Angular Dispersion Modelling for 5G Wireless Link with Directional Antennas

Abstract

The development of fifth-generation (5G) systems is associated with the use of higher frequency bands and spatial multiplexing. A practical implementation of this multiplexing method is based on antenna arrays that allow the use of new technologies like active phased array antenna (APAA) or massive APAA. However, most of channel modeling methods available in a literature do not consider the selectivity of the transmitting and receiving antennas. In such cases, we can assume that the modeling is carried out for isotropic or omnidirectional antennas. In this paper, the angular dispersion modeling method for a 5G wireless link with directional antennas is shown what constitutes its novelty. The authors describe a multi-ellipsoid propagation model, which is the basis for simulation studies. Based on assumptions from real measurements for 38 GHz-39 GHz frequency range, an assessment of the influence of antenna directions and beamwidths on power angular spectrum and angle spreads in the azimuth and elevation planes is presented. The obtained simulation results show the importance of considering the three-dimensional modeling antenna patterns in the planning of 5G wireless lines.