COMPASS: A Probabilistic Indoor Positioning System Based on 802.11 and Digital Compasses Export

@inproceedings{king:compass, abstract = {Positioning systems are one of the key elements required by location-based services. This paper presents the design, implementation and analysis of a positioning system called COMPASS which is based on 802.11-compliant network infrastructure and digital compasses. On the mobile device, COMPASS samples the signal strength values of different access points in its communication range and utilizes the orientation of the user to preselect a subset of the training data. The remaining training data is used by a probabilistic positioning algorithm to determine the position of the user. While prior systems show limited accuracy due to blocking effects caused by the human body, we apply digital compasses to detect the orientations of the users so that we can deal with these blocking effects. After a short period of training our COMPASS system achieves an average error distance of less than 1.65 meters in our experimental environment of 312 square meters.}, address = {Los Angeles, CA, USA}, author = {King, T. and Kopf, S. and Haenselmann, T. and Lubberger, C. and Effelsberg, W.}, booktitle = {Proceedings of the First ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization (WiNTECH)}, citeulike-article-id = {2820683}, citeulike-linkout-0 = {http://www.informatik.uni-mannheim.de/pi4/publications/King2006g.pdf}, keywords = {crawdad, mannheim\_compass, measurement, wireless}, month = {September}, posted-at = {2008-05-21 17:27:04}, priority = {2}, title = {COMPASS: A Probabilistic Indoor Positioning System Based on 802.11 and Digital Compasses}, url = {http://www.informatik.uni-mannheim.de/pi4/publications/King2006g.pdf}, year = {2006} }

TY - CONF ID - king:compass L3 - citeulike-article-id:2820683 N2 - Positioning systems are one of the key elements required by location-based services. This paper presents the design, implementation and analysis of a positioning system called COMPASS which is based on 802.11-compliant network infrastructure and digital compasses. On the mobile device, COMPASS samples the signal strength values of different access points in its communication range and utilizes the orientation of the user to preselect a subset of the training data. The remaining training data is used by a probabilistic positioning algorithm to determine the position of the user. While prior systems show limited accuracy due to blocking effects caused by the human body, we apply digital compasses to detect the orientations of the users so that we can deal with these blocking effects. After a short period of training our COMPASS system achieves an average error distance of less than 1.65 meters in our experimental environment of 312 square meters. AD - Los Angeles, CA, USA TI - COMPASS: A Probabilistic Indoor Positioning System Based on 802.11 and Digital Compasses T2 - Proceedings of the First ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization (WiNTECH) KW - crawdad KW - mannheim_compass KW - measurement KW - wireless AU - King, T AU - Kopf, S AU - Haenselmann, T AU - Lubberger, C AU - Effelsberg, W PY - 2006/September// UR - http://www.informatik.uni-mannheim.de/pi4/publications/King2006g.pdf ER -