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Wireless Health Monitoring using Passive WiFi Sensing [article]

U. M. Khan, Z. Kabir, S. A. Hassan
2017 arXiv   pre-print
This paper presents a two-dimensional phase extraction system using passive WiFi sensing to monitor three basic elderly care activities including breathing rate, essential tremor and falls.  ...  The results indicate that passive WiFi systems show great promise in replacing typical invasive health devices as standard tools for health care.  ...  To the best of the authors' knowledge, this is the first comprehensive study on elderly-focused health care applications using passive WiFi sensing.  ... 
arXiv:1704.00620v1 fatcat:qnqufarc6bgepd2yhxpst2lmpu

Exploiting WiFi Channel State Information for Residential Healthcare Informatics [article]

Bo Tan, Qingchao Chen, Kevin Chetty, Karl Woodbridge, Wenda Li, Robert Piechocki
2017 arXiv   pre-print
This is, in part, due to the pervasive nature of WiFi in residential settings such as homes and care facilities, and unobtrusive nature of WiFi based sensing.  ...  Advanced signal processing techniques can accurately extract WiFi channel status information (CSI) using commercial off-the-shelf (COTS) devices or bespoke hardware.  ...  His research focuses on RF sensors and signal processing techniques that exploit wireless communications for passive sensing and behaviour classification using micro-Doppler signatures.  ... 
arXiv:1712.03401v1 fatcat:bfgcwmeycfhnhfmjnsemdhewdu

Sensorless sensing with WiFi

Zimu Zhou, Chenshu Wu, Zheng Yang, Yunhao Liu
2015 Tsinghua Science and Technology  
Can WiFi signals be used for sensing purpose? The growing PHY layer capabilities of WiFi has made it possible to reuse WiFi signals for both communication and sensing.  ...  Yet the concept of wireless and sensorless sensing is not the simple combination of WiFi and radar.  ...  Pioneer researchers have termed this largely unexplored field as Wireless Sensing, Sensorless Sensing or Radio Tomography Imaging [3] , and we will use wireless sensing and sensorless sensing throughout  ... 
doi:10.1109/tst.2015.7040509 fatcat:gtiqpnqxdzdtfj6xw2hkpjpklu

UWB and WiFi Systems as Passive Opportunistic Activity Sensing Radars

Mohammud J. Bocus, Kevin Chetty, Robert J. Piechocki
2021 2021 IEEE Radar Conference (RadarConf21)  
In this paper, we use Ultra-Wideband (UWB) and commodity WiFi systems for the passive sensing of human activities.  ...  Human Activity Recognition (HAR) is becoming increasingly important in smart homes and healthcare applications such as assisted-living and remote health monitoring.  ...  Activity sensing can provide insightful information related to pattern-of-life and can be used to monitor a patient's health in terms of inactivity or falls.  ... 
doi:10.1109/radarconf2147009.2021.9455175 fatcat:qxs4kiznkrag3mocsr2eq6ylde

Exploiting WiFi Channel State Information for Residential Healthcare Informatics

Bo Tan, Qingchao Chen, Kevin Chetty, Karl Woodbridge, Wenda Li, Robert Piechocki
2018 IEEE Communications Magazine  
This is, in part, due to the pervasive nature of WiFi in residential settings such as homes and care facilities, and unobtrusive nature of WiFi based sensing.  ...  Advanced signal processing techniques can accurately extract WiFi channel status information (CSI) using commercial off-the-shelf (COTS) devices or bespoke hardware.  ...  Challenges in Residential Health Monitoring 1) Vital Signs: Vital signs such as respiration and the heart beat are the amongst the most useful indicators of a person's general health.  ... 
doi:10.1109/mcom.2018.1700064 fatcat:fvxsaa2zvfgvrdsk2a4fsfr7kq

A Review on Wireless Fidelity Co-Location Technology Adopted Indoors for Technology-Based Contact Tracing

