Talks and Poster Presentations (with Proceedings-Entry):
A. Ettlinger, G. Retscher:
"Positioning Using Ambient Magnetic Fields in Combination with Wi-Fi and RFID";
Talk: 7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016,
Alcalá de Henares (invited);
- 2016-10-06; in: "7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016",
Paper ID 47,
The earth´s magnetic field needs no transmitter infrastructure and can be measured everywhere. Therefore its use in fingerprinting technology for indoor-positioning and navigation seems to be useful. In this work the magnetic field is used in combination with Wi-Fi and RFID in the fingerprinting approach. The idea is to first calculate an approximate solution with Wi-Fi and then refine it with the magnetic field. Additionally RFID can also be used in this approach to further refine the approximate solution from Wi-Fi. To analyze the achievable accuracies static and kinematic test measurements are done. In the static test measurements the positions are calculated by using different sensors (Smartphone and low-cost IMU), different distance criteria and different signal sources. The smallest positioning errors (about 2m) occur by using all signal sources (magnetic field, Wi-Fi, RFID) and the Mahalanobisdistance. At the kinematic test measurements a Kalman Filter is used. A motion model delivers values for the system equation and the observations are retrieved by using magnetic field- and Wi-Fi-Fingerprinting. The kinematic positioning errors do not exceed 6m.
fingerprinting, geomagnetic field, Wi-Fi, RFID, kinematic positioning
Created from the Publication Database of the Vienna University of Technology.