Comparison of methods of the resolution increase in GPR for the short range targets

This paper describes different approaches for high resolution short range 3D imaging with ground penetrating radar (GPR) based on research performed at the Radar R&D (Tomsk). Radar R&D is active in the field of GPR technology and its applications more than 15 years. Ultra-wide operational bandwidth in GPR can be used to obtain high-resolution images of targets. In this paper, different approaches to highresolution imaging with UWB radars are discussed and compared. As a rule, in existing software of the industrial radar the high-frequency filtration of signals is used that essentially limited efficiency of GPR investigation. It is described that methods of restoration for distorted signals have advantages compare filtration. Possibilities of wavelet transformation for resolution increase of short range targets are discussed. The analysis is carried out on the test images and illustrated by experimental examples.