Seismic exploration signal random noise suppression method based on extrusion short-time Fourier transform
A short-time Fourier transform and random noise technology, which is applied in the field of geophysics exploration, can solve the problems of low calculation efficiency, large filtering influence, and unfocused signals, and achieve the goals of improving flexibility, less damage, and increasing time-frequency concentration Effect
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[0048] The present invention provides a method for suppressing random noise of seismic exploration signals by squeezing short-time Fourier transform, performing short-time Fourier transform on each signal in a high-dimensional seismic data volume, and then performing short-time Fourier transform on signals greater than the set threshold 1 Squeeze the short-time Fourier transform coefficients to obtain the squeezed short-time Fourier transform coefficients, and then use the position and size of the adjacent channel squeezed short-time Fourier transform coefficients as constraints to squeeze the short-time Fourier transform coefficients for the current channel The coefficients of the Fourier transform are subjected to threshold processing, and finally the processed short-time Fourier transform coefficients are reconstructed to obtain a signal after suppressing random noise, which provides basic data with a high signal-to-noise ratio for subsequent seismic data processing. Compare...
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