论文标题
4和14 GHz处的室外多径通道的射线访问模拟
Ray-Optics Simulations of Outdoor-to-Indoor Multipath Channels at 4 and 14 GHz
论文作者
论文摘要
基于射线光近似的无线电波传播模拟在覆盖范围分析中广泛采用，包括一系列情况，包括室外场景。这项工作介绍了O2I射线追踪模拟，利用一个完整的办公楼建筑平面图以激光扫描的点云的形式进行。就路径丢失，延迟和角扩散而言，将模拟的无线电通道与其在4和14 GHz处的测量对应物进行了比较。验证O2i案例的通道模拟很少见，到目前为止，不存在以上$ 6 $ 〜GHz频段。这项工作揭示了平面图准确模拟通道的重要性。可以证实，可以用简单的内部路径损耗模型代替详细的建筑内部模型来复制路径损失，但忽略了建模内部的内部模型会导致高延迟和角度扩散误差。通过对内部建模，射线追踪模拟的相对平均误差的相对平均误差为延迟和角度扩散的相对平均误差。最后，报告了多层绝缘窗口对传播模拟的影响。渗透损失在繁殖路径的入射角度的小变化上的明显变化会导致估计覆盖率发生巨大变化。
Radio wave propagation simulations based on the ray-optical approximation have been widely adopted in coverage analysis for a range of situations, including the outdoor-to-indoor scenario. This work presents O2I ray-tracing simulations utilizing a complete office building floor plan in the form of a laser-scanned point cloud. The simulated radio channels are compared to their measured counterparts at 4 and 14 GHz in terms of path loss and delay and angular spreads. Validation of channel simulations for the O2I case is rare, and so far non-existent for above-$6$~GHz bands. This work reveals the importance of a floor plan model in accurately simulating the channel; it is confirmed that path loss can be replicated with a simple interior path loss model in place of a detailed building interior model, but neglecting to model the interior results in high delay and angular spread errors. By modeling the interior, the ray-tracing simulations achieve relative mean error of under 10% for delay and angular spreads. Finally, effects of multi-layer insulating window on propagation simulations are reported. Noticeable variation of the penetration loss on a small change of the incident angle of a propagation path causes large changes in estimated coverage.
