摘要
随着移动用户数量的不断增加,小区的范围越来越小。由于小区之间的统计相似性消失,对电波传播特性进行预测的传统方法已不再适用。考虑了直射、反射和绕射等不同的传播机制,运用三维射线跟踪算法对某微小区的场强及信道容量等传播特性进行研究。根据射线跟踪方法得到多径信息,计算出场强及SISO系统、MIMO系统的信道容量,进一步进行了可视化。通过可视化,一方面使场强与容量的覆盖范围更直观;另一方面,可通过交互操作观察在改变仿真参数时场强和容量分布的变化,更利于对两种系统进行对比。
With the increase of mobile users,the coverage of a cell is becoming smaller and smaller.Under this circumstance,the statistical similarity disappeared,so the traditional methods to predict the electromagnetic wave propagation characteristics are not suitable.Therefore,a simulation of the electromagnetic wave propagation characteristics（field intensity and capacity,etc）in microcell environment is proposed using 3D ray tracing method,from the aspects of different transmission mechanisms,such as the direct-way,reflection,diffraction and so on.According to the multipath information,the field intensity and capacity of SISO system and MIMO system are calculated,and the simulation results are visualized.On one hand,visualization makes the field intensity and capacity distribution vividly,on the other hand,it allows users to observe the variation of the field intensity distribution and the channel capacity distribution with some environment parameters,which makes it more convenient to compare these two systems.
出处
《电子测量技术》
2011年第12期58-61,共4页
Electronic Measurement Technology
基金
国家科技重大专项项目(2009ZX03007-003-02)
国家基础研究项目(2007CB310605)
关键词
电波传播机制
射线跟踪
场强
信道容量
可视化
propagation mechanismns
ray-tracing
field intensity
channel capacity
visualization
