Experimental Investigation of Space Division Multiplexing on Massive Antenna Systems

This paper experimentally verifies the potential of higher order space division multiplexing for multiuser massive MIMO in line-of-sight (LOS) channels. We previously proposed an inter-user interference (IUI) cancellation scheme and simplified user scheduling method on Massive Antenna Systems for Wireless Entrance (MAS-WE). In order to verify the effectiveness of the proposed techniques, channel state information (CSI) for a 1x32 SIMO channel is measured in a real propagation environment with simplified test equipment. System level simulations using the measured CSI confirm that enlarging the angular gap between users reduces spatial correlation, and that the IUI cancellation proposal is effective under this condition. The degradation in SIR compared to ideal LOS channel model case is insignificant.