Millimeter-Wave Beam Tracking in Multi-User Communication Systems Based on Out-of-Band AOA Estimate: Design and Implementation

Abstract

Millimeter-wave (mmWave) with large available spectrum is considered as the most promising frequency band for future wireless communications with the increasing demand of ultra high speed wireless communications Since the mmWave suffers a serious path-loss beamforming is crucial to achieve long distance communications However a beam misalignment due to mobility between two communicating devices can cause a significant signal drop and thus a beam tracking technique is important to support mobility In this thesis a prototype based on Software Defined Radio (SDR) is developed to study the beam tracking problem based on angle estimate obtained from out-of-band information The implemented prototype operates at both sub-6GHz and 28GHz band with the capability to track multiple users simultaneously Filed measurements are conducted both in outdoor and indoor environment The measurement results confirm the advantage of using out-of-band as a side information for tracking UE in comparison with the conventional method

Date of Award	2019
Original language	English
Supervisor	Kuang-Hao Liu (Supervisor)