Abstract
In landmine detection by a hand-held ground penetrating radar (GPR) sensor, GPR signal is suffered from the unstable stand-off distance between the antenna and the rough ground surface. We propose in this letter a method to compensate the irregularity in the arrival time of the ground reflection in GPR and applied it to data sets acquired in minefields in Cambodia. Selecting the frequency with the highest power of the ground surface reflection, the phase of the received signal at the frequency is equalized to compensate the irregular reflection. We demonstrate that the ground reflection signal became uniform and confirmed the quality of the shape of the target can be improved.
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