Target detection method using fast Fourier transform

摘要

The present invention relates to a method for detecting a target to be activated using a fast Fourier transform, and receives a position and a velocity of a target measured by a radar through sampling at a predetermined time interval, and uses a simple Kalman filter at each sampling time. Calculating a difference (estimated error) between the measured position and the velocity of the corresponding target and the predicted position and the velocity; Performing a Fast Fourier Transform on each of the calculated estimation errors and comparing them with a set threshold; And determining that the target has started maneuvering if any one of the samples sampled in the comparison process is larger than the threshold value.;According to the present invention, by using the FFT in the estimation error obtained through the position and the speed measured by the radar to detect the moving object, the target can be detected and the acceleration of the target to be started can be obtained. It is also possible to detect when the activation of the target being activated ends.