Method for estimating magnitude-phase characteristics of radar target echo signal simulator

The invention provides a method for estimating magnitude-phase characteristics of a radar target echo signal simulator. The invention has the technical scheme that the method comprises the following steps of: forming an ideal linear frequency modulated signal into a transmitting signal through a simulator transmitting channel; obtaining a closed-loop distorted signal according to the transmittingsignal; carrying out correlation operation on the closed-loop distorted signal and the ideal linear frequency modulated signal to obtain a time domain pulse compressed signal; processing the time domain pulse compressed signal to obtain a phase-frequency characteristic estimation value and an amplitude-frequency characteristic estimation value of the simulator; carrying out autocorrelation operation on the ideal linear frequency modulated signal and processing an autocorrelation operation result to obtain a magnitude-frequency response modified function; and multiplying the phase-frequency characteristic estimation value, the magnitude-phase characteristic estimation value and the magnitude-frequency response modified function of the simulator to obtain a magnitude-phase characteristic estimation value of the closed loop channel of the simulator. The method for estimating the amplitude-frequency characteristics, provided by the invention, has high efficiency and accuracy; and an estimated result can be directly used for designing a coefficient of a real-time correction digital filter of the simulator.