Beyond Intelligent Reflecting Surfaces: Reflective-Transmissive Metasurface Aided Communications for Full-Dimensional Coverage Extension

Zhang, Shuhang; Zhang, Hongliang; Di, Boya; Tan, Yushan; Han, Zhu; Song, Lingyang

doi:10.1109/tvt.2020.3024756

Cited by 135 publications

(76 citation statements)

References 10 publications

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“…5(c). This type of RIS is also referred to as intelligent omni-surfaces (IOSs) [33]. Although the RIS is composed of multiple layers, each layer might vary for different types.…”

Section: Ris Basicsmentioning

confidence: 99%

Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface

Zhang

et al. 2021

IEEE Commun. Lett.

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In future cellular systems, wireless localization and sensing functions will be built-in for specific applications, e.g., navigation, transportation, and healthcare, and to support flexible and seamless connectivity. Driven by this trend, the need rises for fine-resolution sensing solutions and cm-level localization accuracy, while the accuracy of current wireless systems is limited by the quality of the propagation environment. Recently, with the development of new materials, reconfigurable intelligent surfaces (RISs) provide an opportunity to reshape and control the electromagnetic characteristics of the environment, which can be utilized to improve the performance of wireless sensing and localization. In this tutorial, we will first review the background and motivation to utilize wireless signals for sensing and localization. Next, we introduce how to incorporate RIS into applications of sensing and localization, including key challenges and enabling techniques, and then some case studies will be presented. Finally, future research directions will also be discussed.

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“…5(c). This type of RIS is also referred to as intelligent omni-surfaces (IOSs) [33]. Although the RIS is composed of multiple layers, each layer might vary for different types.…”

Section: Ris Basicsmentioning

confidence: 99%

Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface

Zhang

et al. 2021

IEEE Commun. Lett.

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“…In a recent development, a variant of the IRS for full dimensional coverage is presented in [59]. A drawback of the IRS system is the legitimate users has to be located on the same side of the reflective surface and any user located on the opposite side of the metasurface is out of coverage.…”

Section: ) Cell-free Massive Mimomentioning

confidence: 99%

“…A drawback of the IRS system is the legitimate users has to be located on the same side of the reflective surface and any user located on the opposite side of the metasurface is out of coverage. To address this issue, the authors presented intelligent omni-surfaces (IOS) in [59] with dual functionality of signal reflection and transmission. The IOS can reflect and transmit the incoming signals from one side towards mobile users of both sides, respectively.…”

Section: ) Cell-free Massive Mimomentioning

confidence: 99%

Physical-Layer Security in 6G Networks

Mucchi

Jayousi

Caputo

et al. 2021

IEEE Open J. Commun. Soc.

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The sixth generation (6G) of mobile network will be composed by different nodes, from macro-devices (satellite) to nano-devices (sensors inside the human body), providing a full connectivity fabric all around us. These heterogeneous nodes constitute an ultra dense network managing tons of information, often very sensitive. To trust the services provided by such network, security is a mandatory feature by design. In this scenario, physical-layer security (PLS) can act as a first line of defense, providing security even to low-resourced nodes in different environments. This paper discusses challenges, solutions and visions of PLS in beyond-5G networks.

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“…Due to this ability to suitably adjust the phase shifts according to the dynamic wireless environment. The signals reflected by the passive RIS can constructively combine with signals from other paths to boost the desired receiver Signal-to-Interference-plus-Noise Ratio (SINR), or destructively suppress signal power at undesired eavesdroppers in physical layer security (PLS) networks [1], [3], [7], [11], [12]. However, recent research in [13] and [14] demonstrated that RISs can be equipped with active reflecting elements, where each element reflects and amplifies the incident signal instead of only reflecting it as in the case of passive RIS.…”

Section: Introductionmentioning

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

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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.

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Beyond Intelligent Reflecting Surfaces: Reflective-Transmissive Metasurface Aided Communications for Full-Dimensional Coverage Extension

Cited by 135 publications

References 10 publications

Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface

Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface

Physical-Layer Security in 6G Networks

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

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