Correlation properties and capacity of antenna polarization combinations for MIMO radio channel

This paper analyzes the MIMO (multi-input-multi-output) channel correlations under different antenna polarization combinations. Measurement results show that the horizontally polarized combination is more correlated than vertically-polarized combination. And in the environment with rich scattering, there is no benefit to using a cross-polarized combination to increase channel capacity. While in the environment without rich scattering, like in open space, the cross-polarized combination is an efficient way for enhancing channel capacity.