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http://dx.doi.org/10.5573/ieie.2017.54.7.81

A Study on Autofocus Method for Back-Projection Algorithm under the Squint Mode in Synthetic Aperture Radar  

Hwang, Jeonghun (Department of Electronics Engineering Chungnam National University)
Kim, Whan-Woo (Department of Electronics Engineering Chungnam National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.54, no.7, 2017 , pp. 81-89 More about this Journal
Abstract
Autofocus(AF) Method is essential to overcome the performance degradation due to motion measurement errors under airborne SAR environment. In this paper, back-projection algorithm(BPA) is applied to SAR raw data acquired under the squinted mode, and preprocessing algorithm of AF for BPA is investigated. To apply AF to SAR image effectively, image backplane rotation method and doppler location alignment function for BPA are proposed. The proposed method is applied to SAR raw data acquired in a flight test and shows excellent performance improvement in real data.
Keywords
SAR; Squint Mode; Back-Projection Algorithm; Autofocus;
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