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In recent years, the fifth-generation (5G) mobile network has been developed worldwide to remarkably improve network performance and spectral efficiency. Very recently, reconfigurable intelligent surfaces (RISs) technology has emerged as an…

Networking and Internet Architecture · Computer Science 2024-12-10 Valdemar Farré , Juan C. Estrada-Jiménez , José D. Vega Sánchez , Juan A. Vasquez-Peralvo , Symeon Chatzinotas

Existing works mainly rely on the far-field planar-wave-based channel model to assess the performance of reconfigurable intelligent surface (RIS)-enabled wireless communication systems. However, when the transmitter and receiver are in…

Signal Processing · Electrical Eng. & Systems 2024-03-20 Hao Jiang , Wangqi Shi , Zaichen Zhang , Cunhua Pan , Qingqing Wu , Feng Shu , Ruiqi Liu , Jiangzhou Wang

Reconfigurable intelligent surfaces (RISs) are envisioned to be a disruptive wireless communication technique that is capable of reconfiguring the wireless propagation environment. In this paper, we study a free-space RIS-assisted…

Information Theory · Computer Science 2022-09-19 Xin Cheng , Yan Lin , Weiping Shi , Jiayu Li , Cunhua Pan , Feng Shu , Yongpeng Wu , Jiangzhou Wang

Terahertz (THz) band communications and integrated sensing and communications (ISAC) are two main facets of the sixth generation wireless networks. In order to compensate the severe attenuation, the THz wireless systems employ large arrays,…

Signal Processing · Electrical Eng. & Systems 2024-08-20 Ahmet M. Elbir , Abdulkadir Celik , Ahmed M. Eltawil

In this paper, we propose a novel wireless architecture, mounted on a high-altitude aerial platform, which is enabled by reconfigurable intelligent surface (RIS). By installing RIS on the aerial platform, rich line-of-sight and full-area…

Signal Processing · Electrical Eng. & Systems 2022-02-03 Hong-Bae Jeon , Sung-Ho Park , Jaedon Park , Kaibin Huang , Chan-Byoung Chae

Reconfigurable Intelligent Surface (RIS) has becoming a useful tool in future wireless communication systems for close-distance communication network. This paper we use Reconfigurable Intelligent Surface (RIS) for downlink multi-user…

Information Theory · Computer Science 2021-02-02 RuiTianYi Lu

Reconfigurable Intelligent Surfaces (RIS) or Intelligent Reflecting Surfaces (IRS) are metasurfaces that can be deployed in various places in wireless environments to make these environments controllable and reconfigurable. In this paper,…

Information Theory · Computer Science 2020-01-22 S. Mohammad Razavizadeh , Tommy Svensson

Wireless powered and backscattering mobile edge computing (WPB-MEC) network is a novel network paradigm to supply energy supplies and computing resource to wireless sensors (WSs). However, its performance is seriously affected by severe…

Signal Processing · Electrical Eng. & Systems 2024-03-06 Bin Lyu , Yining Zhang , Pengcheng Chen , Ziwei Liu , Feng Tian

This paper investigates the problem of resource efficiency maximization in an active simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted communication system under practical transceiver hardware…

Signal Processing · Electrical Eng. & Systems 2025-09-09 Ao Huang , Xidong Mu , Li Guo , Guangyu Zhu

A novel movable-element simultaneously transmitting and reflecting surface (ME-STARS)-assisted near-field wideband communication framework is proposed. In particular, the position of each STARS element can be adjusted to combat the…

Signal Processing · Electrical Eng. & Systems 2025-05-27 Guangyu Zhu , Xidong Mu , Li Guo , Ao Huang , Shibiao Xu

This paper investigates the multi-antenna covert communications assisted by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). In particular, to shelter the existence of communications between…

Information Theory · Computer Science 2023-08-31 Han Xiao , Xiaoyan Hu , Pengcheng Mu , Wenjie Wang , Tong-Xing Zheng , Kai-Kit Wong , Kun Yang

This paper investigates an integrated sensing and communication (ISAC) system with reconfigurable intelligent surface (RIS). Our simultaneous beam training and target sensing (SBTTS) scheme enables the base station to perform beam training…

Signal Processing · Electrical Eng. & Systems 2023-11-28 Kangjian Chen , Chenhao Qi , Octavia A. Dobre , Geoffrey Ye Li

This paper tackles the deployment challenges of Simultaneous Transmitting and Reflecting Reconfigurable Intelligent Surface (STAR-RIS) in communication systems. Unlike existing works that use fixed deployment setups or solely optimize the…

Systems and Control · Electrical Eng. & Systems 2024-04-16 Bai Yan , Qi Zhao , Jin Zhang , J. Andrew Zhang

In this paper, we investigate real-time interference mitigation in multiuser wireless networks assisted by simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs). Unlike conventional methods that rely on…

Signal Processing · Electrical Eng. & Systems 2025-06-17 Abuzar B. M. Adam , Mohammed A. M. Elhassan , Elhadj Moustapha Diallo , Mohamed Amine Ouamri

Terahertz (THz) communications have emerged as a key technology for escalating data rates in future generation wireless networks. However, severe propagation losses at THz frequencies pose significant challenges, which can be mitigated via…

This paper investigates the multi-antenna covert communications assisted by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). In particular, to shelter the existence of covert communications between…

Information Theory · Computer Science 2023-05-10 Han Xiao , Xiaoyan Hu , Pengcheng Mu , Wenjie Wang , Tong-Xing Zheng , Kai-Kit Wong , Kun Yang

The combination of Terahertz (THz) and massive multiple-input multiple-output (MIMO) is promising to meet the increasing data rate demand of future wireless communication systems thanks to the huge bandwidth and spatial degrees of freedom.…

Information Theory · Computer Science 2024-08-14 Jiabao Gao , Xiaoming Cheng , Geoffrey Ye Li

In this paper, we propose a novel aerial backhaul architecture that employs an aerial active reconfigurable intelligent surface (RIS) to achieve energy-efficient, {full 3D coverage including UAV-BSs and ground users in 6G wireless…

Signal Processing · Electrical Eng. & Systems 2026-01-27 Hong-Bae Jeon , Chan-Byoung Chae

Reconfigurable intelligent surface (RIS) has emerged as a cost-effective and promising solution to extend the wireless signal coverage and improve the performance via passive signal reflection. Different from existing works which do not…

Information Theory · Computer Science 2023-11-22 Anastasios Papazafeiropoulos , Ahmet M. Elbir , Pandelis Kourtessis , Ioannis Krikidis , Symeon Chatzinotas

The terahertz (THz) frequency band has recently attracted considerable attention in wireless communications as potential candidate for providing the necessary high bandwidth for demanding applications. With increasing frequency, however,…

Signal Processing · Electrical Eng. & Systems 2022-12-13 Evangelos N. Papasotiriou , Sotiris Droulias , Angeliki Alexiou