Comparison of channel emulation techniques in multiprobe anechoic chamber setups

This paper compares two different techniques for channel emulation in multiprobe anechoic chamber based setups, which is a candidate solution for the standardization of MIMO OTA performance testing of mobile devices. The comparison is performed via simulations of the field distribution, temporal correlation, and spatial correlation emulated by these methods for different number of probes. Results show that the emulation accuracy of the field distribution and temporal correlation are degraded when the emulation technique uses a single sinusoid per probe antenna, while the emulation accuracy of the spatial correlation depends on the power weights applied to the antenna and the number of probes employed.