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In this paper, we study an active IRS-aided simultaneous wireless information and power transfer (SWIPT) system. Specifically, an active IRS is deployed to assist a multi-antenna access point (AP) to convey information and energy…

Information Theory · Computer Science 2022-08-05 Ying Gao , Qingqing Wu , Guangchi Zhang , Wen Chen , Derrick Wing Kwan Ng , Marco Di Renzo

Intelligent reflecting surfaces (IRSs), active and/or passive, can be densely deployed in complex environments to significantly enhance wireless network coverage for both wireless information transfer (WIT) and wireless power transfer…

Information Theory · Computer Science 2023-07-06 Min Fu , Weidong Mei , Rui Zhang

Reconfigurable intelligent surfaces (RISs) are planar structures with attached electronic circuitry that enable a partially programmable communication environment. RIS operation can be regarded as nearly passive since it acts by simply…

Information Theory · Computer Science 2021-08-31 Steven Kisseleff , Konstantinos Ntontin , Wallace A. Martins , Symeon Chatzinotas , Björn Ottersten

Intelligent reflecting surface (IRS) is a promising technology for achieving high spectrum efficiency in future wireless networks by leveraging massive low-cost reflecting elements with each reflecting the incident signal with a proper…

Information Theory · Computer Science 2018-10-29 Qingqing Wu , Rui Zhang

Intelligent reflecting/refracting surface (IRS) is envisioned as a promising technology to reconfigure wireless propagation environment for enhancing the communication performance, by smartly controlling the signal reflection/refraction…

Information Theory · Computer Science 2023-10-18 Zixuan Huang , Lipeng Zhu , Rui Zhang

Intelligent reflecting surfaces (IRSs) can be beneficial to both information and energy transfer, due to the gains achieved by their multiple elements. In this work, we deal with the impact of spatial correlation between the IRS elements,…

Information Theory · Computer Science 2021-06-10 Constantinos Psomas , Ioannis Krikidis

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…

Information Theory · Computer Science 2019-04-30 Xianghao Yu , Dongfang Xu , Robert Schober

To support the development of internet-of-things applications, an enormous population of low-power devices are expected to be incorporated in wireless networks performing sensing and communication tasks. As a key technology for improving…

Information Theory · Computer Science 2024-02-20 Xiaoyang Li , Zidong Han , Guangxu Zhu , Yuanming Shi , Jie Xu , Yi Gong , Qinyu Zhang , Kaibin Huang , Khaled B. Letaief

The intelligent reflecting surface (IRS) alters the behavior of wireless media and, consequently, has potential to improve the performance and reliability of wireless systems such as communications and radar remote sensing. Recently,…

Signal Processing · Electrical Eng. & Systems 2023-04-13 Ahmet M. Elbir , Kumar Vijay Mishra , M. R. Bhavani Shankar , Symeon Chatzinotas

Intelligent reflecting surface (IRS) is a new and revolutionary technology capable of reconfiguring the wireless propagation environment by controlling its massive low-cost passive reflecting elements. Different from prior works that focus…

Information Theory · Computer Science 2021-11-05 Bifeng Ling , Jiangbin Lyu , Liqun Fu

Emerged as a promising solution for future wireless communication systems, intelligent reflecting surface (IRS) is capable of reconfiguring the wireless propagation environment by adjusting the phase-shift of a large number of reflecting…

Networking and Internet Architecture · Computer Science 2023-02-06 Hongguang Sun , Zelun Zhao , Hu Cheng , Jiangbin Lyu , Xijun Wang , Yan Zhang , Tony Q. S. Quek

The problem of simultaneously optimizing the information rate and the harvested power in a reconfigurable intelligent surface (RIS)-aided multiple-input single-output downlink wireless network with simultaneous wireless information and…

Information Theory · Computer Science 2022-04-26 Abdelhamed Mohamed , A. Zappone , Marco Di Renzo

Intelligent reflecting surface (IRS) can be densely deployed in complex environments to create cascaded line-of-sight (LoS) links between base stations (BSs) and users, which significantly enhance the signal coverage. In this paper, we…

Information Theory · Computer Science 2023-07-18 Weidong Mei , Zhi Chen , Rui Zhang

This paper considers an active intelligent reflecting surface (IRS)-aided wireless powered communication network (WPCN), where devices first harvest energy and then transmit information to a hybrid access point (HAP). Different from the…

Information Theory · Computer Science 2022-01-12 Piao Zeng , Deli Qiao , Qingqing Wu , Yuan Wu

Besides improving communication performance, intelligent reflecting surfaces (IRSs) are also promising enablers for achieving larger sensing coverage and enhanced sensing quality. Nevertheless, in the absence of a direct path between the…

Information Theory · Computer Science 2022-11-08 Kaitao Meng , Qingqing Wu , Robert Schober , Wen Chen

The concept of intelligent reflecting surfaces (IRSs) is considered as a promising technology for increasing the efficiency of mobile wireless networks. This is achieved by employing a vast amount of low-cost individually adjustable passive…

Networking and Internet Architecture · Computer Science 2020-12-01 Kevin Weinberger , Alaa Alameer Ahmad , Aydin Sezgin

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…

Networking and Internet Architecture · Computer Science 2022-11-08 Faisal Naeem , Georges Kaddoum , Saud Khan , Komal S. Khan

The rapid development of sixth-generation (6G) wireless networks requires seamless integration of communication and sensing to support ubiquitous intelligence and real-time, high-reliability applications. Integrated sensing and…

Signal Processing · Electrical Eng. & Systems 2025-11-17 Qingqing Wu , Qiaoyan Peng , Ziheng Zhang , Xiaodan Shao , Yang Liu , Yifan Jiang , Yapeng Zhao , Yanze Zhu , Yilong Chen , Zixiang Ren , Jie Xu , Wen Chen , Rui Zhang

Intelligent reflecting surfaces (IRSs) are regarded as key enablers of next-generation wireless communications, due to their capability of customizing the wireless propagation environment. In this paper, we investigate power-efficient…

Information Theory · Computer Science 2020-05-15 Xianghao Yu , Dongfang Xu , Derrick Wing Kwan Ng , Robert Schober

Intelligent Reflecting Surface (IRS) utilizes low-cost, passive reflecting elements to enhance the passive beam gain, improve Wireless Energy Transfer (WET) efficiency, and enable its deployment for numerous Internet of Things (IoT)…

Signal Processing · Electrical Eng. & Systems 2023-11-16 Cheng Luo , Jie Hu , Luping Xiang , Kun Yang , Kai-Kit Wong