Outdoor Experimental Trials on Deployments of Multiple Base Station Antennas for 28 GHz-Band Cooperated Digital Beamforming

5G introduces a beamforming (BF) technology using massive MIMO. In further enhancement of 5G (5G evolution: 5GE), which will be actualized around 2025, performance improvement by digital precoding for hybrid BF and fully digital BF technologies can be expected. In addition, a cooperation technology of multiple base stations (BSs) is required to provide high data rate communications in millimeter wave bands, even when mobile stations (MSs) move at high speed. This paper describes 28 GHz-band experimental equipment that implemented a novel BS cooperation technology combined with digital BF. In outdoor experimental trials, measured downlink throughput is clarified, when three BS antennas are deployed in two kinds of directions and one MS moves at 90 km/h.

[1]  Tatsuki Okuyama,et al.  Outdoor Experimental Trials of 28 GHz Band Base Station Cooperation in High-Mobility Environment of Multiple Mobile Stations , 2021, 2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall).

[2]  Satoshi Suyama,et al.  Two Millimeter-Wave Base Station Cooperation Technologies in High-Mobility Environments for 5G Evolution , 2020, 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring).

[3]  Satoshi Suyama,et al.  28 GHz-Band Experimental Trial at 283 km/h Using the Shinkansen for 5G Evolution , 2020, 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring).

[4]  Yi Jiang,et al.  Performance Evaluation of Downlink Multi-User Massive MIMO with Configurable Active Antenna System and Inter Access Point Coordination in Low-SHF-Band , 2019, IEICE Trans. Commun..

[5]  Satoshi Suyama,et al.  Field Trial of 28GHz Band 5G Downlink Massive MIMO Employing Beam Tracking in Railway Environment , 2019, IEICE Trans. Commun..

[6]  Satoshi Suyama,et al.  Digital Beamforming Algorithm for 5G Low-SHF Band Massive MIMO , 2019, IEICE Trans. Commun..

[7]  Satoshi Suyama,et al.  5G Downlink Throughput Performance of 28 GHz Band Experimental Trial at 300 km/h , 2018, 2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC).

[8]  Il-Gyu Kim,et al.  mmWave-Based Mobile Backhaul Transceiver for High Speed Train Communication Systems , 2017, 2017 IEEE Globecom Workshops (GC Wkshps).

[9]  Xin Wang,et al.  Ultra-high-throughput massive MIMO field-trial over radio computing architecture with peak spectrum efficiency of 79.82 bps/Hz , 2017, 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC).

[10]  Satoshi Suyama,et al.  Joint Processing of Analog Fixed Beamforming and CSI-Based Precoding for Super High Bit Rate Massive MIMO Transmission Using Higher Frequency Bands , 2015, IEICE Trans. Commun..

[11]  Md Saifur Rahman,et al.  Multi-user MIMO strategies for a millimeter wave communication system using hybrid beam-forming , 2015, 2015 IEEE International Conference on Communications (ICC).

[12]  Akbar M. Sayeed,et al.  Beamspace MIMO for Millimeter-Wave Communications: System Architecture, Modeling, Analysis, and Measurements , 2013, IEEE Transactions on Antennas and Propagation.

[13]  Robert W. Heath,et al.  Low complexity precoding for large millimeter wave MIMO systems , 2012, 2012 IEEE International Conference on Communications (ICC).

[14]  Matthew R. McKay,et al.  Eigen-Based Transceivers for the MIMO Broadcast Channel With Semi-Orthogonal User Selection , 2010, IEEE Transactions on Signal Processing.

[15]  Norihiko Morinaga,et al.  Directive antenna diversity reception for an adaptive modulation system in land mobile communications , 1995 .

[16]  Satoshi SUYAMA,et al.  Base Station Cooperation Technologies Using 28GHz-Band Digital Beamforming in High-Mobility Environments , 2021, IEICE Trans. Commun..