这就需要建立一种精确的电波传播预测模型来分析微小区的电波传播。
Therefore a new accurate prediction model must be established to analyze the radio propagation in microcellular.
在传统的电波传播预测模型的基础上，提出了一种基于射线跟踪法的改进模型。
An improved ray-tracing model based on traditional microwave propagation prediction models is presented.
提出了一种有效的微蜂窝电波传播预测模型，该模型基于射线跟踪法和UTD理论，并使用辐射源树的方法。
This paper presents an effective radio wave propagation prediction model by using radiation sources tree for microcellular environment. This model is based on ray-tracing and UTD.
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