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Automated vehicles need to detect and classify objects and traffic participants accurately. Reliable object classification using automotive radar sensors has proved to be challenging. We propose a method that combines classical radar signal…

Machine Learning · Computer Science 2022-02-18 Adriana-Eliza Cozma , Lisa Morgan , Martin Stolz , David Stoeckel , Kilian Rambach

Vision-based human activity recognition has emerged as one of the essential research areas in video analytics domain. Over the last decade, numerous advanced deep learning algorithms have been introduced to recognize complex human actions…

Computer Vision and Pattern Recognition · Computer Science 2022-08-11 Hayat Ullah , Arslan Munir

There is an increasing demand for intelligent processing on emerging ultra-low-power internet of things (IoT) devices, and recent works have shown substantial efficiency boosts by executing inference tasks directly on the IoT device (node)…

Signal Processing · Electrical Eng. & Systems 2022-04-29 Cyan Subhra Mishra , Jack Sampson , Mahmut Taylan Kandemir , Vijaykrishnan Narayanan

Most recent work on vision-based human activity recognition (HAR) focuses on designing complex deep learning models for the task. In so doing, there is a requirement for large datasets to be collected. As acquiring and processing large…

Computer Vision and Pattern Recognition · Computer Science 2020-04-30 Bruce X. B. Yu , Yan Liu , Keith C. C. Chan

Human Activity Recognition (HAR) plays a significant role in the everyday life of people because of its ability to learn extensive high-level information about human activity from wearable or stationary devices. A substantial amount of…

Signal Processing · Electrical Eng. & Systems 2022-09-09 Md. Milon Islam , Sheikh Nooruddin , Fakhri Karray , Ghulam Muhammad

The pervasiveness of Wi-Fi signals provides significant opportunities for human sensing and activity recognition in fields such as healthcare. The sensors most commonly used for passive Wi-Fi sensing are based on passive Wi-Fi radar (PWR)…

Signal Processing · Electrical Eng. & Systems 2022-09-09 Armand K. Koupai , Mohammud J. Bocus , Raul Santos-Rodriguez , Robert J. Piechocki , Ryan McConville

Deep learning-based (DL-based) channel state information (CSI) feedback for a Massive multiple-input multiple-output (MIMO) system has proved to be a creative and efficient application. However, the existing systems ignored the wireless…

Signal Processing · Electrical Eng. & Systems 2021-10-13 Haozhen Li , Boyuan Zhang , Xin Liang , Haoran Chang , Xinyu Gu , Lin Zhang

Accurate and efficient estimation of the high dimensional channels is one of the critical challenges for practical applications of massive multiple-input multiple-output (MIMO). In the context of hybrid analog-digital (HAD) transceivers,…

Information Theory · Computer Science 2022-02-08 Jiabao Gao , Caijun Zhong , Geoffrey Ye Li , Zhaoyang Zhang

Deep learning based landcover classification algorithms have recently been proposed in literature. In hyperspectral images (HSI) they face the challenges of large dimensionality, spatial variability of spectral signatures and scarcity of…

Computer Vision and Pattern Recognition · Computer Science 2017-06-28 Anirban Santara , Kaustubh Mani , Pranoot Hatwar , Ankit Singh , Ankur Garg , Kirti Padia , Pabitra Mitra

Human Activity Recognition (HAR) is the identification and classification of static and dynamic human activities, which find applicability in domains like healthcare, entertainment, security, and cyber-physical systems. Traditional HAR…

Signal Processing · Electrical Eng. & Systems 2025-01-27 Nuno Paulino , Mariana Oliveira , Francisco Ribeiro , Luís Outeiro , Pedro A. Lopes , Francisco Vilarinho , Sofia Inácio , Luís M. Pessoa

Drone-camera based human activity recognition (HAR) has received significant attention from the computer vision research community in the past few years. A robust and efficient HAR system has a pivotal role in fields like video…

Computer Vision and Pattern Recognition · Computer Science 2022-11-11 Santosh Kumar Yadav , Esha Pahwa , Achleshwar Luthra , Kamlesh Tiwari , Hari Mohan Pandey , Peter Corcoran

The recognition of human activities based on WiFi Channel State Information (CSI) enables contactless and visual privacy-preserving sensing in indoor environments. However, poor model generalization, due to varying environmental conditions…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Julian Strohmayer , Martin Kampel

Human Activity Recognition has gained significant attention due to its diverse applications, including ambient assisted living and remote sensing. Wearable sensor-based solutions often suffer from user discomfort and reliability issues,…

WiFi sensing is an emerging technology that utilizes wireless signals for various sensing applications. However, the reliance on supervised learning, the scarcity of labelled data, and the incomprehensible channel state information (CSI)…

Signal Processing · Electrical Eng. & Systems 2024-10-04 B. Barahimi , H. Tabassum , M. Omer , O. Waqar

Indoor localization becomes a raising demand in our daily lives. Due to the massive deployment in the indoor environment nowadays, WiFi systems have been applied to high accurate localization recently. Although the traditional model based…

Signal Processing · Electrical Eng. & Systems 2019-02-19 Chenlu Xiang , Zhichao Zhang , Shunqing Zhang , Shugong Xu , Shan Cao , Vincent LAU

Hybrid beamforming is a promising technology for 5G millimetre-wave communications. However, its implementation is challenging in practical multiple-input multiple-output (MIMO) systems because non-convex optimization problems have to be…

Signal Processing · Electrical Eng. & Systems 2021-07-09 Hamed Hojatian , Vu Nguyen Ha , Jérémy Nadal , Jean-François Frigon , François Leduc-Primeau

Location-based services (LBS) are witnessing a rise in popularity owing to their key features of delivering powerful and personalized digital experiences. The recent developments in wireless sensing techniques make the realization of…

Signal Processing · Electrical Eng. & Systems 2023-05-30 Osamah A. Abdullah , Hayder Al-Hraishawi , Symeon Chatzinotas

This paper presents end-to-end learning from spectrum data - an umbrella term for new sophisticated wireless signal identification approaches in spectrum monitoring applications based on deep neural networks. End-to-end learning allows to…

Networking and Internet Architecture · Computer Science 2017-12-13 Merima Kulin , Tarik Kazaz , Ingrid Moerman , Eli de Poorter

Sensor-based Human Activity Recognition (HAR) is a core technology that enables intelligent systems to perceive and interact with their environment. However, multimodal HAR systems still encounter key challenges, such as difficulties in…

Computer Vision and Pattern Recognition · Computer Science 2025-08-27 Panpan Ji , Junni Song , Yifan Lu , Hang Xiao , Hanyu Liu , Chao Li

Compared to current AI or robotic systems, humans navigate their environment with ease, making tasks such as data collection trivial. However, humans find it harder to model complex relationships hidden in the data. AI systems, especially…

Artificial Intelligence · Computer Science 2022-06-17 Ryan Nguyen , Rahul Rai