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The concept of fluid reconfigurable intelligent surface (FRIS) upgrades the conventional reconfigurable intelligent surface (RIS) paradigm by empowering its reflecting elements with positioning reconfigurability. This letter aims to…

Information Theory · Computer Science 2025-11-21 Xusheng Zhu , Kai-Kit Wong , Boyi Tang , Wen Chen , Chan-Byoung Chae

This paper explores the use of reconfigurable intelligent surfaces (RIS) in mitigating cross-system interference in spectrum sharing and secure wireless applications. Unlike conventional RIS that can only adjust the phase of the incoming…

Information Theory · Computer Science 2023-07-03 Fangzhou Wang , A. Lee Swindlehurst

In this paper, we consider a single-anchor localization system assisted by a reconfigurable intelligent surface (RIS), where the objective is to localize multiple user equipments (UEs) placed in the radiative near-field region of the RIS by…

Signal Processing · Electrical Eng. & Systems 2024-09-24 Parisa Ramezani , Alva Kosasih , Emil Björnson

Reconfigurable intelligent surfaces (RISs) allow controlling the propagation environment in wireless networks by tuning multiple reflecting elements. RISs have been traditionally realized through single connected architectures,…

Information Theory · Computer Science 2023-06-16 Matteo Nerini , Shanpu Shen , Bruno Clerckx

This paper considers an intelligent reflecting surface (IRS)-assisted bi-static localization architecture for the sixth-generation (6G) integrated sensing and communication (ISAC) network. The system consists of a transmit user, a receive…

Signal Processing · Electrical Eng. & Systems 2025-02-05 Weifeng Zhu , Qipeng Wang , Shuowen Zhang , Boya Di , Liang Liu , Yonina C. Eldar

This paper investigates the problem of high-precision target localization in integrated sensing and communication (ISAC) systems, where the target is sensed via both a direct path and a reconfigurable intelligent surface (RIS)-assisted…

Signal Processing · Electrical Eng. & Systems 2026-02-17 Huyen-Trang Ta , Ngoc-Son Duong , Trung-Hieu Nguyen , Van-Linh Nguyen , Thai-Mai Dinh

In this paper, we survey state-of-the-art research outcomes in the burgeoning field of reconfigurable intelligent surface (RIS) in view of its potential for significant performance enhancement for next generation wireless communication…

Signal Processing · Electrical Eng. & Systems 2020-10-16 Miguel Dajer , Zhengxiang Ma , Leonard Piazzi , Narayan Prasad , Xiao-Feng Qi , Baoling Sheen , Jin Yang , Guosen Yue

Extensive research has already started on 6G and beyond wireless technologies due to the envisioned new use-cases and potential new requirements for future wireless networks. Although a plethora of modern physical layer solutions have been…

Signal Processing · Electrical Eng. & Systems 2021-08-18 Ertugrul Basar

Intelligent reflecting surface (IRS) is envisioned to have abundant applications in future wireless networks by smartly reconfiguring the signal propagation for performance enhancement. Specifically, an IRS consists of a large number of…

Information Theory · Computer Science 2018-09-13 Qingqing Wu , Rui Zhang

Amodal sensing is critical for various real-world sensing applications because it can recover the complete shapes of partially occluded objects in complex environments. Among various amodal sensing paradigms, wireless amodal sensing is a…

Signal Processing · Electrical Eng. & Systems 2026-02-03 Yuhan Wang , Haobo Zhang , Qingyu Liu , Hongliang Zhang , Lingyang Song

The massive number of antennas in extremely large aperture array (ELAA) systems shifts the propagation regime of signals in internet of things (IoT) communication systems towards near-field spherical wave propagation. We propose a…

Signal Processing · Electrical Eng. & Systems 2025-04-18 Quan Zhou , Jingjing Zhao , Kaiquan Cai , Yanbo Zhu

The transition toward 6G networks demands energy-efficient hardware capable of active interaction with the environment. Reconfigurable Intelligent Surfaces (RIS) have emerged as a key technology for Integrated Sensing and Communications…

Signal Processing · Electrical Eng. & Systems 2026-04-15 Sergio Micó-Rosa , Alvaro Villaescusa-Tebar , Saúl Fenollosa , Carlos Villena-Jiménez , Monika Drozdowska , Narcis Cardona

Until now, researchers in wireless communications have mainly focused their attention on slowly time-varying designs of reconfigurable intelligent surfaces (RISs), where the spatial-phase gradient across the RIS is varied at the rate equal…

Signal Processing · Electrical Eng. & Systems 2024-01-30 Francesco Verde , Donatella Darsena , Vincenzo Galdi

Reconfigurable intelligent surface (RIS) is a newly-emerged technology that might fundamentally change how wireless networks are operated. Though extensively studied in recent years, the practical limitations of RIS are often neglected when…

Signal Processing · Electrical Eng. & Systems 2023-12-12 Parisa Ramezani , Yasaman Khorsandmanesh , Emil Björnson

Reconfigurable Intelligent Surfaces (RISs) constitute a promising emerging technology that enables wireless systems to control the propagation environment to enhance diverse communication objectives. To mitigate double-fading attenuation in…

Signal Processing · Electrical Eng. & Systems 2025-04-01 Panagiotis Gavriilidis , Deepak Mishra , Besma Smida , Ertugrul Basar , Chau Yuen , George C. Alexandropoulos

This paper addresses an uplink localization problem in which a base station (BS) aims to locate a remote user with the help of reconfigurable intelligent surfaces (RISs). We propose a strategy in which the user transmits pilots sequentially…

Information Theory · Computer Science 2023-12-19 Zhongze Zhang , Tao Jiang , Wei Yu

In this work, we investigate a reconfigurable intelligent surface (RIS) aided integrated sensing and communication scenario, where a base station (BS) communicates with multiple devices in a full-duplex mode, and senses the positions of…

Signal Processing · Electrical Eng. & Systems 2022-08-16 Zhichao Shao , Xiaojun Yuan , Wei Zhang , Marco Di Renzo

Reconfigurable intelligent surface (RIS) has drawn considerable attention from the research society recently, which creates favorable propagation conditions by controlling the phase shifts of the reflected waves at the surface, thereby…

Information Theory · Computer Science 2019-11-01 Boya Di , Hongliang Zhang , Lingyang Song , Yonghui Li , Zhu Han , H. Vincent Poor

Reconfigurable intelligent surfaces (RISs) bring various benefits to the current and upcoming wireless networks, including enhanced spectrum and energy efficiency, soft handover, transmission reliability, and even localization accuracy.…

Signal Processing · Electrical Eng. & Systems 2023-10-03 Jiguang He , Aymen Fakhreddine , Arthur S. de Sena , Yu Tian , Merouane Debbah

The envisioned sixth-generation (6G) of wireless networks will involve an intelligent integration of communications and computing, thereby meeting the urgent demands of diverse applications. To realize the concept of the smart radio…

Signal Processing · Electrical Eng. & Systems 2022-10-04 Bo Yang , Xuelin Cao , Jindan Xu , Chongwen Huang , George C. Alexandropoulos , Linglong Dai , M'erouane Debbah , H. Vincent Poor , Chau Yuen