电波传播抛物方程模型在航空通信中的应用

针对航空通信中电波传播损耗预测需要满足精确性、实时性及复杂环境适应性的要求，在分析电波传播损耗对航空通信系统作用范围的影响基础上，采用抛物方程模型研究了航空通信中电波在空间区域的传播特性。该模型利用分步傅里叶算法实现快速求解，采用边界平移法处理复杂地形边界，并通过非均匀网格技术提高空间任意一点的场强计算精度，从而改善了复杂环境下电波传播损耗预测的精确性和实时性。将该模型应用于真实地形环境下的航空通信仿真算例中，仿真结果表明：该模型能有效预测复杂环境下电波的传播损耗，评估在正常通信条件下飞行器的飞行范围、最大飞行距离以及最低飞行高度等性能。

Application of wave propagation model based on parabolic equation in aeronautical communication

The parabolic equation(PE) model is used to predict the wave propagation characteristics for the demands of accuracy,timeliness and environmental complexity in aeronautical communication.The influence of propagation loss on the aeronautical communication range is analyzed.The split-step Fourier transform(SSFT) technology is used to solve the PE,boundary shift method is used to deal with the complex terrain,and un-uniform grid technology is used to advance the precision of the field at any point in space.The model is applied to aeronautical communication simulations in the real terrain environment.Numerical simulations demonstrate this model can predict wave propagation loss in complex environment correctly,and evaluate the flight range,the farthest flight distance and the lowest flight height effectively in normal communication.