小波在GPS相对定位中周跳探测的仿真分析

Simulation and analysis of detection of cycle-slips in GPS relative positioning by using the wavelet technology

周跳的探测和修复是GPS相对定位数据处理过程中的一个重要组成部分,修复周跳首先要探测周跳。根据小波变换对信号奇异性检测的原理,对GPS相对定位中载波相位差分观测值进行周跳的探测,并结合实验数据进行计算机仿真分析。证明小波技术探测载波相位差分观测值中的周跳效果明显,其自动化程度较高、定位准确,在实际应用中具有很好的实用价值。

The detection and repair of cycle-slips are important parts in processing GPS data. According to the principle of signal oddity detection by wavelet transform, wavelet transform is used to detect the cycle-slip of the GPS carrier phase differential observations in GPS relative positioning. The com- puter simulation results demonstrate that the effect of the method is very obvious. The degree of au- tomatization is higher and the position is more exact with the presented method than with the routine methods. The method of wavelet detection is practical for application.