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Malicious jamming launched by smart jammer, which attacks legitimate transmissions has been regarded as one of the critical security challenges in wireless communications. Thus, this paper exploits intelligent reflecting surface (IRS) to…

信号处理 · 电气工程与系统科学 2020-12-24 Helin Yang , Zehui Xiong , Jun Zhao , Dusit Niyato , Qingqing Wu , Massimo Tornatore , Stefano Secci

Intelligent reflecting surfaces (IRSs) have received considerable attention from the wireless communications research community recently. In particular, as low-cost passive devices, IRSs enable the control of the wireless propagation…

信息论 · 计算机科学 2019-04-30 Xianghao Yu , Dongfang Xu , Robert Schober

We investigate transmission optimization for intelligent reflecting surface (IRS) assisted multi-antenna systems from the physical-layer security perspective. The design goal is to maximize the system secrecy rate subject to the source…

信息论 · 计算机科学 2020-05-12 Hong Shen , Wei Xu , Shulei Gong , Zhenyao He , Chunming Zhao

Intelligent reflecting surface (IRS) has emerged as a promising technology to enhance the wireless communication network coverage and capacity by dynamically controlling the radio signal propagation environment. In contrast to the existing…

信息论 · 计算机科学 2022-07-06 Zhenyu Kang , Changsheng You , Rui Zhang

The integration of intelligent reflecting surface (IRS) into over-the-air computation (AirComp) is an effective solution for reducing the computational mean squared error (MSE) via its high passive beamforming gain. Prior works on IRS aided…

信息论 · 计算机科学 2024-05-10 Guangji Chen , Jun Li , Qingqing Wu , Meng Hua , Kaitao Meng , Zhonghao Lyu

This paper proposes a novel relay-aided intelligent reconfigurable surface (IRS) architecture for future wireless communication systems. The proposed architecture, which consists of two side-by-side intelligent surfaces connected via a…

信息论 · 计算机科学 2020-06-12 Xiaoyan Ying , Umut Demirhan , Ahmed Alkhateeb

This paper proposes to leverage intelligent reflecting surface (IRS) backscatter to realize radio-frequency-chain-free uplink-transmissions (RFCF-UT). In this communication paradigm, IRS works as an information carrier, whose elements are…

信号处理 · 电气工程与系统科学 2022-07-22 Sai Xu , Yanan Du , Jiliang Zhang , Jiangzhou Wang , Jie Zhang

Intelligent reflecting surfaces (IRS) consist of configurable meta-atoms, which can change the wireless propagation environment through design of their reflection coefficients. We consider a practical setting where (i) the IRS reflection…

信号处理 · 电气工程与系统科学 2021-12-06 Junghoon Kim , Seyyedali Hosseinalipour , Andrew C. Marcum , Taejoon Kim , David J. Love , Christopher G. Brinton

This paper studies intelligent reflecting surface (IRS) assisted active device detection. Since the locations of the devices are a priori unknown, optimal IRS beam alignment is not possible and a worst-case design for a given coverage area…

信号处理 · 电气工程与系统科学 2023-10-30 Friedemann Laue , Vahid Jamali , Robert Schober

Intelligent reflective surfaces (IRSs) capable of reconfiguring their electromagnetic absorption and reflection properties in real-time are offering unprecedented opportunities to enhance wireless communication experience in challenging…

网络与互联网体系结构 · 计算机科学 2020-02-03 Dong Ma , Ming Ding , Mahbub Hassan

Reconfigurable intelligent surfaces (RISs), also known as intelligent reflecting surfaces (IRSs), or large intelligent surfaces (LISs), have received significant attention for their potential to enhance the capacity and coverage of wireless…

信号处理 · 电气工程与系统科学 2021-05-05 Yuanwei Liu , Xiao Liu , Xidong Mu , Tianwei Hou , Jiaqi Xu , Marco Di Renzo , Naofal Al-Dhahir

Intelligent reflecting surfaces (IRSs) are envisioned as a transformative method for enhancing the physical layer security of future communication networks. However, current IRS-assisted secure wireless system designs incur high time cost…

信号处理 · 电气工程与系统科学 2025-01-23 Yifei Wu , Mehmet Emin Arslan , Niels Neumann , Wolfgang Gerstacker , Robert Schober

Reconfigurable Intelligent Surfaces (RISs) are promising and relatively low-cost tools for improving signal propagation in wireless communications. An RIS assists a base station in optimizing the channel and maximizing its capacity by…

Intelligent reflecting surface (IRS) is being considered as a prospective candidate for next-generation wireless communication due to its ability to significantly improve coverage and spectral efficiency by controlling the propagation…

信号处理 · 电气工程与系统科学 2021-04-29 Hasan Albinsaid , Keshav Singh , Ankur Bansal , Sudip Biswas , Chih-Peng Li , Zygmunt J. Haas

This paper studies the feasibility of deploying intelligent reflecting surfaces (IRSs) in massive MIMO (multiple-input multiple-output) systems to improve the performance of users in the service dead zone. To reduce the channel training…

信息论 · 计算机科学 2022-01-13 Zhaorui Wang , Liang Liu , Shuowen Zhang , Shuguang Cui

Electromagnetic wave absorbing material (EWAM) plays an essential role in manufacturing stealth aircraft, which can achieve the electromagnetic stealth (ES) by reducing the strength of the signal reflected back to the radar system. However,…

信号处理 · 电气工程与系统科学 2024-03-20 Xue Xiong , Beixiong Zheng , A. Lee Swindlehurst , Jie Tang , Wen Wu

This letter explores an implementation of a novel thin film 1-by-4 reconfigurable intelligent surface (RIS) designed for future communication and sensing scenarios. Utilizing cost-effective inkjet printing methods and additive…

信号处理 · 电气工程与系统科学 2024-08-05 Boxuan Xie , Aleksandr D. Kuznetsov , Lauri Mela , Jari Lietzén , Kalle Ruttik , Alp Karakoç , Riku Jäntti

This paper investigates intelligent reflecting surface (IRS) enabled non-line-of-sight (NLoS) wireless sensing, in which an IRS is dedicatedly deployed to assist an access point (AP) to sense a target at its NLoS region. It is assumed that…

信号处理 · 电气工程与系统科学 2023-07-05 Xianxin Song , Jie Xu , Fan Liu , Tony Xiao Han , Yonina C. Eldar

The work analyzed the positioning of IRS over the coverage region of micro cell to derive optimal placement location to support cell-edge Internet of Things (IoT) devices with a favorable signal-to-interference plus noise ratio (SINR).…

信号处理 · 电气工程与系统科学 2023-03-15 Mobasshir Mahbub , Raed M. Shubair

In this paper, we propose intelligent reflecting surfaces (IRS) assisted secure wireless communications with multi-input and multi-output antennas (IRS-MIMOME). The considered scenario is an access point (AP) equipped with multiple antennas…

信息论 · 计算机科学 2020-01-27 Weiheng Jiang , Yu Zhang , Jinsong Wu , Wenjiang Feng , Yi Jin