Filters








15,623 Hits in 5.3 sec

Robust Indoor Localization on a Commercial Smart Phone

Nisarg Kothari, Balajee Kannan, Evan D. Glasgwow, M. Bernardine Dias
2012 Procedia Computer Science  
In this paper, we introduce a methodology for indoor localization using a commercial smart-phone combining dead reckoning and Wifi signal strength fingerprinting.  ...  Low-cost localization solutions for indoor environments have a variety of real-world applications ranging from emergency evacuation to mobility aids for people with disabilities.  ...  We present a methodology that combines dead reckoning (DR) and Wifi signal strength strategies towards robust indoor GPS-free localization using commercial mobile phones.  ... 
doi:10.1016/j.procs.2012.06.158 fatcat:2afsuqrarvbjrmv6dnyju2gcwm

Calibration-Free Signal-Strength Localization Using Product-Moment Correlation

Wouter A. P. Van Kleunen, Le Viet-Duc, Paul J. M. Havinga
2016 2016 IEEE 13th International Conference on Mobile Ad Hoc and Sensor Systems (MASS)  
Localization, a process of determining the position of a blind node, can be used in various applications. Signal-strength localization provides a low-cost and lowpower solution to positioning.  ...  Signal-strength positioning approaches using fingerprinting or calibrated approaches require a time-consuming calibration phase.  ...  Signal-strength localization provides a low-cost solution that can be applied on many different radio platforms.  ... 
doi:10.1109/mass.2016.035 dblp:conf/mass/KleunenLH16 fatcat:kvu3r6uqavbo5lwn24dgnmypse

Robust WLAN Device-free Passive motion detection

Ahmed E. Kosba, Ahmed Saeed, Moustafa Youssef
2012 2012 IEEE Wireless Communications and Networking Conference (WCNC)  
WLAN Device-free Passive (DfP) localization is an emerging technology that uses the widely deployed WiFi networks for detecting and localizing human presence within indoor environments.  ...  This technique constructs profiles capturing the signal strength characteristics when no human is present within the area of interest and uses these profiles to identify any anomalies in the signal strength  ...  ACKNOWLEDGMENT This work is supported in part by a grant from the Egyptian Science and Technology Development Fund (STDF).  ... 
doi:10.1109/wcnc.2012.6214375 dblp:conf/wcnc/KosbaSY12 fatcat:wrvpsr5g4rbqvcx7sszcnlrngy

The Tale of Two Localization Technologies

Ahmed Shokry, Moustafa Elhamshary, Moustafa Youssef
2017 Proceedings of the 25th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems - SIGSPATIAL'17  
However, these beacon-based solutions are limited to a small subset of high-end phones. In this paper, we present HybridLoc: an accurate low-overhead indoor localization system.  ...  WiFi fingerprinting is one of the mainstream technologies for indoor localization. However, it requires an initial calibration phase during which the fingerprint database is built manually.  ...  point for a certain amount of time to construct the signal strength histogram.  ... 
doi:10.1145/3139958.3139989 dblp:conf/gis/ShokryEY17 fatcat:ozw75f573fhjhaoihare65pklu

Weight-RSS: A Calibration-Free and Robust Method for WLAN-Based Indoor Positioning

Zengwei Zheng, Yuanyi Chen, Tao He, Fei Li, Dan Chen
2015 International Journal of Distributed Sensor Networks  
Wi-Fi fingerprinting has become a promising solution for indoor positioning with the rapid deployment of WLAN and the growing popularity of mobile devices.  ...  Experiment results indicate that our method can solve the RSS variance problem without any manual calibration.  ...  Acknowledgment This work has been supported by Hangzhou Key Laboratory for IoT Technology & Application.  ... 
doi:10.1155/2015/573582 fatcat:ryuvfy77ffg2bfhdphgepvixsi

Review of Indoor Positioning: Radio Wave Technology

Tan Kim Geok, Khaing Zar Aung, Moe Sandar Aung, Min Thu Soe, Azlan Abdaziz, Chia Pao Liew, Ferdous Hossain, Chih P. Tso, Wong Hin Yong
2020 Applied Sciences  
presented for distance estimation in localization systems.  ...  This paper presents a comprehensive review on the positioning algorithms for indoors, based on advances reported in radio wave, infrared, visible light, sound, and magnetic field technologies.  ...  The proximity method has a high variance which sometimes might not satisfy the need for localization.  ... 
doi:10.3390/app11010279 fatcat:le6p5l7gebftndyiirslmgdx5a

Noise Adaptive Optimization Scheme for Robust Radio Tomographic Imaging Based on Sparse Bayesian Learning

Kaide Huang, Zhiyong Yang
2020 IEEE Access  
INDEX TERMS Device-free localization, radio tomographic imaging, robust signal reconstruction, sparse Bayesian learning, mixture of Gaussians.  ...  Experimental results in the context of device-free localization show that the proposed scheme can effectively reduce mislocalization and improve localization accuracy in the rich multipath environments  ...  Finally, we evaluate the device-free localization results based on the reconstructed images. A.  ... 
doi:10.1109/access.2020.3005048 fatcat:fksbkrukrbhonjystabrix7ogi

