Title :
Spatially variant apodization for sidelobe control in SAR imagery
Author :
Stankwitz, H.C. ; Dallaire, R.J. ; Fienup, J.R.
Author_Institution :
Environ. Res. Inst. of Michigan, Ann Arbor, MI, USA
Abstract :
Presented here is a class of nonlinear operators which significantly reduce sidelobes in SAR imagery without degrading mainlobe resolution. Implementation is via sequential nonlinear operations applied to complex-valued (undetected) SAR images. SAR imaging is used to motivate the concepts developed in this paper. However, these nonlinear apodization techniques have potentially broad and far-ranging applications in antenna design, sonar, digital filtering, etc., i.e. whenever data can be represented as the Fourier transform of a finite-aperture signal
Keywords :
image processing; radar theory; synthetic aperture radar; Fourier transform; SAR imagery; antenna design; digital filtering; finite-aperture signal; mainlobe resolution; nonlinear apodization; sequential nonlinear operations; sidelobe control; sonar; spatially variant apodization; Aperture antennas; Degradation; Image resolution; Intellectual property; Layout; Pixel; Radar polarimetry; Signal design; Sonar; Synthetic aperture radar;
Conference_Titel :
Radar Conference, 1994., Record of the 1994 IEEE National
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-1438-7
DOI :
10.1109/NRC.1994.328113
