The latest discussions on upcoming 6G wireless communications are envisioning future networks as a unified communications, sensing, and computing platform. recently conceived concept of the smart radio environment, enabled by reconfigurable intelligent surfaces (RISs), contributes toward this vision, offering programmable propagation information-bearing signals. Typical RIS implementations include metasurfaces with almost passive unit elements capable reflecting their incident waves in...

Abstract Reconfigurable reflective surfaces can alter the propagation environment to improve wireless communication and power transfer. Paramount this operation—which has attracted much attention recently—is assumption that surface prior knowledge of environment, for example, direction/location transmitter intended receiver(s). To address need, we propose a reconfigurable metasurface with integrated sensing capabilities. By modifying tunable meta-atoms constituting metasurface, couple small...

The latest discussions on the upcoming sixth Generation (6G) of wireless communications are envisioning future networks as a unified communications, sensing, and computing platform. recently conceived concept smart radio environment, enabled by Reconfigurable Intelligent Surfaces (RISs), contributes towards this vision offering programmable propagation information-bearing signals. Typical RIS implementations include metasurfaces with almost passive unit elements capable reflecting their...

Reconfigurable Intelligent Surfaces (RISs) are envisioned to play a key role in future wireless communications, enabling programmable radio propagation environments. They usually considered as almost passive planar structures that operate adjustable reflectors, giving rise multitude of implementation challenges, including the inherent difficulty estimating underlying channels. In this paper, we focus on recently conceived concept Hybrid (HRISs), which do not solely reflect impinging waveform...

Reconfigurable reflective surfaces can form prescribed radiation patterns given a known incident signal, capability with widespread use for beamforming in radar and imaging systems or altering the propagation environment wireless communication networks. For to operate intelligently, they need acquire relevant information about reflection directions autonomously. Toward this goal, we design metasurface that generate reconfigurable as well perform compressive sensing of signals, allowing it...

Acquiring information about the surrounding environment is crucial for reconfigurable intelligent surfaces (RISs) to effectively manipulate radio wave propagation. This operation can be fully automated by incorporating an integrated sensing mechanism, leading a hybrid configuration known as surface (HRIS). Several HRIS geometries have been studied in previous works, with full-wave simulations used showcase their capabilities. However, these simulated models often fail address practical...

Reconfigurable Intelligent Surfaces (RISs) are envisioned to play a key role in future wireless communications, enabling programmable radio propagation environments. They usually considered as nearly passive planar structures that operate adjustable reflectors, giving rise multitude of implementation challenges, including an inherent difficulty estimating the underlying channels. In this paper, we propose concept Hybrid RISs (HRISs), which do not solely reflect impinging waveform...

Detecting the angle of arrival (AoA) electromagnetic waves is an important function in a variety applications, such as navigation and wireless communication. In this letter, we propose conformal metasurface antenna (CMA) for detecting AoA horizontal plane. This structure consists waveguide with its upper conductor wall fashioned metamaterial radiators. The resonance frequencies radiators are selected randomly over band operation. random distribution results patterns that change frequency...

Reconfigurable reflective metasurfaces—or reconfigurable intelligent surfaces (RISs)—can redirect incident signals toward desired directions, an ability that allows for sculpting wireless communication channels with characteristics. This smart radio environment, however, necessitates the information about transmitter(s) and receiver(s) to be available at RIS. One possible solution this need is add sensing capability However, complex (i.e., both amplitude phase) often requires complicated...

Owing to the ability of reconfigurable intelligent surfaces (RISs) control propagation environment in their vicinity, they have emerged as an appealing solution enhance performance next-generation wireless networks. While effectiveness RISs with complete channel state information (CSI) is well-documented, limited user remains less explored. This particularly pronounced when RIS interferes nodes a potentially non-cooperating network, making CSI acquisition challenging. paper focuses on such...

Future wireless networks are envisioned to benefit from adaptive electromagnetic wave propagation by leveraging reconfigurable intelligent surfaces (RISs) that programmably redirect signals toward intended users. This environment is only possible when the directions of transmitters and receivers with respect RISs known. information can be efficiently retrieved using hybrid (HRISs) sense a portion incident signal. However, HRIS structures most beneficial integrated sensing circuitry...

Reconfigurable Intelligent Surfaces (RISs) are envisioned to play a key role in future wireless communications, enabling programmable radio propagation environments. They usually considered as nearly passive planar structures that operate adjustable reflectors, giving rise multitude of implementation challenges, including an inherent difficulty estimating the underlying channels. In this paper, we propose concept Hybrid RISs (HRISs), which do not solely reflect impinging waveform...

Reconfigurable Intelligent Surfaces (RISs) are envisioned to play a key role in future wireless communications, enabling programmable radio propagation environments. They usually considered as almost passive planar structures that operate adjustable reflectors, giving rise multitude of implementation challenges, including the inherent difficulty estimating underlying channels. In this paper, we focus on recently conceived concept Hybrid (HRISs), which do not solely reflect impinging waveform...