New method to extract radial acceleration of target from short-duration signal at low SNR

摘要

In order to extract target radial acceleration from radar echo signal at low SNR(signal-to-noise),this paper employed FRFT(fractional Fourier transformation)to analyze short-duration radar echo and studied the relations between signal convergence peaks in matched transformation domain and signal duration and modulated frequency of signal.When signal duration is specified,the method of multiplying sampled signal by the known frequency modulated signal to alter modulated frequency was presented,which generated the new signal with larger convergence peaks than the initial signal in matched transformation domain.Thus,it could successfully estimate the radial acceleration of radar target at low SNR.Simulations were conducted to show the feasibility and effectiveness of the method.