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A novel reconfigurable intelligent surfaces (RISs)-based transmission framework is proposed for downlink non-orthogonal multiple access (NOMA) networks. We propose a quality-of-service (QoS)-based clustering scheme to improve the resource…

信号处理 · 电气工程与系统科学 2021-11-05 Yixuan Zou , Yuanwei Liu , Kaifeng Han , Xiao Liu , Kok Keong Chai

Non-orthogonal multiple access (NOMA) allows multiple users to simultaneously access the same time-frequency resource by using superposition coding and successive interference cancellation (SIC). Thus far, most papers on NOMA have focused…

信息论 · 计算机科学 2017-12-12 Lei You , Lei Lei , Di Yuan , Sumei Sun , Symeon Chatzinotas , Björn Ottersten

This paper focuses on the fundamental problem of maximizing the achievable weighted sum rate (WSR) at information receivers (IRs) in an intelligent reflecting surface (IRS) assisted simultaneous wireless information and power transfer…

信号处理 · 电气工程与系统科学 2023-03-02 Vaibhav Kumar , Anastasios Papazafeiropoulos , Muhammad Fainan Hanif , Le-Nam Tran , Mark F. Flanagan

This paper investigates intelligent reflecting surface (IRS)-aided multicell wireless networks, where an IRS is deployed to assist the joint processing coordinated multipoint (JP-CoMP) transmission from multiple base stations (BSs) to…

信息论 · 计算机科学 2020-12-01 Meng Hua , Qingqing Wu , Derrick Wing Kwan Ng , Jun Zhao , Luxi Yang

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…

信息论 · 计算机科学 2020-05-15 Xianghao Yu , Dongfang Xu , Derrick Wing Kwan Ng , Robert Schober

A simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided communication system is investigated, where an access point sends information to two users located on each side of the STAR-RIS. Different from…

信息论 · 计算机科学 2022-09-14 Yuanwei Liu , Xidong Mu , Robert Schober , H. Vincent Poor

Non-orthogonal multiple access (NOMA) enables multiple users to share the same frequency band, and simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) provides 360-degree full-space coverage, optimizing…

网络与互联网体系结构 · 计算机科学 2025-03-21 Yu Min Park , Sheikh Salman Hassan , Yan Kyaw Tun , Eui-Nam Huh , Walid Saad , Choong Seon Hong

Intelligent reflecting surfaces (IRSs) are emerging as promising enablers for the next generation of wireless communication systems, because of their ability to customize favorable radio propagation environments. However, with the…

信息论 · 计算机科学 2021-11-25 Dongfang Xu , Xianghao Yu , Derrick Wing Kwan Ng , Robert Schober

This paper investigates an intelligent reflecting surface (IRS)-aided movable antenna (MA) system, where multiple IRSs cooperate with a multi-MA base station to extend wireless coverage to multiple target areas. The objective is to maximize…

信号处理 · 电气工程与系统科学 2026-01-15 Ying Gao , Qingqing Wu , Weidong Mei , Guangji Chen , Wen Chen , Ziyuan Zheng

This paper concentrates on the problem of associating an intelligent reflecting surface (IRS) to multiple users in a multiple-input single-output (MISO) downlink wireless communication network. The main objective of the paper is to maximize…

信号处理 · 电气工程与系统科学 2024-10-10 Hamid Amiriara , Farid Ashtiani , Mahtab Mirmohseni , Masoumeh Nasiri-Kenari

In this paper, the queue-aware simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RIS) assisted non-orthogonal multiple access (NOMA) communication system is investigated to ensure the system stability,…

信息论 · 计算机科学 2022-02-28 Nannan Zhang , Yuanwei Liu , Xidong Mu , Wei Wang

Simultaneously reflecting and transmitting reconfigurable intelligent surfaces (STAR-RIS) has recently emerged as prominent technology that exploits the transmissive property of RIS to mitigate the half-space coverage limitation of…

信号处理 · 电气工程与系统科学 2024-04-01 Muhammad Faraz Ul Abrar , Muhammad Talha , Rafay Iqbal Ansari , Syed Ali Hassan , Haejoon Jung

This paper investigates the benefits of integrating reconfigurable intelligent surface (RIS) on minimizing the average sum age of information (AoI) in uplink non-orthogonal multiple access-based Internet-of-Things (IoT) networks. In this…

信息论 · 计算机科学 2022-03-01 Ali Muhammad , Mohamed Elhattab , Mohamed Amine Arfaoui , Chadi Assi

This paper considers an intelligent reflecting surface (IRS) assisted multi-input multi-output (MIMO) power splitting (PS) based simultaneous wireless information and power transfer (SWIPT) system with multiple PS receivers (PSRs). The…

信息论 · 计算机科学 2021-06-01 Chen He , Xie Xie , Kun Yang , Z. Jane Wang

In this letter, the achievable rate maximization problem is considered for intelligent reflecting surface (IRS) assisted multiple-input multiple-output (MIMO) systems in an underlay spectrum sharing scenario, subject to interference power…

信息论 · 计算机科学 2022-06-10 Vaibhav Kumar , Mark Flanagan , Rui Zhang , Le-Nam Tran

Intelligent reflecting surface (IRS) technology offers more feasible propagation paths for millimeter-wave (mmWave) communication systems to overcome blockage than existing technologies. In this paper, we consider a downlink wireless system…

信号处理 · 电气工程与系统科学 2021-01-22 Yue Xiu , Yang Zhao , Yang Liu , Jun Zhao , Osman Yagan , Ning Wei

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…

信息论 · 计算机科学 2021-03-16 Qingqing Wu , Xiaobo Zhou , Robert Schober

This letter investigates the joint active and passive beamforming optimization for intelligent reflecting surface (IRS) aided multiuser multiple-input multiple-output systems with the objective of maximizing the weighted sum-rate. We show…

信息论 · 计算机科学 2021-01-28 Xingyu Zhao , Tian Lin , Yu Zhu

Intelligent reflecting surface (IRS)-assisted mobile edge computing (MEC) systems have shown notable improvements in efficiency, such as reduced latency, higher data rates, and better energy efficiency. However, the resource competition…

信号处理 · 电气工程与系统科学 2026-04-28 Yinyu Wu , Xuhui Zhang , Yingchao Jiao , Jinke Ren , Yanyan Shen , Bo Yang , Shuqiang Wang , Dusit Niyato

Intelligent reflecting surface (IRS) has been widely studied in recent years, it has emerged as a new technology which can reflect the incident signal by intelligently configuring the reflection elements, thus changing the signal…

信息论 · 计算机科学 2024-05-07 Jintao Luo , Sixing Yin