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A novel simultaneously transmitting and reflecting (STAR) system design relying on reconfigurable intelligent surfaces (RISs) is conceived. First, an existing prototype is reviewed and the potential benefits of STAR-RISs are discussed.…

Information Theory · Computer Science 2022-09-14 Yuanwei Liu , Xidong Mu , Jiaqi Xu , Robert Schober , Yang Hao , H. Vincent Poor , Lajos Hanzo

The reconfigurable intelligent surface (RIS) technology for metasurfaces is ushering in a new paradigm for wireless communication systems. It provides an accessible way for controlling the interaction between electromagnetic waves with the…

Signal Processing · Electrical Eng. & Systems 2026-01-21 P. H. C. de Souza , M. Khazaee , L. L. Mendes

This paper considers a hybrid reconfigurable environment comprising a UAV-mounted reflecting RIS, an outdoor STAR-RIS enabling simultaneous transmission and reflection, and an indoor holographic RIS (H-RIS), jointly enhancing secure…

Networking and Internet Architecture · Computer Science 2026-02-02 Elhadj Moustapha Diallo , Mamadou Aliou Diallo , Abusaeed B. M. Adam , Muhammad Naeem Shah

Vehicle-to-Everything (V2X) communications play a crucial role in ensuring safe and efficient modern transportation systems. However, challenges arise in scenarios with buildings, leading to signal obstruction and coverage limitations. To…

Networking and Internet Architecture · Computer Science 2023-08-17 Pyae Sone Aung , Loc X. Nguyen , Yan Kyaw Tun , Zhu Han , Choong Seon Hong

A novel movable-element (ME) enabled simultaneously transmitting and reflecting surface (ME-STARS)-aided secure communication system is investigated. Against the full-space eavesdropping, MEs are deployed at the STARS for enhancing the…

Signal Processing · Electrical Eng. & Systems 2025-07-22 Jingjing Zhao , Qian Xu , Kaiquan Cai , Yanbo Zhu , Xidong Mu , Yuanwei Liu

\underline{S}imultaneous \underline{t}ransmitting \underline{a}nd \underline{r}eflecting \underline{s}urface (STARS)-assisted systems have emerged to fill this gap by providing $ 360^{\circ}$ wireless coverage. In parallel, full-duplex (FD)…

In this work, novel physical layer security (PLS) schemes are proposed for orthogonal frequency-division multiplexing (OFDM) to secure both data and pilots. The majority of previous studies focus on only securing the data without…

Signal Processing · Electrical Eng. & Systems 2021-10-25 Salah Eddine Zegrar , Haji M. Furqan , Huseyin Arslan

In this paper, the sensing beam pattern gain under simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RIS)-enabled integrated sensing and communications (ISAC) systems is investigated, in which multiple…

Information Theory · Computer Science 2024-02-07 Shuang Zhang , Wanming Hao , Gangcan Sun , Zhengyu Zhu , Xingwang Li , Qingqing Wu

This paper explores the use of reconfigurable intelligent surfaces (RIS) in mitigating cross-system interference in spectrum sharing and secure wireless applications. Unlike conventional RIS that can only adjust the phase of the incoming…

Information Theory · Computer Science 2023-07-03 Fangzhou Wang , A. Lee Swindlehurst

This work peruses a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) based wireless system wherein untrusted energy harvesting nodes wiretap the legitimate signal. The achievable secrecy rate and the…

Information Theory · Computer Science 2022-10-18 Mohammad Reza Kavianinia , Mohammad Javad Emadi

Dual-function radar-communication (DFRC) technology is emerging in next-generation wireless systems. Reconfigurable intelligent surface (RIS) arrays have been suggested as a crucial sensor component of the DFRC. In this paper, we propose a…

Signal Processing · Electrical Eng. & Systems 2026-03-13 Zhuoyang Liu , Haiyang Zhang , Tianyao Huang , Feng Xu , Yonina C. Eldar

Simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) have been attracting significant attention in both academia and industry for their advantages of achieving 360{\deg} coverage and enhanced degrees of…

Information Theory · Computer Science 2025-06-13 Yuanwei Liu , Jiaqi Xu , Zhaolin Wang , Xidong Mu , Jianhua Zhang , Ping Zhang

Well-designed simultaneously transmitting and reflecting RIS (STAR-RIS), which extends the half-space coverage to full-space coverage, incurs wireless communication environments to be smart and reconfigurable. In this paper, we survey how…

Information Theory · Computer Science 2022-10-18 Mohammad Reza Kavianinia , Mohammad Javad Emadi

Reconfigurable intelligent surfaces (RISs) have been extensively applied in integrated sensing and communication (ISAC) systems due to the capability of enhancing physical layer security (PLS). However, conventional static RIS architectures…

Signal Processing · Electrical Eng. & Systems 2025-12-24 Ling Zhuang , Ximing Xie , Fang Fang , Ali Attaran , Zhizhong Zhang

In this paper, we use a reconfigurable intelligent surface (RIS) to enhance the radar sensing and communication capabilities of a mmWave dual function radar communication system. To simultaneously localize the target and to serve the user,…

Signal Processing · Electrical Eng. & Systems 2021-05-06 R. S. Prasobh Sankar , Battu Deepak , Sundeep Prabhakar Chepuri

Simultaneous wireless information and power transfer (SWIPT) is an effective energy-saving technology, but its efficiency is hindered by environmental factors. The introduction of reconfigurable intelligent surfaces (RIS) has alleviated…

Networking and Internet Architecture · Computer Science 2024-03-18 Junlong Yang

Sixth-Generation (6G) wireless networks aim to support innovative Internet-of-Things (IoT) applications that demand faster and more secure data transmission. While higher Open Systems Interconnection (OSI) layers employ measures like…

Signal Processing · Electrical Eng. & Systems 2025-06-30 Dimitris Kompostiotis , Dimitris Vordonis , Vassilis Paliouras , George C. Alexandropoulos

This paper considers a MIMO secure wireless communication system aided by the physical layer security technique of sending artificial noise (AN). To further enhance the system security performance, the advanced intelligent reflecting…

Signal Processing · Electrical Eng. & Systems 2020-09-15 Sheng Hong , Cunhua Pan , Hong Ren , Kezhi Wang , Arumugam Nallanathan

This paper investigates the design of integrated sensing and communication (ISAC) systems assisted by simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs), which act as multi-functional programmable…

Signal Processing · Electrical Eng. & Systems 2026-02-19 Ziming Liu , Tao Chen , Giacinto Gelli , Vincenzo Galdi , Francesco Verde

In this letter, we investigate the secrecy rate of an reconfigurable intelligent surface (RIS)-aided millimeter-wave (mmWave) system with hardware limitations. Compared to the RIS-aided systems in most existing works, we consider the case…

Signal Processing · Electrical Eng. & Systems 2021-02-04 Yue Xiu , Jun Zhao , Zhongpei Zhang