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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

Research on reconfigurable intelligent surfaces (RISs) has predominantly focused on purely physical (PHY)-layer aspects, particularly, on how signals are dynamically shaped by a controllable wireless propagation environment. However,…

Signal Processing · Electrical Eng. & Systems 2026-03-03 Fabio Saggese , Victor Croisfelt , Kyriakos Stylianopoulos , George C. Alexandropoulos , Petar Popovski

Reconfigurable intelligent surfaces (RISs) have attracted increasing interest due to their ability to improve the coverage, reliability, and energy efficiency of millimeter wave (mmWave) communication systems. However, designing the RIS…

Signal Processing · Electrical Eng. & Systems 2022-11-15 Shuaifeng Jiang , Ahmed Hindy , Ahmed Alkhateeb

Near-field propagation, particularly that enabled by reconfigurable intelligent surfaces (RIS), has emerged as a promising research topic in recent years. However, a comprehensive literature review on RIS-based near-field technologies is…

Signal Processing · Electrical Eng. & Systems 2024-04-25 Yajun Zhao

Reconfigurable intelligent surface (RIS)-empowered communication is a revolutionary technology that enables to manipulate wireless propagation environment via smartly controllable low-cost reflecting surfaces. However, in order to…

Information Theory · Computer Science 2022-12-13 Zehra Yigit , Ertugrul Basar , Ibrahim Altunbas

More and more applications that require high reliability and fault tolerance are realized with wireless network architectures and thus ultimately rely on the wireless channels, which can be subject to impairments and blockages. Hence, these…

Systems and Control · Electrical Eng. & Systems 2022-11-02 Kevin Weinberger , Robert-Jeron Reifert , Aydin Sezgin , Ertugrul Basar

Recently, the reconfigurable intelligent surface (RIS), benefited from the breakthrough on the fabrication of programmable meta-material, has been speculated as one of the key enabling technologies for the future six generation (6G)…

Information Theory · Computer Science 2022-06-23 Chongwen Huang , Ronghong Mo , Chau Yuen

Orthogonal multi-user multiple-input multiple-output (MU-MIMO) channels allow for optimum performance with simplified precoding/equalization, and they achieve maximum multiplexing gain which is shared fairly among users. Reconfigurable…

Information Theory · Computer Science 2023-05-01 Juan Vidal Alegria , Fredrik Rusek

Integrated sensing and communication (ISAC) is emerging as a key enabler to address the growing spectrum congestion problem and satisfy increasing demands for ubiquitous sensing and communication. By sharing various resources and…

Signal Processing · Electrical Eng. & Systems 2022-06-20 Rang Liu , Ming Li , Honghao Luo , Qian Liu , A. Lee Swindlehurst

Challenging environments comprise a range of scenarios, which share the fact that it is extremely difficult to establish a communication link using conventional technology due to many impairments typically associated with the propagation…

Signal Processing · Electrical Eng. & Systems 2022-06-23 Steven Kisseleff , Symeon Chatzinotas , Björn Ottersten

Reconfigurable intelligent surface (RIS) is a revolutionary technology that can customize the wireless channel and improve the energy efficiency of next-generation cellular networks. This letter proposes an environment-aware codebook design…

Signal Processing · Electrical Eng. & Systems 2023-04-25 Xing Jia , Jiancheng An , Hao Liu , Hongshu Liao , Lu Gan , Chau Yuen

Users' desire for enhanced performance drive the inevitable technological progress on vertical applications in wireless communication systems. To meet these demands, researchers vigorously investigate potential 6G and beyond technologies…

Signal Processing · Electrical Eng. & Systems 2024-07-15 Emre Arslan , Ali Tugberk Dogukan , Fatih Kilinc , Ertugrul Basar

Reconfigurable intelligent surfaces (RISs) are considered a promising technology for boosting the coverage and for enhancing the spectral efficiency of wireless systems, as well as for taming the wireless environment. The potential benefits…

Information Theory · Computer Science 2021-11-23 Bjorn Sihlbom , Marios I. Poulakis , Marco Di Renzo

A Reflective Intelligent Surface (RIS) consists of many small reflective elements whose reflection properties can be adjusted to change the wireless propagation environment. Envisioned implementations require that each RIS element be…

Systems and Control · Electrical Eng. & Systems 2025-05-13 Gal Ben Itzhak , Miguel Saavedra-Melo , Benjamin Bradshaw , Ender Ayanoglu , Filippo Capolino , A. Lee Swindlehurst

As the current standardization for the 5G networks nears completion, work towards understanding the potential technologies for the 6G wireless networks is already underway. One of these potential technologies for the 6G networks are…

Signal Processing · Electrical Eng. & Systems 2020-07-17 Hamidreza Taghvaee , Akshay Jain , Xavier Timoneda , Christos Liaskos , Sergi Abadal , Eduard Alarcón , Albert Cabellos-Aparicio

This letter investigates the performance of emerging wireless communication systems assisted by a fluid reconfigurable intelligent surface (FRIS). Unlike conventional reconfigurable intelligent surfaces (RISs), an FRIS consists of…

The requirements of vehicular communications grow with increasing level of automated driving and future applications of intelligent transportation systems (ITS). Beside the ever-increasing need for high capacity radio links, reliability and…

Networking and Internet Architecture · Computer Science 2021-08-31 Karsten Heimann , Benjamin Sliwa , Manuel Patchou , Christian Wietfeld

Given its ability to control and manipulate wireless environments, reconfigurable intelligent surface (RIS), also known as intelligent reflecting surface (IRS), has emerged as a key enabler technology for the six-generation (6G) cellular…

Signal Processing · Electrical Eng. & Systems 2021-02-01 Ahmed Al-Hilo , Moataz Samir , Mohamed Elhattab , Chadi Assi , Sanaa Sharafeddine

Reconfigurable intelligent surface (RIS) can effectively control the wavefront of the impinging signals and has emerged as a cost-effective promising solution to improve the spectrum and energy efficiency of wireless systems. Most existing…

Information Theory · Computer Science 2022-06-07 Yiming Liu , Erwu Liu , Rui Wang , Binyu Lu , Zhu Han

Reconfigurable Intelligent Surfaces (RIS) have emerged as a transformative technology capable of reshaping wireless environments through dynamic manipulation of electromagnetic waves. While extensive research has explored their theoretical…

Cryptography and Security · Computer Science 2025-12-19 Ziyu Chen , Yitong Shen , Jingzhe Zhang , Yao Zheng , Yili Ren , Xuyu Wang , Shiwen Mao , Hanqing Guo