论文标题
毫米波大量的MIMO测试与混合光束成形
Millimeter-Wave Massive MIMO Testbed with Hybrid Beamforming
论文作者
论文摘要
大量的多输入多重输出（MIMO）技术在毫米波（MMWave）频段中至关重要，以获得大型阵列增长。但是，存在实际的挑战，例如此类系统中的高硬件成本和功耗。解决这些问题的一个有前途的解决方案是采用混合波束形成架构。该体系结构的收发器链数（TRX）链的数量要比总天线数低得多，从而产生了成本和节能系统。在本文中，我们提出了一个实时mmmwave（28 GHz）的大量MIMO测试，并带有混合光束形成。该测试床具有用于光束选择的64-安特纳/16-TRX单元，可以以模块化的方式扩展到较大的阵列大小。为了测试从基带处理算法到实际传播环境中的调度和光束选择的所有内容，我们扩展了现有的100-Antenna/100-Trx大型MIMO TESTBED（低于6 GHz）的能力（在6 GHz以下），建立在软件定义的无线电技术基础上，以灵活的mmwave mmwave massive mimo system。
Massive multiple-input multiple-out (MIMO) technology is vital in millimeter-wave (mmWave) bands to obtain large array gains. However, there are practical challenges, such as high hardware cost and power consumption in such systems. A promising solution to these problems is to adopt a hybrid beamforming architecture. This architecture has a much lower number of transceiver (TRx) chains than the total antenna number, resulting in cost- and energy-efficient systems. In this paper, we present a real-time mmWave (28 GHz) massive MIMO testbed with hybrid beamforming. This testbed has a 64-antenna/16-TRx unit for beam-selection, which can be expanded to larger array sizes in a modular way. For testing everything from baseband processing algorithms to scheduling and beam-selection in real propagation environments, we extend the capability of an existing 100-antenna/100-TRx massive MIMO testbed (below 6 GHz), built upon software-defined radio technology, to a flexible mmWave massive MIMO system.
