一种地空高速通信链路传播损耗计算方法

Propagation-Loss Calculation of Ground-to-air High-speed Communication Link

地空高速通信链路已广泛使用X、Ku、Ka等频段,对气象因素影响敏感,而系统链路预算时需综合考虑各种因素的影响。参考ITU链路模型,对链路传播损耗中的自由空间损耗、大气衰减、雨雪衰减等计算方法进行详细的阐述和仿真计算,给出了典型场景下衰减与频率、距离的一般关系,提出了一种工程实现上较为可靠的计算方法,并对西安地区典型场景下的传输损耗进行分析,其图中数据可直接用于简单的链路估算。

Ground-to-air high-speed communication links are widely used in X/Ku/Ka bands, and for its sensitiveness to meteorological factors, the system link budget should comprehensively consider the impacts of various factors. Based on the ITU link model, the calculation methods of free space loss, atmospheric attenuation, rain and snow attenuation in propagation loss are discussed and simulated, the general relationships of between attenuation and frequency and distance in typical scenario given, and a fairly reliable calculation method in engineering implementation also proposed. The transmission loss under typical scenario in Xi＇an area is analyzed, and the data here can be directly used for simple link estimation.