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In this paper, we investigate the use of intelligent reflecting surfaces (IRSs) (i.e., smart mirrors) to relax the line-of-sight requirement of free space optical (FSO) systems. We characterize the impact of the physical parameters of the…

Information Theory · Computer Science 2019-05-06 Marzieh Najafi , Robet Schober

Intelligent reflecting surfaces (IRSs) technology has been considered a promising solution in visible light communication (VLC) systems due to its potential to overcome the line-of-sight (LoS) blockage issue and enhance coverage. Moreover,…

Signal Processing · Electrical Eng. & Systems 2025-04-29 Ahrar N. Hamad , Ahmad Adnan Qidan , Taisir E. H. El-Gorashi , Jaafar M. H. Elmirghani

Millimeter wave (MmWave) communications is capable of supporting multi-gigabit wireless access thanks to its abundant spectrum resource. However, the severe path loss and high directivity make it vulnerable to blockage events, which can be…

Signal Processing · Electrical Eng. & Systems 2020-10-20 Peilan Wang , Jun Fang , Xiaojun Yuan , Zhi Chen , Huiping Duan , Hongbin Li

Reconfigurable intelligent surfaces (RISs) offer a viable way to improve the performance of multi-hop device-to-device (D2D) communication. However, due to the substantial propagation and penetration losses of the millimeter waves…

Networking and Internet Architecture · Computer Science 2025-08-15 Lakshmikanta Sau , Sasthi C. Ghosh

Optical reconfigurable intelligent surface (ORIS) is an emerging technology that can achieve reconfigurable optical propagation environments by precisely adjusting signal's reflection and shape through a large number of passive reflecting…

Signal Processing · Electrical Eng. & Systems 2022-01-24 Haibo Wang , Zaichen Zhang , Bingcheng Zhu , Yidi Zhang

In this paper, we investigate the modeling and design of intelligent reflecting surface (IRS)-assisted optical communication systems which are deployed to relax the line-of-sight (LOS) requirement in multi-link free space optical (FSO)…

Signal Processing · Electrical Eng. & Systems 2021-10-19 Hedieh Ajam , Marzieh Najafi , Vahid Jamali , Bernhard Schmauss , Robert Schober

We present in this paper a new algorithm for urban traffic light control with mixed traffic (communicating and non communicating vehicles) and mixed infrastructure (equipped and unequipped junctions). We call equipped junction here a…

Systems and Control · Computer Science 2017-08-22 Cyril Nguyen Van Phu , Nadir Farhi , Habib Haj-Salem , Jean-Patrick Lebacque

This paper presents a protocol that optimizes message dissemination in C-V2X technology, crucial for advancing intelligent transportation systems (ITS) aimed at enhancing road safety. As vehicle density and velocity rise, the volume of data…

Networking and Internet Architecture · Computer Science 2024-10-08 Lanre Sadeeq , Qasim Ajao

Accurate localization can be performed in visible light systems in non-line-of-sight (NLOS) scenarios by utilizing intelligent reflecting surfaces (IRSs), which are commonly in the form of mirror arrays with adjustable orientations. When…

Information Theory · Computer Science 2024-07-16 Issifu Iddrisu , Sinan Gezici

EMERGENCY alert in case of any accident is vitally necessitated to rescue the victims. And so, this paper is made to present the results of a major analysis relating to emergency alert conditions at the time of collision (automobile). In…

Networking and Internet Architecture · Computer Science 2022-05-17 Shafin Talukder , SK. Tasnim Bari Ira , Aseya Khanom , Prantika Biswas Sneha , Wardah Saleh

In this paper, we propose to use a hybrid relay-reflecting intelligent surface (HR-RIS) to enhance the performance of a covert communication system. Specifically, the HR-RIS consists of passive reflecting elements and active relay elements…

Information Theory · Computer Science 2023-06-22 Jinsong Hu , Xiaoqiang Shi , Youjia Chen , Tiesong Zhao , Feng Shu

The target sensing/localization performance is fundamentally limited by the line-of-sight link and severe signal attenuation over long distances. This paper considers a challenging scenario where the direct link between the base station…

Information Theory · Computer Science 2023-09-27 Meng Hua , Qingqing Wu , Wen Chen , Zesong Fei , Hing Cheung So , Chau Yuen

An indoor robot navigation system is investigated, where an intelligent reflecting surface (IRS) is employed to enhance the connectivity between the access point (AP) and a mobile robotic user. The considered system is optimized for…

Signal Processing · Electrical Eng. & Systems 2020-09-25 Xidong Mu , Yuanwei Liu , Li Guo , Jiaru Lin , Robert Schober

Intersections are critical areas of the transportation infrastructure associated with 47% of all road accidents. Vehicle-to-vehicle (V2V) communication has the potential of preventing up to 35% of such serious road collisions. In fact,…

Information Theory · Computer Science 2017-07-12 Mouhamed Abdulla , Henk Wymeersch

Around-the-corner radar (ACR) sensing of targets in non-line-of-sight (NLOS) conditions has been explored for security and surveillance applications and look-ahead warning systems in automotive scenarios. Here, the targets are detected…

Signal Processing · Electrical Eng. & Systems 2026-02-13 Kainat Yasmeen , Debidas Kundu , Shobha Sundar Ram

Unmanned aerial vehicles (UAVs) are envisioned to be extensively employed for assisting wireless communications in Internet of Things (IoT) applications. On the other hand, terahertz (THz) enabled intelligent reflecting surface (IRS) is…

Information Theory · Computer Science 2022-04-04 Milad Tatar Mamaghani , Yi Hong

The integration of Optical Intelligent Reflective Surfaces (OIRSs) into Visible Light Communication (VLC) systems is gaining momentum as a valid alternative to RF technologies, harnessing the existing lighting infrastructures and the vast…

Most intelligent reflecting surface (IRS)-aided indoor visible light communication (VLC) studies ignore the time delays introduced by reflected paths, even though these delays are inherent in practical wideband systems. In this work, we…

Information Theory · Computer Science 2026-03-10 Rashid Iqbal , Ahmed Zoha , Salama Ikki , Muhammad Ali Imran , Hanaa Abumarshoud

Intelligent Transportation System (ITS) is a vision which offers safe, secure and smart travel experience to drivers. This futuristic plan aims to enable vehicles, roadside transportation infrastructures, pedestrian smart-phones and other…

Cryptography and Security · Computer Science 2020-09-28 Maanak Gupta , James Benson , Farhan Patwa , Ravi Sandhu

In this paper, we investigate integrated sensing and communication (ISAC) in high-mobility systems with the aid of an intelligent reflecting surface (IRS). To exploit the benefits of Delay-Doppler (DD) spread caused by high mobility,…

Information Theory · Computer Science 2024-08-01 Xingyu Peng , Qin Tao , Xiaoling Hu , Richeng Jin , Chongwen Huang , Xiaoming Chen