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In this paper, the performance of a radio propagation channel using a circularly polarized antenna system was evaluated. Measurement campaigns, made in a former gold mine at 2.4 GHz, have been analyzed to obtain the relevant statistical parameters of the channel. Capacity results show a remarkable improvement compared to published Vivaldi antenna results in a different mine.
In this article, patch antennas were used for transmission and reception of a 2.4 GHz radio frequency signal. The aim is to characterize the propagation channel using directive antennas in an underground mining gallery. Satisfactory channel parameters' results were achieved, based on measurements.
In this work, we are interested in the evaluation of the capacity of the ultra wideband (UWB) channel in an underground mine. Using optimal power spectrum allocation (OPSA) at the transmitter side, we have computed this capacity by taking into account the fading characteristics of the channel. The results show the pertinence of the optimal power spectrum allocation for this type of channel. An improvement...
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