Secrecy Performance Analysis of IRS-Aided UAV Relay System

Wang, Wen; Tian, Hui; Ni, Wanli

doi:10.1109/lwc.2021.3112752

Cited by 49 publications

(24 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lately, RIS has drawn much consideration as an up-and-coming technology that can suit future wireless systems demands [ 18 ], i.e., 6G and beyond. Hence, RIS has promoted wireless applications such as RIS-aided wireless power transfer [ 19 ], RIS-aided mobile edge computing [ 20 ], RIS-aided physical layer security [ 21 , 22 ], RIS-aided UAV communications [ 23 , 24 ], and mobility and handover management for RIS-aided wireless communications in high-speed trains [ 25 ].…”

Section: Literature Reviewmentioning

confidence: 99%

Two-Stage Multiarmed Bandit for Reconfigurable Intelligent Surface Aided Millimeter Wave Communications

Mohamed

Hashima

Hatano

et al. 2022

Sensors

View full text Add to dashboard Cite

A reconfigurable intelligent surface (RIS) is a promising technology that can extend short-range millimeter wave (mmWave) communications coverage. However, phase shifts (PSs) of both mmWave transmitter (TX) and RIS antenna elements need to be optimally adjusted to effectively cover a mmWave user. This paper proposes codebook-based phase shifters for mmWave TX and RIS to overcome the difficulty of estimating their mmWave channel state information (CSI). Moreover, to adjust the PSs of both, an online learning approach in the form of a multiarmed bandit (MAB) game is suggested, where a nested two-stage stochastic MAB strategy is proposed. In the proposed strategy, the PS vector of the mmWave TX is adjusted in the first MAB stage. Based on it, the PS vector of the RIS is calibrated in the second stage and vice versa over the time horizon. Hence, we leverage and implement two standard MAB algorithms, namely Thompson sampling (TS) and upper confidence bound (UCB). Simulation results confirm the superior performance of the proposed nested two-stage MAB strategy; in particular, the nested two-stage TS nearly matches the optimal performance.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Two-Stage Multiarmed Bandit for Reconfigurable Intelligent Surface Aided Millimeter Wave Communications

Mohamed

Hashima

Hatano

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…By intelligently tuning the amplitudes and phase shifts of these elements, the RIS is able to modify the wireless channel and customize a favorable smart radio environment (SRE) [6]. With the aid of RISs, the signals from different links can be coherently combined at the legitimate users (Bobs) to constructively enhance the desired signal, or destructively at the eavesdroppers (Eves) to suppress information leakage [7]. These characteristics position RISs as a key enabler for facilitating PLS in an economical and energy-efficient manner.…”

Section: Introductionmentioning

confidence: 99%

“…Most existing researches focus on single-functional RISs (SF-RISs) whose only function is to reflect the incident signal [5]- [7]. To receive the signals from SF-RISs, receivers have to be located at the same side as the transmitters.…”

Section: Introductionmentioning

confidence: 99%

Safeguarding NOMA Networks via Reconfigurable Dual-Functional Surface Under Imperfect CSI

Wang

Tian

et al. 2022

IEEE J. Sel. Top. Signal Process.

Self Cite

View full text Add to dashboard Cite

This paper investigates the use of the reconfigurable dual-functional surface to guarantee the full-space secure transmission in non-orthogonal multiple access (NOMA) networks. In the presence of eavesdroppers, the downlink communication from the base station to the legitimate users is safeguarded by the simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS), where three practical operating protocols, namely energy splitting (ES), mode selection (MS), and time splitting (TS), are studied. The joint optimization of power allocation, active and passive beamforming is investigated to maximize the secrecy energy efficiency (SEE), taking into account the imperfect channel state information (CSI) of all channels. For ES, by approximating the semi-infinite constraints with the S-procedure and general sign-definiteness, the problem is solved by an alternating optimization framework. Besides, the proposed algorithm is extended to the MS protocol by solving a mixed-integer non-convex problem. While for TS, a two-layer iterative method is proposed. Simulation results show that: 1) The proposed STAR-RIS assisted NOMA networks are able to provide up to 33.6% higher SEE than conventional RIS counterparts; 2) TS and ES protocols are generally preferable for low and high power domain, respectively; 3) The accuracy of CSI estimation and the bit resolution power consumption are crucial to reap the SEE benefits offered by STAR-RIS.

show abstract

“…Through sophisticated phase shift design, RIS could improve legitimate user's received SNR without increasing power budget. In addition, due to the randomness of the wireless channel, the signal reflected by the RIS could not only be added constructively at the legitimate user, but also destructively at the eavesdroppers [8]. The application of RIS in UAV-enabled wireless system could improve the secrecy performance with lower energy and cost.…”

Section: Introductionmentioning

confidence: 99%

Secrecy Performance Analysis of RIS-Aided Communication System With Randomly Flying Eavesdroppers

Wei

Wang

Pan

et al. 2022

IEEE Wireless Commun. Lett.

View full text Add to dashboard Cite

In this letter, we analyze the secrecy performance of a reconfigurable intelligent surface (RIS)-aided communication system with spatially random unmanned aerial vehicles (UAVs) acting as eavesdroppers. We consider the scenarios where the base station (BS) is equipped with single and multiple antennas. The signal-to-noise ratios (SNRs) of the legitimate user and the eavesdroppers are derived analytically and approximated through a computationally effective method. The ergodic secrecy capacity is approximated and derived in closed-form expressions. Simulation results validate the accuracy of the analytical and approximate expressions and show the security-enhanced effect of the deployment of the RIS.

show abstract

Secrecy Performance Analysis of IRS-Aided UAV Relay System

Cited by 49 publications

References 21 publications

Two-Stage Multiarmed Bandit for Reconfigurable Intelligent Surface Aided Millimeter Wave Communications

Two-Stage Multiarmed Bandit for Reconfigurable Intelligent Surface Aided Millimeter Wave Communications

Safeguarding NOMA Networks via Reconfigurable Dual-Functional Surface Under Imperfect CSI

Secrecy Performance Analysis of RIS-Aided Communication System With Randomly Flying Eavesdroppers

Contact Info

Product

Resources

About