谱估计在GPS坐标时间序列分析中的应用

Application of the spectrum estimation in the analysis of the GPS coordinates time series

谱估计是一类重要的频谱分析方法。通过分析几种谱估计函数,利用仿真信号结果,选择最佳的估计函数。利用选择出的功率谱函数和小波谱函数对GPS坐标时间序列进行了分析,探索了时间序列信号里面存在的周期信息;分析了信号各个方向之间存在的差异;利用小波熵对时间序列信号里面的复杂成分进行了探测。

The power spectrum estimation was an important method for spectrum analysis. By analyzing several spectrum estimation functions and using the result of the simulation,optimal estimation function was selected. GPS coordinate time series was analyzed by using the selected power spectrum function and wavelet spectrum,and the period information of the time series was explored,and the difference between various directions of the signal was analyzed.Complex information hidden in the GPS coordinate time series was probed using the wavelet entropy.