Indoor Experimental Trial on Hybrid 16-Beam Spatial-Multiplexing for High SHF Wide-Band Massive MIMO in 5G

Recently, the fifth-generation mobile communications system (5G) in higher frequency bands has been extensively studied. Massive MIMO is one of the promising technologies to dramatically increase spectral efficiency. The authors have been engaged on R&D into wideband massive MIMO and beam control technologies for high SHF bands. Recently we have developed a massive MIMO system capable of supporting 16-beam transmission at a 28GHz band and have conducted its experimental trial. In this paper, we present recent indoor experimental trial results using 16-beam spatial multiplexing at 28GHz with 500MHz bandwidth. For a single-user MIMO scenario, it has been verified that the downlink throughput of 25.5 Gbps is reached in the anechoic chamber.

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