A New Algorithm to Reduce AGPS Acquisition TTFF

H.A. El Natour, M. Monnerat, A-C. Escher, C. Macabiau, and M-L. Boucheret

Abstract:	The dramatic increase of Location Based Services and other location and navigation applications gives rise to a crucial need to improve positioning solutions. Currently, the American GPS is the only operational satellite based positioning system as the European Galileo system will be operational by 2010. This paper only deals with GPS receivers. The Time To First Fix (TTFF) and the sensitivity are the key drivers for their performance evaluation. The TTFF is the time needed for a GPS receiver to provide a first position. The sensitivity is the ability of a GPS receiver to acquire weak signals. For commercial solutions, an efficient receiver is one with reduced TTFF and high sensitivity. But generally, enhancing the sensitivity results in an increased TTFF and vice versa. In this paper, we propose a new algorithm for GPS acquisition which essentially deals with the TTFF.
Published in:	Proceedings of the 2006 National Technical Meeting of The Institute of Navigation January 18 - 20, 2006 Hyatt Regency Hotel Monterey, CA
Pages:	301 - 311
Cite this article:	Natour, H.A. El, Monnerat, M., Escher, A-C., Macabiau, C., Boucheret, M-L., "A New Algorithm to Reduce AGPS Acquisition TTFF," Proceedings of the 2006 National Technical Meeting of The Institute of Navigation, Monterey, CA, January 2006, pp. 301-311.
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