摘要
射线跟踪信道建模方法需要场景的三维矢量数据库,包括场景数据库和可见元(面、劈)数据库。本文提出了一种适用于城市微蜂窝和室内场景的三维矢量数据库建立方法。首先通过简化的三维CAD建模方法建立三维场景模型和数据库,然后使用修正的透视投影法建立视点关于场景的三维可见元数据库,并进一步分析了基于三维可见元数据库的射线跟踪模型计算复杂度。仿真结果表明,该方法能有效地降低射线跟踪信道建模方法的计算复杂度。
3D vector database,including scenario database and visible elements（surface and wedge） database,is essential to ray tracing channel modeling method.In this paper,a method on building 3D vector database for urban microcellular and indoor scenarios is presented.First,a simplified method of 3D CAD modeling is applied in building the 3D models and database of scenarios.Then,a modified perspective projection method is employed to build 3D visible elements database of viewpoint in terms of the scenario.Further the computation complexity of ray tracing model based on visible elements database is analyzed.The simulation results show that the method can efficiently reduce the computation complexity of ray tracing channel modeling method.
出处
《电信科学》
北大核心
2012年第2期110-114,共5页
Telecommunications Science
基金
国家科技重大专项课题基金资助项目(No.2009ZX03007-003-02)
关键词
射线跟踪
场景建模
可见面
矢量数据库
ray tracing
scenario modeling
visible surface
vector database
