Channel sounding of industrial sites in the 2.4 GHz ISM band

The results of channel soundings taken on a selection of six different industrial sites are presented. These results focus on the RMS delay spreads calculated from the channel soundings and the distribution of these results for each site. The distribution of RMS delay spread values is analysed and forms the basis of a statistical description of the multipath propagation on the tested sites. In particular the distribution is used to define the expected propagation delay across the site. The relation between the RMS delay spread and the irreducible-BER is discussed and this is used to link the distribution of RMS delay spread values to bit error rate performance on industrial sites. It is seen that the environment surrounding sites is significant.