关键词: 射线跟踪, 数字地图, 自动提取, 预处理技术, 城市微小区

Abstract:

In view of the fact that the digital map of the urban microcellular is important to the ray tracing algorithm for mobile communications,the characteristic of the quasi three-dimension ray-tracing algorithm has been taken into account.The technology of extracting geometrical information of buildings and preprocessing the digital map has been found.This technology can extract geometrical information of buildings with high precision and speed,and contribute to eliminating geometrical factors that matter very little to prediction results.Therefore,a microcellular wave propagation prediction model with the advantages of practicality,high speed and high accuracy.Thus,the accuracy and efficiency of the microcellular wave propagation prediction model has been improved.

Key words: ray tracing;digital map;auto extraction;preprocessing technology;urban microcellular