步进扫频宽带探地雷达信号处理

基于一种步进扫频的宽带探地雷达前端设计,有效地解决探地雷达探测深度和高分辨率的矛盾。该前端系统发射151个步进频脉冲,接收地下物体反射的回波信号,对回波信号进行混频和滤波,然后,选取不同脉冲数处理回波信号,实现了对地探测深度深和分辨率高的优点。用Matlab对步进扫频宽带探地雷达信号进行仿真,并由实验平台验证超宽带步进频在目标探测应用中的有效性。实验结果表明,步进扫频宽带探地雷达可以实现较大的浅地层探测深度和较高的分辨率。

Step-sweep Broadband Ground Penetrating Radar Signal Processing

This paper is based on a step-sweep broadband ground penetrating radar front-end design, which effectively solves the contradiction between detection depth and high resolution of ground penetrating radar. The front- end system transmits 151 stepped- frequency pulses and receives echo of underground objects. Different pulse numbers are selected to process the echo signal after mixing and filtering to achieve deep detection depth as well as high resolution. The step- sweep broad-band ground penetrating radar signal is simulated by Matlab, and the experimental platform is used to verify the effectiveness of the ultra- wideband stepped- frequency in the target detection application. The experimental results show that the step-sweep broadband ground penetrating radar can achieve larger subsurface depth and higher resolution.