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Reconfigurable intelligent surface (RIS) can improve the communications between a source and a destination. Recently, continuous aperture RIS is proved to have better communication performance than discrete aperture RIS and has received…

Signal Processing · Electrical Eng. & Systems 2022-10-04 Yuhua Jiang , Feifei Gao , Mengnan Jian , Shun Zhang , Wei Zhang

Reconfigurable intelligent surfaces (RISs), also known as intelligent reflecting surfaces (IRSs), or large intelligent surfaces (LISs), have received significant attention for their potential to enhance the capacity and coverage of wireless…

Signal Processing · Electrical Eng. & Systems 2021-05-05 Yuanwei Liu , Xiao Liu , Xidong Mu , Tianwei Hou , Jiaqi Xu , Marco Di Renzo , Naofal Al-Dhahir

Millimeter-wave (mmWave) positioning has emerged as a promising technology for next-generation intelligent systems. The advent of reconfigurable intelligent surfaces (RISs) has revolutionized high-precision mmWave localization by enabling…

Signal Processing · Electrical Eng. & Systems 2026-04-23 Xin Cheng , Yuqing Yang , Guangjie Han , Menglu Li , Ruoguang Li , Feng Shu

A point-to-point movable element (ME) enabled reconfigurable intelligent surface (ME-RIS) communication system is investigated, where each element position can be flexibly adjusted to create favorable channel conditions. For maximizing the…

Signal Processing · Electrical Eng. & Systems 2025-03-20 Jingjing Zhao , Qingyi Huang , Kaiquan Cai , Quan Zhou , Xidong Mu , Yuanwei Liu

Indoor wireless simultaneous localization and mapping (SLAM) is considered as a promising technique to provide positioning services in future 6G systems. However, the accuracy of traditional wireless SLAM system heavily relies on the…

Signal Processing · Electrical Eng. & Systems 2021-07-06 Ziang Yang , Haobo Zhang , Boya Di , Hongliang Zhang , Kaigui Bian , Lingyang Song

Exploiting wavefront curvature enables localization with limited infrastructure and hardware complexity. With the introduction of reconfigurable intelligent surfaces (RISs), new opportunities arise, in particular when the RIS is functioning…

This study explores the use of non-line-of-sight (NLOS) components in millimeter-wave (mmWave) communication systems for joint localization and environment sensing. The radar cross section (RCS) of a reconfigurable intelligent surface (RIS)…

Information Theory · Computer Science 2023-05-23 Yixuan Huang , Jie Yang , Wankai Tang , Chao-Kai Wen , Shuqiang Xia , Shi Jin

Reconfigurable intelligent surfaces (RISs) enable reliable low-latency millimeter wave (mmWave) communication links in cases of a blocked line-of-sight (LoS) between the base station (BS) and the user equipment (UE), i.e. a RIS mounted on a…

Systems and Control · Electrical Eng. & Systems 2024-02-13 Hamed Radpour , Markus Hofer , David Loschenbrand , Lukas Walter Mayer , Andreas Hofmann , Martin Schiefer , Thomas Zemen

Reconfigurable intelligent surface (RIS) is a two-dimensional periodic structure integrated with a large number of reflective elements, which can manipulate electromagnetic waves in a digital way, offering great potentials for wireless…

Machine Learning · Computer Science 2025-01-22 Zhen Zhang , Jun Hui Qiu , Jun Wei Zhang , Hui Dong Li , Dong Tang , Qiang Cheng , Wei Lin

Reconfigurable intelligent surfaces (RISs) are one of the most promising technological enablers of the next (6th) generation of wireless systems. In this paper, we introduce a novel use-case of the RIS technology in radio localization,…

Signal Processing · Electrical Eng. & Systems 2022-02-24 Kamran Keykhosravi , Gonzalo Seco-Granados , George C. Alexandropoulos , Henk Wymeersch

In this paper, we use a reconfigurable intelligent surface (RIS) to enhance the radar sensing and communication capabilities of a mmWave dual function radar communication system. To simultaneously localize the target and to serve the user,…

Signal Processing · Electrical Eng. & Systems 2021-05-06 R. S. Prasobh Sankar , Battu Deepak , Sundeep Prabhakar Chepuri

Reconfigurable intelligent surfaces (RISs) are envisioned as a key enabler for next-generation wireless networks, offering programmable control over propagation environments. While extensive research focuses on planar RIS architectures,…

Signal Processing · Electrical Eng. & Systems 2026-02-16 Mohamadreza Delbari , Ehsan Mohammadi , Mostafa Darabi , Arash Asadi , Alejandro Jiménez-Sáez , Vahid Jamali

Reconfigurable Intelligent Surface (RIS) or metasurface is one of the important enabling technologies in mobile cellular networks that can effectively enhance the signal coverage performance in obstructed regions, and it is generally…

Signal Processing · Electrical Eng. & Systems 2023-11-06 Tianqi Xiang , Zhiwei Jiang , Weijun Hong , Xin Zhang , Yuehong Gao

Visible Light Communication (VLC) is a promising solution to address the growing demand for wireless data, leveraging the widespread use of light-emitting diodes (LEDs) as transmitters. However, its deployment is challenged by link…

Signal Processing · Electrical Eng. & Systems 2025-05-16 Borja Genoves Guzman , Maïté Brandt-Pearce

This letter investigates an uplink pilot-based wireless indoor localization problem in a multipath environment for a single-input single-output (SISO) narrowband communication system aided by reconfigurable intelligent surface (RIS). The…

Signal Processing · Electrical Eng. & Systems 2024-07-10 Yinghan Li , Wei Yu

Reconfigurable intelligent surfaces (RISs) are expected to be a main component of future 6G networks, due to their capability to create a controllable wireless environment, and achieve extended coverage and improved localization accuracy.…

Signal Processing · Electrical Eng. & Systems 2025-02-27 Mustafa Ammous , Hui Chen , Henk Wymeersch , Shahrokh Valaee

This article presents a novel approach of using reconfigurable intelligent surfaces (RISs) in the transmitter of indoor visible light communication (VLC) systems to enhance data rate uniformity and maintain adequate illumination. In this…

Signal Processing · Electrical Eng. & Systems 2023-08-22 Sylvester Aboagye , Telex M. N. Ngatched , Alain R. Ndjiongue , Octavia A. Dobre , Hyundong Shin

We consider reconfigurable intelligent surface (RIS) aided sixth-generation (6G) terahertz (THz) communications for indoor environment in which a base station (BS) wishes to send independent messages to its serving users with the help of…

Information Theory · Computer Science 2023-03-22 Najam Us Saqib , Shumei Hou , Sung Ho Chae , Sang-Woon Jeon

Reconfigurable Intelligent Surface (RIS) plays a pivotal role in the sixth generation networks to enhance communication rate and localization accuracy. In this letter, we propose a positioning algorithm in a RIS-assisted environment, where…

Signal Processing · Electrical Eng. & Systems 2024-07-10 Sajjad Ghiasvand , Arash Nasri , Ali H. Abdollahi Bafghi , Masoumeh Nasiri-Kenari

Reconfigurable intelligent surface (RIS)-assisted communication appears as one of the potential enablers for sixth generation (6G) wireless networks by providing a new degree of freedom in the system design to telecom operators.…

Signal Processing · Electrical Eng. & Systems 2021-09-21 E. Basar , I. Yildirim , F. Kilinc