A Multi-Angle Imaging Method Base on Improved Range Migration Algorithm for Airborne MIMO-SAR

In order to solve the contradiction between high pulse repetition frequency (PRF) and wide-swath in multi-angle synthetic aperture radar (SAR), a multi-angle imaging model combined with multiple-input multiple-output synthetic aperture radar (MIMO-SAR) is proposed. The model utilizes more freedom in azimuth degrees provided by MIMO-SAR to remove azimuth ambiguity caused by low PRF, and successfully solves that contradiction. At the same time, considering the problem of low utilization of spectrum in multi-angle imaging SAR, an improved range migration algorithm (ImRMA) is proposed, which can effectively improve the utilization of the spectrum for data processing. Simulation experiments show that the effectiveness and superiority of the proposed imaging method.