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Deployment, Calibration, and Measurement Factors for Position Errors in 802.11-based Indoor Positioning Systems Export

by: Thomas King, Thomas Haenselmann, Wolfgang Effelsberg

edited by: Jeffrey Hightower, Bernt Schiele, Thomas Strang

In Proceedings of the International Workshop on Location- and Context-Awareness (LoCA), Vol. 4718 (September 2007), pp. 17-34.

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Indoor positioning systems based on 802.11 and fingerprints offer reasonably low position errors. We study the deployment, calibration, and measurement factors for position errors by systematically investigating (1) the number of access points, (2) the number of samples in the training phase, (3) the number of samples in the position determination phase, and (4) the setup of the grid of reference points. Further, we bring out the best of the positioning system by selecting advantageous values for these parameters. For our study, we utilize a test environment with a size of about 312 square meters that is covered with 612 reference points arranged in an equally spaced grid.


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