1. C/A CODE MULTIPATH MITIGATION AT GPS BASE STATIONS FOR IMPROVED DGPS CORRECTIONS USING WAVELETS
- Author
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T. L. Dammalage, Clement Ogaja, S. Kibe, and Chalermchon Satirapod
- Subjects
Multipath mitigation ,Precision Lightweight GPS Receiver ,business.industry ,Real-time computing ,GPS disciplined oscillator ,Base station ,Geography ,Assisted GPS ,Earth and Planetary Sciences (miscellaneous) ,Global Positioning System ,Computers in Earth Sciences ,Differential GPS ,business ,Multipath propagation ,Civil and Structural Engineering - Abstract
Differential GPS (DGPS) correction technique is one of the most popular and accurate techniques to enhance GPS positioning accuracies by minimizing most of the common mode errors as a collective process. Several DGPS processing techniques can be used, for instance, single differencing and double differencing which are very common in practice. Irrespective of the DGPS processing techniques used, the ultimate accuracy of the user location depends on the existence of non-common mode (site-dependent) errors, which occur at the points of observation and the reference. Of these errors, the most common site-dependent error is the multipath. Several researchers have proposed different strategies and approaches to minimize the multipath effect on the final GPS position estimates. This manauscript evaluates the potential of applying wavelets transform to C/A code multipath mitigation at GPS reference stations, for improved differential GPS corrections.An experiment was conducted making C/A code DGPS observa...
- Published
- 2010