摘要
由于目前对下一代移动通信的备选频段——室外3.5 GHz电波传播特性的研究还很少,基于此,应用射线跟踪法对室外3.5 GHz频段的电波传播特性进行了研究。介绍了城市微小区中的电波传播机制、射线跟踪法的基本原理和几种常用的射线跟踪方法,并在3.5 GHz对街道拐角绕射、发射天线的高度对传播特性的影响以及3.5 GHz的功率时延特性进行了研究,得出了路径损耗与建筑物的分布及街道宽度有关以及对发射天线高度不是很敏感的结论。
There are not many researches on the characteristics in outdoor environment at 3. 5 GHz, which is one of alternative frequency bands for mobile communications of next generation, radio propagation characteristics at 3.5 GHz in outdoor environment are studied by the ray- tracing method. The microcellular radio propagation mechanism, basic principles of ray-tracing method and several ray - tracing methods are introduced. Influence of the street corner diffraction and the height of an tenna on the propagation characteristics are researched. And a study of power - delay profile at 3.5 GHz is presented. Finally it＇s found that path loss is relative to the distribution of the constructions and width of the streets. As a consequence, path loss is not sensitive to the height of the transmitters.
出处
《现代电子技术》
2009年第21期63-66,共4页
Modern Electronics Technique
基金
上海市重大科研攻关项目"新一代网络通信关键技术研发和集成测试环境建设"(07dz15006)
关键词
射线跟踪法
电波传播模型
镜像源
微小区
ray - tracing method
radio propagation model
mirror image source
microeellular
