ℓq Regularization Method for Spaceborne SCANSAR and TOPS SAR Imaging

摘要

SCANSAR and TOPS SAR are two typical wide swath modes, which increase the swath by periodically switching thernincidence angle of antenna among different subswath from near to far range. Sparse signal processing technique canrnbe applied to SAR imaging by solving ℓq (0 < q ≤ 1) regularization problem to achieve high-resolution image that canrnimprove the image performance effectively, e.g., suppress sidelobe, clutter and azimuth ambiguity. In this paper, wernproposed an azimuth-range decouple-based ℓq regularization method for SCANSAR and TOPS SAR imaging. Com-rnpared to the MF-based algorithm, the proposed method can suppress clutter, reduce sidelobe efficiently. In addition,rnit has less computational complexity than conventional ℓq regularization technique. Experimental results based onrnTerraSAR-X data demonstrate the validity of the proposed method.