Multicomponent LFM Signal Detection and Parameter Estimation Based on Fractional Fourier Transform
Zhang Bu · Shuju caiji yu chuli · 2003
The detection and parameter estimation of multicomponent LFM signals is extensively discussed. This paper firstly introduces the basic theory and the basic properties of the fractional Fourier transform (FrFT), then a new method for multicomponent LFM signal detection and parameter estimation based on fractional Fourier transform is proposed. To eliminate the mutual effects of multiple LFM components, especially the strong LFM signal to weak LFM signal, a novel scheme combining the idea of elimination one by one with the fractional Fourier transform is presented, which can effectively detect weak LFM signals and estimate their parameters among some strong LFM signals. Simulational results show its effectivity.