The use of a Software Defined Radio as an OFDM GPR

Commercially available off the shelf Software Defined Radios (SDR) have many of the components required to construct an OFDM or a stepped frequency GPR. Some additional components are required in order to make phase measurements however, as described here. There are also design features of the SDR used here which could make them unsuitable, but which can be mitigated as investigated here.