Geometrical Model for Point-to-Point Multi-Polarized Massive MIMO Systems

In massive MIMO systems, a large number of antennas are difficult to be placed in a limited space, and the antenna space limitation causes a high spatial correlation between the antennas, furthering causes systems performance degradation. In this paper, we implement the multi-polarized antennas in point-to-point massive MIMO systems to reduce the correlation between antennas to enhance the systems performance and realize the space efficiency. Also we establish a 3-D geometrical channel model for the proposed point-to-point multi-polarized massive MIMO systems. The channel is modeled as a Ricean fading channel and the average correlation for the whole systems is defined to indicate the correlation degree of the systems. We compare the performance of multi-polarized massive MIMO systems with uni-polarized massive MIMO systems in different communication scenarios. The achieved results demonstrate that the multi-polarized massive MIMO systems have better performance compared to the uni-polarized massive MIMO systems in many situations.