A New Wavelet-Based Multipath Mitigation Technique

Mohamed Elhabiby, Ahmed El-Ghazouly, Naser El-Sheimy

Abstract:	It is well known that multipath disturbance is one of the major error sources impacting high precision GPS positioning. Even though most of the other error sources have been dealt with by modeling or using special practical techniques, multipath disturbance is still the limiting factor of all precise differential carrier-phase applications. Mitigation in the measurements domain is the result of the large size of residuals from the mitigation in GPS antenna and receiver levels. Wavelet decomposition techniques proved to be a powerful tool in mitigation at that domain as introduced by various researchers. Previous research on the use of wavelet decomposition techniques mainly focused on using wavelet as a de-noising tool (high frequency removal). This paper presents a new trend extraction technique for multipath mitigation in carrier phase measurements domain using wavelet multi-resolution analysis. Systematic errors (mainly multipath) are isolated and extracted from GPS measurements in double difference domain using wavelet multi-resolution analysis by the application of new trend detection methodology. In this new technique, wavelet transform decomposition is applied to the double difference GPS residuals of static baseline solutions in L1 frequency and/or L2 frequency. Because the largest errors are caused by low frequency multipath, wavelet transform approach is used to separate the multipath e
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	625 - 631
Cite this article:	Elhabiby, Mohamed, El-Ghazouly, Ahmed, El-Sheimy, Naser, "A New Wavelet-Based Multipath Mitigation Technique," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 625-631.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In