A modified apodization method in SAR/ISAR processing

SAR/ISAR image processing involves a 2D Fourier transform that produces high intensity sidelobes which obscure low intensity scatters in the image. Although the sidelobe can be reduced using parametric windows, the image resolution becomes worse. The apodization technique can reduce sidelobe level while maintaining the image resolution. In this paper, based on the analysis of the apodization algorithm, a modified apodization method was present via stronger constraint. The modified method has higher resolution and lower sidelobe level than the original method. This method was proved correct with a real ISAR image.