@inproceedings{ipin2018magneticfield,
title = {Magnetic field as a characterization of wide and narrow spaces in a real challenging scenario using Dynamic Time Warping},
author = {Antoni Perez-Navarro and Raul Montoliu and Joaquín Torres-Sospedra and Jordi Conesa},
isbn = {978-1-5386-5635-8/18},
year = {2018},
date = {2018-01-01},
booktitle = {Proceedings of the Ninth International Conference on Indoor Positioning and Indoor Navigation (IPIN)},
pages = {1-8},
publisher = {IEEE},
abstract = {This paper presents a study of indoor positioning in public zones of the Parc Taul´ı Hospital in Sabadell. It is a challenging scenario because: 1) it combines wide spaces with middle sized and narrow spaces; 2) it is a shielded zone where no signals are available, and therefore, noWiFi signal can be used for positioning; and 3) it is not possible to deploy beacons for positioning. The goal of this work is to test
whether it is possible to get indoor positioning in a real and challenging scenario by using only the magnetic field. The positioning precision requires to locate the part of the hospital where the user is. The proposed solution defines “virtual corridors” to improve positioning in wide areas. To validate the work, magnetic field data have been recorded from the scenario, using different smartphones and by different persons. The obtained magnetic data curves have been compared by using dynamic time warping distance. Results show that it is possible to characterize every path with the magnetic field. The main contributions of the present paper are: 1) defining “virtual corridors” as a way to position using magnetic field in 2D spaces; and 2) showing that even in wide spaces, like the hall of a hospital, it is possible to find magnetic anomalies linked to positions.},
keywords = {Indoor positioning, Magnetic field},
pubstate = {published},
tppubtype = {inproceedings}
}

@inproceedings{MontoliuColas2016,
title = {Magnetic Field based Indoor Positioning Using the Bag of Words Paradigm},
author = { Raúl Montoliu-Colás and Joaquín Torres-Sospedra and Óscar Belmonte-Fernández},
year = {2016},
date = {2016-01-01},
booktitle = {Proceedings of the Seventh International Conference on Indoor Positioning and Indoor Navigation IPIN 2016, University of Alcala, Alcalá de Henares (Madrid), Spain October 4-7, 2016},
pages = {in press},
keywords = {Indoor positioning, Magnetic field},
pubstate = {published},
tppubtype = {inproceedings}
}