Efficient probe weighting method for multiple-input multiple-output over-the-air testing

Abstract

The multi-probe anechoic chamber (MPAC) method is utilized to reconstruct the channel by distributing proper weights to the probes in the over-the-air (OTA) testing scenario. The commonly used probe weighting method is a convex optimization solver. However, the solver is time-consuming. Owing to the numerous probes required for massive multiple-input multiple-output (MIMO) OTA testing, more time will be taken. Two efficient probe weighting methods are proposed in this paper. The results of the simulation verify that the proposed methods have higher computing efficiency and can achieve accuracy similar to that of the convex optimization solver.