摘要
本文研究了GPS精确授时系统结构以及静态和动态环境下进行精确授时的方法。在静态环境下,利用伪距和载波相位进行授时,我们通过仿真得出了使用这种方法的授时精度。在动态环境下,GPS信号发生失锁现象会导致授时精度大大降低,使用秒脉冲和高精度晶振进行精确授时可以大大提高高动态情况下的授时精度,我们通过仿真分析了使用高精度晶振辅助授时对精度的影响。
The structure of GPS accurate timing system and the accurate timing methods in static and dynamic condition are studied in this paper. In the static condition, the accurate timing is finished by pseudo and carrier phase and we get the related timing precision by simulation. In the dynamic condition, the lost-locked problem of the GPS signal makes low timing accuracy. In order to improve the timing accuracy enormously, the second-impulse and the high-precision crystal oscillator are used. Also by simulation, we analyze the effect on the timing accuracy when using the accessory high-precision crystal oscillator.
出处
《电气电子教学学报》
2007年第4期34-38,共5页
Journal of Electrical and Electronic Education
基金
江苏省高技术研究项目(BG2005001)
江苏省"333高层次人才培养工程"专项资助
关键词
全球定位系统
授时
载波相位
误差分析
global positioning system （GPS）
timing
carrier phase
error analyse
