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With the development of the next generation of mobile networks, new research challenges have emerged, and new technologies have been proposed to face them. On the one hand, the reconfigurable intelligent surface (RIS) technology is being…

Signal Processing · Electrical Eng. & Systems 2021-05-26 Romain Fara , Philippe Ratajczak , Dinh-Thuy Phan Huy , Abdelwaheb Ourir , Marco Di Renzo , Julien De Rosny

Reconfigurable intelligent surface (RIS) is a type of wireless communication technology that uses a reconfigurable surface, such as a wall or building that is able to adjust its properties by an integrated optimization algorithm in order to…

Applied Physics · Physics 2023-09-25 Emanuel Colella , Luca Bastianelli , Franco Moglie , Valter Mariani Primiani

Signal processing and communication communities have witnessed the rise of many exciting communication technologies in recent years. Notable examples include alternative waveforms, massive multiple-input multiple-output (MIMO) signaling,…

Signal Processing · Electrical Eng. & Systems 2021-11-10 Ertugrul Basar , H. Vincent Poor

Reconfigurable intelligent surface (RIS)-assisted communication is a key enabling technology for next-generation wireless communication networks, allowing for the reshaping of wireless channels without requiring traditional radio frequency…

Signal Processing · Electrical Eng. & Systems 2025-11-18 Recep Vural , Aymen Khaleel , Ertugrul Basar

The increasing demand for high data rates and seamless connectivity in wireless systems has sparked significant interest in reconfigurable intelligent surfaces (RIS) and artificial intelligence-based wireless applications. RIS typically…

Machine Learning · Computer Science 2025-09-04 Pujitha Mamillapalli , Yoghitha Ramamoorthi , Abhinav Kumar , Tomoki Murakami , Tomoaki Ogawa , Yasushi Takatori

The technology of reconfigurable intelligent surfaces (RIS) has been showing promising potential in a variety of applications relying on Beyond-5G networks. Reconfigurable intelligent surface (RIS) can indeed provide fine channel…

Signal Processing · Electrical Eng. & Systems 2023-03-28 Moustafa Rahal , Benoit Denis , Kamran Keykhosravi , Musa Furkan Keskin , Bernard Uguen , George C. Alexandropoulos , Henk Wymeersch

The emerging technology of Reconfigurable Intelligent Surfaces (RISs) is provisioned as an enabler of smart wireless environments, offering a highly scalable, low-cost, hardware-efficient, and almost energy-neutral solution for dynamic…

Information Theory · Computer Science 2022-05-11 George C. Alexandropoulos , Kyriakos Stylianopoulos , Chongwen Huang , Chau Yuen , Mehdi Bennis , Mérouane Debbah

The latest discussions on the upcoming sixth Generation (6G) of wireless communications are envisioning future networks as a unified communications, sensing, and computing platform. The recently conceived concept of the smart radio…

Reconfigurable intelligent surfaces (RISs) modify signal reflections to enhance wireless communication capabilities. Classical RIS phase optimization is highly non convex and challenging in dynamic environments due to high interference and…

Systems and Control · Electrical Eng. & Systems 2026-04-21 Noha Hassan , Xavier Fernando , Halim Yanikomeroglu

The march towards 6G is accelerating and future wireless network architectures require enhanced performance along with significant coverage especially, to combat impairments on account of the wireless channel. Reconfigurable intelligent…

Signal Processing · Electrical Eng. & Systems 2023-08-16 Emre Arslan , Fatih Kilinc , Ertugrul Basar , Huseyin Arslan

Semantic communication has gained significant attention recently due to its advantages in achieving higher transmission efficiency by focusing on semantic information instead of bit-level information. However, current AI-based semantic…

Signal Processing · Electrical Eng. & Systems 2023-12-04 Shuyi Chen , Yingzhe Hui , Yifan Qin , Yueyi Yuan , Weixiao Meng , Xuewen Luo , Hsiao-Hwa Chen

A communication link aided by a Reconfigurable Intelligent Surface (RIS) is studied, in which the transmitter can control the state of the RIS via a finite-rate control link. Prior work mostly assumed a fixed RIS configuration irrespective…

Information Theory · Computer Science 2019-11-22 Roy Karasik , Osvaldo Simeone , Marco Di Renzo , Shlomo Shamai

Reconfigurable Intelligent Surfaces (RISs) are becoming one of the fundamental building blocks of next-generation wireless communication systems. To that end, RIS phase configuration optimization is an important issue, where finding the…

Signal Processing · Electrical Eng. & Systems 2023-08-07 Samed Keşir , M. Yaser Yağan , İbrahim Hökelek , Ali Emre Pusane , Ali Görçin

Future wireless communications are promising to support ubiquitous connections and high data rates with cost-effective devices. Benefiting from the energy-efficient elements with low cost, reconfigurable intelligent surface (RIS) emerges as…

Information Theory · Computer Science 2024-07-19 Xiao Zheng , Wenchi Cheng , Jingqing Wang , Wei Zhang

Conventional Reconfigurable intelligent surfaces (RIS) for wireless communications have a local position-dependent (phase-gradient) scattering response on the surface. We consider more general RIS structures, called nonlocal (or…

Information Theory · Computer Science 2024-04-04 Amine Mezghani , Faouzi Bellili , Ekram Hossain

Reconfigurable intelligent surfaces (RISs) are regarded as a promising emerging hardware technology to improve the spectrum and energy efficiency of wireless networks by artificially reconfiguring the propagation environment of…

Information Theory · Computer Science 2020-08-18 Xiaojun Yuan , Ying-Jun Angela Zhang , Yuanming Shi , Wenjing Yan , Hang Liu

Reconfigurable intelligent surfaces (RISs) have emerged as a promising solution that can provide dynamic control over the propagation of electromagnetic waves. The RIS technology is envisioned as a key enabler of sixth-generation networks…

Signal Processing · Electrical Eng. & Systems 2025-02-26 Ishan Koralege , Arthur S. de Sena , Nurul H. Mahmood , Farjam Karim , Dimuthu Lesthuruge , Samitha Gunarathne

Reconfigurable intelligent surfaces (RISs) have a revolutionary capability to customize the radio propagation environment for wireless networks. To fully exploit the advantages of RISs in wireless systems, the phases of the reflecting…

Machine Learning · Computer Science 2022-04-29 Zongze Li , Shuai Wang , Qingfeng Lin , Yang Li , Miaowen Wen , Yik-Chung Wu , H. Vincent Poor

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

The advent of the sixth generation (6G) wireless networks heralds a transformative era for mobile communication, where the integration of cutting-edge technologies like Reconfigurable Intelligent Surfaces (RISs) is paramount in addressing…

Signal Processing · Electrical Eng. & Systems 2024-07-09 Emre Arslan , Ali Tugberk Dogukan , Fatih Kilinc , Ahmet Faruk Coskun , Ertugrul Basar