Signal denoising method and device based on DE optimization wavelet parameters

The invention discloses a signal denoising method and device based on DE optimization wavelet parameters. The method comprises the following steps: selecting an initial wavelet basis function, and performing wavelet decomposition on a noisy signal according to an initial decomposition layer number and an initial layering threshold value under each decomposition scale to obtain a detail coefficient under each decomposition scale and an approximation coefficient under the maximum decomposition scale; taking the initial wavelet basis function, the initial decomposition layer number and the initial layering threshold value under each decomposition scale as position parameters of an initial population in a DE algorithm, and obtaining an optimal wavelet basis function, an optimal decomposition layer number and an optimal layering threshold value under each decomposition scale based on the DE algorithm; and according to the optimal wavelet basis function, the optimal decomposition layer number and the optimal layeri