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This paper presents a deep learning-based framework for enhancing radar systems in the presence of interference, leveraging Reconfigurable Intelligent Surfaces (RIS). The proposed technique uses a modified MUSIC algorithm to estimate the…

信号处理 · 电气工程与系统科学 2025-04-08 Ali Parchekani , Milad Johnny , Shahrokh Valaee

Integrating wireless sensing capabilities into base stations (BSs) has become a widespread trend in the future beyond fifth-generation (B5G)/sixth-generation (6G) wireless networks. In this paper, we investigate intelligent reflecting…

新兴技术 · 计算机科学 2024-04-09 Taotao Ji , Meng Hua , Xuanhong Yan , Chunguo Li , Yongming Huang , Luxi Yang

In this letter, the use of intelligent reflecting surface (IRS) to enhance the physical layer security of downlink wireless communication is investigated. Assuming a single-antenna legitimate user and a multi-antenna eavesdropper, we…

信号处理 · 电气工程与系统科学 2020-12-07 Keming Feng , Xiao Li , Yu Han , Shi Jin , Yijian Chen

This article aims to reduce huge pilot overhead when estimating the reconfigurable intelligent surface (RIS) relayed wireless channel. Motivated by the compelling grasp of deep learning in tackling nonlinear mapping problems, the proposed…

信号处理 · 电气工程与系统科学 2021-04-26 Shen Gao , Peihao Dong , Zhiwen Pan , Geoffrey Ye Li

Electromagnetic wave control using the concept of a reflecting surface is first studied as a near-field and a far-field problem. Using a secondary source present in a wireless communication environment, such as a backscatter tag, it is…

信号处理 · 电气工程与系统科学 2020-06-24 Okan Yurduseven , Stylianos D. Assimonis , Michail Matthaiou

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…

Reconfigurable intelligent surface (RIS) has recently emerged as a promising candidate to improve the energy and spectral efficiency of wireless communication systems. However, the unit modulus constraint on the phase shift of reflecting…

信息论 · 计算机科学 2020-01-22 Jiabao Gao , Caijun Zhong , Xiaoming Chen , Hai Lin , Zhaoyang Zhang

Intelligent reflecting surfaces (IRSs) tune wireless environments to increase spectrum and energy efficiencies. In view of much recent attention to the IRS concept as a promising technology for 6G wireless communications, we present a…

信号处理 · 电气工程与系统科学 2019-11-05 Jun Zhao

This paper investigates the model aggregation process in an over-the-air federated learning (AirFL) system, where an intelligent reflecting surface (IRS) is deployed to assist the transmission from users to the base station (BS). With the…

信息论 · 计算机科学 2021-03-23 Jingheng Zheng , Wanli Ni , Hui Tian

Intelligent reflecting surfaces (IRSs) have become a vital technology for improving the spectrum and energy efficiency of forthcoming wireless networks. Nevertheless, practical implementation is obstructed by the excessive overhead…

信号处理 · 电气工程与系统科学 2025-11-07 Xianhua Yu , Dong Li , Bowen Gu , Liuqing Yang , Sumei Sun , George K. Karagiannidis

This paper presents a literature review on recent applications and design aspects of the intelligent reflecting surface (IRS) in the future wireless networks. Conventionally, the network optimization has been limited to transmission control…

信息论 · 计算机科学 2020-07-28 Shimin Gong , Xiao Lu , Dinh Thai Hoang , Dusit Niyato , Lei Shu , Dong In Kim , Ying-Chang Liang

Intelligent reflecting surfaces (IRSs) have the potential to transform wireless communication channels into smart reconfigurable propagation environments. To realize this new paradigm, the passive IRSs have to be large, especially for…

信息论 · 计算机科学 2020-12-10 Marzieh Najafi , Vahid Jamali , Robert Schober , Vincent H. Poor

Increasing concerns on intelligent spectrum sensing call for efficient training and inference technologies. In this paper, we propose a novel federated learning (FL) framework, dubbed federated spectrum learning (FSL), which exploits the…

网络与互联网体系结构 · 计算机科学 2022-05-24 Bo Yang , Xuelin Cao , Chongwen Huang , Chau Yuen , Marco Di Renzo , Yong Liang Guan , Dusit Niyato , Lijun Qian , Merouane Debbah

Intelligent reflecting/refracting surface (IRS) has recently emerged as a promising solution to reconfigure wireless propagation environment for enhancing the communication performance. In this paper, we study a new IRS-aided high-mobility…

信息论 · 计算机科学 2021-12-14 Zixuan Huang , Beixiong Zheng , Rui Zhang

Intelligent reflecting surfaces (IRSs) are considered a promising technology that can smartly reconfigure the wireless environment to enhance the performance of future wireless networks. However, the deployment of IRSs still faces…

网络与互联网体系结构 · 计算机科学 2022-11-08 Faisal Naeem , Georges Kaddoum , Saud Khan , Komal S. Khan

This study considers multiple reconfigurable intelligent surfaces (RISs)-aided multiuser downlink systems with the goal of jointly optimizing the transmitter precoding and RIS phase shift matrix to maximize spectrum efficiency. Unlike prior…

信息论 · 计算机科学 2025-10-01 Po-Heng Chou , Bo-Ren Zheng , Wan-Jen Huang , Walid Saad , Yu Tsao , Ronald Y. Chang

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

Reconfigurable Intelligent Surfaces (RISs) comprised of tunable unit elements have been recently considered in indoor communication environments for focusing signal reflections to intended user locations. However, the current proofs of…

信息论 · 计算机科学 2019-05-21 Chongwen Huang , George C. Alexandropoulos , Chau Yuen , Mérouane Debbah

Intelligent reflecting surface (IRS) is deemed as a promising and revolutionizing technology for future wireless communication systems owing to its capability to intelligently change the propagation environment and introduce a new dimension…

信号处理 · 电气工程与系统科学 2021-01-06 Wenhao Cai , Rang Liu , Yang Liu , Ming Li , Qian Liu

A model-based deep learning (DL) architecture is proposed for reconfigurable intelligent surface (RIS)-assisted multi-user communications to reduce the number of bits required for transmitting phase shift information from the access point…

信号处理 · 电气工程与系统科学 2026-04-10 Alexander James Fernandes , Ioannis Psaromiligkos