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The integration of Reconfigurable Intelligent Surfaces (RISs) into wireless environments endows channels with programmability, and is expected to play a key role in future communication standards. To date, most RIS-related efforts focus on…

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…

信息论 · 计算机科学 2021-03-05 E. Basar , I. Yildirim

Stacked intelligent metasurfaces (SIM) provide a cost-effective and scalable solution for large-scale antenna communications.However, efficient channel state information acquisition and phase shift optimization remain critical challenges.…

信息论 · 计算机科学 2026-05-26 Qian Zhang , Ju Liu , Yao Ge , Yufei Zhao , Wali Ullah Khan , Zheng Dong , Yong Liang Guan , Chau Yuen

The reconfigurable intelligent surface (RIS) is a promising technology that enables wireless communication systems to achieve improved performance by intelligently manipulating wireless channels. In this paper, we consider the sum-rate…

信号处理 · 电气工程与系统科学 2023-08-21 Bile Peng , Karl-Ludwig Besser , Ramprasad Raghunath , Vahid Jamali , Eduard A. Jorswieck

Reconfigurable intelligent surfaces (RISs) are arrays of passive elements that can control the reflection of the incident electromagnetic waves. While RIS are particularly useful to avoid blockages, the protocol aspects for their…

Reconfigurable Intelligent Surfaces (RIS) hold the promise of improving significantly coverage, as well as spectral and energy efficiency in wireless communication systems. Techniques based on RIS form a key technology for 6G systems. An…

信息论 · 计算机科学 2025-08-15 Jiawei Qiu , Harry Leib

Can reconfigurable intelligent surfaces (RISs) operate in a standalone mode that is completely transparent to the 3GPP 5G initial access process? Realizing that may greatly simplify the deployment and operation of these surfaces and reduce…

信号处理 · 电气工程与系统科学 2022-11-28 Shuaifeng Jiang , Ahmed Hindy , Ahmed Alkhateeb

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…

网络与互联网体系结构 · 计算机科学 2022-01-19 Yajun Zhao , Mengnan Jian

Reconfigurable intelligent surface (RIS) is envisioned to be a promising green technology to reduce the energy consumption and improve the coverage and spectral efficiency of massive multiple-input multiple-output (MIMO) wireless networks.…

信息论 · 计算机科学 2021-02-12 Zhen-Qing He , Hang Liu , Xiaojun Yuan , Ying-Jun Angela Zhang , Ying-Chang Liang

Reconfigurable Intelligent Surfaces (RISs) have emerged as a promising technology to enhance wireless communication systems by enabling dynamic control over the propagation environment. However, practical experiments are crucial towards the…

As an emerging wireless communication technology, reconfigurable intelligent surface (RIS) has become a basic choice for providing signal coverage services in scenarios with dense obstacles or long tunnels through multi-hop configurations.…

信息论 · 计算机科学 2024-07-16 Rujing Xiong , Jialong Lu , Jianan Zhang , Minggang Liu , Xuehui Dong , Tiebin Mi , Robert Caiming Qiu

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…

信号处理 · 电气工程与系统科学 2023-04-25 Xing Jia , Jiancheng An , Hao Liu , Hongshu Liao , Lu Gan , Chau Yuen

Emerging as a cornerstone for next-generation wireless networks, integrated sensing and communication (ISAC) systems demand innovative solutions to balance spectral efficiency and sensing accuracy. In this paper, we propose a coordinated…

信号处理 · 电气工程与系统科学 2025-06-02 Chunjie Wang , Xuhui Zhang , Wenchao Liu , Jinke Ren , Huijun Xing , Shuqiang Wang , Yanyan Shen

Reconfigurable intelligent surface (RIS) can be employed in a cell-free system to create favorable propagation conditions from base stations (BSs) to users via configurable elements. However, prior works on RIS-aided cell-free system…

信息论 · 计算机科学 2022-08-15 Xu Gan , Caijun Zhong , Chongwen Huang , Zhaohui Yang , Zhaoyang Zhang

Reconfigurable intelligent surface (RIS) is a revolutionary technology for sixth-generation (6G) networks owing to its ability to manipulate wireless environments. As a frequency-selective device, RIS can only effectively shape the…

信息论 · 计算机科学 2022-11-01 Sifan Liu , Rang Liu , Ming Li , Yang Liu , Qian Liu

Millimeter wave (mmWave) communications are vulnerable to blockages and node mobility due to the highly directional signal beams. The emerging Reconfigurable Intelligent Surfaces (RISs) technique can effectively mitigate the blockage…

信号处理 · 电气工程与系统科学 2024-10-28 Xiaowen Tian , Zhi Sun

Reconfigurable intelligent surface (RIS)-assisted communications is one of the promising candidates for next generation wireless networks by controlling the propagation environment dynamically. In this study, a channel modeling strategy for…

信息论 · 计算机科学 2021-11-03 Fatih Kilinc , Ibrahim Yildirim , Ertugrul Basar

As an emerging communication auxiliary technology, reconfigurable intelligent surface (RIS) is expected to play a significant role in the upcoming 6G networks. Due to its total reflection characteristics, it is challenging to implement…

信号处理 · 电气工程与系统科学 2023-08-04 W. Li , Z. Lin , Q. Guo , B. Vucetic

Intelligent reflection surface (IRS) has recently been recognized as a promising technique to enhance the performance of wireless systems due to its ability of reconfiguring the signal propagation environment. However, the perfect channel…

信号处理 · 电气工程与系统科学 2021-08-10 Gui Zhou , Cunhua Pan , Hong Ren , Kezhi Wang , Arumugam Nallanathan

Future wireless communication networks are expected to be smarter and more aware of their surroundings, enabling a wide range of context-aware applications. Reconfigurable intelligent surfaces (RISs) are set to play a critical role in…

信息论 · 计算机科学 2025-03-13 Yixuan Huang , Jie Yang , Chao-Kai Wen , Shi Jin