Mm-Wave Massive MIMO Channel Sounding in Industrial IoT Scenarios

This paper presents results of massive multi-input multi-output (mMIMO) channel characteristics based on measurements carried out in an industrial environment at frequency ranges from 26 GHz to 30 GHz. Three different propagation conditions were considered, i.e. line-of-sight (LOS), obstructed LOS (OLOS) and non-LOS (NLOS), and two types of virtual antenna arrays were measured using monopole antennas, i.e. the planar and cubic arrays composed of 21x21 and 5x5x5 elements, respectively. The main results on large-scale parameters as well as an analysis on specular and dense multi-path components are then presented. Finally, the spatial correlation properties over a large antenna arrays were investigated in LOS and OLOS scenarios.