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Reconfigurable intelligent surfaces (RISs) are widely considered to become an integral part of future wireless communication systems. Various methodologies exist to design such surfaces; however, most consider or require a very large number…

Optimization and Control · Mathematics 2023-09-01 Hans-Dieter Lang , Michel A. Nyffenegger , Heinz Mathis , Xingqi Zhang

As the wireless research community moves toward shaping the vision of sixth-generation (6G) networks, reconfigurable intelligent surfaces (RIS) have emerged as a promising technology for controlling the propagation environment. Although RIS…

Signal Processing · Electrical Eng. & Systems 2025-06-25 Prasetyo Putranto , Anis Amazigh Hamza , Sameh Mabrouki , Nasrullah Armi , Iyad Dayoub

Reconfigurable Intelligent Surfaces (RIS) are planar structures connected to electronic circuitry, which can be employed to steer the electromagnetic signals in a controlled manner. Through this, the signal quality and the effective data…

Information Theory · Computer Science 2021-12-21 Long Kong , Steven Kisseleff , Symeon Chatzinotas , Björn Ottersten , Melike Erol-Kantarci

Forthcoming 6G networks have two predominant features of wide coverage and sufficient computation capability. To support the promising applications, Integrated Sensing, Communication, and Computation (ISCC) has been considered as a vital…

Systems and Control · Electrical Eng. & Systems 2024-07-17 Bin Li , Wancheng Xie , Zesong Fei

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 have emerged as a promising hardware platform for shaping wireless propagation environments at millimeter-wave (mm-Wave) frequencies and beyond. While many existing studies emphasize channel modeling and…

Systems and Control · Electrical Eng. & Systems 2026-02-27 Ruiqi Wang , Pinjun Zheng , Yiming Yang , Xiarui Su , Mohammad Vaseem , Anas Chaaban , Md. Jahangir Hossain , Tareq Y. Al-Naffouri , Atif Shamim

This paper focuses on the design of transmission methods and reflection optimization for a wireless system assisted by a single or multiple reconfigurable intelligent surfaces (RISs). The existing techniques are either too complex to…

Information Theory · Computer Science 2023-09-13 Wei Jiang , Hans D. Schotten

Higher spectral and energy efficiencies are the envisioned defining characteristics of high data-rate sixth-generation (6G) wireless networks. One of the enabling technologies to meet these requirements is index modulation (IM), which…

Signal Processing · Electrical Eng. & Systems 2023-10-06 JohnA. Hodge , Kumar Vijay Mishra , Brian M. Sadler , Amir I. Zaghloul

5G radio at millimeter wave (mmWave) and beyond 5G concepts at 0.1-1 THz can exploit angle and delay measurements for localization, by the virtue of increased bandwidth and large antenna arrays but are limited in terms of blockage caused by…

Signal Processing · Electrical Eng. & Systems 2020-06-12 Henk Wymeersch , Jiguang He , Benoît Denis , Antonio Clemente , Markku Juntti

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

Reconfigurable intelligent surfaces (RIS) have emerged as a transformative technology for electromagnetic (EM) wave manipulation, offering unprecedented control over wave reflections compared to traditional metallic reflectors. By utilizing…

Signal Processing · Electrical Eng. & Systems 2025-06-11 Hossein Rezaei , Mehmet Emin Arslan , George Yammine , Niels Neumann , Norman Franchi

In this paper, we propose and study a multi-functional reconfigurable intelligent surface (MF-RIS) architecture. In contrast to conventional single-functional RIS (SF-RIS) that only reflects signals, the proposed MF-RIS simultaneously…

Signal Processing · Electrical Eng. & Systems 2023-10-05 Wen Wang , Wanli Ni , Hui Tian , Yonina C. Eldar , Rui Zhang

While the researchers have set their sights on future wireless networks of 2030, communications through reconfigurable intelligent surfaces (RISs) appears as one of the potential enabling technologies for 6G wireless networking. This…

Information Theory · Computer Science 2021-03-05 E. Basar , I. Yildirim

This letter presents a novel Reconfigurable Intelligent Surface (RIS) that features a low-profile structure, wide operating bandwidth, and continuous phase control. By incorporating a middle patch layer without introducing an additional air…

Signal Processing · Electrical Eng. & Systems 2025-05-13 Yikun Li , Yufei Zhao , Chau Yuen , Xiong Qin , Christ Clenson , Chao Du , Yong Liang Guan

Fluid reconfigurable intelligent surfaces (FRIS) extend conventional reconfigurable intelligent surfaces (RIS) by adding spatial reconfigurability through switchable apertures, pattern-reconfigurable units, fluidic conductive materials, or…

Information Theory · Computer Science 2026-05-22 Xusheng Zhu , Kai-Kit Wong , Sai Xu , Hao Xu , Wen Chen , Hyundong Shin

Reconfigurable Intelligent Surfaces (RISs) constitute a strong candidate physical-layer technology for the $6$-th Generation (6G) of wireless networks, offering new design degrees of freedom for efficiently addressing demanding performance…

Information Theory · Computer Science 2023-06-21 Konstantinos D. Katsanos , George C. Alexandropoulos

Programmable metasurfaces have garnered significant attention due to their exceptional ability to manipulate electromagnetic (EM) waves in real time, leading to the emergence of a prominent area in wireless communication, namely…

Reconfigurable Intelligent Surfaces (RIS) constitute a promising technology that could fulfill the extreme performance and capacity needs of the upcoming 6G wireless networks, by offering software-defined control over wireless propagation…

Reconfigurable intelligent surface (RIS) is a promising technology to enhance the spectral and energy efficiency in a wireless communication system. The design of the phase shifts of an RIS in every channel coherence interval demands a huge…

Signal Processing · Electrical Eng. & Systems 2024-05-15 Sadaf Syed , Dominik Semmler , Donia Ben Amor , Michael Joham , Wolfgang Utschick

In the past as well as present wireless communication systems, the wireless propagation environment is regarded as an uncontrollable black box that impairs the received signal quality, and its negative impacts are compensated for by relying…

Signal Processing · Electrical Eng. & Systems 2022-09-14 Cunhua Pan , Gui Zhou , Kangda Zhi , Sheng Hong , Tuo Wu , Yijin Pan , Hong Ren , Marco Di Renzo , A. Lee Swindlehurst , Rui Zhang , Angela Yingjun Zhang
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