Height-dependent path loss model and large-scale characteristics analysis of 28 GHz and 38.6 GHz in urban micro scenarios

In this paper, by equipping with omni-directional antennas and high gain power amplifier in our channel sounder system, the propagation characteristics which de-embed antenna response at 28 GHz and 38.6 GHz are analyzed. The base station height-dependent path loss model is derived by the channel measurement in non-line-of-sight (NLOS) urban micro outdoor scenarios. Furthermore, the path loss models at 28 and 38.6 GHz are compared with the path loss model at 3.5 GHz. Also, the proposed path loss model is compared with the 3GPP 38.900 model, and it can be found that the 3GPP will overestimate the system performance since the 3GPP model has lower path loss. Finally, some preliminary research on the shadowing effect of human body and vegetation are presented.