Beam Probability Metric for OTA Testing of Adaptive Antenna Systems in Multi-Probe Anechoic Chamber Setups

With the utilization of massive multiple-input multiple-output (MIMO) and millimeter-wave (mmWave) technologies in 5G communications, over-the-air (OTA) testing for 5G antenna systems has become a strong need because conducted testing is no longer applicable. New OTA testing metrics are required to evaluate new performance of 5G antenna systems. This paper investigates whether the recently proposed metric, e.g. beam probability is suitable to evaluate channel emulation accuracy for adaptive antenna systems in multi-probe anechoic chamber (MPAC) OTA setups. Well-known 2D spatial channel models are selected as examples in simulation results to discuss the relationship between device under test (DUT) size and number of OTA antennas for beam probability metric.