Seismic Signal Wavelet-Packet Denoising and Fast Spectrum Analysis
Noise mixed in the recorded seismic signals often affects the data analysis result. To solve this problem, wavelet packet decomposition technology is selected to reduce the noise. The principle, denoising steps and algorithm of wavelet packet decomposition technology are introduced with its effectiveness and reliability verified by computer simulation. Meanwhile, split-radix FFT algorithm is used to rapidly perform spectral analysis for seismic signals. Compared with radix-2 FFT and radix-4 FFT, split-radix algorithm can significantly reduce calculation amount and improve the speed of data analysis. Field tests showed that wavelet packet denoising technology and split-radix FFT algorithm have good effect.
S. C. Liu et al., "Seismic Signal Wavelet-Packet Denoising and Fast Spectrum Analysis", Applied Mechanics and Materials, Vols. 229-231, pp. 1772-1776, 2012