This letter presents an analysis of channel characteristics for an outdoor scenario at the frequency band of 28–30 GHz. A geometry-based clustering algorithm is proposed to group the measured multipath components (MPCs) from the interaction points on the surrounding walls or objects according to ray-tracing three-dimensional (3-D) simulations, giving results that are more physically interpretable than the traditional clustering algorithms. The cluster-level characteristics at 15 positions along a predefined route covering both line-of-sight (LoS) and non-LoS (NLoS) scenarios are investigated. Moreover, power contributions of MPCs with multiple bounces (up to seven bounces in NLoS scenario) from the interaction objects are also investigated.

中文翻译：

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28、30 GHz 室外测量的基于几何的聚类特性


这封信介绍了 28-30 GHz 频段室外场景的信道特性分析。提出了一种基于几何的聚类算法，根据光线追踪三维 (3-D) 模拟，对来自周围墙壁或物体上的相互作用点的测量多径分量 (MPC) 进行分组，给出的结果在物理上更易于解释传统的聚类算法。研究了覆盖视距 (LoS) 和非 LoS (NLoS) 场景的预定义路线上 15 个位置的集群级特征。此外，还研究了来自交互对象的多次反弹（NLoS 场景中最多七次反弹）的 MPC 的功率贡献。