反向射线跟踪的三维路径搜索方法

Efficient 3D path searching method for the inverse ray-tracing

移动通信基站电磁波传播预测在移动通信网络设计和电磁辐射环境影响评价中起着关键性作用。反向射线跟踪方法是解决这一问题的有效方法。介绍了反向射线跟踪的三维路径搜索方法,这种搜索方法建立在三维模型数据信息的基础之上,方便,快捷。首先,建立环境小区的三维建筑物模型;其次,运用本文所介绍的三维路径搜索方法,找出电波精确的传播路径,对每一条路径计算接收点场强,叠加得出总场强;最后用软件实现场强预测系统,并用实验验证预测模型的准确性。

The propagation prediction for mobile communication base station plays a key role in the design of mobile communication network and the environmental impact assessment of electromagnetic radiation. The reverse ray-tracing method is an efficient method for resolving the problem. This paper discusses in detail the efficient 3D method for the inverse ray-tracing. This method is on the basis of the data of the three-dimensional building model, it is easy and convenient. Firstly, it created three-dimensional environmental community building model. Secondly, it used the efficient 3D method to find the exact propagation paths, then calculates the receiver field strength of each path and accumulates to get the total diffraction field strength. Finaly, it compares the value calculated with the field strength prediction software system and the measured value to verify the accuracy of this field strength prediction system.