小波包分析在GPS振动观测中的应用

将小波包分析应用于GPS振动观测数据处理,研究小波包分析在异常值探测、信号特征提取、去噪中的应用。首先对信号分解和单支重构,验证小波包分析探测异常值的能力。针对小波包分析含有丰富的高频信息,采用奇异谱分析方法提取高频部分的振幅和频率。小波包分析的去噪能力优于小波分析。

Application of wavelet packet analysis to GPS vibration monitoring

This paper applies wavelet packet analysis to the GPS observation data processing, and studies the application of the wavelet packet analysis to detecting abnormal observations, signal feature extraction and the denoising.Firstly, by means of splitting and refactoring the signal, the ability of the wavelet packet analysis on detect outliers is verified.Then in view of the abundant high frequency informationthe that wavelet packet analysis contains, this paper extracts the amplitude and frequency of the high frequency part by using the method of singular spectrum analysis.At the same time, this paper also finds that wavelet packet analysis is better than wavelet analysis in terms of the denoising ability.