Two layers of beam alignment for millimeter-wave communications

Abstract

Beam alignment based on antenna array is a promising technique for millimeter wave communication in 5G. In this paper, we investigate the key parameters design under the framework of a two-layer beam alignment which includes wide beam training and narrow beam alignment. Firstly, an equivalent channel model with variant angles is proposed to simplify simulations. Secondly, the period of beam training and beam pattern design are investigated based on the practical phase-shifted antenna array. Analysis and numerical results show that the period of wide beam training and narrow beam training are about 200ms and 100ms, respectively, at a speed of 10m/s environment at 72 GHz.