Abstract:

Broadband linear frequency modulation radar adopts Dechirp signals to reduce the bandwidth of the signal,and to obtain a huge processing gain of the broad bandwidth.Because of unmatched signal processing,it is difficult to realize the DRFM based jamming through narrowband processing.Illumed by Dechirp signal processing,this paper presents a broadband DRFM based on Chirp transform.The method can reconstruct radar signals through Dechirp transform,DRFM and Chirp transform.Theoretical analysis and simulation show that this method can reserve the time frequency characteristics and lower the processing bandwidth.

Key words: dechirp;chirp transform;DRFM