HHT方法在探地雷达回波信号特征提取上的应用

摘要

The GPR echo signal is actually non-stationary and non-linear. It not only contains the signal of buried object, also contains the directive wave which can hide the object signal and make it difficult to recognize the object. In this article, HHT method is adopted to analyze the feature of GPR signal and extract the instantaneous frequency of IMF components as feature vector. The result shows the technique of HHT is effective for GPR signal which can preferable avoid the influence of the directive wave.%探地雷达回波信号是一种非平稳非线性信号，其中不仅包含地下埋藏物的目标信号，还包含有可能掩藏目标信号的直达波信号，给目标的识别带来困难。文中采用HHT方法对探地雷达回波信号进行特征分析，提取回波信号的IMF分量的瞬时频率作为特征向量。实验结果表明，用HHT方法提取特征可较好的避免直达波影响，该方法是可行而有效的，为进一步鉴别地下埋藏物提供了新的思想和方法。