A Variable Gain Adaptive Kalman Filter-Based GPS Carrier Tracking Algorithm for Ionosphere Scintillation Signals

L. Zhang, Y.T. Morton, Miami University; M.M. Miller

Abstract:	This paper analyzes GPS receiver carrier tracking loop performance limitations when working with GPS signals affected by ionosphere scintillation. The concepts of ‘dynamic limit’ and ‘noise limit’ on the tracking loop filter bandwidth are introduced to facilitate the analysis. Three adaptive bandwidth Kalman filter-based carrier phase lock loops (PLLs) are proposed to improve carriertracking performance under GPS signal scintillation conditions. All three methods use the real time estimated C/N0 values as a control parameter to adaptively vary the filter bandwidth and improve tracking performance. Real GPS signals affected by strong scintillations collected at Ascension Island during the last solar maximum period is used to illustrate the performance of the three methods.
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:	3107 - 3114
Cite this article:	Zhang, L., Morton, Y.T., Miller, Miami University; M.M., "A Variable Gain Adaptive Kalman Filter-Based GPS Carrier Tracking Algorithm for Ionosphere Scintillation Signals," Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010), Portland, OR, September 2010, pp. 3107-3114.
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