WiFi CSI-based device-free sensing: from Fresnel zone model to CSI-ratio model

D Wu, Y Zeng, F Zhang, D Zhang - CCF Transactions on Pervasive …, 2022 - Springer
Over the past decade, WiFi CSI-based device-free sensing technology has shown great
potential in smart homes, assisted living, and many other applications. While model-based …

Channel state information from pure communication to sense and track human motion: A survey

MAA Al-Qaness, M Abd Elaziz, S Kim, AA Ewees… - Sensors, 2019 - mdpi.com
Human motion detection and activity recognition are becoming vital for the applications in
smart homes. Traditional Human Activity Recognition (HAR) mechanisms use special …

CrossSense: Towards cross-site and large-scale WiFi sensing

J Zhang, Z Tang, M Li, D Fang, P Nurmi… - Proceedings of the 24th …, 2018 - dl.acm.org
We present CrossSense, a novel system for scaling up WiFi sensing to new environments
and larger problems. To reduce the cost of sensing model training data collection …

Device-free WiFi human sensing: From pattern-based to model-based approaches

D Wu, D Zhang, C Xu, H Wang… - IEEE Communications …, 2017 - ieeexplore.ieee.org
Recently, device-free WiFi CSI-based human behavior recognition has attracted a great
amount of interest as it promises to provide a ubiquitous sensing solution by using the …

See-through walls: Motion tracking using variance-based radio tomography networks

J Wilson, N Patwari - IEEE Transactions on Mobile Computing, 2010 - ieeexplore.ieee.org
This paper presents a new method for imaging, localizing, and tracking motion behind walls
in real time. The method takes advantage of the motion-induced variance of received signal …

RF-sensing of activities from non-cooperative subjects in device-free recognition systems using ambient and local signals

S Sigg, M Scholz, S Shi, Y Ji… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
We consider the detection of activities from non-cooperating individuals with features
obtained on the radio frequency channel. Since environmental changes impact the …

SCPL: Indoor device-free multi-subject counting and localization using radio signal strength

C Xu, B Firner, RS Moore, Y Zhang, W Trappe… - Proceedings of the 12th …, 2013 - dl.acm.org
Radio frequency based device-free passive (DfP) localization techniques have shown great
potentials in localizing individual human subjects, without requiring them to carry any radio …

RF sensor networks for device-free localization: Measurements, models, and algorithms

N Patwari, J Wilson - Proceedings of the IEEE, 2010 - ieeexplore.ieee.org
In this paper, we discuss the emerging application of device-free localization (DFL) using
wireless sensor networks, which find people and objects in the environment in which the …

See through walls with COTS RFID system!

L Yang, Q Lin, X Li, T Liu, Y Liu - Proceedings of the 21st annual …, 2015 - dl.acm.org
Through-wall tracking has gained a lot of attentions in civilian applications recently. Many
applications would benefit from such device-free tracking, eg elderly people surveillance …

Wi-COVID: A COVID-19 symptom detection and patient monitoring framework using WiFi

F Li, M Valero, H Shahriar, RA Khan, SI Ahamed - Smart Health, 2021 - Elsevier
Abstract The current SARS-CoV-2, better know as COVID-19, has emerged as a serious
pandemic with life-threatening clinical manifestations and a high mortality rate. One of the …