier system of THz for backhaul and multiple-antenna assisted RF for the access network. We analyze the system performance by employing both selection combining (SC) and maximal ratio combining (MRC) receivers for the RF link integrated with the THz using the fixed-gain amplify and forward (AF) protocol. We develop the probability density function (PDF) and cumulative distribution function (CDF) of the end-to-end signal-to-noise (SNR) of the dual-hop system over independent and non-identically distributed (i.ni.d.) α-µ fading channels with a statistical model for misalignment errors in the THz wireless link. We use the derived statistical results to develop analytical expressions of the outage probability, average bit error rate (BER), and ergodic capacity for the performance assessment of the considered system. We develop diversity order of the system using asymptotic analysis in the high SNR region, demonstrating the scaling of system performance with the number of antennas. We use computer simulations to show the effect of system and channel parameters on the performance of the hybrid THz-RF link with multiantenna diversity schemes.

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“…Although this method guarantees the reliability of the system, the cost is high and the resources are wasted. In [22], the RF/OOWC system chooses the partial relay scheme maximize the instantaneous channel gain for the RF link.…”

Section: Introductionmentioning

confidence: 99%

Relay-Assisted Technology in Optical Wireless Communications: A Survey

et al. 2020

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When the distance between the source and the target is long, the signal will be affected by atmospheric turbulence, weather conditions and obstacles, which cannot support the information transmission. One of the existing solutions is to use relay-assisted technology (RAT). It makes the communications between the source and the destination possible under better channel conditions by setting up relay between the source and the destination. There are few comprehensive articles about relay-assisted technology in OWC. To fill this gap, this paper introduces the RAT of indoor optical wireless communications (IOWC), outdoor optical wireless communications (OOWC) and underwater optical wireless communications (UOWC) in different application scenarios, which has a better effect than direct communication between source and destination. The relay protocols, channel models, modulation techniques under three relay modes are reviewed. Finally, challenges of RAT in OWC are put forward and potential solutions are also given.

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

Cited by 20 publications

References 29 publications

On Performance Analysis of Cooperative Horizontal and Vertical Underwater VLC Systems with Best Relay Selection

On Performance Analysis of Cooperative Horizontal and Vertical Underwater VLC Systems with Best Relay Selection

Performance of Hybrid THz and Multi-Antenna RF System with Diversity Combining

Relay-Assisted Technology in Optical Wireless Communications: A Survey

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