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Wireless communications via intelligent reflecting surfaces (IRSs) has received considerable attention from both academia and industry. In particular, IRSs are able to create favorable wireless propagation environments with typically…

信息论 · 计算机科学 2020-01-31 Xianghao Yu , Dongfang Xu , Robert Schober

Reconfigurable intelligent surface (RIS) has been envisioned as a key technology in future wireless communication networks to enable smart radio environment. To further enhance the passive beamforming capability of RIS, beyond diagonal…

信号处理 · 电气工程与系统科学 2025-09-22 Ziang Liu , Hongyu Li , Bruno Clerckx

This work demonstrates the effectiveness of a novel simultaneous transmission and reflection reconfigurable intelligent surface (STAR-RIS) in Full-Duplex (FD) aided communication system. The objective is to minimize the total transmit power…

信号处理 · 电气工程与系统科学 2022-03-15 Yiru Wang , Pengxin Guan , Hongkang Yu , Yuping Zhao

In this paper, the problem of maximizing the sum of data rates of all users in an intelligent reflecting surface (IRS)-assisted millimeter wave multicast multiple-input multiple-output communication system is studied. In the considered…

信号处理 · 电气工程与系统科学 2022-08-16 Songling Zhang , Zhaohui Yang , Mingzhe Chen , Danpu Liu , Kai-Kit Wong , H. Vincent Poor

This letter investigates an intelligent reflecting surfaces (IRS)-enhanced network from spectral efficiency enhancement point of view for downlink multi-user (MU) multi-input-single-output systems (MISO). In contrast to previous works which…

信号处理 · 电气工程与系统科学 2023-03-01 Farimehr Zohari , S. M. Mahdi Shahabi , Mehrdad Ardebilipour

Wireless communication in the TeraHertz band (0.1--10 THz) is envisioned as one of the key enabling technologies for the future sixth generation (6G) wireless communication systems scaled up beyond massive multiple input multiple output…

信号处理 · 电气工程与系统科学 2022-06-23 Chongwen Huang , Zhaohui Yang , George C. Alexandropoulos , Kai Xiong , Li Wei , Chau Yuen , Zhaoyang Zhang , Merouane Debbah

To enable non-line-of-sight (NLoS) sensing and communications, dual-function radar-communications (DFRC) systems have recently proposed employing reconfigurable intelligent surface (RIS) as a reflector in wireless media. However, in the…

信号处理 · 电气工程与系统科学 2023-05-09 Tong Wei , Linlong Wu , Kumar Vijay Mishra , M. R. Bhavani Shankar

In this paper, we investigate an intelligent reflecting surface (IRS) assisted cell-free multiple input multiple output (MIMO) communication system, where distributed multiple IRSs are dedicated deployed to assist distributed multiple base…

信息论 · 计算机科学 2021-08-18 Xie Xie , Chen He , Xiaoya Li , Kun Yang , Z. Jane Wang

In this work, we investigate a novel simultaneous transmission and reflection reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output downlink system, where three practical transmission protocols, namely, energy…

信息论 · 计算机科学 2021-06-18 Hehao Niu , Zheng Chu , Fuhui Zhou , Pei Xiao , Naofal Al-Dhahir

We study the beamforming optimization for an intelligent reflecting surface (IRS)-aided full-duplex (FD) communication system in this letter. Specifically, we maximize the sum rate of bi-directional transmissions by jointly optimizing the…

信息论 · 计算机科学 2020-10-22 Hong Shen , Tian Ding , Wei Xu , Chunming Zhao

To make a good balance between performance, cost, and power consumption, a hybrid intelligent reflecting surface (IRS)-aided directional modulation (DM) network is investigated in this paper, where the hybrid IRS consists of passive and…

信息论 · 计算机科学 2023-02-15 Rongen Dong , Hangjia He , Feng Shu , Riqing Chen , Jiangzhou Wang

Intelligent reflecting surfaces (IRSs) enable multiple-input multiple-output (MIMO) transmitters to modify the communication channels between the transmitters and receivers. In the presence of eavesdropping terminals, this degree of freedom…

信息论 · 计算机科学 2022-02-03 Saba Asaad , Yifei Wu , Ali Bereyhi , Ralf R. Müller , Rafael F. Schaefer , H. Vincent Poor

Intelligent reflecting surface (IRS) is a promising technology to boost the efficiency of wireless energy transfer (WET) systems. However, for a multiuser WET system, simultaneous multi-beam energy transmission is generally required to…

信息论 · 计算机科学 2022-05-19 Chi Qiu , Qingqing Wu , Meng Hua , Xinrong guan , Yuan Wu

Unlike the conventional fully-passive and fully-active reconfigurable intelligent surfaces (RISs), a hybrid RIS consisting of active and passive reflection units has recently been concerned, which can exploit their integrated advantages to…

仪器与探测器 · 物理学 2025-05-27 Yu Yao , Junhao Zhang , Pu Miao , Long Zhang , Gaojie Chen , Feng Shu , Kai-Kit Wong

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 surface (IRS), which consists of a large number of tunable reflective elements, is capable of enhancing the wireless propagation environment in a cellular network by intelligently reflecting the electromagnetic waves…

信号处理 · 电气工程与系统科学 2021-06-10 Tao Jiang , Hei Victor Cheng , Wei Yu

Reconfigurable intelligent surface (RIS) has gained much traction due to its potential to manipulate the propagation environment via nearly-passive reconfigurable elements. In our previous work, we have analyzed and proposed a beyond…

信号处理 · 电气工程与系统科学 2023-03-29 Hongyu Li , Shanpu Shen , Bruno Clerckx

This letter considers a beyond diagonal reconfigurable intelligent surface (BD-RIS) aided integrated sensing and communication (ISAC) system, where the BD-RIS can help a multi-antenna base station (BS) serve multiple user equipments (UEs)…

信号处理 · 电气工程与系统科学 2025-08-18 Xiaoqi Zhang , Liang Liu , Shuowen Zhang , Weifeng Zhu , Haijun Zhang

Intelligent reflecting surface (IRS) is an emerging technology to enhance the spectral and energy efficiency of wireless communications cost-effectively. This letter considers a new multi-IRS aided wireless network where a cascaded…

信息论 · 计算机科学 2021-08-12 Weidong Mei , Rui Zhang

Traditional self-interference cancellation (SIC) methods are common in full-duplex (FD) integrated sensing and communication (ISAC) systems. However, exploring new SIC schemes is important due to the limitations of traditional approaches.…

信号处理 · 电气工程与系统科学 2024-10-25 Yu Liu , Gaojie Chen , Yun Wen , Qu Luo , Chiya Zhang , Dusit Niyato