Measurement characterization of 37.2GHz indoor radio channels in terms of antenna radiation patterns and threshold levels

In order to construct efficient communication systems for indoor radio networks and personal communication network (PCN) systems, a great deal of effort has been expended and considerable quantities of information obtained on the propagation of radio transmissions, mostly in the form of experimental measurements. This paper intends to add some experimental results conducted at 37.2GHz and aiming the investigation of the effect of the antenna radiation patterns on the indoor line of sight propagation channel. For narrowband results, cumulative distribution functions for the received signal envelope are given to determine multipath characteristics in a number of indoor microcell channels employing directional and omnidirectional antennas. A model for assessment of the unit-cell size, based on experimental data, is reported. In addition, wideband results have been performed using the same type of antennas and the RMS delay spreads have been obtained for different threshold levels.