Filters








4,715 Hits in 4.5 sec

Calibration-free fusion of step counter and wireless fingerprints for indoor localization

Suining He, S.-H. Gary Chan, Lei Yu, Ning Liu
2015 Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing - UbiComp '15  
We propose SLAC, a fingerprint positioning framework which simultaneously localizes the target and calibrates the system.  ...  In order to improve the accuracy of fingerprint-based localization, one may fuse step counter measurement with location estimation.  ...  PFL and MLL do not consider simultaneous localization and calibration. Therefore, if the measured Wi-Fi signals get no pre-calibration, their performance degrades significantly.  ... 
doi:10.1145/2750858.2804254 dblp:conf/huc/HeCYL15 fatcat:nj3ip56rjzcn3hcmud4jy3ud6y

Small UAVs-supported Autonomous Generation of Fine-grained 3D Indoor Radio Environmental Maps [article]

Ken Mendes, Filip Lemic, Jeroen Famaey
2021 arXiv   pre-print
In the demonstration, we instantiate the system design using two UAVs and show its capability of visiting 72 waypoints and gathering thousands of Wi-Fi data samples.  ...  Our results also include an instantiation of the ML system for predicting the Received Signal Strength (RSS) of known Wi-Fi Access Points (APs) at locations not visited by the UAVs.  ...  ACKNOWLEDGMENTS Filip Lemic was supported by the EU Marie Curie project "Scalable Localization-enabled In-body Terahertz Nanonetwork" (nr. 893760).  ... 
arXiv:2111.03451v1 fatcat:hiqgmbsoxrh2vnloqccl5djhz4

Indoor Localiza tion

Paramvir Bahl
2015 GetMobile Mobile Computing and Communications  
Wi-Fi RSSI probabilistic model  1 m (Horus) Youssef et al [7] Wi-Fi RSSI calibration free 5.4 m (TIX) Gwon et al [6] Wi-Fi RSSI crowdsourcing 1.2 m (Zee) Rai et al [10] Wi-Fi RSSI configuration  ...  Wi-Fi is everywhere, so if we can get the software right, Wi-Fi based indoor localization should be everywhere as well.  ... 
doi:10.1145/2786984.2786993 fatcat:445qz5jo7ze6llh7teaukg5diy

Calibration-Free Positioning Technique Using Wi-Fi and Built-in Sensors of Mobile Devices [article]

Jeongsik Choi, Yang-Seok Choi
2020 arXiv   pre-print
This paper studies a calibration-free positioning technique using Wi-Fi ranging and pedestrian dead reckoning (PDR), where every parameter in the system is optimized in real-time.  ...  Additionally, this paper studies an efficient way of performing irregular Wi-Fi ranging procedures to improve battery life and network performance of mobile devices.  ...  Self-Calibration of Wi-Fi Ranging Module As Wi-Fi ranging procedures are executed multiple times during the operation of the positioning application, the amount of training data for optimizing ranging  ... 
arXiv:2003.06013v1 fatcat:lpt5hihebrastck6oeixtvoltu

HYFI: Hybrid Floor Identification Based on Wireless Fingerprinting and Barometric Pressure

Fang Zhao, Haiyong Luo, Xuqiang Zhao, Zhibo Pang, Hyuncheol Park
2017 IEEE Transactions on Industrial Informatics  
Identifying different floors in multistory buildings is a very important task for precise indoor localization in industrial and commercial applications.  ...  The floor information obtained from wireless AP distribution is then used to initialize and calibrate barometric pressure-based floor identification to compensate variable environmental effects.  ...  We used five Wi-Fi-enabled smartphones (Samsung Galaxy Note2/Note3/S4/S5/Ace S5830) to collect floor fingerprints.  ... 
doi:10.1109/tii.2015.2491264 fatcat:zlaid4s6rnfuzbz3e3vbtk5uwi

A smartphone-based multimodal indoor tracking system

Miguel Martínez del Horno, Luis Orozco-Barbosa, Ismael García-Varea
2021 Information Fusion  
Our proposal consists of a simple calibration phase of the tracking system, which involves enabling simultaneous data gathering from all three sensors and the Wi-Fi interface.  ...  Taking the Wi-Fi signal model as baseline, four different configurations are evaluated by incrementally adding and integrating the models of the other three sensors.  ...  Wi-Fi model In one of our previous works [24] , we proposed a Wi-Fi-based indoor tracking systems calibration procedure able to properly describe the Wi-Fi signal propagation within an indoor environment  ... 
doi:10.1016/j.inffus.2021.05.001 fatcat:5tuyste4yjabzgbokxztv6cl5m

A Self-Adaptive Model-Based Wi-Fi Indoor Localization Method

Jure Tuta, Matjaz Juric
2016 Sensors  
Our method is self-calibrating and self-adaptive thus maintenance free and based on Wi-Fi only.  ...  Our self-calibrating procedure utilizes one propagation model to infer parameters of the space and the other to simulate the propagation of the signal without requiring any additional hardware beside Wi-Fi  ...  It implements a continuous self-calibrating and self-adapting procedure insuring the adaption to the changes in Wi-Fi signal space.  ... 
doi:10.3390/s16122074 pmid:27929453 pmcid:PMC5191055 fatcat:4ac6quwjcfgibg2hqdbmvvbcsq

Real Time Location based Tracking using WIFI Signals

Atul Gosai, Rushi Raval
2014 International Journal of Computer Applications  
Moreover the WI-FI technology can also be used in forest area for tracking animals. WI-FI signals are much useful in places where the wired connections are not possible to set up.  ...  Despite of the use of WI-FI signals in location tracking, they are also used in tracking Bar Code stickers.  ...  Normally, Wi-Fi network range is about 75-150 ft. Many mobile devices today are well equipped with Wi-Fi to enable them to connect to the internet easily.  ... 
doi:10.5120/17684-8542 fatcat:5ugwaan6jzagpm3p5xy3aevmfq

