Particle Filter for Reduced Multipath Error Parameters Estimation

A. Indriytamoko, Rosihan, D.H. Won, S. Chun, T. Kang, Y.J. Lee, E. Lee, J.R. Kim, H-S. Jun

Abstract:	This paper describes a multipath estimation method for GPS (Global Positioning System) dual frequency carrier phase measurements. Multipath is a major error source in high precision GPS applications, i.e., carrier phase measurements for precise positioning and attitude determinations. In order to estimate and remove multipath at carrier phase measurements, an array GPS antenna system has been used. The known geometry between the antennas is used to estimate multipath parameters. Dual frequency carrier phase measurements increase the redundancy of measurements, so it can reduce the number of antennas. The particle filter is applied to overcome some of the limitations of the Kalman filter (KF) such as weakness to severe nonlinearity. This paper uses the particle filter for estimating multipath parameters. Series of simulations were performed with GPS antenna arrays located on same straight line with one reflector. The geometry information of the antenna array reduces the number of estimated multipath parameters from four to three. Particle filter and the Kalman filter (KF) are used as estimation algorithms and the results of two filters are compared. When the initial parameters are far from true parameters the particle filter shows a better performance than Kalman filter (KF).
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:	1763 - 1770
Cite this article:	Indriytamoko, A., Rosihan,, Won, D.H., Chun, S., Kang, T., Lee, Y.J., Lee, E., Kim, J.R., Jun, H-S., "Particle Filter for Reduced Multipath Error Parameters Estimation," 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. 1763-1770.
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