DBS imaging and GMTI in a wideband airborne mechanic scanning radar

Abstract

A principle for choosing the coherent integration number and an improved Doppler beam sharpening (DBS) imaging algorithm for mechanic scanning radar are presented in this paper. By compensating the range migration in wideband airborne mechanic scanning radar, the proposed DBS imaging algorithm can efficiently improve the resolution of a DBS image. In addition, based on the characteristic that the echo from the moving target will be modulated by the antenna pattern, a novel method used to locate the moving target is also presented, which begins with the sub-aperture moving target detection followed by the sliding window detection. Proper location can be achieved by using this method. Finally, the results on real radar data are provided to demonstrate the effectiveness of these proposed methods.