A Simple and Economic Algorithm For Ambiguity Resolution OTF Using a Whitening Filter

A.H. Mohamed

Abstract:	In this paper, a whitening filter technique using ldl (Lower Diagonal Lower) and udu (Upper Diagonal Upper) factorizations is used to provide a simple carrier phase ambiguity resolution OTF technique. The technique proved to be very efficient for short baselines over short observation periods. It also performed well in instantaneously recovering ambiguities after loss of lock. The ability to function without a search algorithm combined with the simplicity of its implementation make the whitening filter a powerful tool to resolve GPS carrier phase ambiguity on the fly. The whitening filter can also be used with algorithms that use a search technique by applying the whitening filter technique right before the search to make the search more efficient. A MATLAB® implementation of the algorithm is given in the appendix.
Published in:	Proceedings of the 54th Annual Meeting of The Institute of Navigation (1998) June 1 - 3, 1998 The Adams Mark Hotel Denver, CO
Pages:	477 - 486
Cite this article:	Mohamed, A.H., "A Simple and Economic Algorithm For Ambiguity Resolution OTF Using a Whitening Filter," Proceedings of the 54th Annual Meeting of The Institute of Navigation (1998), Denver, CO, June 1998, pp. 477-486.
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