Adaptive Techniques for GPS System Enhancement

Cynthia Junqueira, Moisés V. Ribeiro and João Marcos T. Romano

Abstract:	This work aims to apply adaptive array techniques as a countermeasure device to improve the performance of Global Positioning System (GPS) in presence of multipath transmission and other interference signals. In fact, spatial processing techniques has not been rather exploited in GPS applications. In this sense, this work intends to open some new perspectives with the proposition of two alternative techniques to mitigate multipath interference. Two classes of solutions are proposed: the first one is based on the joint utilization of a direction-of-arrival (DOA) estimation technique together with a constrained adaptive algorithm. The other approach consists in using a self-adaptive CM (constant modulus) technique, which avoids the need of a pilot signal and a DOA estimator.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	2477 - 2484
Cite this article:	Junqueira, Cynthia, Ribeiro, Moisés V., Romano, João Marcos T., "Adaptive Techniques for GPS System Enhancement," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 2477-2484.
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