标题： 毫米波系统中空间一致信道对数字波束成形的影响 显示英文标题

标题： Impact of Spatially Consistent Channels on Digital Beamforming for Millimeter-Wave Systems

摘要： 大规模多输入多输出（MIMO）的前提是基于相干传输和检测。大多数关于大规模MIMO的大量文献都在简化的统计传播模型上进行性能评估。所有这些模型都是基于下降的，并不能保证信道参数的连续性。在本文中，我们量化了空间一致（SC）模型对大规模MIMO系统波束成形的影响。我们关注的是28GHz多用户城市微小区场景的下行链路。使用最近标准化的第三代合作伙伴计划38.901 SC-I过程，我们评估了用户设备的信噪比以及系统遍历总频谱效率，采用零 forcing、块对角化和信号泄漏比波束成形。我们的结果表明，在实际信噪比水平下，由于信道参数之间的显著空间相关性，SC信道相对于无SC的情况会导致显著的性能损失。 显示英文摘要

摘要： The premise of massive multiple-input multiple-output (MIMO) is based around coherent transmission and detection. Majority of the vast literature on massive MIMO presents performance evaluations over simplified statistical propagation models. All such models are drop-based and do not ensure continuity of channel parameters. In this paper, we quantify the impact of spatially consistent (SC) models on beamforming for massive MIMO systems. We focus on the downlink of a 28GHz multiuser urban microcellular scenario. Using the recently standardized Third Generation Partnership Project 38.901 SC-I procedure, we evaluate the signal-to-interference-plus-noise ratio of a user equipment and the system ergodic sum spectral efficiency with zero-forcing, block diagonalization, and signal-to-leakage-plus-noise ratio beamforming. Our results disclose that at practical signal-to-noise ratio levels, SC channels yield a significant performance loss relative to the case without SC due to substantial spatial correlation across the channel parameters.