Abstract
ThThis letter proposes a novel four-dimensional multi-probe anechoic chamber (4D-MPAC) method for emulating time-domain non-stationary channel models of over-the-air (OTA) testing. The proposed method adds time dimension to the 3D-MPAC system, so that the channel model with spatial parameters changing over time can be emulated. In addition, 4D power angular spectrum similarity percentage (4D-PSP) as a figure of merit to evaluate the accuracy of the channel reconstruction is proposed for the first time. Based on the 4D-PSP, genetic algorithm (GA) is designed to reduce the number of active probes and testing cost. Furthermore, a dynamic motion scenario in a street is modeled by ray tracing simulation, where the time-domain non-stationary channel model is reconstructed by the proposed method with a small number of probes.
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