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Integrated sensing and communication (ISAC) uses the same software and hardware resources to achieve both communication and sensing functionalities. Thus, it stands as one of the core technologies of 6G and has garnered significant…

Signal Processing · Electrical Eng. & Systems 2025-02-19 Jiacheng Wang , Changyuan Zhao , Hongyang Du , Geng Sun , Jiawen Kang , Shiwen Mao , Dusit Niyato , Dong In Kim

Dataset augmentation, the practice of applying a wide array of domain-specific transformations to synthetically expand a training set, is a standard tool in supervised learning. While effective in tasks such as visual recognition, the set…

Machine Learning · Statistics 2017-02-21 Terrance DeVries , Graham W. Taylor

The face expression is the first thing we pay attention to when we want to understand a person's state of mind. Thus, the ability to recognize facial expressions in an automatic way is a very interesting research field. In this paper,…

Computer Vision and Pattern Recognition · Computer Science 2024-02-16 Enrico Randellini , Leonardo Rigutini , Claudio Sacca'

WiFi-based sensing has aroused immense attention over recent years. The rationale is that the signal fluctuations caused by humans carry the information of human behavior which can be extracted from the channel state information of WiFi.…

Machine Learning · Computer Science 2021-11-30 Xie Zhang , Chengpei Tang , Yasong An , Kang Yin

Anatomical movements of the human body can change the channel state information (CSI) of wireless signals in an indoor environment. These changes in the CSI signals can be used for human activity recognition (HAR), which is a predominant…

Human-Computer Interaction · Computer Science 2022-05-04 Hojjat Salehinejad , Shahrokh Valaee

Accurate and robust wireless localization is a key enabler for a wide range of mobile computing applications. Fingerprint-based localization using channel state information (CSI) has attracted significant attention due to its high accuracy…

Signal Processing · Electrical Eng. & Systems 2026-03-09 Haoyu Huang , Guangjin Pan , Kaixuan Huang , Shunqing Zhang , Yuhao Zhang , Musa Furkan Keskin , Zheng Xing , Henk Wymeersch

Through-the-Wall radar (TWR) human activity recognition (HAR) is a technology that uses low-frequency ultra-wideband (UWB) signal to detect and analyze indoor human motion. However, the high dependence of existing end-to-end recognition…

Signal Processing · Electrical Eng. & Systems 2024-10-11 Weicheng Gao , Xiaodong Qu , Xiaopeng Yang

WiFi-based home monitoring has emerged as a compelling alternative to traditional camera- and sensor-based solutions, offering wide coverage with minimal intrusion by leveraging existing wireless infrastructure. This paper presents key…

Signal Processing · Electrical Eng. & Systems 2025-06-06 Guozhen Zhu , Yuqian Hu , Chenshu Wu , Wei-Hsiang Wang , Beibei Wang , K. J. Ray Liu

Wireless sensing has made significant progress in tasks ranging from action recognition, vital sign estimation, pose estimation, etc. After over a decade of work, wireless sensing currently stands at the tipping point transitioning from…

Machine Learning · Computer Science 2024-12-09 Qunhang Fu , Fei Wang , Mengdie Zhu , Han Ding , Jinsong Han , Tony Xiao Han

Ambient intelligence, continuously understanding human presence, activity, and physiology in physical spaces, is fundamental to smart environments, health monitoring, and human-computer interaction. WiFi infrastructure provides a…

Machine Learning · Computer Science 2026-02-13 Guozhen Zhu , Yuqian Hu , Sakila Jayaweera , Weihang Gao , Wei-Hsiang Wang , Jiaxuan Zhang , Beibei Wang , Chenshu Wu , K. J. Ray Liu

Recently, deep learning-based positioning systems have gained attention due to their higher performance relative to traditional methods. However, obtaining the expected performance of deep learning-based systems requires large amounts of…

Signal Processing · Electrical Eng. & Systems 2019-06-20 Hamada Rizk , Ahmed Shokry , Moustafa Youssef

Data augmentation is a popular technique largely used to enhance the training of convolutional neural networks. Although many of its benefits are well known by deep learning researchers and practitioners, its implicit regularization…

Computer Vision and Pattern Recognition · Computer Science 2019-06-27 Alex Hernández-García , Peter König

Human Activity Recognition (HAR) is an emerging technology with several applications in surveillance, security, and healthcare sectors. Noninvasive HAR systems based on Wi-Fi Channel State Information (CSI) signals can be developed…

Computer Vision and Pattern Recognition · Computer Science 2022-12-27 Ishtiaque Ahmed Showmik , Tahsina Farah Sanam , Hafiz Imtiaz

Activity recognition computer vision algorithms can be used to detect the presence of autism-related behaviors, including what are termed "restricted and repetitive behaviors", or stimming, by diagnostic instruments. The limited data that…

Computer Vision and Pattern Recognition · Computer Science 2021-01-12 Peter Washington , Aaron Kline , Onur Cezmi Mutlu , Emilie Leblanc , Cathy Hou , Nate Stockham , Kelley Paskov , Brianna Chrisman , Dennis P. Wall

Human doing actions will result in WiFi distortion, which is widely explored for action recognition, such as the elderly fallen detection, hand sign language recognition, and keystroke estimation. As our best survey, past work recognizes…

Signal Processing · Electrical Eng. & Systems 2019-04-29 Fei Wang , Yunpeng Song , Jimuyang Zhang , Jinsong Han , Dong Huang

Data augmentation is a popular technique which helps improve generalization capabilities of deep neural networks. It plays a pivotal role in remote-sensing scenarios in which the amount of high-quality ground truth data is limited, and…

Computer Vision and Pattern Recognition · Computer Science 2019-03-14 Jakub Nalepa , Michal Myller , Michal Kawulok

Wi-Fi sensing has become an attractive option for non-invasive monitoring of human activities and vital signs. This paper explores the feasibility of using state-of-the-art commercial off-the-shelf (COTS) devices for Wi-Fi sensing…

Information Theory · Computer Science 2024-10-23 Jiuyu Liu , Yi Ma , Rahim Tafazolli

We present a method for expanding a dataset by incorporating knowledge from the wide distribution of pre-trained latent diffusion models. Data augmentations typically incorporate inductive biases about the image formation process into the…

Computer Vision and Pattern Recognition · Computer Science 2024-06-13 Orest Kupyn , Christian Rupprecht

Human pose estimation is fundamental to intelligent perception in the Internet of Things (IoT), enabling applications ranging from smart healthcare to human-computer interaction. While WiFi-based methods have gained traction, they often…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Yi Dao , Lankai Zhang , Hao Liu , Haiwei Zhang , Wenbo Wang

Indoor localization has been a hot area of research over the past two decades. Since its advent, it has been steadily utilizing the emerging technologies to improve accuracy, and machine learning has been at the heart of that. Machine…

Computer Vision and Pattern Recognition · Computer Science 2021-01-27 Amr E Hilal , Ismail Arai , Samy El-Tawab