Vol. 128

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2012-06-06

Motion Compensation for Squint Mode Spotlight SAR Imaging Using Efficient 2D Interpolation

By Sang-Hong Park, Jong-Il Park, and Kyung-Tae Kim
Progress In Electromagnetics Research, Vol. 128, 503-518, 2012
doi:10.2528/PIER12040201

Abstract

In the squint mode airborne spotlight synthetic aperture radar system using the range migration algorithm (RMA), autofocus (AF) technique yields poor results due to the squint spreading of the point spread function (PSF) of a scatterer. Thus, two-dimensional (2D) interpolation is required to direct PSF blurring in cross-range direction, to improve the cross-range resolution ¢y and to remove the spatially-varying sidelobe. Because conventional 2D interpolation requires huge computation time and yields large computation errors, we propose an efficient 2D interpolation technique for squint-mode RMA composed of two 1D interpolations. Simulation results using the measured turbulence data show ¢y was improved considerably and PSF was successfully focused by the proposed method with a reduced computation time.

Citation


Sang-Hong Park, Jong-Il Park, and Kyung-Tae Kim, "Motion Compensation for Squint Mode Spotlight SAR Imaging Using Efficient 2D Interpolation," Progress In Electromagnetics Research, Vol. 128, 503-518, 2012.
doi:10.2528/PIER12040201
http://jpier.org/PIER/pier.php?paper=12040201

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