Focusing Azimuth Periodically Interrupted SAR Echo with Deconvolution by Complex FISTA

Existence of periodical interruption in Synthetic Aperture Radar (SAR), which is caused by various avenues, leads to challenges on SAR data imaging. To resolve this issue, a novel approach is developed in this paper. The proposed approach deal with periodically interrupted raw SAR data by complex deconvolution. Complex Fast Iterative Shrinkage-Thresholding Algorithm (FISTA) is operated to perform complex deconvolution and restore the azimuth spectrum from periodically interrupted SAR echo. Then, conventional SAR focusing method is able to attain imaging result from interrupted echo data. The proposed method processes interrupted echo with lower fake targets and operates more quickly than approach on basis of Iterative Shrinkage-Thresholding Algorithm (ISTA). Experiments on simulation data and actual SAR echo illustrate the effectiveness of the proposed approach.