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Reconfigurable Intelligent Surfaces (RIS) are considered a key enabler to achieve the vision of Smart Radio Environments, where the propagation environment can be programmed and controlled to enhance the efficiency of wireless systems.…

Networking and Internet Architecture · Computer Science 2023-01-24 Charbel Bou Chaaya , Mohamad Assaad , Tijani Chahed

Reconfigurable intelligent surface (RIS) technology has emerged as a promising enabler for next-generation wireless networks, offering a paradigm shift from passive environments to programmable radio wave propagation. Despite the potential…

Emerging Technologies · Computer Science 2025-02-07 Wali Ullah Khan , Chandan Kumar Sheemar , Eva Lagunas , Symeon Chatzinotas

The reconfigurable intelligent surface (RIS) technology is a potential solution to enhance network capacity and coverage without significant investment in additional infrastructure in 6G networks. This work highlights the interest of the…

Reconfigurable intelligent surfaces (RISs) are two dimensional (2D) metasurfaces which can intelligently manipulate electromagnetic waves by low-cost near passive reflecting elements. RIS is viewed as a potential key technology for the…

Signal Processing · Electrical Eng. & Systems 2022-06-07 Jie Huang , Cheng-Xiang Wang , Yingzhuo Sun , Rui Feng , Jialing Huang , Bolun Guo , Zhimeng Zhong , Tie Jun Cui

Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments. In a smart radio environment, surfaces are capable of manipulating the propagation…

Signal Processing · Electrical Eng. & Systems 2020-05-05 Mohamed A. ElMossallamy , Hongliang Zhang , Lingyang Song , Karim G. Seddik , Zhu Han , Geoffrey Ye Li

Reconfigurable Intelligent Surfaces (RISs) are promising and relatively low-cost tools for improving signal propagation in wireless communications. An RIS assists a base station in optimizing the channel and maximizing its capacity by…

Signal Processing · Electrical Eng. & Systems 2023-02-01 Andrey Sayanskiy , Andrey Belov , Ruslan Yafasov , Andrey Lyulyakin , Alexander Sherstobitov , Stanislav Glybovski , Vladimir Lyashev

Reconfigurable intelligent surface has attracted the attention of academia and industry as soon as it appears because it can flexibly manipulate the electromagnetic characteristics of wireless channel. Especially in the past one or two…

Networking and Internet Architecture · Computer Science 2022-01-19 Yajun Zhao , Mengnan Jian

The received signal strength (RSS) based technique is extensively utilized for localization in the indoor environments. Since the RSS values of neighboring locations may be similar, the localization accuracy of the RSS based technique is…

Signal Processing · Electrical Eng. & Systems 2023-03-27 Haobo Zhang , Hongliang Zhang , Boya Di , Kaigui Bian , Zhu Han , Lingyang Song

A Reconfigurable Intelligent Surface (RIS) can significantly enhance network positioning and mapping, acting as an additional anchor point in the reference system and improving signal strength and measurement diversity through the…

Information Theory · Computer Science 2024-11-15 Dimitris Kompostiotis , Dimitris Vordonis , Vassilis Paliouras , George C. Alexandropoulos , Florin Grec

Reconfigurable intelligent surfaces (RISs) or intelligent reflecting surfaces (IRSs), are regarded as one of the most promising and revolutionizing techniques for enhancing the spectrum and/or energy efficiency of wireless systems. These…

The demanding objectives for the future sixth generation (6G) of wireless communication networks have spurred recent research efforts on novel materials and radio-frequency front-end architectures for wireless connectivity, as well as…

Information Theory · Computer Science 2022-03-08 Mengnan Jian , George C. Alexandropoulos , Ertugrul Basar , Chongwen Huang , Ruiqi Liu , Yuanwei Liu , Chau Yuen

Reconfigurable intelligent surfaces (RISs) have attracted great attention as a potential beyond 5G technology. These surfaces consist of many passive elements of metamaterials whose impedance can be controllable to change the phase,…

Information Theory · Computer Science 2021-09-09 Özlem Tuğfe Demir , Emil Björnson

Recently, reconfigurable intelligent surfaces (RIS) have attracted a lot of attention due to their capability of extending cell coverage by reflecting signals toward the receiver. In this letter, we analyze the coverage of a downlink…

Information Theory · Computer Science 2020-09-18 Shuhao Zeng , Hongliang Zhang , Boya Di , Zhu Han , Lingyang Song

Reconfigurable intelligent surfaces (RISs) are considered as potential technologies for the upcoming sixth-generation (6G) wireless communication system. Various benefits brought by deploying one or multiple RISs include increased spectrum…

Signal Processing · Electrical Eng. & Systems 2021-04-16 Jiguang He , Nhan Thanh Nguyen , Rafaela Schroeder , Visa Tapio , Joonas Kokkoniemi , Markku Juntti

Wireless communications aided by reconfigurable intelligent surfaces (RISs) is a promising way to improve the coverage for cellular users. The controlled reflection of signals from RISs is especially useful in mm-wave/THz networks when the…

Information Theory · Computer Science 2023-03-14 Vikrant Malik , Gourab Ghatak , Abhishek K. Gupta , Sanket S. Kalamkar

Reconfigurable Intelligent Surface (RIS) has recently been regarded as a paradigm-shifting technology beyond 5G, for its flexibility on smartly adjusting the response to the impinging electromagnetic (EM) waves. Usually, RIS can be…

Signal Processing · Electrical Eng. & Systems 2023-03-07 Jiangfeng Hu , Haifan Yin , Li Tan , Lin Cao , Xilong Pei

Reconfigurable intelligent surfaces (RISs) have promising coverage and data rate gains for wireless communication systems in 5G and beyond. Prior work has mainly focused on analyzing the performance of these surfaces using computer…

The search for physical-layer technologies that can play a key role in beyond-5G systems has started. One option is reconfigurable intelligent surfaces (RIS), which can collect wireless signals from a transmitter and passively beamform them…

Information Theory · Computer Science 2021-01-05 Emil Björnson , Özgecan Özdogan , Erik G. Larsson

Although the fifth-generation (5G) technologies will significantly improve the spectrum and energy efficiency of today's wireless communication networks, their high complexity and hardware cost as well as increasingly more energy…

Information Theory · Computer Science 2019-09-02 Qingqing Wu , Rui Zhang

The integration of reconfigurable intelligent surfaces (RIS) in wireless environments offers channel programmability and dynamic control over propagation channels, which is expected to play a crucial role in sixth generation (6G) networks.…

Signal Processing · Electrical Eng. & Systems 2025-01-22 Anum Umer , Ivo Müürsepp , Muhammad Mahtab Alam