Improving the Lateral Detection Performance of GPR Based on Beamforming.

Ground penetrating radar (GPR) is a nondestructive detection technology. It uses high frequency electromagnetic energy to locate targets underground. In the direction of motion, GPR can produce Bscan with good performance. The lateral image is typically constructed using the results of many detections. By integrating beamforming with stepped frequency continuous wave (SFCW), we propose a method that increases the lateral detection performance. The performances of two beamforming methods in GPR are compared. We designed a 1x4 multistatic GPR and did two experiments. The findings demonstrate that the beamforming improves the lateral detection performance in comparison with single-static GPR. Compared with delay-and-sum methods, the minimum variance distortionless response (MVDR) method has a better performance in suppressing the sidelobe level and avoiding false targets.