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Experimental Investigation of Space Division Multiplexing on Massive Antenna Systems for Wireless Entrance
Kazuki MARUTA Atsushi OHTA Satoshi KUROSAKI Takuto ARAI Masataka IIZUKA
IEICE TRANSACTIONS on Communications
Publication Date: 2017/08/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
Category: Antennas and Propagation
massive MIMO, multiuser MIMO, channel measurement, line-of-sight propagation, inter-user interference cancellation, spatial correlation,
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This paper experimentally verifies the potential of higher order space division multiplexing in line-of-sight (LOS) channels for multiuser massive MIMO. We previously proposed an inter-user interference (IUI) cancellation scheme and a simplified user scheduling method for Massive Antenna Systems for Wireless Entrance (MAS-WE). In order to verify the effectiveness of the proposed techniques, channel state information (CSI) for a 1×32 SIMO channel is measured in a real propagation environment with simplified test equipment. Evaluations of the measured CSI data confirm the effectiveness of our proposals; they offer good equal gain transmission (EGT) performance, reduced spatial correlation with enlarged angular gap between users, and quite small channel state fluctuation. Link level simulations elucidate that the simple IUI cancellation method is stable in practical conditions. The degradation in symbol error rate with the measured CSI, relative to that yielded by the output of the theoretical LOS channel model, is insignificant.