LuMaMi28: Real-Time Millimeter-Wave Multi-User MIMO Systems with Antenna Selection

This paper presents LuMaMi28, a real-time 28GHz multi-user (MU) multiple-input multiple-output (MIMO) testbed. In this testbed, the base station has 16 transceiver chains with a fully-digital beamforming architecture (with different pre-coding algorithms) and simultaneously supports multiple user eq...

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Veröffentlicht in:	IEEE transactions on wireless communications 2023-11, Vol.22 (11), p.1-1
Hauptverfasser:	Chung, MinKeun, Liu, Liang, Johansson, Andreas, Willhammar, Sara, Nilsson, Martin, Ying, Zhinong, Zander, Olof, Samanta, Kamal, Clifton, Chris, Koimori, Toshiyuki, Morita, Shinya, Taniguchi, Satoshi, Tufvesson, Fredrik, Edfors, Ove
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Antenna arrays Antenna measurements Antenna selection Antennas Array signal processing Beamforming Communication Systems Electrical Engineering, Electronic Engineering, Information Engineering Elektroteknik och elektronik Engineering and Technology Kommunikationssystem Millimeter wave communication Millimeter waves millimeter-wave (mmWave) MIMO communication multi-user multiple-input multiple-out (MU-MIMO) Multiplexing OFDM Real time Real-time systems real-time testbed Teknik Test stands Time measurement
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Zusammenfassung:	This paper presents LuMaMi28, a real-time 28GHz multi-user (MU) multiple-input multiple-output (MIMO) testbed. In this testbed, the base station has 16 transceiver chains with a fully-digital beamforming architecture (with different pre-coding algorithms) and simultaneously supports multiple user equipments (UEs) with spatial multiplexing. The UEs are equipped with a beam-switchable antenna array for real-time antenna selection where the one with the highest channel magnitude, out of four pre-defined beams, is selected. For the beam-switchable antenna array, we consider two kinds of UE antennas, with different beam-width and different peak-gain. Based on this testbed, we provide measurement results for millimeter-wave (mmWave) MU-MIMO performance in different real-life scenarios with static and mobile UEs. We explore the potential benefit of the mmWave MU-MIMO systems with antenna selection based on measured channel data, and discuss the performance results through real-time measurements.
ISSN:	1536-1276 1558-2248
DOI:	10.1109/TWC.2023.3257195