Physical Layer Security Enhancement Exploiting Intelligent Reflecting Surface

Feng, Kai; Xiao, Li; Han, Yu; Jin, Shi; Chen, Yijian

doi:10.1109/lcomm.2020.3042344

Cited by 105 publications

(53 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concept of RISs as a controllable device enhance aforementioned function as of its controllability on propagation environments. Many works focus on link transmission metric [16][17][18][19][20], channel estimation [21][22][23][24], PHY security [25][26][27], and practical applications [28][29][30] to analyze performance of RISs-assisted systems. Specifically, [16] optimizes transmission power and reflection coefficient to achieve sum-rate maximization when each mobile user has QoS guarantee.…”

Section: Related Workmentioning

confidence: 99%

Analysis of Multipath Fading and Doppler Effect with Multiple Reconfigurable Intelligent Surfaces in Mobile Wireless Networks

Jiang

2022

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

The multipath fading and Doppler effect are well-known phenomena affecting channel quality in mobile wireless communication systems. Within this context, the emergence of reconfigurable intelligence surfaces (RISs) brings a chance to achieve this goal. RISs as a potential solution are considered to be proposed in sixth generation (6G). The core idea of RISs is to change the channel characteristic from uncontrollable to controllable. This is reflected by some novel functionalities with wave absorption and abnormal reflection. In this paper, the multipath fading and Doppler effect are characterized by establishing a mathematical model from the perspective of reflectors and RISs in different mobile wireless communication processes. In addition, the solutions that improve the multipath fading and Doppler effect stemming from the movement of mobile transmitter are discussed by utilizing multiple RISs. A large number of experimental results demonstrate that the received signal strength abnormal fluctuations due to Doppler effect can be eliminated effectively by real-time control of RISs. Meanwhile, the multipath fading is also mitigated when all reflectors deployed are coated with RISs.

show abstract

Section: Related Workmentioning

confidence: 99%

Analysis of Multipath Fading and Doppler Effect with Multiple Reconfigurable Intelligent Surfaces in Mobile Wireless Networks

Jiang

2022

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

show abstract

“…In respect of the AO algorithm, the authors in [95] considered a RIS-assisted wiretap communication system consisting of a multiple-antenna BS, a single-antenna legitimate user, one RIS, and one multiple-antenna eavesdropper. The authors designed an AO algorithm to optimize the beamforming vector at the BS under fixed RIS phase shifts.…”

Section: ) State-of-the-artmentioning

confidence: 99%

“…The authors designed an AO algorithm to optimize the beamforming vector at the BS under fixed RIS phase shifts. In contrast with the work in [95], a robust beamforming scheme for secure RIS-aided NOMA transmissions relying on AN was explored [96].…”

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

View full text Add to dashboard Cite

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.

show abstract

“…. We present the right-hand-side (RHS) of (16,17) as the functions of a variable z, instead of t, to simplify the calculation involving ARs on the next subsection.…”

Section: Propositionmentioning

confidence: 99%

“…The first approach focuses to propose alternating optimization algorithms to optimize the phase shift of the IRS and other system parameters, such as transmit weight vectors and power allocation strategies, to maximize the system performance for given states of the wireless channels [14,15]. Similar works but in the securecommunication scenario were investigated in [16,17]. This approach requires an efficient channel state information (CSI)-acquisition method to achieve a large number of CSI during a short interval of each communication time block.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Secrecy Performance for NOMA Systems With Intelligent Reflecting Surface: Analysis and Optimization

Tuan

Hong

2021

IEEE Access

View full text Add to dashboard Cite

This paper studies the effectiveness of intelligent reflecting surface (IRS) in enabling robust secure communications for indoor non-orthogonal multiple access (NOMA) systems. Using an IRS-control and power-allocation (PA) strategy (IRSCaPAS), the system purposely allocates its reflecting tiles (RTs) with reasonable phase shifts to the receivers, including two users and a potential eavesdropper, as well as adjusts the PA factor of NOMA. The goal of the paper is to boost the average secrecy rates (ASRs) for the users via optimizing the IRSCaPAS. The closed-form expressions for the ASR are derived for the generalized case where the successive interference cancellation (SIC) receivers for NOMA are imperfect. Using these expressions, heuristic algorithms (HA) are adopted to optimize the IRSCaPAS. The numerical results show a vital role of the IRS in enhancing the system secrecy performance and the efficiency of the proposed algorithms. Moreover, these results provide useful insights into the effects of various key parameters on the secrecy performance, such as the size of the IRS, the source transmit power, the NOMA PA factors, the scattering-signal power, the K factors of the Rice channels, the SIC imperfection factor, and the locations of devices.INDEX TERMS Intelligent reflecting surface, imperfect non-orthogonal multiple access, physical layer security, average secrecy rate, heuristic algorithm-based optimization.

show abstract

Physical Layer Security Enhancement Exploiting Intelligent Reflecting Surface

Cited by 105 publications

References 12 publications

Analysis of Multipath Fading and Doppler Effect with Multiple Reconfigurable Intelligent Surfaces in Mobile Wireless Networks

Analysis of Multipath Fading and Doppler Effect with Multiple Reconfigurable Intelligent Surfaces in Mobile Wireless Networks

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

Enhancing Secrecy Performance for NOMA Systems With Intelligent Reflecting Surface: Analysis and Optimization

Contact Info

Product

Resources

About