Agburu Adikpe, Matthew Iyobhebhe, Caleb Amlabu, Ishaya Botson, Bankole Omojola, James Bashayi, Chukwudi Ezugwu
2022 Jordan journal of electrical engineering  
This review focuses on wireless fidelity (WiFi) as a co-location technology adopted for TCT.  ...  To achieve this, technology-based contact tracing (TCT) has been adopted as one of the systems used to mitigate the spread of the outbreak.  ...  Considering the WiFi interventions proposed as TCT solutions (most of which ubiquitously use the WiFi data obtained through passive WiFi sensing), it is crucial to consider that not all UEs connected to  ... 
doi:10.5455/jjee.204-1635982606 fatcat:qpzw26hsanhdtci7js3n5wo26q

Contactless WiFi Sensing and Monitoring for Future Healthcare - Emerging Trends, Challenges and Opportunities

Yao Ge, Ahmad Taha, S.A Shah, Kia Dashtipour, Shuyuan Zhu, Jonathan M. Cooper, Qammer Abbasi, Muhammad Imran
2022 IEEE Reviews in Biomedical Engineering  
WiFi sensing has recently received significant interest from academics, industry, healthcare professionals and other caregivers (including family members) as a potential mechanism to monitor our aging  ...  The interest in such WiFi-based sensing systems stems from its practical deployments in indoor settings and compliance from monitored persons, unlike other sensors such as wearables, camera-based, and  ...  wireless sensing based on WiFi signals.  ... 
doi:10.1109/rbme.2022.3156810 pmid:35254990 fatcat:oxwsifpznrac7h3ix35tvbdp2q

A high-speed, real-time mobile gait rehabilitation system

Wenlong Zhang, Yi-Hung Wei, Quan Leng, Song Han
2014 XRDS Crossroads The ACM Magazine for Students  
Combining advanced technologies in real-time wireless communication, control theory, sensor and actuator design, and rehabilitation science.  ...  One is on body sensor networks, which are used for health monitoring and disease diagnosis.  ...  Control applications rely on predict- assistive device into a body sensor and actuator network using the RT-WiFi protocol; and building a big health data platform to store, manage, and process the unstructured  ... 
doi:10.1145/2590728 fatcat:mnpgx6sh3rdyrf7utqcpfayqpy

A Perspective on Passive Human Sensing with Bluetooth

Giancarlo Iannizzotto, Miryam Milici, Andrea Nucita, Lucia Lo Bello
2022 Sensors  
Passive human sensing approaches based on the analysis of the radio signals emitted by the most common wireless communication technologies have been steadily gaining momentum during the last decade.  ...  However, the introduction of the Bluetooth direction finding feature and the application of Artificial Intelligence techniques to the processing and analysis of the wireless signal for passive human sensing  ...  .), and it is often used for personal health monitoring [12] [13] [14] .  ... 
doi:10.3390/s22093523 pmid:35591213 pmcid:PMC9100767 fatcat:wglfdmawc5gchl4wieqoif4bvq

Using RF Transmissions from IoT Devices for Occupancy Detection and Activity Recognition

Wenda Li, Shelly Vishwakarma, Chong Tang, Karl Woodbridge, R. J. Piechocki, Kevin Chetty
2021 IEEE Sensors Journal  
In this paper, we present Passive IoT Radar (PIoTR), a system that passively uses RF transmissions from IoT devices for human monitoring.  ...  PIoTR is designed based on passive radar technology, with a generic architecture to utilize various signal sources including the WiFi signal and wireless energy at the Industrial, Scientific and Medical  ...  Passive Radar System PR systems, with different mechanisms as CSI systems, have also been widely used for short-range RF sensing.  ... 
doi:10.1109/jsen.2021.3134895 fatcat:g5isdyg6qrf4zogv4as6uwd6p4

