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AP-side WLAN Analytics [article]

Peshal Nayak
2021 arXiv   pre-print
Similar to virtual speed test, uScope makes estimations solely based on passive AP-side observations.  ...  This thesis enables passive AP-side network analytics.  ...  solely based on passive AP-side observations.  ... 
arXiv:2105.04524v1 fatcat:2yjhugzbrveoffmuq62m6omje4

OPERAnet: A Multimodal Activity Recognition Dataset Acquired from Radio Frequency and Vision-based Sensors [article]

Mohammud J. Bocus, Wenda Li, Shelly Vishwakarma, Roget Kou, Chong Tang, Karl Woodbridge, Ian Craddock, Ryan McConville, Raul Santos-Rodriguez, Kevin Chetty, Robert Piechocki
2021 arXiv   pre-print
This paper presents a comprehensive dataset intended to evaluate passive Human Activity Recognition (HAR) and localization techniques with measurements obtained from synchronized Radio-Frequency (RF) devices  ...  Furthermore, it can potentially be used to passively track a human in an indoor environment.  ...  Note that in skeleton tracking, Kinect might suffer from occlusion when some parts of the human body are occluded with others and therefore cannot be tracked accurately.  ... 
arXiv:2110.04239v1 fatcat:msm2nzvndzbzxgwpdeahoxw6pu

CentiTrack: Towards Centimeter-Level Passive Gesture Tracking with Commodity WiFi [article]

Zijun Han, Zhaoming Lu, Xiangming Wen, Wei Zheng, Jingbo Zhao, Lingchao Guo
2020 arXiv   pre-print
In this paper, we propose CentiTrack, the first centimeter-level passive gesture tracking system that works with only three commodityWiFi devices, without any extra hardware modifications or wearable sensors  ...  Extensive experiments show that CentiTrack is superior in terms of tracking accuracy, sensing range and device cost, compared with the state-of-the-arts.  ...  As far as we know, there are mainly six WiFi-based passive tracking schemes, i.e., WiTrace [1] , WiDraw [16] , IndoTrack [28] , Dynamic Music [29] , Tracking from One Side [30] and Widar [31] ,  ... 
arXiv:2011.06896v1 fatcat:t2rf4ymgsfaozh2curgx7s2o3u

Recent Advances and Challenges in Ubiquitous Sensing [article]

Stephan Sigg and Kai Kunze and Xiaoming Fu
2015 arXiv   pre-print
Through sensing paradigms that parasitically utilise stimuli from the noise of environmental, third-party pre-installed systems, sensing leaves the boundaries of the personal domain.  ...  Ubiquitous sensing is tightly coupled with activity recognition. This survey reviews recent advances in Ubiquitous sensing and looks ahead on promising future directions.  ...  They were able to distinguish a vacant area from the area with a person standing and a person moving.  ... 
arXiv:1503.04973v1 fatcat:hqebr5ttirfsra6srqyxyo36b4

Multi-Person Passive WiFi Indoor Localization with Intelligent Reflecting Surface [article]

Ganlin Zhang, Dongheng Zhang, Ying He, Jinbo Chen, Fang Zhou, Yan Chen
2022 arXiv   pre-print
In the multi-person scenario, we propose a Side-lobe Cancellation Algorithm to eliminate the near-far effect to achieve accurate localization of multiple persons in an iterative manner.  ...  The past years have witnessed increasing research interest in achieving passive human localization with commodity WiFi devices.  ...  Fig. 1 : 1 Fig. 1: An illustration of the multi-person passive localization system with IRS.  ... 
arXiv:2201.01463v2 fatcat:tq7k75gusfae7aa4dffixu2y6i

A review on radio based activity recognition

Shuangquan Wang, Gang Zhou
2015 Digital Communications and Networks  
Traditional activity recognition methods often rely on physical sensors (camera, accelerometer, gyroscope, etc.) to continuously collect sensor readings, and utilize pattern recognition algorithms to identify  ...  In this paper, we divide radio based methods into four categories: ZigBee radio based activity recognition, WiFi radio based activity recognition, RFID radio based activity recognition, and other radio  ...  Different from antenna array based tracking method that captures the target from spatially spaced antennae (as shown in Fig. 5(a) ), ISAR takes one measurement at a time and uses consecutive measurements  ... 
doi:10.1016/j.dcan.2015.02.006 fatcat:ky5xhkcyjrbshoc7yq6zh63hdy

Constrained Localization: A Survey

Trifun Savic, Xavier Vilajosana, Thomas Watteyne
2022 IEEE Access  
A good body of publications emerged, with several survey papers that provide a deep analysis of the research advances.  ...  The article is both a survey on recent academic research and a hands-on evaluation of commercial solutions.  ...  However, the accuracy of the RF-based systems can vary from 10 cm up to 100 m, mostly depending on the different RF-based technology they use. a close contact with a contagious person [51] .  ... 
doi:10.1109/access.2022.3171859 fatcat:b2jwl5xqyvczllswayqpjjv5ey

Raspberry Pi as an Inexpensive Platform for Real-Time Traffic Jam Analysis on the Road

