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An Impulse Response Function for Evaluation of UWB SAR Imaging
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2010 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 58, no 7, 3927-3932 p.Article in journal (Refereed) Published
Abstract [en]

Based on analysis of a point target imaged by different synthetic aperture radar (SAR) systems, the commonly used impulse response function in SAR Imaging (IRF-SAR)—a two-dimensional (2-D) sinc function—is shown to be inappropriate for ultrawideband-ultrawidebeam (UWB) SAR systems utilizing a large fractional signal bandwidth and a wide antenna beamwidth. As a consequence, the applications of the 2-D sinc function such as image quality measurements and spatial resolution estimations are limited to narrowband-narrowbeam (NB) SAR systems exploiting a small fractional signal bandwidth and a narrow antenna beamwidth. In this paper, a more general IRF-SAR, which aims at UWB SAR systems, is derived with an assumption of flat two-dimensional (2-D) Fourier transform (FT) of a SAR image and called IRF-USAR. However, the derived IRF-USAR is also valid for NB SAR systems.

Place, publisher, year, edition, pages
IEEE , 2010. Vol. 58, no 7, 3927-3932 p.
Keyword [en]
Impulse response function in SAR imaging (IRF-SAR), impulse response function in UWB SAR imaging (IRF-USAR), synthetic aperture radar (SAR), Sinc, ultrawideband-ultrawidebeam (UWB).
National Category
Mathematics Signal Processing
URN: urn:nbn:se:bth-7227DOI: 10.1109/TSP.2010.2047503ISI: 000278813600046Local ID: diva2:834810
Available from: 2012-11-06 Created: 2010-06-22 Last updated: 2016-05-24Bibliographically approved

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Vu, Viet ThuyPettersson, Mats
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