Physical Activity Sensing via Stand-Alone WiFi Device

Wenda Li, Robert. J. Piechocki, Karl Woodbridge, Kevin Chetty
2019 2019 IEEE Global Communications Conference (GLOBECOM)  
Traditionally, WiFi-based sensing uses the Channel State Information (CSI) from an offthe-shelf WiFi Access Point (AP) which transmits signals that have high pulse repetition frequencies.  ...  Surprisingly WiFi based sensing under these conditions have received little attention given that WiFi APs are frequently in idle state.  ...  Additionally, wireless signals cannot be used to generate images the people they are monitoring which alleviates many concerns and barriers around privacy issues.  ... 
doi:10.1109/globecom38437.2019.9013750 dblp:conf/globecom/LiPWC19 fatcat:mdt3j3ct3bad5owqrwwebzz3xq

Urban WiFi characterization via mobile crowdsensing

Arsham Farshad, Mahesh K. Marina, Francisco Garcia
2014 2014 IEEE Network Operations and Management Symposium (NOMS)  
As an application of the mobile crowdsensing based urban WiFi monitoring, we outline a cloud based WiFi router configuration service for better interference management with global awareness in urban areas  ...  They show that few channels in 2.4GHz are heavily used; in contrast, there is hardly any activity in the 5GHz band even though relatively it has a greater number of available channels.  ...  Not surprisingly then, mobile phone sensing applications have been realized or envisioned in diverse domains (e.g., transportation, social networking, health monitoring) [1] , [2] .  ... 
doi:10.1109/noms.2014.6838233 dblp:conf/noms/FarshadMG14 fatcat:l5xgmli7mjhjvcomdbqvqkbece

Backscatter Communications: Inception of the Battery-Free Era—A Comprehensive Survey

Mudasar Memon, Navrati Saxena, Abhishek Roy, Dong Shin
2019 Electronics  
The problem of limited battery power motivates us to utilize radio frequency (RF) signals as the energy source for battery-free communications in next-generation wireless networks.  ...  Ambient BackCom (Amb-BackCom) is a type of BackCom that can harvest energy from nearby WiFi, TV, and cellular RF signals to modulate information.  ...  RF signals Backscattered Signals Vehicle Monitoring by BackCom National Aeronautics and Space Administration (NASA) aims to use passive WSN for a vehicle health monitoring system (VHMS) that can ensure  ... 
doi:10.3390/electronics8020129 fatcat:m7vootfm5fh77omdwjcbj5alvq

A Deep Learning Framework using Passive WiFi Sensing for Respiration Monitoring [article]

U. M. Khan, Z. Kabir, S. A. Hassan, S. H. Ahmed
2017 arXiv   pre-print
This paper presents an end-to-end deep learning framework using passive WiFi sensing to classify and estimate human respiration activity.  ...  A passive radar test-bed is used with two channels where the first channel provides the reference WiFi signal, whereas the other channel provides a surveillance signal that contains reflections from the  ...  Specifically, this research introduces a vital health wireless device and makes the following contributions: • Proposes a deep learning framework for classifying various activities using passive WiFi sensing  ... 
arXiv:1704.05708v1 fatcat:6owynzhx7rbv5l5pabtefhagce

Analyzing the Impact of Covid-19 Control Policies on Campus Occupancy and Mobility via Passive WiFi Sensing [article]

Camellia Zakaria, Amee Trivedi, Emmanuel Cecchet, Michael Chee, Prashant Shenoy, Rajesh Balan
2021 arXiv   pre-print
This paper conjectures that analyzing user occupancy and mobility via deployed WiFi infrastructure can help institutions monitor and maintain safety compliance according to the public health guidelines  ...  Using smartphones as a proxy for user location, our analysis demonstrates how coarse-grained WiFi data can sufficiently reflect indoor occupancy spectrum when different COVID-19 policies were enacted.  ...  Data-driven analytics utilizing passive WiFi-sensing is a promising technique, and we have since developed an open-source monitoring tool at (redacted link) for public use.  ... 
arXiv:2005.12050v4 fatcat:htu3zndn2baplja75gapqhpxlm
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