Locata: A New Positioning Technology for High Precision Indoor and Outdoor Positioning

J. Barnes, C. Rizos, J. Wang, D. Small, G. Voigt, N. Gambale

Abstract:	The use of GPS for indoor positioning poses difficult challenges due to very weak signal levels, and accuracies are typically of the order of tens to hundreds of meters at best. To overcome this severe limitation Locata Corporation has invented a new positioning technology called Locata, for precision positioning both indoors and outside. Part of the "Locata technology" consists of a time-synchronized pseudolite transceiver called a LocataLite. A network of LocataLites forms a LocataNet, which transmits GPS-like signals that allow single-point positioning using carrier-phase measurements for a mobile device (a Locata). The SNAP group at UNSW has assisted in the development of a Locata and testing of the new technology. In this paper the prototype "Locata technology" is described, and the results of indoor positioning performance test experiments are presented. The experiments demonstrate proof-of-concept for the "Locata technology" and show that carrier-phase point positioning (without radio modem data-links) is possible with sub-centimeter precision.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	1119 - 1128
Cite this article:	Barnes, J., Rizos, C., Wang, J., Small, D., Voigt, G., Gambale, N., "Locata: A New Positioning Technology for High Precision Indoor and Outdoor Positioning," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 1119-1128.
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