With the introduction of massive MIMO and directional transmissions, antenna configuration has arisen as a major factor influencing coverage and capacity in fifth generation mobile networks. In particular, mechanical tilting can yield performance advancements that cannot be achieved by purely electronic steering, due to the presence of grating lobes and antenna pattern attenuations. In this letter, the performance of mmWave cellular systems is evaluated in terms of SINR when an adjacent-channel node is interfering with an (UL) transmission. We examine a mobile scenario complete with dynamic (TDD) and highlight how the optimization of the antenna tilt angle can drastically improve the overall network performance. Antenna down-tilt can be properly optimized according to both the environment and the antenna settings, thus reducing the overall interference level. We propose a general methodology and discuss a number of important network considerations, towards an effective optimization of the tilt angle. Our evaluation makes it possible to determine the best tilting configuration to be used, according to the scenario considered.

中文翻译：

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动态 TDD 毫米波蜂窝场景中的倾斜角优化

随着大规模 MIMO 和定向传输的引入，天线配置已成为影响第五代移动网络覆盖范围和容量的主要因素。特别是，由于存在栅瓣和天线方向图衰减，机械倾斜可以产生纯电子转向无法实现的性能提升。在这封信中，当相邻信道节点干扰 (UL) 传输时，根据 SINR 评估毫米波蜂窝系统的性能。我们研究了一个完整的动态 (TDD) 移动场景，并强调了天线倾斜角的优化如何显着提高整体网络性能。可以根据环境和天线设置适当优化天线下倾角，从而降低整体干扰电平。我们提出了一种通用方法并讨论了许多重要的网络注意事项，以实现倾斜角的有效优化。我们的评估可以根据所考虑的场景确定要使用的最佳倾斜配置。