A New Method for Information Extraction of Micro-Doppler in Strong Ground Clutter with Chirp Signal

Under chirp radar,in order to solve the imaging problem of a target with rotating parts in strong ground clutter,a new method for extracting micro-Doppler information was proposed.We applied cancellation technique in time domain to eliminate ground clutter,and transplanted the cancellation principle into spectrogram,which could effectively achieve the extraction and separation of micro-Doppler.Thus a clearer ISAR image of the target was obtained.The feasibility of the method was proved by the simulation to three kinds of ground clutter.