GPS多路径效应中的EEMD时空滤波器

EEMD filtering technology in GPS multipath effect

根据结构动态监测中GPS多路径效应的日重复性和低频周期等特性,本文研究了一种基于集成经验模态分解(EEMD)技术的滤波方法,构造了EEMD时空滤波器。通过计算连续两天GPS动态监测数据EEMD的相关系数,提取GPS监测数据中的多路径效应。实验结果表明了该方法的有效性,为结构动态变形模态分析提供了有效数据。

The method based on the Ensemble Empirical Mode Decomposition （EEMD） technique for filtering was studied in this paper, according to the day repeatability and low frequency to GPS multipath effects for structural dynamic monitoring. Fourier trans- form spectral characteristics for intrinsic mode function （IMF） from EEMD was studied to estabilish a new spatio-temporal filter. Then the correlation coefficient of two consecutive days of GPS dynamic monitoring data of EEMD results was studied to extract GPS mu｜tipath effects. The experimental results showed that this method could effectively provide efficient data for further dynamic modal analysis on structural deformation.