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Intelligent reflecting surface (IRS) is a cost-effective solution for achieving high spectrum and energy efficiency in future wireless networks by leveraging massive low-cost passive elements that are able to reflect the signals with…

信息论 · 计算机科学 2020-01-03 Qingqing Wu , Rui Zhang

This work studies the modelling and the optimization of intelligent reflecting surface (IRS) assisted multiple-input multiple-output (MIMO) systems through cascaded line-of-sight (LoS) links. In Part I of this work, we build up a new…

信息论 · 计算机科学 2022-07-12 Mingchen Zhang , Xiaojun Yuan

Intelligent reflecting surface (IRS) has emerged as a key enabling technology to realize smart and reconfigurable radio environment for wireless communications, by digitally controlling the signal reflection via a large number of passive…

信息论 · 计算机科学 2022-02-02 Beixiong Zheng , Changsheng You , Weidong Mei , Rui Zhang

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 surface (IRS) has become a promising technology to aid next generation wireless communication systems. In this paper, we develop an alternating beamforming technique with a novel concept of IRS element allocation for…

信息论 · 计算机科学 2022-06-28 Hyesang Cho , Junil Choi

Millimeter wave (MmWave) communications is capable of supporting multi-gigabit wireless access thanks to its abundant spectrum resource. However, the severe path loss and high directivity make it vulnerable to blockage events, which can be…

信号处理 · 电气工程与系统科学 2020-10-20 Peilan Wang , Jun Fang , Xiaojun Yuan , Zhi Chen , Huiping Duan , Hongbin Li

In this paper, an intelligent reflecting surface (IRS) is leveraged to enhance the physical layer security of an integrated sensing and communication (ISAC) system in which the IRS is deployed to not only assist the downlink communication…

信息论 · 计算机科学 2022-07-20 Meng Hua , Qingqing Wu , Wen Chen , Octavia A. Dobre , A. Lee Swindlehurst

Recently, intelligent reflecting surface (IRS) has emerged as an appealing technique that enables wireless communications with low hardware cost and low power consumption. In this letter, we consider an IRS-assisted point-to-point…

信息论 · 计算机科学 2020-04-17 Boyu Ning , Zhi Chen , Wenjie Chen , Jun Fang

Security and energy efficiency have become crucial features in the modern-era wireless communication. In this paper, we consider an energy-efficient design for intelligent reflecting surface (IRS)-assisted multiple-input multiple-output…

信号处理 · 电气工程与系统科学 2022-09-02 Anshu Mukherjee , Vaibhav Kumar , Derrick Wing Kwan Ng , Le-Nam Tran

Intelligent Reflecting Surface (IRS) has been recently proposed as a promising solution to enhance the spectral and energy efficiency of future wireless networks by tuning a massive number of low-cost passive reflecting elements and thereby…

信息论 · 计算机科学 2020-02-27 Jiangbin Lyu , Rui Zhang

Full-duplex (FD) transmission has already been regarded and developed as a promising method to improve the utilization efficiency of the limited spectrum resource, as transmitting and receiving are allowed to simultaneously occur on the…

信号处理 · 电气工程与系统科学 2020-05-27 Gaofeng Pan , Jia Ye , Jianping An , Mohamed-Slim Alouini

Intelligent reflecting surfaces (IRSs) are envisioned as a low-cost solution to achieve high spectral and energy efficiency in future communication systems due to their ability to customize wireless propagation environments. Although…

信息论 · 计算机科学 2023-02-27 Yifei Wu , Dongfang Xu , Derrick Wing Kwan Ng , Robert Schober , Wolfgang Gerstacker

In this paper, we propose a rate-splitting multiple access (RSMA) scheme for uplink wireless communication systems with intelligent reflecting surface (IRS) aided. In the considered model, IRS is adopted to overcome power attenuation caused…

信息论 · 计算机科学 2023-09-07 Shanshan Zhang , Wen Chen

Intelligent reflecting surface (IRS) offers a cost effective solution to link blockage problem in mmWave communications, and the prerequisite of which is the accurate estimation of (1) the optimal beams for base station/access point (BS/AP)…

信息论 · 计算机科学 2021-01-13 Wei Wang , Wei Zhang

Intelligent reflecting surface (IRS) is an emerging technology for wireless communication composed of a large number of low-cost passive devices with reconfigurable parameters, which can reflect signals with a certain phase shift and is…

信息论 · 计算机科学 2023-02-16 Feng Shu , Lili Yang , Yan Wang , Xuehui Wang , Weiping Shi , Chong Shen , Jiangzhou Wang

This paper considers a secure multigroup multicast multiple-input single-output (MISO) communication system aided by an intelligent reflecting surface (IRS). Specifically, we aim to minimize the transmit power at the Alice via jointly…

信号处理 · 电气工程与系统科学 2020-08-18 Weiping Shi , Jiayu Li , Guiyang Xia , Yuntian Wang , Xiaobo Zhou , Yonghui Zhang , Feng Shu

This letter presents a detailed performance analysis of the intelligent reflecting surface (IRS) aided single-input single-output communication systems, taking into account of the direct link between the transmitter and receiver. A…

信息论 · 计算机科学 2020-08-04 Qin Tao , Junwei Wang , Caijun Zhong

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

Intelligent reflecting surface (IRS)-assisted full-duplex (FD) terahertz (THz) communication systems have emerged as a promising paradigm to satisfy the escalating demand for ultra-high data rates and spectral efficiency in future wireless…

信息论 · 计算机科学 2025-10-30 Chi Qiu , Wen Chen , Qingqing Wu , Fen Hou , Wanming Hao , Ruiqi Liu , Derrick Wing Kwan Ng

In this paper, we investigate the design of secure transmission frameworks with an intelligent reflecting surface (IRS). Our design aims to minimize the system energy consumption in cases of rank-one and full-rank access point (AP)-IRS…

信息论 · 计算机科学 2019-09-04 Biqian Feng , Yongpeng Wu , Mengfan Zheng