Narrowband imaging method for spatial precession cone-shaped targets

The imaging method of the mid-course missile is the key technique of the missile defense system. Because of the special precession character of the ballistic missile warhead, the inverse synthetic aperture radar method cannot realize phase compensation with the constant phase offset function, which leads to blurring of the image. In this paper, we propose a new narrowband radar imaging method for the precession cone-shaped targets. The method acquires the Doppler modulation of the precession target’s scattering centers with high resolution time-frequency analysis method and extracts the Doppler parameter from the result of the time-frequency analysis with the general Radon transform, then reconstructs the scattering centers positions in the parameter domain. The experiment results with the anechoic chamber data of the representative cone-shaped object showed the effectiveness of the method.