城市微蜂窝通信中场强预测的一种方法

提出了基于几何光学和统一绕射理论城市微蜂窝通信中的信号传播模型，使用射线跟踪技术，考察了跟踪过程中射线在墙面和地面的反射及射线在建筑物拐角处的绕射，反射线和绕射线的场强在本地射线基坐标系下计算，得出接收点收信号的总场强和路径损耗，将模型计算结果与有关文献上测量数据进行了比较，结果表明，路径损耗的计算误差在１０ｄＢ以内。

A New Method for Field Strength Prediction in Urban Microcell Communications

A simple signals spreading model in urban microcell communication enviroments is presented.The model is based on geometrical optics and uniform theory of diffraction.Raytracing technologies is used in the model, both reflection and diffraction rays is considered.The field strength of reflection and diffraction rays is calculated in the local ray fixed coordinate systems to obtain the total field and pathloss of signals site.The calculated results of the signal path loss along the streets are compared with the published experimental results, showing that the model can predict signal strenths in these environments with good agreement.