基于改进RDM的SAR自聚焦算法
doi: 10.3724/SP.J.1146.2007.01540
Improved RDM for SAR Autofocusing
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摘要: 反射率偏移法(RDM)是合成孔径雷达(SAR)自聚焦的经典算法，当场景对比度较低时，RDM自聚焦效果变差。该文提出了一种RDM的改进方法，该方法利用多普勒调频率与距离的函数关系，自适应地修正低对比度区域对多普勒调频率估计的影响，保证良好的自聚焦效果。实际SAR数据实验证明了该方法的有效性。
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关键词:
- 合成孔径雷达;自聚焦;反射率偏移法
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. -
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