计算机技术与发展Issue(10)：115-118,122,5.DOI:10.3969/j.issn.1673-629X.2015.10.025
城市微蜂窝环境下移动通信的传播特性研究
Research on Mobile Communication Propagation Characteristics for Urban Micro-cellular Environment
摘要
Abstract
As the rapid development of the mobile communication technology and its application in recent years,the propagation charac-teristics for urban area have become an important subject. For the explosive growth of mobile communication,mobile communication sys-tems are increasingly unable to meet the needs for people. The micro-cellular technology,due to the advantage of low transmitting pow-er,the short distance of frequency reuse and so on,has become the primary mean to improve the channel capacity. Firstly,the mobile communication propagation characteristics in outdoor environment are simulated and analyzed using the method of SBR/IM ( Shooting and Bounding Ray tracing/Image) in this paper. And it is agreed well by a comparison of simulated results and measured results. Then, through simulating irregular outdoor practical scene,can get the path loss under different circumstances and study various factors on the impact of path loss to analyze radio wave propagation in urban micro-cellular environment. Finally,some conclusions are obtained by simulation:a comprehensive model must consider the contribution of diffraction;the appropriate category and the number of rays can re-duce the running time;the influences from the height of the base station antennas to the path loss are different between non-visible area and the visible area. The simulation system is simplified,ignoring the impact of trees,the moving body on the road as well as the rough-ness of various buildings’ surface. The study provides the theoretical foundation to simplify for outdoor propagation model and benefits the base station planning and optimization of urban micro-cellular environment.关键词
SBR/IM/非规则室外/城市微蜂窝/路径损耗Key words
SBR/IM/irregular outdoor/urban micro-cellular/path loss分类
信息技术与安全科学引用本文复制引用
陈枫,刘芫健..城市微蜂窝环境下移动通信的传播特性研究[J].计算机技术与发展,2015,(10):115-118,122,5.基金项目
国家自然科学基金资助项目(60671065) （60671065）
教育部博士点基金(20123223120003) （20123223120003）
