This work shows how both frequency and the election of path loss model affect estimated spectral efficiency. Six different bands are considered, ranging from 2.6 GHz in ultra high (UHF) band to 73 millimeter wave (mmWaves), using single-slope two-slope path-loss models. We start by comparing four urban models for UHF: urban/vehicular pedestrian test environment ITU-R M. 1255 Report, which inclu...

We state a number of problems suggested by recent work on Lp analogs of Cuntz algebras, UHF algebras, group C*-algebras, and crossed products.

Gas-insulated equipment is an important part of the power system owing to its advantages small footprint, large transmission capacity, and high reliability. Detection insulation defects partial discharge (PD) for operation maintenance, combination multiple detection methods can greatly improve accuracy PD detection. In this study, three kinds defects, namely, floating defect, void surface are s...

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 distr...