Sidelobe Control for Bistatic SAR Imaging

This letter presents coherent and incoherent nonlinear apodization methods for bistatic synthetic aperture radar (SAR) imaging. The methods are developed on the principle of nonlinear apodization for monostatic SAR imaging and a \omega \,\,-\,\,k relationship representing the bistatic region of su...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2022, Vol.19, p.1-5
Main Authors: Vu, Viet T., Pettersson, Mats I.
Format: Article
Language:English
Subjects:
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Apertures
Apodization
Apodizations
Azimuth
bistatic
Bistatic sar imaging
Bistatic synthetic aperture radar
Fourier transforms
Geometry
Imaging techniques
Methods
Peak sidelobe
Radar imaging
Radar polarimetry
Region of support
resolution
SAR (radar)
SAR imaging
Side lobes
sidelobe
Sidelobe control
Sidelobe reduction
Sidelobes
Simulation
Synthetic aperture radar
synthetic aperture radar (SAR)
ω - k
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Summary:This letter presents coherent and incoherent nonlinear apodization methods for bistatic synthetic aperture radar (SAR) imaging. The methods are developed on the principle of nonlinear apodization for monostatic SAR imaging and a \omega \,\,-\,\,k relationship representing the bistatic region of support. This relationship plays an important role in designing 2-D windows for the apodization methods. The simulation results show that the presented apodization methods work efficiently with bistatic SAR imaging. In the experiment with a coherent dual apodization (CDA) method presented in this letter, the sidelobe attenuates very fast, and the peak sidelobe is reduced about 16 dB, while the resolutions in azimuth and range are maintained.
ISSN:1545-598X
1558-0571
1558-0571
DOI:10.1109/LGRS.2021.3099174