NDLI: Implementation of indoor positioning algorithms using Android smartphones

Content Provider	IEEE Xplore Digital Library
Author	Pajuelo, P. Perez, M.C. Villadangos, J.M. Garcia, E. Gualda, D. Urena, J. Hernandez, A.
Copyright Year	2015
Description	Author affiliation: Electron. Dept., Univ. of Alcala, Alcalá de Henares, Spain (Pajuelo, P.; Perez, M.C.; Villadangos, J.M.; Garcia, E.; Gualda, D.; Urena, J.; Hernandez, A.)
Abstract	This paper proposes a software android application to compute the absolute position of smartphones or tablets in an indoor Ultrasonic Local Positioning System (U-LPS) based on hyperbolic trilateration. U-LPS can enhance mobile devices indoor positioning allowing sub-meter accuracy results by a suitable encoding of the ultrasonic transmissions. An external hardware device based on an ultrasonic microphone and an acquisition system can digitize the signals coming from the U-LPS and send them to the mobile device. Once in the device, by means of correlation techniques, time difference of arrival (TDOA) can be computed to obtain the device position and offer a wide variety of Location Based Services (LBS) to the user (building navigation, augmented reality...). Nevertheless, the correlation and positioning algorithms imply a high computational load. An Android application is presented to positioning mobile devices. It can be configured in real-time for different encoding schemes and allows to manage the reception of data coming from an external acquisition module and perform the low level (demodulation, correlation and peak detection) and high level (TDOA computation and hyperbolic trilateration) tasks. The proposed algorithms have been validated in an indoor U-LPS.
Starting Page	1
Ending Page	4
File Size	420184
Page Count	4
File Format	PDF
e-ISBN	9781467379298
DOI	10.1109/ETFA.2015.7301621
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-08
Publisher Place	Luxembourg
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Smart phones Correlation Acoustics Androids Humanoid robots Accuracy Android Apps Mobile Indoor Positioning Ultrasonic Local Positioning Systems
Content Type	Text
Resource Type	Article

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