OLS

Martin Klepal, Maarten Weyn, Warsun Najib, Inge Bylemans, Sigit Wibowo, Widyawan Widyawan, Bimo Hantono
2009 Proceedings of the 1st ACM workshop on Networking, systems, and applications for mobile handhelds - MobiHeld '09  
In this paper, we describe the opportunistic localization, which enables localization services that works seamlessly in heterogeneous environments including indoors as oppose to GPS based outdoor-only  ...  The latest version of OLS strives to reduce the system ownership cost by adopting a patent covered self-calibration mechanism minimising the system installation and maintenance cost.  ...  Implemented localisation methods and technologies are following: − Wi-Fi is a well established technology nowadays and OLS benefits from the omnipresence of Wi-Fi networks and advanced RSSI based fusion  ... 
doi:10.1145/1592606.1592630 dblp:conf/sigcomm/KlepalWNBWWH09 fatcat:4wl7rc4g2nfbdkrevix5fifkre

Privacy-Preserving Positioning in Wi-Fi Fine Timing Measurement

Domien Schepers, Aanjhan Ranganathan
2022 Proceedings on Privacy Enhancing Technologies  
With the standardization of Wi-Fi Fine Timing Measurement (Wi-Fi FTM; IEEE 802.11mc), the IEEE introduced indoor positioning for Wi-Fi networks.  ...  To date, Wi-Fi FTM is the most widely supported Wi-Fi distance measurement and positioning system.  ...  Furthermore, Wi-Fi Aware [2] , a Wi-Fi Alliance standard that enables proximal Wi-Fi devices to quickly discover, connect, and exchange information without the need for any infrastructure uses Wi-Fi FTM  ... 
doi:10.2478/popets-2022-0048 fatcat:7lu3fotup5ftzcwh3f5omrtm4a

Acoustic Self-Calibrating System for Indoor Smart Phone Tracking

Alexander Ens, Fabian Höflinger, Johannes Wendeberg, Joachim Hoppe, Rui Zhang, Amir Bannoura, Leonhard M. Reindl, Christian Schindelhauer
2015 International Journal of Navigation and Observation  
The receivers are connected in a Wi-Fi network, such that they synchronize their clocks and exchange the time differences of arrival (TDoA) of the received chirps.  ...  The precise time measuring of sound enables high precision localization in indoor areas.  ...  Liu et al. improved the Wi-Fi localization accuracy with an acoustic ranging [21] .  ... 
doi:10.1155/2015/694695 fatcat:o7z4dwina5grxmlxotgpgyt5fq

ViNav: A Vision-based Indoor Navigation System for Smartphones

Jiang Dong, Marius Noreikis, YU XIAO, Antti Yla-Jaaski
2018 IEEE Transactions on Mobile Computing  
The calibrated information is utilized for building more informative and accurate indoor maps, and lowering the response delay of localization requests.  ...  ViNav implements image-based localization that identifies users' positions and facing directions, and leverages this feature to calibrate dead-reckoning-based user trajectories and sensor fingerprints  ...  It enables fast localization by taking advantage of the high hit-rate and low response delay of Wi-Fi fingerprinting.  ... 
doi:10.1109/tmc.2018.2857772 fatcat:asbs43z5rnawrm24jmmflbnniq

Global industrial process monitoring using raspberry pi controller

Sayali Gajanan Desai, B. T. Salokhe, A. S. Mali
2017 International Journal of Current Advanced Research  
Wi-Fi Module for PIC side ModuleESP8266 ESP8266 Wi-Fi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your Wi-Fi network.  ...  The Wi-Fi Alliance, the organization that owns the Wi-Fi registered trademark term specifically defines Wi-Fi as any "wireless local area network (WLAN) products that are based on the Institute of Electrical  ... 
doi:10.24327/ijcar.2017.3627.0333 fatcat:dhtxivcldbbh3k5mcjn6pizp2m

Wi-Fi Fingerprint-Based Indoor Positioning: Recent Advances and Comparisons

Suining He, S.-H. Gary Chan
2016 IEEE Communications Surveys and Tutorials  
This survey overviews recent advances on two major areas of Wi-Fi fingerprint localization: advanced localization techniques and efficient system deployment.  ...  Among them, Wi-Fi (802.11) emerges as a promising one due to the pervasive deployment of wireless LANs (WLANs).  ...  and adaptation: In contrast to offline methods, online calibration and adaptation schemes focus on utilizing only target Wi-Fi data (online measurement) for self-calibrating and adapting to the heterogeneous  ... 
doi:10.1109/comst.2015.2464084 fatcat:vgqxvxzrl5ddte7xi4x4rnd5oa

A Precise Tracking Algorithm Using PDR and Wi-Fi/iBeacon Corrections for Smartphones

Tuan D. Vy, Thu L. N. Nguyen, Yoan Shin
2021 IEEE Access  
Considering smartphone-based indoor localization and tracking, combination of Wi-Fi fingerprinting and pedestrian dead reckoning (PDR) becomes prevalent due to wide deployment of indoor Wi-Fi access points  ...  INDEX TERMS smartphone based indoor localization; pedestrian dead reckoning; iBeacon placement methodology; Wi-Fi proximity I. INTRODUCTION  ...  measurements of detectable Wi-Fi APs and iBeacons for self-localization.  ... 
doi:10.1109/access.2021.3069261 fatcat:eeabouqa75dftbrh5yryxitrya
« Previous Showing results 1 — 15 out of 4,715 results