基于模糊分形脉冲反褶积的探地雷达信号处理

Signal processing of ground-penetrating radar on the principle of deconvolution based on fuzzy fractal pulse

为了提高探地雷达的分辨率,降低雷达探测过程中衰减、频散及其他干扰所造成的影响,提出了基于模糊分形脉冲反褶积应用于探地雷达信号的后处理,用分形特征取代反褶积中对反射系数功率谱为白噪的假设,并给出了具体的实现步骤;为了验证该方法的合理性,以直径为100mm的PVC塑料管为标定物,设计了将标定物以不同深度和不同间距埋置在沙体中的模型试验。理论分析和试验结果表明:基于模糊分形脉冲反褶积的原理处理雷达信号,对于降低噪声干扰和提高分辨率有着一定的优势,可作为雷达信号处理方法一种很好的补充。

In order to improve the resolution of ground-penetrating radar,and reduce attenuation,dispersion and effects caused by other interference in the process of radar detection,the deconvolution based on fuzzy fractal pulse was proposed to be applied to signal processing of ground-penetrating radar.The assumption that the power spectrum of reflection coefficient was white noise was replaced by the fractal feature,and the specific implementation steps were provided.In order to verify the reasonableness of the method,a PVC plastic pipe with a diameter of 100 millimeters was taken as a calibration object and a model test was designed with the calibration object buried in the sand at different depths and different intervals.The theoretical analysis and experimental results show that for lowering noise and improving resolution,there are certain advantages to deal with radar signals on the principle of the deconvolution based on fuzzy fractal pulse,which can be used as a good supplement for radar signal processing.