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压缩感知合成孔径雷达射频干扰抑制处理

, PP. 59-62

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Abstract:

对基于压缩感知技术的合成孔径雷达(SAR,SyntheticApertureRadar)成像,射频干扰(RFI,RadioFrequencyInterference)的存在会破坏场景稀疏的先验条件,造成成像质量恶化,使得后续的成像处理无法正确完成的问题,提出了一种压缩感知SAR的RFI抑制方法.首先基于RFI在频域的稀疏特征,采用贪婪算法结合最小描述长度(MDL,MinimumDescriptionLength)估计出RFI分量稀疏度;然后对每个脉冲的回波信号,估计RFI信号分量并在时域直接滤除,再应用常规的压缩感知SAR重构算法实现成像处理.L波段SAR数据的仿真处理结果验证了文中方法的有效性.

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