Multipath Mitigation Using Particle Filtering

P. Closas, C. Fernández-Prades, J.A. Fernández-Rubio, A. Ramírez-González

Abstract:	In direct–sequence spread–spectrum (DS–SS) based navigation systems, multipath can degrade seriously synchronization performance causing time delay and code phase estimates to deviate from the actual value. This bias depends on the relative amplitudes and delays of multipath replicas with respect to the direct signal. The error in the estimated position due to multipath, when using a standard Delay Lock Loop, can be on the order of several tens of meters, which is a critical aspect in high–precision applications. This works presents a Sequential Monte Carlo based algorithm which tries to iteratively estimate complex amplitudes and delays of the direct signal and multipath replicas by characterizing the posterior probability density function of these parameters relying on particle filter theory.
Published in:	Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006) September 26 - 29, 2006 Fort Worth Convention Center Fort Worth, TX
Pages:	1733 - 1740
Cite this article:	Closas, P., Fernández-Prades, C., Fernández-Rubio, J.A., Ramírez-González, A., "Multipath Mitigation Using Particle Filtering," Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006), Fort Worth, TX, September 2006, pp. 1733-1740.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In