A modified apodization method in SAR/ISAR processing

Author

Huibo, Ji ; Yiding, Wang ; Yirong, Wu ; Hong Jan

Author_Institution

Inst. of Electron., Chinese Acad. of Sci., Beijing, China

Volume

6

fYear

2003

fDate

21-25 July 2003

Firstpage

3991

Abstract

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.

Keywords

Fourier transforms; geophysical signal processing; image resolution; radar imaging; radar resolution; synthetic aperture radar; 2D Fourier transform; SAR/ISAR image processing; apodization algorithm; image resolution; inverse synthetic aperture radar; lower sidelobe level; parametric windows; synthetic aperture radar; Algorithm design and analysis; Energy resolution; Fourier transforms; Frequency; Image processing; Image resolution; Scattering; Signal resolution; Space vehicles; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International

Print_ISBN

0-7803-7929-2

Type

conf

DOI

10.1109/IGARSS.2003.1295339

Filename

1295339