Abstract
A method is proposed in this paper to form SAR (Synthetic Aperture Radar) image from azimuth periodically raw data. A phase compensation item is presented to match the azimuth periodically gapped raw data in range frequency domain so as to obtain sparser data in range Doppler domain. Afterwards, it is feasible to recover the azimuth periodically gapped data in range Doppler domain with complex ISTA (Iterative Shrinkage-Thresholding Algorithm). The ISTA is extended to process complex SAR data with separating the real part of complex variable from the imagery part in this paper. Then, conventional SAR imaging algorithms are available to focus the recovered raw data. Point target simulation is operated to verify the effectiveness of the proposed method. Additionally, real SAR data is also used to validate the validity of the proposed method further.
Published Version
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