A Novel Model for High Dynamic GPS Signal Tracking

Abstract

Abstract:

A novel tracking model was proposed for high dynamic condition under which the traditional GPS signal tracking method has a high probability of losing lock as well as a low accuracy. The output from a large number of correlators with wide ranges of uncertainty in code phase and carrier phase were used. An optimized iterated extended Kalman filter algorithm based on the Levenberg-Marquardt method was also implemented to process the output from the correlators, despite large acquisition errors. The simulation results show that the new model performs well in tracking a high dynamic GPS signal with an acceleration of 150 g.

Key words: global positioning system (GPS), highdynamiccondition tracking, iterated extended Kalman filter (IEKF), Levenberg-Marquardt method

CLC Number:

TN 976.1

ZHAO Wenjun,MAO Xuchu. A Novel Model for High Dynamic GPS Signal Tracking[J]. Journal of Shanghai Jiaotong University, 2014, 48(03): 323-327.

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