Robust Transmission Design for RIS-Assisted Secure Multiuser Communication Systems in the Presence of Hardware Impairments

Peng, Zhangjie; Weng, Ruisong; Pan, Cunhua; Zhou, Gui; Renzo, Marco Di; Swindlehurst, A. Lee

doi:10.1109/twc.2023.3252046

Cited by 10 publications

(4 citation statements)

References 51 publications

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“…2) Sensitivity to Uncontrolled Multipath: We now discuss the performance in the presence of a multipath-rich channel. The BS is considered to be directive, and hence only one LoS path exists in the BS-RIS channel [37], [38]. On the other hand, the channel between the RIS and the UE is modeled as Rician [39], [40], which yields a change in the signal model of (1) into…”

Section: Sensitivity Analysesmentioning

confidence: 99%

Constrained RIS Phase Profile Optimization and Time Sharing for Near-field Localization

Rahal¹,

Denis²,

Keykhosravi

et al. 2022

2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring)

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In the context of single-base station (BS) nonline-of-sight (NLoS) single-epoch localization with the aid of a reflective reconfigurable intelligent surface (RIS), this paper introduces a novel three-step algorithm that jointly estimates the position and velocity of a mobile user equipment (UE), while compensating for the Doppler effects observed in near-field (NF) at the RIS elements over the short transmission duration of a sequence of downlink (DL) pilot symbols. First, a low-complexity initialization procedure is proposed, relying in part on far-field (FF) approximation and a static user assumption. Then, an alternating optimization procedure is designed to iteratively refine the velocity and position estimates, as well as the channel gain. The refinement routines leverage small angle approximations and the linearization of the RIS response, accounting for both NF and mobility effects. We evaluate the performance of the proposed algorithm through extensive simulations under diverse operating conditions with regard to signal-to-noise ratio (SNR), UE mobility, uncontrolled multipath and RIS-UE distance. Our results reveal remarkable performance improvements over the stateof-the-art (SoTA) mobility-agnostic benchmark algorithm, while indicating convergence of the proposed algorithm to respective theoretical bounds on position and velocity estimation.

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Section: Sensitivity Analysesmentioning

confidence: 99%

Constrained RIS Phase Profile Optimization and Time Sharing for Near-field Localization

Rahal¹,

Denis²,

Keykhosravi

et al. 2022

2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring)

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“…Hence in like with these, only considered the effect of transceiver HWIs in our paper. As such some other papers, including [42] considered the effect of both imperfections on the performance of the systems.…”

Section: System and Signal Modelmentioning

confidence: 99%

RIS-Aided Secure Millimeter-Wave Communication Under RF-Chain Impairments

Ragheb,

Kuhestani,

Kazemi

et al. 2024

IEEE Trans. Veh. Technol.

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The effects of hardware impairments (HWIs) on the secrecy performance of a reconfigurable intelligent surface (RIS)assisted millimeter wave system are investigated, where a multiantenna base station (BS) transmits confidential messages to a single-antenna mobile user (MU) in the presence of a singleantenna passive eavesdropper (Eve). Artificial noise (AN)-aided transmission by the BS is proposed for improving the achievable secrecy rate. As the first step, we construct a system model in the absence of HWIs. For this case, we present optimal solutions for the signal and AN powers, the beamforming design at the BS, and the phase shifts of the RIS elements. Then closed-form expressions are derived for the cumulative distribution functions of the signal-to-noise-ratios experienced at the legitimate and eavesdropping nodes. Finally, a compact solution is presented for the ergodic secrecy rate (ESR) performance. At the next step, we extend our designs and analysis by considering the HWIs of the radio-frequency (RF) modules of the BS, MU and Eve. Our results highlight the detrimental impact of HWIs on the achievable ESR. Finally, we find that the ESR can be further increased by beneficially distributing the tolerable HWIs between the transmission and reception RF chains.

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“…In [171], the authors studied secure EE maximization by optimizing the BS transmit covariance matrix, RIS phase shifts, and the redundancy rate subject to SOP constraint, RIS phase shifts constraints, and transmit power constraint. 5) Ergodic Secrecy Rate: In [289], the authors investigated the optimization of the BS beamforming vector and the phase shifts of the reflecting elements at the RIS so as to maximize the weighted minimum approximate ergodic SR subject to BS transmit power constraint and RIS phase shifts constraint. To solve this problem, the joint problem was first decoupled into two tractable subproblems, which were tackled alternatively via the BCD method.…”

Section: B Other Secrecy Metrics For Optimizationmentioning

confidence: 99%

Relay Selection for Improving Physical Layer Security in D2D Underlay Communications

2022

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This paper investigates the physical layer security of inband underlay Device-to-Device (D2D) communication, where the direct link between D2D users is not available. In this respect, optimal relay and suboptimal relay selections are utilized to secure the D2D transmission. The eavesdropper uses either maximal-ratio combining or selection combining to increase the wiretapped signals. The D2D secrecy performance analysis is performed regarding the secrecy outage probability (SOP) and the probability of non-zero secrecy capacity, and closed-form expressions are provided for both relay selection approaches and verified using Monte-Carlo simulation. From the numerical results, it is shown that increasing the number of D2D relays enhances the secrecy performance of D2D communications. Moreover, the exact asymptotic analysis of the SOP is provided. It turns out that the diversity order of both relay selection approaches is the same.INDEX TERMS Physical layer security, D2D communications, secrecy outage probability, optimal and suboptimal relay selection, maximal-ratio combining, and selection combining., 1

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Robust Transmission Design for RIS-Assisted Secure Multiuser Communication Systems in the Presence of Hardware Impairments

Cited by 10 publications

References 51 publications

Constrained RIS Phase Profile Optimization and Time Sharing for Near-field Localization

Constrained RIS Phase Profile Optimization and Time Sharing for Near-field Localization

RIS-Aided Secure Millimeter-Wave Communication Under RF-Chain Impairments

Relay Selection for Improving Physical Layer Security in D2D Underlay Communications

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