Joint Transceiver Beamforming and Reflecting Design for Active RIS-Aided ISAC Systems

Zhu, Qi; Li, Ming; Liu, Rang; Liu, Qian

doi:10.1109/tvt.2023.3249752

Cited by 42 publications

(14 citation statements)

References 39 publications

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“…The RIS enables precise communication through dynamic beamforming, directing signals to intended recipients and reducing interception threats. The combined optimization of transmit and reflection beamforming for secure RIS-ISAC systems was analyzed in [256]. The results validated that the proposed design enhances radar SNR performance, confirming the benefits of incorporating RIS in secure ISAC systems.…”

Section: B Integrating Ris With Enabling Technologies For Secure Comm...mentioning

confidence: 66%

“…Moreover, understanding how cooperative strategies, possibly involving multiple RIS elements, impact the overall security of the communication system can provide valuable insights into the potential for collaborative security tools against potential threats. • The integration of RIS with enabling communications technologies, including mmWave [274], UAV [265], D2D [209], THz [188], CRNs [211], SWIPT [222], MEC [262], satellite networks [233], ISAC [256], and IoT [264] clarifies the considerable significance of RIS in strengthening security across multiple domains. This section provides insights into the adaptability and optimization of RIS for varied communication environments.…”

Section: Lessons Learntmentioning

confidence: 99%

“…This assumption may not always hold, as eavesdroppers could be any type of user or even unknown. Additionally, while some studies focused on passive RISs [256]- [258], [260], [261], and [255] examined active ones. Notably, no research has investigated hybrid RIS configurations, combining passive and active elements, which could offer new opportunities for optimizing secure ISAC.…”

Section: N Ris-assisted Secure Ad-hoc Networkmentioning

confidence: 99%

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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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Section: B Integrating Ris With Enabling Technologies For Secure Comm...mentioning

confidence: 66%

Section: Lessons Learntmentioning

confidence: 99%

Section: N Ris-assisted Secure Ad-hoc Networkmentioning

confidence: 99%

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Relay Selection for Improving Physical Layer Security in D2D Underlay Communications

2022

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“…In [137], the authors provided a comprehensive survey on the recent development and advances of intelligent surfaces. In recent years, several contributions have extensively studied RIS-aided ISAC systems [138][139][140][141][142]. Through RIS-aided ISAC, the directionality and energy control of ISAC beams can be further achieved, especially in environments with high shadowing.…”

Section: Reconfigurable Intelligent Surfacementioning

confidence: 99%

ISAC towards 6G Satellite–Terrestrial Communications: Principles, Status, and Prospects

Gu,

Xu,

Feng

et al. 2024

Electronics

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With the evolution of fifth-generation (5G) to sixth-generation (6G) communication systems, the utilization of spectrum resources faces incremental challenges. Integrated sensing and communication (ISAC) technology, as a crucial element in 6G technology, is expected to enhance energy efficiency and spectrum utilization efficiency by integrating radar and communication signals, achieving environmental awareness, and enabling scene interconnection. Simultaneously, to realize the vision of seamless coverage in 6G, research on integrated satellite-terrestrial communication has been prioritized. To integrate the advantages, ISAC for integrated satellite–terrestrial networks (ISTNs) in 6G has emerged as a potential research direction. This paper offers an extensive overview of the present state of key technologies for ISAC and the development of ISTNs. Meanwhile, with a focus on the ISTN-oriented 6G ISAC system, several hotspot topics, including future application scenarios and key technological developments, are outlined and demonstrated.

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“…Due to the interference mitigation ability, RIS has emerged great research interest in ISAC. In [19], [20], the RIS-aided ISAC system is investigated, and the results show that the RIS enhances the radar signal-to-noise ratio (SNR) significantly. In [21], the joint beamforming and reflection design under RIS-aided ISAC network has been investigated, and the results illustrate the advantages of deploying RIS in ISAC systems.…”

Section: Introductionmentioning

confidence: 99%

Transmissive Reconfigurable Intelligent Surface Transmitter Empowered Cognitive RSMA Networks

Liu

Yuan

et al. 2023

IEEE Commun. Lett.

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In this paper, a novel transmissive reconfigurable intelligent surface (TRIS) transceiver empowered integrated sensing and communications (ISAC) system is proposed for future multi-demand terminals. To address interference management, we implement rate-splitting multiple access (RSMA), where the common stream is independently designed for the sensing service. We introduce the sensing quality of service (QoS) criteria based on this structure and construct an optimization problem with the sensing QoS criteria as the objective function to optimize the sensing stream precoding matrix and the communication stream precoding matrix. Due to the coupling of optimization variables, the formulated problem is a non-convex optimization problem that cannot be solved directly. To tackle the abovementioned challenging problem, alternating optimization (AO) is utilized to decouple the optimization variables. Specifically, the problem is decoupled into three subproblems about the sensing stream precoding matrix, the communication stream precoding matrix, and the auxiliary variables, which is solved alternatively through AO until the convergence is reached. For solving the problem, successive convex approximation (SCA) is applied to deal with the sum-rate threshold constraints on communications, and difference-of-convex (DC) programming is utilized to solve rank-one non-convex constraints. Numerical simulation results verify the superiority of the proposed scheme in terms of improving the communication and sensing QoS.

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Joint Transceiver Beamforming and Reflecting Design for Active RIS-Aided ISAC Systems

Cited by 42 publications

References 39 publications

Relay Selection for Improving Physical Layer Security in D2D Underlay Communications

Relay Selection for Improving Physical Layer Security in D2D Underlay Communications

ISAC towards 6G Satellite–Terrestrial Communications: Principles, Status, and Prospects

Transmissive Reconfigurable Intelligent Surface Transmitter Empowered Cognitive RSMA Networks

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