Experimental Demonstration of Wave Source Location Estimation Method for Spectrum Sharing in 28-GHz-Band 5G System

This paper experimentally investigates a direction of arrival (DOA)-based wave source location estimation method for spectrum sharing in millimeter-wave band local and private fifth-generation (5G) mobile communication systems. In the DOA-based estimation, it is important to extract line-of-sight (LOS) component from received signals. Considering that 5G systems, synchronization signal / physical broadcast channel (SS/PBCH) blocks are transmitted with beam-sweeping initial access, our measurement system performs DOA based on maximum-power block where LOS seems be dominant. taking advantage sparsity propagation channels both angular space delay time domains, adopts compressed sensing (CS)-based approach. As antenna, directional pattern employed, which enables only four antenna elements. We demonstrate performance an outdoor environment using commercial 28 GHz-band base station (BS). Experimental results show achieves error 5.8 m 20 measurements.