【摘要】 研究了单个和两个物体的探地雷达(ground penetrating radar,GPR)信号时域和时频域特征随物体尺寸、相距距离、介电常数的变化规律,给出了广义S变换(generalized S transform,GST)参数和双峰属性频点选取的方法以及小物体的定义,讨论了通过提取时频域的双峰属性来提高对单个物体上下界面反射波和两个物体回波的分辨率.并且指出了结合GPR信号时域和时频域特征以及双峰属性,可以大致估计单个物体的大小和两个物体之间的距离范围.更多还原

【Abstract】 The variation regularity of characteristics of ground penetrating radar(GPR) signal of one object and two objects according to the size,distance and permittivity in time domain and time-frequency domain was studied in the paper,the selection rule of parameter and frequency point of twin-peak attribute of generalized S transform(GST) as well as the definition of a small object were given,the resolution improvement of two reflections of one object and two echoes of two objects through twin-peak attribute of GST was discussed.It is pointed out that the size of one object and the distance between two objects can be roughly estimated in combination of the attribute with GPR signal characteristics in time domain and time-frequency domain.更多还原