Multipath Elimination for the Low-Cost Consumer GPS

Philip G. Mattos

Abstract:	Early GPS receivers used three correlation points in each chmel to control the tracking. The spacing was conventionally 1 microsecond, maximising the gain of the error function. Today, professional and survey versions use sophisticated means of reducing multipath, such as the narrow correlator approach (Novatel) or the multipath estimating/eliminating methods (Novatel Delft). Some consumer models have used multiple correlators on a single satellite to achieve a rapid acquisition time(JRC), rather than for multipath elimination. The third option is that of minimal cost, for consumer applications in private cars. The next generation requires all three parameters . . that is fast acquisition time, for use in cities, precision, to allow map-matching, even in the down-town multipath environment, and extremely low cost. The low-cost, fast acquisition technology has been presented elsewhere (Mattos, ION-GPS95). This paper concentmtes on the code tracking technology to achieve freedom from multipath distortion by algorithm only.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	665 - 671
Cite this article:	Mattos, Philip G., "Multipath Elimination for the Low-Cost Consumer GPS," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 665-671.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In