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Abstract
In this paper, the performances of a general MIMO system with arrays at both ends adopting different antenna polarization combinations are studied. Our results show that MIMO systems exploiting the vertically co-polarized antenna arrays at both ends outperform the horizontally co-polarized combination. The adoption of the orthogonal polarization antenna arrays at both ends can achieve parallel transmission and reception pairs at the expense of some subchannel gains, and thus is an efficient way for enhancing channel capacity in a poor-scattering environment. When cross-polarized antenna combination is used at both ends, both isolation and correlation properties are needed to fully describe the system performance whereas a co-polarized antenna combination scheme can be described by correlation property alone.