Position Determination Using Hybrid GPS/Cellphone Ranging

N.F. Krasner, G. Marshall and W. Riley

Abstract:	By combining timing, or ranging, information from cellular transmissions and GPS transmissions, a receiver can greatly improve the availability of position determinations and in some cases the accuracy. This paper describes the concepts behind such hybrid- positioning systems and presents and analyzes some field measurements. In particular, the paper focuses upon improvements upon availability due to the use of wireless assisted GPS and hybrid GPS/cellular ranging systems. Hybrid positioning is the basis of the built-in location capability of a number of new cellphone products from Qualcomm and is supported by several of the cellphone positioning standards.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	165 - 176
Cite this article:	Krasner, N.F., Marshall, G., Riley, W., "Position Determination Using Hybrid GPS/Cellphone Ranging," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 165-176.
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