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Novel SDMA system adopting spatial and polarization control with terminal polarization assignment

This paper proposes a novel space division multiple access system that comprises base station smart antennas and mobile terminals employing a dual-polarized antenna. The smart antennas adaptively control radiation patterns and polarization using a dual-polarized antenna array. Each mobile terminal communicates with the base station by assigning polarization to minimize the interference caused by the other mobile terminals. The simulation results indicate that the proposed system is advantageous in a large capacity cellular environment. Furthermore, we measured vertically- and horizontally-polarized propagation in an urban environment to confirm the actual performance of the proposed system.