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In near future, vulnerable road users (VRUs) such as cyclists and pedestrians will be equipped with smart devices and wearables which are capable to communicate with intelligent vehicles and other traffic participants. Road users are then…

Computer Vision and Pattern Recognition · Computer Science 2018-08-15 Maarten Bieshaar , Malte Depping , Jan Schneegans , Bernhard Sick

Intelligent reflection surface (IRS) is emerging as a promising technique for future wireless communications. Considering its excellent capability in customizing the channel conditions via energy-focusing and energy-nulling, it is an ideal…

Information Theory · Computer Science 2021-08-31 Shihao Yan , Xiaobo Zhou , Derrick Wing Kwan Ng , Jinhong Yuan , Naofal Al-Dhahir

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…

Information Theory · Computer Science 2024-05-07 Jintao Luo , Sixing Yin

In this paper, we propose to utilize intelligent reflecting surfaces (IRSs) for enhancing the physical layer security of wireless communications systems. In particular, an IRS-assisted secure wireless system is considered, where a…

Information Theory · Computer Science 2020-02-26 Xianghao Yu , Dongfang Xu , Robert Schober

Smart homes are further development of intelligent buildings and home automation, where context awareness and autonomous behaviour are added. They are based on a combination of the Internet and emerging technologies like wireless sensor…

Networking and Internet Architecture · Computer Science 2019-04-03 Per Lynggaard

This work presents a smart trespasser detection and alert system which aims to increase the amount of security as well as the likelihood of positively identifying or stopping trespassers and intruders as compared to other commonly deployed…

Computers and Society · Computer Science 2015-10-01 Manish Kumar , Shubham Kaul

Both GPS and WiFi based localization have been exploited in recent years, yet most researches focus on localizing at home without environment context. Besides, the near home or workplace area is complex and has little attention in smart…

Networking and Internet Architecture · Computer Science 2017-02-16 Qichuan Yang , Zhiqiang He , Kai Zhao , Tian Gao

WiFi fingerprinting is one of the mainstream technologies for indoor localization. However, it requires an initial calibration phase during which the fingerprint database is built manually. This process is labour intensive and needs to be…

Computers and Society · Computer Science 2021-06-28 Ahmed Shokry , Moustafa Elhamshary , Moustafa Youssef

Wireless Fidelity or Wi-Fi, has completely transfigured wireless networking by offering a smooth connection to the internet and networks, particularly when dealing with enclosed environments. As with the majority of wireless technology, it…

Emerging Technologies · Computer Science 2025-02-12 Aditya Mitra , Anisha Ghosh , Sibi Chakkaravarthy S , Devi Priya VS

Since Internet of Things (IoT) is suggested as the fundamental platform to adapt massive connections and secure transmission, we study physical-layer authentication in the point-to-point wireless systems relying on reconfigurable…

Signal Processing · Electrical Eng. & Systems 2022-05-30 Dinh-Thuan Do , Anh-Tu Le , Shahid Mumtaz

In this paper, we propose rWiFiSLAM, an indoor localisation system based on WiFi ranging measurements. Indoor localisation techniques play an important role in mobile robots when they cannot access good quality GPS signals in indoor…

Networking and Internet Architecture · Computer Science 2022-12-19 Bo Wei , Mingcen Gao , Chengwen Luo , Sen Wang , Jin Zhang

In this paper, we present an unsupervised learning approach to identify the user points of interest (POI) by exploiting WiFi measurements from smartphone application data. Due to the lack of GPS positioning accuracy in indoor, sheltered,…

Machine Learning · Computer Science 2021-05-11 Sumudu HasalaMarakkalage , Billy Pik Lik Lau , Yuren Zhou , Ran Liu , Chau Yuen , Wei Quin Yow , Keng Hua Chong

Intelligent reflecting surface (IRS) is an emerging technology that is able to significantly improve the performance of wireless communications, by smartly tuning signal reflections at a large number of passive reflecting elements. On the…

Signal Processing · Electrical Eng. & Systems 2023-02-14 Xiaodan Shao , Changsheng You , Rui Zhang

Intelligent reflecting surface (IRS) can effectively enhance the energy and spectral efficiency of wireless communication system through the use of a large number of lowcost passive reflecting elements. In this paper, we investigate…

Networking and Internet Architecture · Computer Science 2020-07-21 Yuan Zheng , Suzhi Bi , Ying-Jun Angela Zhang , Hui Wang

Intelligent reflecting surface (IRS) that enables the control of the wireless propagation environment has been looked upon as a promising technology for boosting the spectrum and energy efficiency in future wireless communication systems.…

Signal Processing · Electrical Eng. & Systems 2020-02-26 Samith Abeywickrama , Rui Zhang , Chau Yuen

Due to the openness of the wireless medium, smartphone users are susceptible to user privacy attacks, where user privacy information is inferred from encrypted Wi-Fi wireless traffic. Existing attacks are limited to recognizing mobile apps…

Cryptography and Security · Computer Science 2025-11-06 Yong Huang , Zhibo Dong , Xiaoguang Yang , Dalong Zhang , Qingxian Wang , Zhihua Wang

Wi-Fi Channel State Information (CSI) enables device-free human activity recognition, but existing multi-user approaches assume a fixed set of known users during both training and inference. This closed-set assumption limits deployment, as…

Machine Learning · Computer Science 2026-04-21 Kemal Bayik , Olayinka Ajayi , Daniel Roggen , Philip Birch

Locating the persons moving through an environment without the necessity of them being equipped with special devices has become vital for many applications including security, IoT, healthcare, etc. Existing device-free indoor localization…

Signal Processing · Electrical Eng. & Systems 2024-09-04 Mohamed Mohsen , Hamada Rizk , Hirozumi Yamaguch , Moustafa Youssef

The accuracy of indoor wireless localization systems can be substantially enhanced by map-awareness, i.e., by the knowledge of the map of the environment in which localization signals are acquired. In fact, this knowledge can be exploited…

Information Theory · Computer Science 2014-02-18 Francesco Montorsi , Fabrizio Pancaldi , Giorgio M. Vitetta

Internet-connected devices are increasingly present in our homes, and privacy breaches, data thefts, and security threats are becoming commonplace. In order to avoid these, we must first understand the behaviour of these devices. In this…

Networking and Internet Architecture · Computer Science 2018-03-15 Yousef Amar , Hamed Haddadi , Richard Mortier , Anthony Brown , James Colley , Andy Crabtree