Title of Paper:SAR Moving Target Imaging Using Semi-blind Two-dimensional Autofocus Algorithm

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Affiliation of Author(s):电子信息工程学院

Journal:2017 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP 2017)

Key Words:two-dimensional autofocus polar format algorithm moving target imaging

Abstract:Due to uncertainty on target's motion, synthetic aperture radar (SAR) processing can't compensate for the two-dimensional (2-D) phase error of moving targets completely. Therefore, moving targets SAR images often appear 2-D defocused. In this paper, we propose a 2-D autofocus method for refocusing the defocused moving targets SAR images. The new method only requires a direct APE estimation, while the residual 2-D phase error is computed directly from the estimated APE by exploiting the analytical relationship between the 2-D phase error and APE. The simulation experiment proves the proposed approach offers obvious advantages in both computational efficiency and estimation accuracy.

Translation or Not:no

Date of Publication:2017-01-01

Co-author:Wang, Chenqin,He, Xueli

Correspondence Author:mxh