Feature information identification of non-stationary geodetic signal with wavelet
LI Zun-jian · Journal of Shandong University of Technology · 2009
Wavelet energy spectrum,combining wavelet transform and Fourier transform can be used to record both the abrupt changing time quantum in time and its frequency band in frequency.So it can be used to determine the relevant scales of the main complex processes which offered the basis for analyzing and identifying the feature information.Simulating results showed that the quality of the extracted information was guaranteed and the time and space complexity was reduced by the mentioned method.this method was also successfully applied to identify and extract feature information from annual period item,semi-annual period item and seasonal period item of YATI and WUDI station in Shandong.