Performance of Spatial Multiplexing and Transmit Diversity in Multi-Polarized MIMO Transmissions with Receive Antenna Selection

In this work, we consider the use of multiple antenna signaling technologies, specifically space-time block coding (STBC) and spatial multiplexing (SM) schemes, in multiple-input multiple-output (MIMO) communication systems employing dual polarized antennas at both ends. The use of dual-polarized antennas theoretically double the number of virtual antennas used in the system. On the other hand, the correlation effects and the cross-polar discrimination (XPD) deteriorates the system performance. In our work, we consider these effects and present model of a 3× 3 system with triple-polarized antennas for both STBC and SM cases. We also present simulation results for both multi-antenna signaling techniques together with hybrid approaches under various XPD and correlation scenarios. The simulation results show a significant performance gain by joint utilization of space, time and polarization diversity in comparison to uni-polarized systems with the same number of antennas. We observed that dual and triple polarized systems have different performances at various channel scenarios. Antenna selection performs better for systems with space time coding and boosts the performance more in triple-polarized MIMO compared to its dual-polarized counterpart. Keywords-Antenna selection, XPD, space-time coding, spatial multiplexing, dual polarization, triple polarization, polarization diversity.