Research And Simulation Of Seismic Signal De-noising Ways Based On The Wavelet Transform

The wavelet transform attributables to the mathematical field of harmonic function areas, it's a breakthrough progress, and in many areas of science and technology has been widely used. The wavelet transform - scale analysis method has the characteristics of multi-resolution, which in the time and frequency domain have a good localized nature, it can be carried out on any frequency components fine description of a "mathematical microscope," said. Therefore, in the past 20 years wavelet analysis theory and practical application have been booming development. This study aims to explore wavelet transform theory, and the combination of professional study of seismic signal de-noising.Papers to wavelet transform at the core, first of all, on paper the purpose of the study, the significance and major research content, which leads to the wavelet transform theory, and its principles expounded in detail. This includes not only the continuous wavelet, wavelet, multire solution analysis methods include traditional Fourier transform contrast, in theory, clear the superiority of its performance characteristics. Noise in the signal, on the basis of characteristics, in particular the noise characteristics of the seismic signal is given wavelet de-noising diagram of the process. The signal de-noising decomposition in the process of remodeling on the theoretical method, and application of simulation matlab given concrete examples.In the processing of the signal de-noising, were aimed at the random noise, single-frequency interference done a study. And made several different ways of handling, the paper finally selected through comparative study of wavelet de-noising threshold method. This combination of a given signal processing applications matlab, and by comparing the results of this paper to the back of the appropriate handling of the selected parameters. From doing example, wavelet thresholding to deal with a very good de-noising effect. Papers matlab simulated seismic signal applications, including sub-wave, a total shot gathers a total of CMP gathers, as well as analog seismic profiles. Wavelet de-noising threshold with this method several seismic signal processing. In this paper gives several of the original analog signal, the signal plus noise and the effects of treatment plans, as can be seen from Fig, wavelet de-noising threshold completed seismic signal de-noising analog processing.