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

Abstract

This paper presents LuMaMi28, a real-time 28 GHz massive 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) massive MIMO performance in different real-life scenarios with static and mobile UEs. We explore the potential benefit of the mmWave massive MIMO systems with antenna selection based on measured channel data, and discuss the performance results through real-time measurements.

arXiv comment14 pages, 17 figures

References in corpus (6)

• Spatially Sparse Precoding in Millimeter Wave MIMO Systems
• Channel Estimation and Hybrid Precoding for Millimeter Wave Cellular Systems
• Millimeter Wave Beamforming for Wireless Backhaul and Access in Small Cell Networks
• Small-Scale, Local Area, and Transitional Millimeter Wave Propagation for 5G Communications
• RF Lens-Embedded Massive MIMO Systems: Fabrication Issues and Codebook Design
• Hybrid RF and Digital Beamformer for Cellular Networks: Algorithms, Microwave Architectures and Measurements