Design of the L-band wideband LFM signal generator based on DDS and frequency multiplication
Qinghong Li, Yang Dong, Xiao Hua Mu, Qing Lin Huo · 2012
Wideband linear frequency modulated (LFM) signal is widely used in precise distance measuring radar system. As traditional methods of generating LFM signal have a lot of disadvantages such as instability and nonlinearity we propose a different solution to wideband LFM signal generator in L-band based on DDS and frequency multiplication. The proposed method produces the baseband LFM signal using the DDS, and then adds the baseband signal into the frequency multiplication system; last we can achieve a pure L-band wideband LFM signal. The measurement result shows that the proposed can fulfill each requirement of anticipant satisfactorily.