Correlation-based user scheduling and multi-planar parallelogram array for Massive antenna systems

This paper proposes a simplified user scheduling method suitable for our proposed antenna arrangement and an antenna configuration with multi-planar antennas, for Massive MIMO. Massive MIMO has two key problems: the heavy overhead of feeding back the channel state information (CSI) for the very large number of transmission/reception antenna element pairs and the huge computation complexity imposed by the very large scale matrices. We previously proposed a parallelogram planar array (PPA) arrangement for Massive MIMO to realize channel spatial correlation reduction in LOS environments. Assuming that the proposed array is to cover omnidirectional areas, this paper proposes a user scheduling method that can easily enhance outage capacity performance in a simple manner and an antenna configuration that offers more efficient user accommodation. Simulations show that the proposed method can quadruple the system capacity over the uniform circular array antenna system.