UHF fading in factories

There has been recent interest in characterizing UHF propagation within buildings and houses. Factory radio channels, however , have not been discussed previously in the literature. This paper details the results of narrow-hand propagation measurements performed at five factories. The extensive empirical data indicate that path loss is dependent upon local surroundings and is log-normally distributed , temporal fading is Rician, and small-scale signal fluctuations due to receiver motion are primarily Rayleigh, although Rician and log-normal distributions fit some of the data. Shadowing effects of common factory equipment likely to obstruct indoor radio paths are also given here.