Translation compensation and micro-Doppler extraction of the precessional cone target

In order to extract the micro-Doppler of conic nodes and slip-type cone bottom scattering sources modulated by the translation, a method is proposed which compensates the translation by the instantaneous frequency of the cross-point among the micro-Doppler curves, and extracts the micro-Doppler of conic node and slip-type cone bottom scattering sources by orhtogonal matching pursuit (OMP). The scattering model is established by the micro-doppler characteristics of the conic nodes and slip-type cone bottom scattering sources of the processional cone-target, and the quadratic form velocity modulation is brought in, the analysis finds that the micro-Doppler of the cross point in time-frequency distribution is induced by the remaining translation. The Doppler of the cross point is extracted by the Harris-Laplace corner detection method, the translation parameter is estimated by the least square method and the translation is compensated. The atomic set, which is used to extract the signal of different scattering sources, is built according to the echo signal compensated by remaining translation. Finally, the simulation results show that the proposed algorithm is effective.