Reduction of 3×3 MIMO volume requirements by using true polarization diversity techniques

Polarization diversity techniques have not received as much attention as others due to the significant difference in mean signal level between co-polarized and cross-polarized branches when one polarization is transmitted. However, MIMO systems where the multipath fading is only partially correlated could use polarization diversity to provide a high diversity gain. In this contribution, progressive (hue) polarization diversity performance for 3times3 MIMO systems under Rayleigh-fading environments is evaluated through simulations and measurements in a reverberation chamber. True polarization diversity was found to be as significant as spatial diversity at improving diversity gain, and hence MIMO system capacity.