Ergodic Secrecy Rate of RIS-Assisted Communication Systems in the Presence of Discrete Phase Shifts and Multiple Eavesdroppers

Xu, Peng; Chen, Gaojie; Pan, Gaofeng; Renzo, Marco Di

doi:10.1109/lwc.2020.3044178

Cited by 59 publications

(37 citation statements)

References 24 publications

(28 reference statements)

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“…In [23], the authors studied the impact of discrete phase shifts for achieving the full diversity order over Rayleigh fading channels. In [24], the authors investigated the ergodic secrecy capacity in the presence of discrete phase shifts and phase noise. In [25], the authors studied the secrecy outage probability of an RIS-assisted communication system over Rayleigh fading channels.…”

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confidence: 99%

Performance Analysis of RIS-Aided Systems With Practical Phase Shift and Amplitude Response

Zhang

Renzo

et al. 2021

IEEE Trans. Veh. Technol.

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Reconfigurable intelligent surfaces (RISs) have drawn significant attention due to their capability of controlling the radio environment and improving the system performance. In this paper, we study the performance of an RIS-assisted single-input single-output system over Rayleigh fading channels. Differently from previous works that assume a constant reflection amplitude, we consider a model that accounts for the intertwinement between the amplitude and phase response, and derive closed-form expressions for the outage probability and ergodic capacity. Moreover, we obtain simplified expressions under the assumption of a large number of reflecting elements and provide tight upper and lower bounds for the ergodic capacity. Finally, the analytical results are verified by using Monte Carlo simulations.

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confidence: 99%

Performance Analysis of RIS-Aided Systems With Practical Phase Shift and Amplitude Response

Zhang

Renzo

et al. 2021

IEEE Trans. Veh. Technol.

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“…The authors maximized the SR under hardware impairments by jointly optimizing the discrete RIS phase shifts and the transmit beamforming. In the work of [103], the Ergodic Secrecy Rate (ESR) of RISaided communication systems was considered in the presence of discrete phase shifts and multiple eavesdroppers.…”

Section: ) State-of-the-artmentioning

confidence: 99%

Reconfigurable Intelligent Surface Aided Multi-User Communications: State-of-the-Art Techniques and Open Issues

Munochiveyi

Pogaku

Do³

et al. 2021

IEEE Access

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Reconfigurable intelligent surface (RIS)-aided communication is considered as an exciting research topic in academic and industrial communities since it provides an emerging affordable solution to achieve high quality and secure next-generation wireless systems. Especially, the deployment of RIS in multi-user wireless networks promises to reduce system hardware costs, signal processing complexity, as well as energy consumption due to small size, lightweight and ability to actively shape the wireless propagation environment. Further, by realizing a cost-effective radio environment, RIS-aided communication can be implemented to be an appealing technology for future integration with other emerging wireless applications and communication systems. Despite the positive appeal, RISs face new challenges that hinder integrating efficiently into wireless networks, such as network secrecy performance and system sum-rates, as well as achieving efficient deployment design in highly dynamic and time-varying wireless environments. To this end, we overview recent state-of-the-art techniques to address the above issues faced in the integration of RISs with various emerging multi-user communication techniques, such as Unmanned Aerial Vehicles (UAVs), Non-Orthogonal Multiple Access (NOMA), Millimeter Wave (mmWave) and Terahertz (THz) communications, Physical Layer Security (PLS), massive antennas, and Simultaneous Wireless Information and Power Transfer (SWIPT). Finally, we highlight promising future research directions of RIS-aided communication in Cell-Free Massive Multiple-Input-Multiple-Output (MIMO) systems, Rate-Splitting Multiple Access (RSMA), Light Fidelity (LiFi), and Cognitive Radio (CR) systems.

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“…In [23], a beamforming and jamming technique were presented jointly to analyze the secrecy performance without any eavesdropper's channel state information (CSI). The impacts of colluding and non-colluding eavesdroppers assuming a discrete phase shift at the RIS was shown in [24] in terms of ergodic secrecy rate. The PLS in vehicular network was described in [4], where the transmission is dependent on RIS, source power, eavesdroppers' position, and distance.…”

Section: A Background and Literature Studymentioning

confidence: 99%

On the Physical Layer Security Performance over RIS-aided Dual-hop RF-UOWC Mixed Network

Hossain¹,

Shabab²,

Badrudduza³

et al. 2021

Preprint

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Since security has been one of the crucial issues for high-yield communications such as 5G and 6G, the researchers continuously come up with newer techniques to enhance the security and performance of these progressive wireless communications. Reconfigurable intelligent surface (RIS) is one of those techniques that artificially rearrange and optimize the propagation environment of electromagnetic waves to improve both spectrum and energy efficiency of wireless networks. Besides, in underwater communication, underwater optical wireless communication (UOWC) is a better alternative/replacement for conventional acoustic and radio frequency (RF) technologies. Hence, mixed RIS-aided RF-UOWC can be treated as a promising technology for future wireless networks. This work focuses on the secrecy performance of mixed dual-hop RIS-aided RF-UOWC networks under the intercepting effort of a probable eavesdropper. The RF link operates under generalized Gamma fading distribution; likewise, the UOWC link experiences the mixture exponential generalized Gamma distribution. The secrecy analysis subsumes the derivations of closed-form expressions for average secrecy capacity, exact and lower bound of secrecy outage probability, and strictly positive secrecy capacity, all in terms of Meijer's G functions. Capitalizing on these derivations, the effects of heterodyne and intensity modulation/direct detection systems, underwater turbulence resulting from air bubble levels, temperature gradients, and salinity gradients, are measured. Unlike conventional models that merely deal with thermally uniform scenarios, this proposed model is likely to be unique in terms of dealing with secrecy analysis of a temperature gradient RIS-aided RF-UOWC network. Lastly, the derivations are validated via Monte-Carlo simulations.

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Ergodic Secrecy Rate of RIS-Assisted Communication Systems in the Presence of Discrete Phase Shifts and Multiple Eavesdroppers

Cited by 59 publications

References 24 publications

Performance Analysis of RIS-Aided Systems With Practical Phase Shift and Amplitude Response

Performance Analysis of RIS-Aided Systems With Practical Phase Shift and Amplitude Response

Reconfigurable Intelligent Surface Aided Multi-User Communications: State-of-the-Art Techniques and Open Issues

On the Physical Layer Security Performance over RIS-aided Dual-hop RF-UOWC Mixed Network

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