Experimental comparison of MIMO OTA testing methodologies

In this paper, we describe our developed three multiple-input multiple-output (MIMO) over-the-air (OTA) testing systems of the simplified MIMO OTA testing system using the reverberation chamber, that in the anechoic chamber, and the spatial fading emulator in the anechoic chamber. We also discuss the results of the measurement campaign which was conducted to experimentally compare the difference between them. Based on the results, we conclude that we can employ any type of MIMO OTA testing methodology for the MIMO OTA testing to differentiate overall MIMO OTA performance including multi-antenna characteristics.