A Novel Image Domain Method of Suppressing Moving Target Interference for the Azimuth Multi-Channel SAR

Combined with digital beamforming technology, azimuth multi-channel SAR can be used to achieve high-resolution wide-range imaging. However, the moving target in the imaging scene cannot be reconstructed well to obtain its unambiguous azimuth spectrum. Therefore, in the final imaging result, the moving target is defocused and there are multiple ambiguity points along the azimuth, which affects the original ground scene. Target. Using traditional space-time adaptive processing methods to suppress moving targets in images, the degree of spatial freedom is often difficult to satisfy in actual operations. In order to solve this problem, this paper proposes a moving target suppression method based on the multi-channel SAR image domain. Since the moving target is partially focused in the SAR image, different steering vectors can be used at different moving target positions. Reduce the need for space freedom. Finally, simulations verify the effectiveness of this method.