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Reconfigurable Intelligent Surfaces (RIS) are passive or semi-passive heterogeneous metasurfaces and consist of many tunable elements. RIS is gaining momentum as a promising new technology to enable transforming the propagation environment…

信号处理 · 电气工程与系统科学 2022-01-06 Pooja Nuti , Elyes Balti , Brian L. Evans

Reconfigurable intelligent surface (RIS) is a type of wireless communication technology that uses a reconfigurable surface, such as a wall or building that is able to adjust its properties by an integrated optimization algorithm in order to…

应用物理 · 物理学 2023-09-25 Emanuel Colella , Luca Bastianelli , Franco Moglie , Valter Mariani Primiani

A reconfigurable intelligent surface (RIS) is a metamaterial that can be integrated into walls and influence the propagation of electromagnetic waves. This, typically passive radio frequency (RF) technology is emerging for indoor and…

信号处理 · 电气工程与系统科学 2020-12-10 Aly Sabri Abdalla , Talha Faizur Rahman , Vuk Marojevic

Reconfigurable Intelligent Surface (RIS) panels are envisioned as a key technology for sixth-generation (6G) wireless networks, providing a cost-effective means to enhance coverage and spectral efficiency. A critical challenge is the…

Future wireless networks are expected to support diverse mobile services, including artificial intelligence (AI) services and ubiquitous data transmissions. Federated learning (FL), as a revolutionary learning approach, enables…

信息论 · 计算机科学 2023-04-06 Zehong Lin , Hang Liu , Ying-Jun Angela Zhang

Reconfigurable intelligent surface (RIS) is considered to be an energy-efficient approach to reshape the wireless environment for improved throughput. Its passive feature greatly reduces the energy consumption, which makes RIS a promising…

信息论 · 计算机科学 2020-01-20 Keke Ying , Zhen Gao , Shanxiang Lyu , Yongpeng Wu , Hua Wang , Mohamed-Slim Alouini

This paper addresses the crucial need for reliable wireless communication in vehicular networks, particularly vital for the safety and efficacy of (semi-)autonomous driving amid increasing traffic. We explore the use of Reconfigurable…

网络与互联网体系结构 · 计算机科学 2025-03-26 Salim Janji , Paweł Sroka , Adrian Kliks

Reconfigurable Intelligent Surfaces (RISs) are recently gaining remarkable attention as a low-cost, hardware-efficient, and highly scalable technology capable of offering dynamic control of electro-magnetic wave propagation. Their…

信息论 · 计算机科学 2020-10-12 George C. Alexandropoulos , Sumudu Samarakoon , Mehdi Bennis , Merouane Debbah

To enable communication-efficient federated learning (FL), this paper studies an unmanned aerial vehicle (UAV)-enabled FL system, where the UAV coordinates distributed ground devices for a shared model training. Specifically, by exploiting…

信号处理 · 电气工程与系统科学 2022-10-21 Min Fu , Yuanming Shi , Yong Zhou

In the beyond 5G era, AI/ML empowered realworld digital twins (DTs) will enable diverse network operators to collaboratively optimize their networks, ultimately improving end-user experience. Although centralized AI-based learning…

网络与互联网体系结构 · 计算机科学 2025-11-05 Saroj Kumar Panda , Tania Panayiotou , Georgios Ellinas , Sadananda Behera

This paper integrates non-orthogonal multiple access (NOMA) and over-the-air federated learning (AirFL) into a unified framework using one simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). The STAR-RIS…

信息论 · 计算机科学 2022-07-08 Wanli Ni , Yuanwei Liu , Yonina C. Eldar , Zhaohui Yang , Hui Tian

Integrating artificial intelligence (AI) and federated learning (FL) in smart transportation has raised critical issues regarding their responsible use. Ensuring responsible AI is paramount for the stability and sustainability of…

网络与互联网体系结构 · 计算机科学 2024-04-11 Xiaowen Huang , Tao Huang , Shushi Gu , Shuguang Zhao , Guanglin Zhang

Unmanned Aerial Vehicles (UAVs) play a pivotal role in the emerging low-altitude economy. However, they face significant challenges in achieving reliable network coverage during transit operations. This paper provides an in-depth…

信息论 · 计算机科学 2026-01-26 Yajun Zhao , Mengnan Jian , Yifei Yuan

Wireless traffic is exploding, due to the myriad of new connections and the exchange of capillary data at the edge of the networks to operate real-time processing and decision making. The latter especially affects the uplink traffic, which…

信号处理 · 电气工程与系统科学 2022-11-24 Fatima Ezzahra Airod , Mattia Merluzzi , Antonio Clemente , Emilio Calvanese Strinati

Reconfigurable intelligent surfaces (RIS) have drawn considerable attention recently due to their controllable scattering elements that are able to direct electromagnetic waves into desirable directions. Although RISs share some…

信息论 · 计算机科学 2021-05-03 Mohanad Obeed , Anas Chaaban

Devices located in remote regions often lack coverage from well-developed terrestrial communication infrastructure. This not only prevents them from experiencing high quality communication services but also hinders the delivery of machine…

分布式、并行与集群计算 · 计算机科学 2024-08-20 Dong-Jun Han , Wenzhi Fang , Seyyedali Hosseinalipour , Mung Chiang , Christopher G. Brinton

This paper investigates reconfigurable intelligent surface (RIS)-assisted unmanned aerial vehicle (UAV) downlink networks with fluid antennas (FA), where RIS enables non-line-of-sight (NLoS) transmissions. Moreover, the FA is equipped on…

信息论 · 计算机科学 2025-01-17 Li-Hsiang Shen , Yi-Hsuan Chiu

A reconfigurable intelligent surface (RIS) is a nearly-passive flat layer made of inexpensive elements that can add a tunable phase shift to the impinging electromagnetic wave and are controlled by a low-power electronic circuit. This paper…

信号处理 · 电气工程与系统科学 2022-05-04 Stefano Buzzi , Emanuele Grossi , Marco Lops , Luca Venturino

The reconfigurable intelligent surface (RIS) technology for metasurfaces is ushering in a new paradigm for wireless communication systems. It provides an accessible way for controlling the interaction between electromagnetic waves with the…

信号处理 · 电气工程与系统科学 2026-01-21 P. H. C. de Souza , M. Khazaee , L. L. Mendes

In this paper, we investigate a reconfigurable intelligent surface (RIS)-aided multiuser full-duplex secure communication system with hardware impairments at transceivers and RIS, where multiple eavesdroppers overhear the two-way…

信息论 · 计算机科学 2022-08-17 Zhangjie Peng , Zhibo Zhang , Lei Kong , Cunhua Pan , Li Li , Jiangzhou Wang