On Hilbert Huang Transform and its Application to GNSS Signal Multipath Characterization

A. Hirrle, E. Engler

Abstract:	The multipath propagation error is one of the limiting factors for systems which require high accuracy, continuity and integrity. Thus lots of research activities have already been done to estimate and mitigate this error source. At the data processing level, for example, Double Differences and Linear Combinations of Code and Carrier Phase have been calculated and analysed statistically and by means of Wavelets. First results show that especially the idea of using time-frequency-analysis seems to be an auspicious approach to characterize and estimate the multipath component on code as well as on phase measurements. This paper has two main aims. First it will introduce in the basics of a data-driven method called Hilbert Huang Transform which has been published in 1998 [1]. It overcomes the disadvantages of Wavelet Analysis as for example the assumption of signal’s linearity and predefined scales and has already been successfully applied in various research areas (e.g. neurobiology, climatology and seismology). The second aim of this paper is the investigation of code and carrier phase multipath propagation errors and their characterization by the proposed method.
Published in:	Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010) September 21 - 24, 2010 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	217 - 223
Cite this article:	Hirrle, A., Engler, E., "On Hilbert Huang Transform and its Application to GNSS Signal Multipath Characterization," Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010), Portland, OR, September 2010, pp. 217-223.
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