The mountain scene has a large altitude difference

and the terrain is undulating and obstructed.The electromagnetic propagation environment is complex.Compared with the traditional SPM propagation model the 3 D ray tracing model better reflects the reflection

diffraction and diffraction of electromagnetic propagation.And the model parameters of 3 D ray tracing are more abundant.Therefore

it will be more accurate and reasonable.This article mainly conducts CW testing in a mountain scene in Yunnan.Use the3 D ray tracing propagation model for model calibration and analyze the results of model calibration.It can be seen that it is reasonable and feasible to use 3 D ray tracing propagation model in mountain scenes.