AI 中文总结
该研究针对城市环境的地面到非地面通信，开发了基于终端高度和仰角的增强型3GPP信道模型，经Sionna射线追踪验证，可无缝集成至仿真工具，性能优于现有模型。
AI 中文摘要
我们开发了适用于城市环境中地面到非地面（NTN）通信的大规模信道参数增强模型，用于支持无人机等地面以上的设备。这些模型被构建为终端离地高度和仰角的函数，适用于S波段和Ka波段频率。为确保模型的真实性，我们使用开源3D场景生成器创建了欧洲各地多样化的城市场景，并采用Sionna射线追踪生成室外终端的路径增益样本，覆盖高度范围达300米、仰角范围达90°。我们提出的解析函数与射线追踪数据在视距（LOS）概率、阴影衰落（SF）和杂波损耗（CL）方面表现出极佳的一致性。此外，与现有3GPP模型的耦合增益对比分析显示，存在显著差异，尤其是本模型的杂波损耗更小、视距概率更高。这些模型设计为易于使用，可无缝集成到仿真工具中，为研究人员和工程师提供实用解决方案。
英文摘要
We have developed enhanced models for large-scale channel parameters intended for terrestrial-to-non-terrestrial (NTN) communication in Urban environments for supporting devices above ground levels, such as drones. The models are formulated as functions of terminal height above ground and elevation angle, applicable to S-Band and Ka-Band frequencies. To ensure realistic models, an open-source 3D scene generator was utilized to create a diverse set of urban scenes across Europe. Sionna ray-tracing was employed to generate path-gain samples for outdoor terminals, covering a range of heights up to 300 meters and elevation angles up to 90°. Our proposed analytical functions show excellent agreement to ray-tracing data for line-of-sight (LOS) probability, shadow-fading (SF), and clutter-loss (CL). Furthermore, a comparative coupling gain analysis with existing 3GPP models reveals notable differences, particularly caused by smaller CL and higher LOS probabilities from proposed models. Designed for ease of use, these models can be seamlessly integrated into simulation tools, offering a practical solution for researchers and engineers.
