Results 91 to 100 of about 3,484 (213)

A Reconfigurable Intelligent Surface for Arbitrary mm-Wave Polarization Using Parasitic Enhancing Structures

, 2023
The design of a reconfigurable intelligent surface (RIS) for mm-waves with arbitrary polarization is proposed. At mm-wave frequencies, the RF switches needed in the RIS suffer from low isolation, and therefore a parasitic enhancing structure (PES) is ...
Zhang, Yujie, Rao, Junhui, Murch, Ross
core   +1 more source

Cascaded channel decoupling based solution for RIS regulation matrix

Intelligent and Converged Networks
This article presents a pioneering solution to address the challenges of reconfigurable intelligent surface (RIS), employing a cascaded channel decoupling strategy.
Yajun Zhao
doaj   +1 more source

Two-Timescale Design for Reconfigurable Intelligent Surface-Aided Massive MIMO Systems with Imperfect CSI

, 2021
Revision in IEEE TIT. Keywords: Reconfigurable Intelligent Surface, Intelligent Reflecting Surface, Massive MIMO, Channel estimation, etcRevision in IEEE TIT.
Zhi, K, Poor, HV, Wang, J, Elkashlan, M, Renzo, MD, Wang, K, Schober, R, Ren, H, Hanzo, L, Pan, C   +9 more
core  

Indoor Localization with Reconfigurable Intelligent Surface

, 2021
Recently, reconfigurable intelligent surface (RIS), which operates with the aim to manipulate multi-path signals, has been widely considered for wireless communications.
Ma, Teng, Xiao, Yue, Lei, Xia, Xiong, Wenhui, Ding, Yuan; id_orcid   +4 more
core   +1 more source

STAR-RIS-Assisted Millimeter-Wave Secure Communication with Multiple Eavesdroppers

Mathematics
Aiming to address the limited coverage of conventional reconfigurable intelligent surfaces (RISs), this study proposes a millimeter-wave secure communication scheme based on the simultaneously transmitting and reflecting reconfigurable intelligent ...
Binghui Qian, Jingping Qiao, Chuanting Zhang   +2 more
doaj   +1 more source

Reconfigurable Intelligent Surface-Assisted Physical Layer Security

12631268We propose a reconfigurable intelligent surface (RIS)-assisted wiretap channel, where the RIS is strategically deployed to provide a spatial separation to the transmitter, and orthogonal combiners are employed at the legitimate receiver to ...
Li, Xudong, Tohidi, Ehsan, Bjelakovic, Igor, Stanczak, Slawomir, Frey, Matthias   +4 more
core   +1 more source

Indoor Propagation Measurements with a Reconfigurable Intelligent Surface at 3.5 GHz [PDF]

This paper describes an investigation of the practical impact of a reconfigurable intelligent surface on indoor radio propagation. The evaluation is based on measurements of the instantaneous channel impulse response (CIR) between a static transmitter ...
Ying, Zhinong, Nielsen, Jesper Ødum; id_orcid, Franek, Ondrej; id_orcid   +2 more
core   +1 more source

STAR-RIS-assisted key generation method in quasi-static environment

EURASIP Journal on Wireless Communications and Networking
In this paper, we introduce a new method to solve the low-entropy problem in a quasi-static environment. We utilize a simultaneous transmission and reflection reconfigurable intelligent surface (STAR-RIS) that transmits and reflects incoming signals to ...
Yang Ma, Liquan Chen, Tianyu Lu, Yufan Song, Kailin Cao   +4 more
doaj   +1 more source

Anomalous and specular reflections of reconfigurable intelligent surfaces: configuration strategies and system performance

International audienceReconfigurable intelligent surfaces (RISs) enable wireless communication in harsh propagation conditions. In fact, when impinging on an RIS, wireless signals can be anomalously reflected, i.e., not obeying Snell’s law, to reach ...
Clemente, Antonio, Merluzzi, Mattia
core   +1 more source

A Survey of Multiple Reconfigurable Intelligent Surface Aided Systems

IEEE Access
Reconfigurable intelligent surface (RIS) can establish reflection links between base stations and users, providing high passive beamforming gain that significantly enhances the system’s achievable rate. Given the outstanding performance of RIS, we
Renjie Liang, Junjie Liang
doaj   +1 more source