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Reconfigurable intelligent surface (RIS) has been widely discussed as new technology to improve wireless communication performance. Based on the unique design of RIS, its elements can reflect, refract, absorb, or focus the incoming waves…

Signal Processing · Electrical Eng. & Systems 2020-09-03 Salah Eddine Zegrar , Liza Afeef , Huseyin Arslan

This chapter overviews the concept of Smart Wireless Environments (SWEs) motivated by the emerging technology of Reconfigurable Intelligent Surfaces (RISs). The operating principles and state-of-the-art hardware architectures of…

Signal Processing · Electrical Eng. & Systems 2025-12-23 George C. Alexandropoulos , Kostantinos D. Katsanos , George Stamatelis , Ioannis Gavras

Reconfigurable intelligent surface (RIS)-empowered communications is on the rise and is a promising technology envisioned to aid in 6G and beyond wireless communication networks. RISs can manipulate impinging waves through their…

Signal Processing · Electrical Eng. & Systems 2022-05-19 Emre Arslan , Ibrahim Yildirim , Fatih Kilinc , Ertugrul Basar

Reconfigurable Intelligent Surfaces (RISs) promise improved, secure and more efficient wireless communications. We propose and demonstrate how to exploit the diversity offered by RISs to generate and select easily differentiable radio maps…

Signal Processing · Electrical Eng. & Systems 2020-10-08 Cam Ly Nguyen , Orestis Georgiou , Gabriele Gradoni

Ongoing discussions about the future of wireless communications are reaching a turning point as standardization activities for the sixth generation of mobile networks (6G) become more mature. New technologies must now face renewed scrutiny…

Signal Processing · Electrical Eng. & Systems 2025-12-05 Pedro H. C. de Souza , Luiz A. M. Pereira , Faustino R. Gómez , Elsa M. Materón , Jorge Ricardo Mejía-Salazar

Next generation wireless networks require more stringent performance levels. New technologies such as Reconfigurable intelligent surfaces (RISs) and rate-splitting multiple access (RSMA) are candidates for meeting some of the performance…

Networking and Internet Architecture · Computer Science 2024-04-11 Ibrahim Aboumahmoud , Ekram Hossain , \\Amine Mezghani

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 surfaces (RISs) are envisioned as a promising technology for future wireless communications. With various hardware realizations, RISs can work under different modes (reflective/transmissive/hybrid) or have…

Information Theory · Computer Science 2022-08-08 Hongyu Li , Shanpu Shen , Bruno Clerckx

Recent years have seen rapid deployment of mobile computing and Internet of Things (IoT) networks, which can be mostly attributed to the increasing communication and sensing capabilities of wireless systems. Big data analysis, pervasive…

Networking and Internet Architecture · Computer Science 2023-02-17 Dinh C. Nguyen , Peng Cheng , Ming Ding , David Lopez-Perez , Pubudu N. Pathirana , Jun Li , Aruna Seneviratne , Yonghui Li , H. Vincent Poor

The ever-growing popularity and rapid improving of artificial intelligence (AI) have raised rethinking on the evolution of wireless networks. Mobile edge computing (MEC) provides a natural platform for AI applications since it provides rich…

Information Theory · Computer Science 2021-02-08 Shanfeng Huang , Shuai Wang , Rui Wang , Miaowen Wen , Kaibin Huang

Reconfigurable intelligent surface (RIS) has been regarded as a revolutionary and promising technology owing to its powerful feature of adaptively shaping wireless propagation environment. However, as a frequency-selective device, the RIS…

Signal Processing · Electrical Eng. & Systems 2021-06-29 Sifan Liu , Pengfei Ni , Rang Liu , Yang Liu , Ming Li , Qian Liu

The anticipated integration of large artificial intelligence (AI) models with wireless communications is estimated to usher a transformative wave in the forthcoming information age. As wireless networks grow in complexity, the traditional…

Information Theory · Computer Science 2026-01-13 Chong Huang , Gaojie Chen , Pei Xiao , Zhu Han , Rahim Tafazolli

It is expected that scholars will continuously strengthen the depth and breadth of theoretical research on RIS, and provide a higher theoretical upper bound for the engineering application of RIS. While making breakthroughs in academic…

Signal Processing · Electrical Eng. & Systems 2023-12-05 Yajun Zhao , Xin Lv

Future wireless communications look forward to constructing a ubiquitous intelligent information network with high data rates through cost-efficient devices. Benefiting from the tunability and programmability of metamaterials, the…

Signal Processing · Electrical Eng. & Systems 2021-12-14 Ruoqi Deng , Boya Di , Hongliang Zhang , Dusit Niyato , Zhu Han , H. Vincent Poor , Lingyang Song

Reconfigurable Intelligent Surfaces (RISs) have emerged as a promising technology for next-generation wireless communications, offering energy-efficient control of electromagnetic (EM) waves. While conventional RIS models based on phase…

Information Theory · Computer Science 2025-08-12 Ayane Lebeta Goshu , Placido Mursia , Vincenzo Sciancalepore , Marco Di Renzo , Xavier Costa-Pérez

RIS is one of the significant technological advancements that will mark next-generation wireless. RIS technology also opens up the possibility of new security threats, since the reflection of impinging signals can be used for malicious…

Cryptography and Security · Computer Science 2024-10-28 Jacek Kibilda , Nurul H. Mahmood , André Gomes , Matti Latva-aho , Luiz A. DaSilva

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

Reconfigurable intelligent surfaces (RIS) have recently received significant attention as building blocks for smart radio environments and adaptable wireless channels. By altering the space- and time-varying electromagnetic (EM) properties,…

Applied Physics · Physics 2021-01-25 John A. Hodge , Kumar Vijay Mishra , Amir I. Zaghloul

Reconfigurable intelligent surfaces (RISs) have been considered as a promising technology for the sixth-generation (6G) wireless networks that can control wireless channels in a desirable way and significantly enhance the network…

Networking and Internet Architecture · Computer Science 2022-12-05 Waqas Khalid , Zeeshan Kaleem , Rehmat Ullah , Trinh Van Chien , Song Noh , Heejung Yu

Wireless communications are nowadays shifting to higher operation frequencies with the aim to meet the ever-increasing demand for bandwidth. While reconfigurable intelligent surfaces (RISs) are usually envisioned to restore the…

Signal Processing · Electrical Eng. & Systems 2024-05-02 Giorgos Stratidakis , Sotiris Droulias , Angeliki Alexiou