APPLICATION OF WAVELET TRANSFORM IN PROCESSING NATURE ELECTROMAGNETIC FIELD TIME SERIES
Jianxin Liu · Geology and Prospecting · 2008
Owing to progress and development of modern civilization,impulse-like noise seriously affects steady estimation of impedance response parameter in the electromagnetic exploration.It is the first task of data processing to remove noise interference.Traditional frequency domain method has powerless because of impulse character of noise.Using features of energy focusing and maximum characteristic of module in the wavelet domain,method removing impulse-like noise with linearity prediction and searching locality of singularity point in the time-frequency domain has got great effects.Processing results of practice data also show that the method is reliable.