Robert Baumgartl, Dirk Mueller
2018 Proceedings of the 2018 Federated Conference on Computer Science and Information Systems  
One thing we're paying a lot with is the loss of our privacy.  ...  Additionally we show by experimental data how this tracking can be used for traffic jam analysis on roads.  ...  The ratio between passing cars and unique MAC addresses varies from 16 % to 50 % (both extrema were observed at the side of the road) with an average of 32 %.  ... 
doi:10.15439/2018f290 dblp:conf/fedcsis/BaumgartlM18 fatcat:e47ddl37fnc6bohj7g6dbrbvyq

Wi-COVID: A COVID-19 Symptom Detection and Patient Monitoring Framework using WiFi

Fangyu Li, Maria Valero, Hossain Shahriar, Rumi Ahmed Khan, Sheikh Iqbal Ahamed
2020 Smart Health  
and monitor diagnosed COVID-19 patients from their homes.  ...  Using the at-home WiFi signals, we propose Wi-COVID, a non-invasive and non-wearable technology to monitor the patient and track RR for the healthcare provider.  ...  First, we discuss different approaches for WiFi monitoring in Section 2. Then, we introduce the proposed Wi-COVID framework in Section 3.  ... 
doi:10.1016/j.smhl.2020.100147 pmid:33251320 pmcid:PMC7680085 fatcat:asgyrbkve5endpxm52z5ye5l4m

Track and Trace for Optimal Process Control of Energy Flows within a Building

Wim Zeiler, Timi Labeodan, Gert Boxem, Rik Maaijen, Joep van der Velden, Jan-Willem Dubbeldam
2014 Procedia Environmental Sciences  
Initial results from the implementation of one of these technologies in an office building are presented as well as the framework for the use of a more intelligent multi-agent based building energy and  ...  Within this project the departments the Built Environment and Electrical Engineering of the University of Technology Eindhoven cooperate with Kropman Building Services and Sense.  ...  Acknowledgement This project was financial supported by the Province Noord Brabant within the KIC InnoEnergy program, project PCRL; Development of a micro Grid strategy for Process Control on Room Level  ... 
doi:10.1016/j.proenv.2014.11.023 fatcat:ze3flvh6ung3nfd2brrusucd2y

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  
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  ...  This paper reviews state-of-the-art research on collecting and analysing channel state information, extracted using ubiquitous WiFi signals, describing a range of healthcare applications and identifying  ...  Furthermore, they developed another structure for multi-persons' pose estimation [48] .  ... 
doi:10.1109/rbme.2022.3156810 pmid:35254990 fatcat:oxwsifpznrac7h3ix35tvbdp2q

Radio Sensing Using 5G Signals: Concepts, State-of-the-art and Challenges

Yunfei Chen, Jie Zhang, Wei Feng, Mohamed-Slim Alouini
2021 IEEE Internet of Things Journal  
Unlike conventional sensing, radio sensing uses existing radio signals or devices to passively sense the ambient environment for low cost and wide deployment.  ...  After that, several open challenges in 5G radio sensing are illustrated with relevant insights. These insights manifest that 5G radio sensing has great potentials to explore.  ...  The authors studied three methods: WiFi passive sensing with 16 industrial standard wireless nodes, fast beam-steering and passive sensing using 100 GHz.  ... 
doi:10.1109/jiot.2021.3132494 fatcat:ds6jcng6ozgqtkcuvhnhvqe2oq

Exploring LoRa for Long-range Through-wall Sensing

Fusang Zhang, Zhaoxin Chang, Kai Niu, Jie Xiong, Beihong Jin, Qin Lv, Daqing Zhang
2020 Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies  
For instance, WiFi and RFID can achieve 3-6 meter sensing range while acoustic-based sensing is limited to less than one meter.  ...  displacement and direction) can be tracked accurately even when the target is 30 meters away from the LoRa transceiver pair.  ...  Among all the commodity device based solutions, such as WiFi, RFID, and Zigbee, WiFi based passive human sensing is the most popular one and has found many interesting applications, ranging from localization  ... 
doi:10.1145/3397326 fatcat:xsvxcxr4rvfrbdqiq25d33agaq

The State-of-the-Art Sensing Techniques in Human Activity Recognition: A Survey

Sizhen Bian, Mengxi Liu, Bo Zhou, Paul Lukowicz
2022 Sensors  
Finally, we summarized the presented sensing techniques with a comparison concerning selected performance metrics and proposed a few outlooks on the future sensing techniques used for HAR tasks.  ...  techniques, resulting in weak focus on HAR-related sensing techniques.  ...  On the other hand, passive sensing does not need an active wave source and perceives the object variables by receiving a measured wave signal from the object.  ... 
doi:10.3390/s22124596 pmid:35746376 pmcid:PMC9229953 fatcat:2cjpolwafnem7o4mehxigaqojq

Survey of CSI Fingerprinting-based indoor positioning and mobility tracking systems

Josyl Rocamora, Ivan Wang-Hei Ho, Man Wai Mak, Alan Lau
2020 IET Signal Processing  
Range-based methods rely on geometric mappings to approximate a location given the calculated distances or angles from multiple reference points.  ...  CSI has the potential to achieve cm-level positioning accuracy with a single reference point only.  ...  MU is equipped with a communication interface and is aware of the positioning. If a person is being tracked using active IPS, the person must be carrying an electronic device.  ... 
doi:10.1049/iet-spr.2020.0028 fatcat:7gn7mhmxqvaxxcsgyjwbeqougi
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