Investigation of practical and theoretical accuracy of wireless indoor positioning system Ubisense

Marek Woźniak, Waldemar Odziemczyk, Kamil Nagórski


This paper presents the accuracy investigation results and functionality of Ubisense RTLS positioning system. Three kinds of studies were conducted: test of calibration accuracy, analysis of theoretical accuracy of the coordinates determination as well as accuracy measurements in field conditions. Test of calibration accuracy was made with several different geometric constellation of reference points (tag positions). We determined changes of orientation parameters of receivers and disturbance of positioning points coordinates against chosen reference points constellations. Analysis of theoretical accuracy was made for several receivers spatial positions and their orientations. It allowed to indicate favourable and unfavourable measurement area considering accuracy and reliability. Real positioning accuracy of the Ubisense system was determined by comparison with coordinates measured using precise tacheometer TCRP1201+. Results of conducted experiments and accuracy analysis of test measurement were presented in figures and diagrams.


positioning systems; RTLS; point tracking

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Coyle, L., Juan, Y., Loureiro, E., Knox, S., Dobson, S. & Nixon, P. (2007). A Proposed Approach to Evaluate the Accuracy of Tag-based Location Systems, Ubiquitous Systems Evaluation (USE 2007). Workshop at UbiComp2007, pp. 292-296, 2007

Curran, K., Furey, E., Lunney, T., Santos, J., Woods, D. & Mc Caughey, A. (2011). An Evaluation of Indoor Location Determination Technologies, Journal of LocationBased Service Volume 5, Issue 2, 2011

Gremigni, O. & Porcino, D. (2006). UWB ranging performance tests in different radio environments, London Communications Symposium 2006

Stephan, P., Heck, I., Kraus, P. & Frey, G. (2009). Evaluation of Indoor Positioning Technologies under industrial application conditions in the SmartFactory based on EN ISO 9283, Preprints of the 13th IFAC Symposium on Information ControlProblems in Manufacturing, Moscow Russia June 3 - 5, 2009

Liu, H., Darabi, H., Banerjee, P. & Liu, J. (2007). Survey of Wireless Indoor Positioning Techniques and Systems, Systems, Man, and Cybernetics, Part C: Applications and Reviews, IEEE Transactions, vol. 37, issue: 6, November 2007

Mandeljc, R., Perš, J., Kristan, M. & Kovačič, S. (2010). An Alternative Way to Calibrate Ubisense Real-Time Location System via Multi-Camera Calibration Methods. Proceedings of the 19th International Electrotechnical and ComputerScience Conference, ERK 2010, pp. 249-252

Muthukrishnan K. & Hazas, M. (2009). Position Estimation from UWB Pseudorange and Angle-of-Arrival: A Comparison of Non-linear Regression and Kalman Filtering, Proc., 4th Int. Symp. on Location and Context Awareness, Springer, pp. 222-239

Ubisense (2008-2009). LocationEngineConfig User Manual

Ward, A., Webster, P. & Batty, P. (2003). Local Positioning Systems - technology overview and applications, Ubisense White Paper, September 2003

Zhang, Y., Partridge, K. & Reich, J. (2007). Localizing Tags Using Mobile Infrastructure, Location- and Context-Awareness, Lecture Notes in ComputerScience Volume 4718, pp. 279-296



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