Airborne SAR imaging with 0.1 m resolution: Bandwidth management and image formation

This work addresses the study of bandwidth management and image formation for airborne SAR imaging with 0.1 m resolution. The frequency domain synthetic bandwidth method is analyzed, and a novel quasi method that applies to deramp receive mode is proposed. Some issues arising in practical implementation of the technique are discussed, that is, the filter design and the solution to overlap. Different algorithms with integrated motion compensation (ECS/ECZT/EOK) are compared with each other in terms of their focusing processing, and some expressions for allowable range and range scene extent are presented. Moreover, analysis of an approach combining the synthetic bandwidth technique and Omega-K algorithm is presented. It offers the possibility of achievement X-band airborne SAR imaging up to 0.1 m resolution. Finally, we present results on simulated data aimed at validating the whole analysis and the proposed procedure.