Channel Emulation for Dynamic Channel Models With Programmable Turntable in OTA Testing

Dynamic channel models are under extensive investigation to provide a more accurate modeling of varying interaction between wireless transceivers and propagation environments. On the other hand, the existing channel emulation methods for over-the-air (OTA) testing were designed for spatially static channel models. In this letter, we propose a novel method for dynamic channel emulation by utilizing the ability of the programmable turntable to adjust the orientation of the device-under-test (DUT) during OTA testing. Thanks to the additional degree of freedom provided by the programmable turntable, more favorable angular positions between the DUT and the OTA probe antennas can be dynamically obtained to cater for the instantaneous channel multipath directions. Simulation results demonstrate that the proposed method can significantly improve the accuracy of dynamic channel emulation, which exhibits strong feasibility even under the practical constraint of turntable rotation speed.