上海交通大学学报(自然版) ›› 2014, Vol. 48 ›› Issue (03): 323-327.

• 无线电电子学、电信技术 • 上一篇    下一篇

一种用于高动态全球定位系统信号跟踪的新模型

赵文骏,茅旭初   

  1. (上海交通大学 电子信息与电气工程学院,上海 200240)
  • 收稿日期:2013-03-03 出版日期:2014-03-28 发布日期:2014-03-28
  • 基金资助:

    国家自然科学基金(40674002),上海航天科技创新基金(D202)资助项目

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

摘要:

针对传统全球定位系统(GPS)信号跟踪方法在高动态环境下跟踪精度不够理想且容易失锁等缺陷,提出了一种新的跟踪模型.采用包含多普勒频移与码相位误差的二维观测相关器组,并通过基于列文伯格-马夸尔特方法优化的迭代扩展卡尔曼滤波算法,使跟踪环路在码相位与载波频率初始捕获误差较大的情况下,依然能够快速而准确地收敛,成功解调出导航信息.仿真结果显示,利用新的GPS信号跟踪模型能够高质量地完成加速度为150g的高动态GPS信号跟踪.
 

 

关键词: 全球定位系统, 高动态跟踪, 迭代扩展卡尔曼滤波, 列文伯格-马夸尔特方法

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

中图分类号: