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.
翻译:本文展示了LuMaMI28, 一个实时的28千兆赫大规模多输出多输出输出(MIMO)测试台。 在这个测试台, 基地台有16个收发器链, 配有全数字波形结构( 不同的预编码算法), 同时支持多个用户设备( UES), 带有空间多轴 。 UES 配备了一个可波束开天线阵列, 用于实时选择天线, 其中选择了在四个预设的波束中具有最高信道级的天线。 对于波束可控天线阵列, 我们考虑两种UE天线, 配有不同的波形波形和峰值。 基于这个测试台, 我们提供毫米波状( mmWave) 大型IMO 性能的测量结果, 用静态和移动电动电动电动电波进行测量。 我们根据测量的频道数据, 探索使用天线选择的大型MIMIMO系统的潜在好处, 并讨论实时测量结果 。