Self-adaptive signal decomposition method

The invention discloses a self-adaptive signal decomposition method, and relates to the technical field of signal processing methods and is used for noise reduction and decomposition of multi-component complex signals. The method comprises the following steps of converting an input signal into a frequency domain, initializing each variable in the frequency domain; carrying out circulated updatingon each component, and the center frequency, bandwidth parameters and Lagrangian coefficient of each component according to an updating formula, increasing k in unit step size, until the sum of all the components obtained by updating and the mutual entropy of the input signals is smaller than a threshold value, stopping the inner circulation; repeating the above steps until an error limit requirement is met; and finally realizing automatic determination of the number K of the components and the bandwidth parameters, wherein the obtained components are all effective components, and the sum of all the components is an i