Radar micro-motion feature extraction of cone target based on Hilbert-Huang transform

摘要

This paper studies on the cone target. Firstly, the modulating function of a precession target on the radar is analyzed. Then, the decomposition method of multi-component sinusoidal frequency modulated signal based on empirical mode decomposition (EMD) is studied. The instantaneous frequency of each intrinsic mode function is gained by using Hilbert Transform (HT). The precession features of precession period, precession angle, micro-motion range ratio of different scatters and geometry features are extracted. Finally, the results of feature extraction by utilizing the darkroom measurement are shown in figures, which validate the ideas.