室外微蜂窝小区3.5GHz电波传播特性仿真和分析

Simulation and Analysis of 3.5GHz Radio Wave Propagation Characteristics of Outdoor Microcell Environment

射线跟踪方法是研究室外微蜂窝小区电波传播的有效方法。基于入射及反弹射线法/镜像法对室外微小区环境中3.5GHz电波传播的路径损耗进行了仿真和分析,仿真结果与文献所给的结果一致性良好,验证了该方法的正确性。提出了一种新型的射线管判收方法,可有效判断到达接收机的所有射线管。分析了仿真中得到的接收功率、均方根时延扩展、波达方向等传播参数,并比较了视距传播(LOS)和非视距传播(NLOS)的传播特性,这些分析结果可为3.5GHz频段无线通信系统的覆盖提供相应的理论依据。

The ray tracing method is a practical approach to study the radio wave propagation in outdoor microcell environments. In this paper,the propagation characteristics of outdoor microcell environment at 3. 5GHz are simulated and analyzed by using the method of SBR / Image( shooting and bounding ray tracing / image). And it is agreed well by a comparison of simulated results and results in the literature,so the correctness of the method has been validated. A novel method which can effectively determine all ray tubes that reached receivers is presented in this paper. And some propagation parameters are obtained in the simulation,such as the 3- D received power,RMS( root mean square) delay spread,direction of arrival,and so on. These propagation parameters on the condition of LOS( line-of-sight) and NLOS( none-line-of-sight) have been compared in this paper. The analysis of the above results provides the theoretical foundation for outdoor microcell at 3.5GHz radio wave communication system.