无人机测控链路信道传播损耗模型研究

无人机测控链路的稳定可靠是确保无人机充分发挥军事和民用效能的重要保证之一。针对无人机测控链路系统设计中的空间传播损耗精确计算问题，参考ITU-R（国际电信联盟无线电通信组）P.528传播损耗模型，从自由空间损耗、大气吸收损耗和可变损耗三个方面进行了仿真研究，获得了视距条件下三种损耗衰减值与传播频率、通信距离、通信终端高度等参数的一般关系。根据提出的传播损耗精确计算方法，对某无人机典型应用场景下的传播损耗进行了分析计算。与传统损耗模型的计算结果相比，采用的方法可以获得更加精确的计算结果，对无人机测控装备的设计研制具有重要的借鉴意义。

The research on propagation loss model in the design of UAV data link

The stability and reliability of UAV data link is one of the important guarantees to ensure the full play of military and civilian effectiveness. Aiming at the propagation loss in the design of a UAV data link, free space loss, atmospheric absorption loss, and variability loss were studied in this paper based on the ITU-R P.528 model. The relationship between loss values and frequency, distance, and height was obtained. According to the propagation loss calculation method proposed in this paper, the propagation loss in typical UAV application scenarios is calculated and analyzed. Compared with the traditional calculation model, the present method can obtain more accurate results, which is important for the development of UAV data link equipment.