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Review
Computer Science, Information Systems
Weijian Liu et al.
Summary: Multichannel adaptive signal detection uses test and training data jointly to form an adaptive detector to determine the presence or absence of a target. These adaptive detectors possess constant false alarm rate properties and do not require additional processing. Compared to the filtering-then-CFAR technique, adaptive detection typically exhibits better performance. However, there are few overview articles on this topic, hence this study provides a tutorial overview specifically focusing on Gaussian background and covers various aspects.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Telecommunications
Miguel Dajer et al.
Summary: This paper surveys the latest research outcomes in the field of Reconfigurable Intelligent Surface (RIS), which has the potential to significantly enhance the performance of next-generation wireless communication networks by adapting the propagation environment. The paper focuses on several aspects that affect the commercial viability of future network deployment. It provides comprehensive summaries of practical hardware design considerations, the broad implications of artificial intelligence techniques, as well as in-depth outlooks on system models, use cases, and physical layer optimization techniques.
DIGITAL COMMUNICATIONS AND NETWORKS
(2022)
Article
Engineering, Electrical & Electronic
Stefano Buzzi et al.
Summary: This study considers the problem of target detection in a RIS-aided MIMO radar. It proposes a general signal model and suitable optimization algorithms. The performance analysis shows the benefits of using RISs and emphasizes the importance of the RIS deployment location.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Ertugrul Basar et al.
Summary: This article discusses the emerging communication technologies and the potential application of reconfigurable intelligent surfaces (RIS) in 6G wireless networks. It emphasizes the role of RIS in enhancing communication performance and compares the advantages and disadvantages of different types of RIS designs.
IEEE SIGNAL PROCESSING MAGAZINE
(2021)
Article
Engineering, Electrical & Electronic
Augusto Aubry et al.
Summary: This paper discusses the use of Reconfigurable Intelligent Surfaces (RISs) for radar surveillance in Non-Line Of Sight (N-LOS) scenarios. It describes the geometry of the scene and the new system concept, emphasizing the role played by the RIS and the development of the specific radar equation. The paper also explores data acquisition procedures, resolution issues, and analyzes the interplay among system parameters through numerical simulations.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jun Yan Dai et al.
Summary: Metasurface, with carefully designed meta-atoms, tailors electromagnetic waves controllably. Information metasurface (IM) extends its research scope to information perspective, achieving real-time programmable control of EM waves and bridging the physical and digital worlds.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Marzieh Najafi et al.
Summary: To optimize large intelligent reflecting surfaces (IRSs), a physics-based model and a scalable optimization framework are proposed in this article. By partitioning IRS unit cells into subsets and optimizing each subset in two stages, offline design and online optimization, efficiency can be improved for optimizing large IRSs.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Cunhua Pan et al.
Summary: Reconfigurable intelligent surfaces (RISs) or intelligent reflecting surfaces (IRSs) are considered as one of the most promising and revolutionizing techniques for enhancing the spectrum and energy efficiency of wireless systems by reconfiguring the wireless propagation environment through carefully tuning the phase shifts of a large number of low-cost passive reflecting elements. The article aims to address four fundamental questions and highlights eight promising research directions.
IEEE COMMUNICATIONS MAGAZINE
(2021)
Article
Computer Science, Information Systems
Long Zhao et al.
Summary: In this paper, multiple reconfigurable intelligent surfaces are utilized to control signal transmission directions in a dual-hop communication scenario for wirelessly powering nonline of sight devices. By designing the beamformer at the base station and the controllable phases of impinging signals at the RISs, the objective is to maximize the minimum harvested power among all devices. The results indicate that the suboptimal scheme can achieve about 80% of the optimal scheme's harvested power with low communication overhead between the base station and RISs.
IEEE SYSTEMS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Ruizhe Long et al.
Summary: The paper introduces a new type of RIS, called active RIS, which enhances the incoming signal by incorporating active loads to each reflecting element, in contrast to conventional passive RIS systems. However, this amplification may unintentionally boost RIS-correlated noise, requiring optimization of the reflecting coefficient matrix at the RIS and receive beamforming at the receiver to strike a balance between maximizing received signal power and minimizing RIS-related noise.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Xinyi Wang et al.
Summary: The dual-functional radar-communication (DFRC) technique is considered a promising component in emerging platforms, but waveform design limitations can lead to high multi-user interference (MUI) and degraded communication performance. Inspired by Reconfigurable Intelligent Surface (RIS) applications in mitigating MUI, this paper investigates joint waveform design and passive beamforming in RIS-assisted DFRC systems. Simulation results show that with RIS assistance, system throughput can be significantly improved and the obtained beampattern matches the target transmit beampattern better than scenarios without RIS.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Yuanwei Liu et al.
Summary: Reconfigurable intelligent surfaces, also known as intelligent reflecting surfaces or large intelligent surfaces, have attracted significant attention for their potential to enhance wireless networks by smartly reconfiguring the propagation environment. Research in this field covers operating principles, performance evaluation, beamforming design, resource management, machine learning applications, and integration with other emerging technologies for next-generation networks.
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
(2021)
Article
Engineering, Electrical & Electronic
Ahmed Elzanaty et al.
Summary: This paper discusses the localization performance limits and the impact of signal propagation conditions when using reconfigurable intelligent surfaces in smart radio environments for communication and localization. Numerical results show that the proposed scheme can achieve remarkable performance even in asynchronous signaling, with a proposed phase design that approaches the numerical optimal phase design minimizing the CRLB.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Stefano Buzzi et al.
Summary: In this work, the authors investigate target detection using a radar aided by a reconfigurable intelligent surface (RIS), analyzing the theoretical benefits and providing examples to show the potential gains of this detection architecture.
IEEE SIGNAL PROCESSING LETTERS
(2021)
Article
Telecommunications
Mohamed A. ElMossallamy et al.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2020)
Article
Engineering, Electrical & Electronic
Henk Wymeersch et al.
IEEE VEHICULAR TECHNOLOGY MAGAZINE
(2020)
Article
Engineering, Electrical & Electronic
Shuaishuai Guo et al.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2020)