①清华大学电子工程系 北京 100084;②Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA
Improved RDM for SAR Autofocusing
Li Gang①; Peng Ying-ning①; Xia Xiang-gen②
①Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;②Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716, USA
Abstract:Radar (SAR) autofocus processing, whose performance degenerates with low contrast of the scene. This paper proposes an improved RDM for SAR autofocusing. Based on the relationship between the Doppler rate and the range, the proposed method can adaptively overcome the effect of the low contrast on the Doppler rate estimation and obtain fine autofocusing results. The experiments with real SAR data show the effectivity of the proposed method.