3G LTE空间信道模型的三维修正及容量分析
Three-dimensional correction and capacity analysis on 3G LTE spatial channel model
杨雪 1金志刚 1陈喆2
作者信息
- 1. 天津大学电子信息工程学院,天津300072
- 2. 天津大学电子信息工程学院,天津300072;工业和信息化部电信研究院,北京100191
- 折叠
摘要
空间信道模型SCM (Spatial Channel Model)是3GPP用于LTE系统仿真的MIMO二维信道模型.本文在SCM模型的基础上,综合考虑基站端和移动台端电波的离开角和到达角的三维特性,给出了三维MIMO信道模型的信道参数描述,提升了信道建模的准确度,并推导出该信道模型下包含极化特性的MIMO信道系数表达式.同时探究了天线间距、水平角扩展、俯仰角扩展等对MIMO信道空时相关性的影响.研究结果显示,随着俯仰角扩展从0°到60°增大,散射环境越来越强,信号在空间的色散度越高,不同天线单元接收到的信号之间的相关性越小,信道容量将会越大.
Abstract
Spatial channel model is a MIMO channel model of the 3GPP LTE system for the two-dimensional simulation.Our work based on the SCM model,considering the three-dimensional features of electromagnetic angles of departure and angles of arrival,describes the three-dimensional MIMO channel model and channel parameters,improve the accuracy of the channel model,and deduced the channel model coefficient expressions under using polarized antenna.At the same time,explore the effect of antenna spacing,horizontal angle spread,elevation angle spread on MIMO channel space-time correlation.The results showed that,with the expansion of the elevation angle from 0°to 60°,scattering environment is growing,signal dispersion is increasing,the received signal correlation between different antenna elements become weaker,the channel capacity will be greater.
关键词
空间信道模型/三维模型/MIMO信道容量Key words
spatial channel model/three-dimensional model/MIMO channel capacity引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据