ACE: An Accurate and Efficient Multi-Entity Device-Free WLAN Localization System

Ibrahim Sabek, Moustafa Youssef, Athanasios V. Vasilakos
2015 IEEE Transactions on Mobile Computing  
Device-free (DF) localization in WLANs has been introduced as a value-added service that allows tracking of indoor entities that do not carry any devices.  ...  We design an efficient energy-minimization function that can be mapped to a binary graph-cut problem whose solution has a linear complexity on average and a third order polynomial in the worst case.  ...  Likelihood for signal strength The term U SS (M t , s t ) is the log-likelihood of the received signal strength.  ... 
doi:10.1109/tmc.2014.2320265 fatcat:qkt5qi3l4bbedkuatwuigzu6nq

Improving Wi-Fi based indoor positioning using Particle Filter based on signal strength

Md. Sabbir Rahman Sakib, Md Abdul Quyum, Karl Andersson, Kare Synnes, Ulf Korner
2014 2014 IEEE Ninth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP)  
Wi-Fi received signal strength (RSS) fluctuations over time introduce incorrect positioning. To minimize the fluctuation of RSS, we developed Particle Filters with the prototype.  ...  Moreover comparison between calibration data in all directions and in one direction while constructing a radio map is presented.  ...  Average fingerprint of received signal strength from different APs can bring a little improvement of accuracy but it cannot contribute to handle the fluctuation of received signal strength during the on-line  ... 
doi:10.1109/issnip.2014.6827597 dblp:conf/issnip/SakibQASK14 fatcat:kpxhr6tn55hlzbxubvyi72lhsq

Indoor Positioning with Radio Location Fingerprinting [article]

Mikkel Baun Kjærgaard
2010 arXiv   pre-print
Positioning using location fingerprinting requires the measurement of, for instance, signal strength for nearby base stations.  ...  In particular the aim is to advance location fingerprinting techniques for the challenges of handling heterogeneous clients, scalability to many clients, and interference between communication and positioning  ...  Carsten Valdemar Munk helped collecting signal strength measurements and implementing the facilities for collecting these.  ... 
arXiv:1004.4759v1 fatcat:eeu7yx4qpbfi5bcftpq5ckqgyi

Passive RFID tomographic imaging for device-free user localization

Benjamin Wagner, Neal Patwari, Dirk Timmermann
2012 2012 9th Workshop on Positioning, Navigation and Communication  
Instead, they are tracked using the changes in signal strength measured on static links in a wireless network. This work presents a new algorithm for RF DFL using passive RFID networks.  ...  In RF device-free localization (DFL), the person being tracked does not need to wear a RF transmitter or receiver in order to be located.  ...  ACKNOWLEDGEMENT We would like to thank Yang Zhao, Joey Wilson and Dominik Lieckfeldt for their helpful support and comments. Also we want to thank Martin Kittel for his supporting experimental work.  ... 
doi:10.1109/wpnc.2012.6268750 dblp:conf/wpnc/WagnerPT12 fatcat:ugxdrvg23zfcvi5y2mlzi5jt7i

A survey of mathematical methods for indoor localization

Fernando Seco, Antonio R. Jimenez, Carlos Prieto, Javier Roa, Katerina Koutsou
2009 2009 IEEE International Symposium on Intelligent Signal Processing  
This document provides a survey of the mathematical methods currently used for position estimation in indoor local positioning systems (LPS), particularly those based on radiofrequency signals.  ...  Comments on the applicability, requirements, and immunity to nonline-of-sight (NLOS) propagation of the signals of each method are provided.  ...  The GP approximation has the advantage of being able to handle the nonlinear functional dependency of signal strength and position using relatively simple mathematics, and give sensible estimates for p  ... 
doi:10.1109/wisp.2009.5286582 fatcat:znxifnsdmncilc63py4fuo2duq

Spot: An accurate and efficient multi-entity device-free WLAN localization system [article]

Ibrahim Sabek, Moustafa Youssef
2012 arXiv   pre-print
Device-free (DF) localization in WLANs has been introduced as a value-added service that allows tracking indoor entities that do not carry any devices.  ...  A novel cross-calibration technique is introduced to reduce the calibration overhead of multiple entities to linear, regardless of the number of humans being tracked.  ...  Likelihood for signal strength The term U SS (M t , s t ) is the log likelihood of the received signal strength.  ... 
arXiv:1207.4265v1 fatcat:lfkglndpjraafgnm77hqjmvhni

Probability-Based Location Aware Design and On-Demand Robotic Intrusion Detection System

Chia-How Lin, Kai-Tai Song
2014 IEEE Transactions on Systems, Man & Cybernetics. Systems  
With this approach, the inconsistencies often seen in received signal strength indicator (RSSI) measurements are handled with a minimum of calibration.  ...  By taking off-line calibration measurement of a ZigBee sensor network, the inherent problem of signal uncertainty of to-be-localized nodes can be effectively resolved.  ...  The technique known as ring overlapping based on comparison of received signal strength indication (ROCRSSI) is a commonly used range-free approach [9] to localization.  ... 
doi:10.1109/tsmc.2013.2277691 fatcat:mlbmludeqrhvzirxzllixd7ox4

A REVIEW OF TECHNIQUES FOR POSITIONING IN WLAN WITH LIMITED DATA

Vitaly Romanov, Giancarlo Succi
2018 Figshare  
Thus, methods that require fewer reference signals for positioning are needed. This paper provides the comparison of WLAN based positioning methods that can operate with a single AP.  ...  However, if we consider WiFi data for the task of crowd analysis, the data should be collected on the side of the network provider and, in this case, it is usually scarce.  ...  This method introduces a calibration-free approach to local area positioning.  ... 
doi:10.6084/m9.figshare.6979211.v1 fatcat:o73oeiulwja7bkimlaxwfdl77e
« Previous Showing results 1 — 15 out of 15,623 results