Sparse narrowband radar imaging for spinning targets with occlusion effect

The occlusion effect of targets with the spinning motion is usually ubiquitous when illuminated by the radar. Considering this effect in Doppler imaging for spinning targets is of practical significance. In this paper, we develop a novel approach to image spinning targets with occlusion effect, which is referred to as fused Lasso based Doppler-only snapshot imaging (FLDOSI). Due to the spinning motion, the radar illuminates different parts of the target at each observation instant, which causes the backscattering intensities of the scatterers are slowly time-varying. The two-dimensional (2D) fused-Lasso model is introduced to capture this time-varying characteristic and convex programming is employed to solve the model. Finally, experiments are carried out to validate the performance of the proposed method.