Experimental evaluation of the ultra-wideband propagation channel in an underground mine

This paper presents a characterization of the ultra-wideband (UWB) propagation channel in an underground mining environment over a frequency range of 3 GHz to 10 GHz.. Both LOS and NLOS measurements are considered at two corridor depth levels of 40m and 70m The results are based on experimental data obtained during an extensive measurement campaign in the UWB frequency range where the path loss exponent and the coherence bandwidth are used for comparison purposes as a function of the physical depth of the channel. This lead to a simple model sufficiently accurate to characterize the statistics of the received signal in an underground mine.