Multi-component chirp signal parameter estimation method based on fractional order Fourier domain filtering

The invention relates to a multi-component chirp signal parameter estimation method based on fractional order Fourier domain filtering. The method comprises the steps of: establishing a parameter template library of chirp signals according to pre-obtained external radiation source direct waves, and then when an echo signal is received, determining an observation frame length according to the template pulse width of each chirp signal component, performing matching in the parameter template library to obtain a real-time pulse width and a real-time frequency modulation slope of each chirp signalcomponent in the echo signal, for each matched chirp signal component, determining the pulse arrival time of the chirp signal component according to a rising edge time, determining the real-time center frequency of the chirp signal component, and outputting the pulse arrival time, the real-time pulse width, the real-time frequency modulation slope and the real-time center frequency of each chirp signal component in a mult