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In recent years, reconfigurable intelligent surfaces (RIS) have garnered significant attention for their ability to control the phase shifts in reflected signals. By intelligently adjusting these phases, RIS can establish seamless direct…

网络与互联网体系结构 · 计算机科学 2024-12-17 Peini Yi , Wenchi Cheng , Jingqing Wang , Wei Zhang

A reconfigurable intelligent surface (RIS) is capable of manipulating electromagnetic waves with its flexibly configurable unit cells, thus is an appealing technology to resist fast fading caused by multi-path in wireless communications. In…

信息论 · 计算机科学 2022-08-29 Ruya Zhou , Xiangyu Chen , Wankai Tang , Xiao Li , Shi Jin , Ertugrul Basar , Qiang Cheng , Tie Jun Cui

A reconfigurable intelligent surface (RIS) is a planar surface that can enhance the quality of communication by providing control over the communication environment. Reflection optimization is one of the pivotal challenges in RIS setups.…

信息论 · 计算机科学 2024-11-26 Seyedkhashayar Hashemi , Masoud Ardakani , Hai Jiang

Reconfigurable intelligent surfaces (RISs) constitute a promising performance enhancement for next-generation (NG) wireless networks in terms of enhancing both their spectrum efficiency (SE) and energy efficiency (EE). We conceive a system…

信号处理 · 电气工程与系统科学 2023-04-06 Tianwei Hou , Yuanwei Liu , Zhengyu Song , Xin Sun , Yue Chen , Lajos HanzoE

Reconfigurable intelligent surfaces (RIS) have been actively researched as a potential technique for future wireless communications, which intelligently ameliorate the signal propagation environment. In the conventional design, each RIS…

Localization using multiple base stations (BSs) has gained much attention for its advantage in localization accuracy. However, the performance of the multi-BS system suffers from its limited number of antennas. To solve the above issue, we…

信号处理 · 电气工程与系统科学 2025-07-23 Weiqiao Zhu , Mengyuan Cao , Yang Yang , Haobo Zhang , Weijun Hao , Xiaofei Jia , Hongliang Zhang

We consider the extra degree of freedom offered by the rotation of the reconfigurable intelligent surface (RIS) plane and investigate its potential in improving the performance of RIS-assisted wireless communication systems. By considering…

信息论 · 计算机科学 2022-02-14 Yajun Cheng , Wei Peng , Chongwen Huang , George C. Alexandropoulos , Chau Yuen , Mérouane Debbah

Reconfigurable intelligent surface (RIS) is one of the most promising technologies for 5G-Adv and 6G. It has the characteristics of low cost, low complexity, and easy deployment, which provides a new opportunity to develop intelligent…

信号处理 · 电气工程与系统科学 2022-12-20 Yajun Zhao , Jiayi Zhang , Bo Ai

Reconfigurable intelligent surfaces (RISs) are a promising technology for enhancing cellular network performance and yielding additional value to network operators. This paper proposes a techno-economic analysis of RIS-assisted cellular…

性能 · 计算机科学 2025-01-22 Guodong Sun , Francois Baccelli , Luis Uzeda Garcia , Stefano Paris

In the future, urban regions will encounter a massive number of capacity-hungry devices. Relying solely on terrestrial networks for serving all UEs will be a cost-ineffective approach. Consequently, with the anticipated supply and demand…

系统与控制 · 电气工程与系统科学 2023-01-20 Safwan Alfattani , Animesh Yadav , Halim Yanikomeroglu , Abbas Yongacoglu

Reconfigurable intelligent surface (RIS)-aided networks have been investigated for the purpose of improving the system performance. However, the introduced unit modulus phase shifts and coupling characteristic bring enormous challenges to…

信息论 · 计算机科学 2021-08-19 Biqian Feng , Junyuan Gao , Yongpeng Wu , Wenjun Zhang , Xiang-Gen Xia , Chengshan Xiao

Reconfigurable intelligent surfaces (RISs), with the potential to realize a smart radio environment, have emerged as an energy-efficient and a cost-effective technology to support the services and demands foreseen for coming decades. By…

信息论 · 计算机科学 2021-07-13 Sarah Basharat , Syed Ali Hassan , Haris Pervaiz , Aamir Mahmood , Zhiguo Ding , Mikael Gidlund

Reconfigurable intelligent surfaces (RISs) have received considerable attention as a key enabler for envisioned 6G networks, for the purpose of improving the network capacity, coverage, efficiency, and security with low energy consumption…

信号处理 · 电气工程与系统科学 2023-11-30 Hao Zhou , Melike Erol-Kantarci , Yuanwei Liu , H. Vincent Poor

Innovative reconfigurable intelligent surface (RIS) technologies are rising and recognized as promising candidates to enhance 6G and beyond wireless communication systems. RISs acquire the ability to manipulate electromagnetic signals,…

Reconfigurable Intelligent Surfaces (RIS) is becoming a transformative technology for the upcoming 6G communication networks, providing a way for smartly maneuvering the electromagnetic waves to enhance coverage and connectivity. This paper…

信号处理 · 电气工程与系统科学 2025-07-31 Atiquzzaman Mondal , Waheeb Tashan , Ayat Al-Olaimat , Hüseyin Arslan

This paper introduces double cascaded reconfigurable intelligent surfaces (RISs) to non-orthogonal multiple access (NOMA) networks over cascaded Rician fading and Nakagami-$m$ fading channels, where two kinds of passive RIS (PRIS) and…

数值分析 · 数学 2024-08-15 Xuehua Li , Xuanhao Lian , Xinwei Yue , Zhiping Lu , Chongwen Huang , Tianwei Hou

Reconfigurable intelligent surfaces (RISs) are widely considered to become an integral part of future wireless communication systems. Various methodologies exist to design such surfaces; however, most consider or require a very large number…

最优化与控制 · 数学 2023-09-01 Hans-Dieter Lang , Michel A. Nyffenegger , Heinz Mathis , Xingqi Zhang

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…

信息论 · 计算机科学 2020-12-01 Xuewen Qian , Marco Di Renzo

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…

信息论 · 计算机科学 2020-09-18 Shuhao Zeng , Hongliang Zhang , Boya Di , Zhu Han , Lingyang Song

The use of real-time software-controlled reconfigurable intelligent surface (RIS) units is proposed to increase the reliability of vehicle-to-everything (V2X) communications. The optimum placement problem of the RIS units is formulated by…

网络与互联网体系结构 · 计算机科学 2020-07-21 Y. Ugur Ozcan , Ozgur Ozdemir , Gunes Karabulut Kurt