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提出一种变迹法带宽外推合成孔径雷达(SAR)超分辨率成像算法,可以提高合成孔径雷达成像分辨率并抑制旁瓣。利用空间变迹法(SVA)处理后的带宽扩展效应,对频谱进行幅度均衡使有效带宽扩展,并利用非整数倍Nyquist采样率空间变迹法对外推后的旁瓣抑制,得到输出的高分辨率图像。仿真实验和定量分析验证了本文方法的有效性。 更多还原

【Abstract】 The paper develops a new technique enhancing SAR resolution as well as suppressing sidelobes based on apodization technique.The method makes use of the effect of signal bandwidth expansion after apodization,and uses an inverse weight function to equalize the SVA spectrum. A modified noninteger Nyquist SVA formulation is used to suppress sidelobes after extrapolation. Examples and quantity analysis demonstrate the effectiveness of the paper’s method. 更多还原