Existing studies of the ultraviolet (UV) channel mainly focus on non-line-of-sight (NLOS) scenarios, while line-of-sight (LOS) scenarios are generally neglected since obstacles sometimes block them. To fill this gap, a UV diffused-LOS channel model in the presence of an obstacle is proposed for the first time, to the best of our knowledge. For easy interpretation, the whole derivation is combined with four typical positions of the obstacle. Moreover, the applicability of the proposed model is investigated via comparison with the classical Monte Carlo simulation model, where the transceiver elevation angle and azimuth angle are always kept optimal. Calculation and simulation results show that when the obstacle thickness is relatively small, the channel attenuation of the UV diffused-LOS system is lower than that of the UV NLOS system with the variation of obstacle width, height, and distance between transceiver and obstacle. In addition, an expression of the impulse response time of the diffused-LOS channel with the obstacle is also derived for tractable analysis.

中文翻译：

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包含障碍物的紫外漫射LOS通信信道建模及其适用性分析

现有对紫外线 (UV) 通道的研究主要集中在非视线 (NLOS) 场景，而视线 (LOS) 场景通常被忽略，因为有时障碍物会阻挡它们。为了填补这一空白，据我们所知，首次提出了存在障碍物时的 UV 漫反射 LOS 通道模型。为了便于解释，整个推导结合了障碍物的四个典型位置。此外，通过与收发器仰角和方位角始终保持最佳的经典蒙特卡罗仿真模型进行比较，研究了所提出模型的适用性。计算和仿真结果表明，当障碍物厚度较小时，随着障碍物宽度、高度以及收发器与障碍物之间距离的变化，UV漫射LOS系统的信道衰减低于UV NLOS系统。此外，还导出了具有障碍物的扩散LOS信道的脉冲响应时间表达式，用于易处理分析。