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Reconfigurable intelligent surfaces (RISs) are an emerging technology for enhancing the performance of wireless networks at a low and affordable cost, complexity, and power consumption. We introduce an algorithm for optimizing a…

Information Theory · Computer Science 2020-12-01 Xuewen Qian , Marco Di Renzo

As a novel approach to flexibly adjust the wireless environment, reconfigurable intelligent surfaces (RIS) have shown significant application potential across various domains, including wireless communication, radar detection, and the…

Applied Physics · Physics 2025-02-26 Zhen Zhang , Qiang Chen

The reconfigurable intelligent surface (RIS) is an emerging technology that changes how wireless networks are perceived, therefore its potential benefits and applications are currently under intense research and investigation. In this…

Information Theory · Computer Science 2023-05-18 Placido Mursia , Sendy Phang , Vincenzo Sciancalepore , Gabriele Gradoni , Marco Di Renzo

In this paper, we study the problem of promptly detecting the presence of non-cooperative activity from one or more Reconfigurable Intelligent Surfaces (RISs) with unknown characteristics lying in the vicinity of a Multiple-Input…

Networking and Internet Architecture · Computer Science 2024-11-06 George Stamatelis , Panagiotis Gavriilidis , Aymen Fakhreddine , George C. Alexandropoulos

Downlink reconfigurable intelligent surface (RIS)-assisted multi-input-multi-output (MIMO) systems are considered with far-field, near-field, and hybrid-far-near-field channels. According to the angular or distance information contained in…

Information Theory · Computer Science 2023-10-03 Suyu Lv , Yuanwei Liu , Xiaodong Xu , Arumugam Nallanathan , A. Lee Swindlehurst

Reconfigurable intelligent surface (RIS) is considered as an extraordinarily promising technology to solve the blockage problem of millimeter wave (mmWave) communications owing to its capable of establishing a reconfigurable wireless…

Information Theory · Computer Science 2022-02-22 Yuqian Zhu , Ming Li , Yang Liu , Qian Liu , Zheng Chang , Yulin Hu

Reconfigurable Intelligent Surfaces (RIS) have emerged as a transformative technology in wireless communications, offering unprecedented control over signal propagation. This study focuses on passive beyond diagonal reconfigurable…

Signal Processing · Electrical Eng. & Systems 2025-12-10 Ainna Yue Moreno-Locubiche , Josep Vidal

Reconfigurable intelligent surfaces (RIS) is a promising solution to build a programmable wireless environment via steering the incident signal in fully customizable ways with reconfigurable passive elements. In this paper, we consider a…

Signal Processing · Electrical Eng. & Systems 2019-12-30 Huayan Guo , Ying-Chang Liang , Jie Chen , Erik G. Larsson

This paper proposes a novel reconfigurable intelligent surface (RIS)-assisted generalized receive quadrature spatial modulation (RIS-GRQSM) scheme to enhance the spectral efficiency (SE) of RIS-aided \textit{quadrature} spatial modulation…

Information Theory · Computer Science 2025-12-09 Mohamad H. Dinan , Khatereh Nadali , Mark F. Flanagan

In this paper, we propose a novel algorithm for energy-efficient, low-latency, accurate inference at the wireless edge, in the context of 6G networks endowed with reconfigurable intelligent surfaces (RISs). We consider a scenario where new…

Information Theory · Computer Science 2023-05-19 Kyriakos Stylianopoulos , Mattia Merluzzi , Paolo Di Lorenzo , George C. Alexandropoulos

Reconfigurable intelligent surfaces (RISs) are gaining traction for their ability to reshape wireless environments with low energy consumption. However, prior studies primarily explore single-RIS deployments with static or semi-static…

Information Theory · Computer Science 2025-11-25 Ferhat Bayar , Haci Ilhan , Erdogan Aydin

The advantages of millimeter-wave and large antenna arrays technologies for accurate wireless localization received extensive attentions recently. However, how to further improve the accuracy of wireless localization, even in the case of…

Information Theory · Computer Science 2020-09-17 Yiming Liu , Erwu Liu , Rui Wang

Cell-Free Massive multiple-input multiple-output (MIMO) and reconfigurable intelligent surface (RIS) are two promising technologies for application to beyond-5G networks. This paper considers Cell-Free Massive MIMO systems with the…

Information Theory · Computer Science 2021-12-20 Trinh Van Chien , Hien Quoc Ngo , Symeon Chatzinotas , Marco Di Renzo , Björn Ottersten

Future wireless networks require the ability to actively adjust the wireless environment to meet strict performance indicators. Reconfigurable Intelligent Surface (RIS) technology is gaining attention for its advantages of low power…

Information Theory · Computer Science 2024-10-28 De-Ming Chian , Chao-Kai Wen , Chi-Hung Wu , Fu-Kang Wang , Kai-Kit Wong

This paper studies an Internet-of-Things (IoT) network employing a reconfigurable intelligent surface (RIS) over generalized fading channels. Inspired by the promising potential of RIS-based transmission, we investigate a RIS-enabled IoT…

Signal Processing · Electrical Eng. & Systems 2019-12-16 Abubakar U. Makarfi , Khaled M. Rabie , Omprakash Kaiwartya , Osamah S. Badarneh , Xingwang Li , Rupak Kharel

Reconfigurable intelligent surface (RIS) has been identified as a promising technology for future wireless communication systems due to its ability to manipulate the propagation environment intelligently. RIS is a frequency-selective…

Signal Processing · Electrical Eng. & Systems 2024-08-06 Abdelhamid Salem , Kai-Kit Wong , Chan-Byoung Chae , Yangyang Zhang

Reconfigurable Intelligent Surfaces (RISs) offer a promising means of reshaping the wireless propagation environment, yet practical methods for configuring large passive arrays to achieve reliable signal equalization remain limited.…

Information Theory · Computer Science 2026-03-04 Gal Ben-Itzhak , Ender Ayanoglu

This paper studies a beam tracking problem in which an access point (AP), in collaboration with a reconfigurable intelligent surface (RIS), dynamically adjusts its downlink beamformers and the reflection pattern at the RIS in order to…

Signal Processing · Electrical Eng. & Systems 2024-11-13 Han Han , Tao Jiang , Wei Yu

We consider a two--tile reconfigurable intelligent surface (RIS) assisted wireless network with a two-antenna transmitter and receiver over Rayleigh fading. We show that the average received signal-to-noise-ratio (SNR) optimal transmission…

Information Theory · Computer Science 2020-10-12 Prathapasinghe Dharmawansa , Saman Atapattu , Marco Di Renzo

The advent of reconfigurable intelligent surfaces(RISs) brings along significant improvements for wireless technology on the verge of beyond-fifth-generation networks (B5G).The proven flexibility in influencing the propagation environment…

Networking and Internet Architecture · Computer Science 2023-10-17 Guillermo Encinas-Lago , Antonio Albanese , Vincenzo Sciancalepore , Marco Di Renzo , Xavier Costa-Pérez
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