顾及信号相关关系的GPS坐标监测序列噪声分析

摘要

时间序列分析、谱分析和小波分析理论是对信号进行时、频域分析的主要方法,对GPS坐标监测序列研究并分析其噪声序列发现,GPS坐标监测序列中的噪声主要包含白噪声和闪烁噪声,但是大多数噪声分析方法未考虑信号之间的相关关系.针对GPS站坐标监测序列,在分析2维坐标信号之间相关性的基础上,采用多变量小波去噪工具实现坐标监测序列的2维去噪,对得到的2维噪声序列进行谱分析,并与传统l维去噪方法比较.以苏通大桥GPS坐标监测序列为实例进行分析,结果表明:顾及信号间相关关系的GPS坐标监测序列的噪声分析更加符合实际情况.%Time series analysis,spectral analysis and wavelet analysis theory are the main methods to analyze signals in time and frequency domain,there are mainly white noise and flicker noise in the GPS coordinates monitoring series through studying the GPS coordinates monitoring series and analyzing the noise series.However,most of the noise analysis method does not consider the correlation between the signals.For GPS station coordinates monitoring series,using multivariate wavelet deposing tools to realize the coordinates monitoring series' two-dimensional deposing based on the correlation between the coordinates signals.Analyze the two-dimensional noise series with spectral analysis method and compare the results with traditional one-dimensional deposing method.Take the GPS coordinates monitoring series of Su Tong Bridge as an example for analyzing and the result shows that the noise analysis of GPS coordinates monitoring series taking into account the correlation between the signals is more in line with the actual situation.