Experimental spatial correlation characteristics of propagation channels in indoor environments

Spatial auto- and cross-correlation characteristics of propagation channels are investigated for four indoor scenarios using measurement data. In addition to the well-known spatial auto-correlation effect, significant cross-correlation between channels is also observed. We found that non-zero spatial cross-correlation among channels may occur in three scenarios with possibly different mechanisms. These results should be considered when establishing realistic models for the spatial cross-correlation behavior of channels.