Journal of Shanghai Jiaotong University ›› 2014, Vol. 48 ›› Issue (03): 323-327.

• Radiao Electronics, Telecommunication Technology • Previous Articles     Next Articles

A Novel Model for High Dynamic GPS Signal Tracking

ZHAO Wenjun,MAO Xuchu
  

  1. (School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2013-03-03 Online:2014-03-28 Published:2014-03-28

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: