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This paper investigates the security enhancement of an intelligent reflecting surface (IRS) assisted non-orthogonal multiple access (NOMA) network, where a distributed IRS enabled NOMA transmission framework is proposed to serve users…

Information Theory · Computer Science 2021-04-16 Zheng Zhang , Jian Chen , Qingqing Wu , Yuanwei Liu , Lu Lv , Xunqi Su

We investigate the fundamental multiple access (MA) scheme in an active intelligent reflecting surface (IRS) aided energy-constrained Internet-of-Things (IoT) system, where an active IRS is deployed to assist the uplink transmission from…

Information Theory · Computer Science 2022-02-01 Guangji Chen , Qingqing Wu , Chong He , Wen Chen , Jie Tang , Shi Jin

The combination of non-orthogonal multiple access (NOMA) and intelligent reflecting surface (IRS) is an efficient solution to significantly enhance the energy efficiency of the wireless communication system. In this paper, we focus on a…

Signal Processing · Electrical Eng. & Systems 2020-09-15 Ximing Xie , Fang Fang , Zhiguo Ding

Intelligent reflecting surface (IRS) enhanced multi-unmanned aerial vehicle (UAV) non-orthogonal multiple access (NOMA) networks are investigated. A new transmission framework is proposed, where multiple UAV-mounted base stations employ…

Information Theory · Computer Science 2021-10-07 Xidong Mu , Yuanwei Liu , Li Guo , Jiaru Lin , H. Vincent Poor

This letter investigates secure transmission in an intelligent reflecting surface (IRS) assisted non-orthogonal multiple access (NOMA) network. Consider a practical eavesdropping scenario with imperfect channel state information of the…

Information Theory · Computer Science 2020-09-02 Zheng Zhang , Lu Lv , Qingqing Wu , Hao Deng , Jian Chen

This paper proposes a novel framework of resource allocation in multi-cell intelligent reflecting surface (IRS) aided non-orthogonal multiple access (NOMA) networks, where an IRS is deployed to enhance the wireless service. The problem of…

Signal Processing · Electrical Eng. & Systems 2020-11-16 Wanli Ni , Xiao Liu , Yuanwei Liu , Hui Tian , Yue Chen

A novel framework of intelligent reflecting surface (IRS)-aided multiple-input single-output (MISO) non-orthogonal multiple access (NOMA) network is proposed, where a base station (BS) serves multiple clusters with unfixed number of users…

Signal Processing · Electrical Eng. & Systems 2021-12-02 X. Gao , Y. Liu , X. Liu , L. Song

A dual-polarized intelligent reflecting surface (IRS) can contribute to a better multiplexing of interfering wireless users. In this paper, we use this feature to improve the performance of dual-polarized massive multiple-input…

A novel intelligent reflecting surface (IRS)-aided multi-robot network is proposed, where multiple mobile wheeled robots are served by an access point (AP) through non-orthogonal multiple access (NOMA). The goal is to maximize the sum-rate…

Robotics · Computer Science 2020-11-26 Xinyu Gao , Yuanwei Liu , Xidong Mu

Intelligent reflecting surface (IRS) is a promising technology to improve the performance of wireless powered communication networks (WPCNs) due to its capability to reconfigure signal propagation environments via smart reflection. In…

Information Theory · Computer Science 2021-03-16 Qingqing Wu , Xiaobo Zhou , Robert Schober

The fundamental capacity limits of intelligent reflecting surface (IRS)-assisted multi-user wireless communication systems are investigated in this paper. Specifically, the capacity and rate regions for both capacity-achieving…

Information Theory · Computer Science 2021-08-03 Xidong Mu , Yuanwei Liu , Li Guo , Jiaru Lin , Naofal Al-Dhahir

In this paper, we propose a downlink multiple-input single-output (MISO) transmission scheme, which is assisted by an intelligent reflecting surface (IRS) consisting of a large number of passive reflecting elements. In the literature, it…

Information Theory · Computer Science 2019-12-30 Jianyue Zhu , Yongming Huang , Jiaheng Wang , Keivan Navaie , Zhiguo Ding

Energy-efficient design is of crucial importance in wireless internet of things (IoT) networks. In order to serve massive users while achieving an energy-efficient operation, an intelligent reflecting surface (IRS) assisted mobile edge…

Systems and Control · Electrical Eng. & Systems 2021-09-22 Qun Wang , Fuhui Zhou , Han Hu , Rose Qingyang Hu

In this paper, the appealing features of a dual-polarized intelligent reflecting surface (IRS) are exploited to improve the performance of dual-polarized massive multiple-input multiple-output (MIMO) with non-orthogonal multiple access…

This paper proposes a novel network framework of intelligent reflecting surface (IRS)-assisted simultaneous wireless information and power transfer (SWIPT) non-orthogonal multiple access (NOMA) networks, where IRS is used to enhance the…

Information Theory · Computer Science 2021-05-17 Zhendong Li , Wen Chen , Qingqing Wu , Kunlun Wang , Jun Li

Reflecting intelligent surfaces (RIS) has gained significant attention due to its high energy and spectral efficiency in next-generation wireless networks. By using low-cost passive reflecting elements, RIS can smartly reconfigure the…

Signal Processing · Electrical Eng. & Systems 2023-04-03 Wali Ullah Khan , Eva Lagunas , Asad Mahmood , Zain Ali , Muhammad Asif Symeon Chatzinotas , Björn Ottersten

Power-domain non-orthogonal multiple access (NOMA) has become a promising technology to exploit the new dimension of the power domain to enhance the spectral efficiency of wireless networks. However, most existing NOMA schemes rely on the…

Signal Processing · Electrical Eng. & Systems 2020-03-24 Min Fu , Yong Zhou , Yuanming Shi , Khaled B. Letaief

In this paper, we consider intelligent reflecting surface (IRS) in a non-orthogonal multiple access (NOMA)-aided Integrated Sensing and Multicast-Unicast Communication (ISMUC) system, where the multicast signal is used for sensing and…

Information Theory · Computer Science 2023-07-27 Yang Gou , Yinghui Ye , Guangyue Lu , Lu Lv , Rose Qingyang Hu

This article focuses on the exploitation of reconfigurable intelligent surfaces (RISs) in multi-user networks employing orthogonal multiple access (OMA) or non-orthogonal multiple access (NOMA), with an emphasis on investigating the…

Information Theory · Computer Science 2022-09-14 Yuanwei Liu , Xidong Mu , Xiao Liu , Marco Di Renzo , Zhiguo Ding , Robert Schober

A novel framework of intelligent reflecting surface (IRS)-aided multiple-input single-output (MISO) non-orthogonal multiple access (NOMA) network is proposed, where a base station (BS) serves multiple clusters with unfixed number of users…

Information Theory · Computer Science 2020-12-02 Xinyu Gao , Yuanwei Liu , Xiao Liu , Zhijin Qin