Sun Ruoyu, Gentile Camillo A, Senic Jelena, Vouras Peter, Papazian Peter B, Golmie Nada T, Remley Kate A
CableLabs.
National Institute of Standards and Technology.
IEEE Commun Mag. 2018 Dec;56(12). doi: 10.1109/mcom.2018.1800177.
High-gain narrow-beam antennas or beamformed antenna arrays will likely be used in millimeter-wave (mmWave) bands and 5G to mitigate the high path loss. Since many multipath components may be excluded by the narrow beam, the mmWave radio channel (consisting of the transmit antenna, the propagation channels, and the receive antenna) strongly depends on the beamwidth, orientation, and shape of the narrow beam. In this article, a procedure is proposed to measure and model the channels vs. synthetic beamwidth. Based on experimental data collected at 60 GHz in an indoor hallway/lobby scenario, the results show that the number of multipath components and the delay dispersion of the channel are significantly reduced by the narrow beams. In addition, the path loss can be decreased by more than 20 dB with an optimized beam-center orientation. The impact of the study on future 5G mmWave system design is discussed, including frequency reuse, antenna design, receiver design, equalization, and link budget.
高增益窄波束天线或波束赋形天线阵列可能会用于毫米波（mmWave）频段和第五代移动通信技术（5G）中，以减轻高路径损耗。由于窄波束可能会排除许多多径分量，毫米波无线信道（由发射天线、传播信道和接收天线组成）在很大程度上取决于窄波束的波束宽度、方向和形状。在本文中，提出了一种测量信道并针对合成波束宽度进行建模的方法。基于在室内走廊/大厅场景中60吉赫兹收集的实验数据，结果表明窄波束显著减少了多径分量的数量和信道的延迟扩展。此外，通过优化波束中心方向，路径损耗可以降低超过20分贝。讨论了该研究对未来5G毫米波系统设计的影响，包括频率复用、天线设计、接收机设计、均衡和链路预算。
