Abstract:Aimed at wide-band linear frequency modulation(LFM) radar，a method of image deception signal generation was put forward. Via the analysis of the demodulation of radar echo, the expression of the image deception signal was obtained. Then, a solution based on Digital Up Converter(DUC) was proposed, which implemented the conversion of a complex digital baseband signal to a real passband signal. Through the analysis by using high performance spectrum analyzer and image software, the validity of this method to generate jamming picture(400×400 pixel) was proved.