摘要
GPS信号跟踪过程是GPS接收机的核心组成部分,它是将捕获阶段得到的各项参数进行精确估计的过程,实现本地生成信号与输入信号的准确同步。以高动态环境为前提,模拟生成GPS信号,改变卫星信号的加加速度,模拟高动态下所引起的多普勒频移,分别使用传统跟踪环路与扩展卡尔曼滤波环路对信号进行跟踪。仿真结果显示,扩展卡尔曼滤波跟踪环路更加稳定,精度有所提高。
The GPS signal tracking process is the core component of the GPS receiver. It is the process of accurately estimating the parameters obtained in the capture phase. It realizes the accurate synchronization of the local generated signal and the input signal. Based on the premise of high dynamic environment,this paper simulates the generation of GPS signals,changes the acceleration of satellite signals,simulates the Doppler shift caused by high dynamic motion,and uses the traditional tracking loop and the extended Kalman filter loop tracking signal respectively. The simulation results show that the extended Kalman filter tracking loop is more stable and the accuracy is improved.
出处
《微型机与应用》
2017年第18期66-69,72,共5页
Microcomputer & Its Applications
关键词
高动态
GPS信号跟踪
卡尔曼滤波
high dynamic
GPS signal tracking
extended Kalman filter
