MIMO中微小区空时相关信道模型的相关性分析  

Analyze the correlation in spacetime correlation channel model for MIMO

作　　者：魏旻[1] 龚耀寰[1] 李国才[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《系统工程与电子技术》2006年第7期973-976,984,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金重大项目(60496313);通信抗干扰国防重点实验室基金项目(51434939195DZ9291)资助课题

摘　　要：为了能在复杂的无线环境中使MIMO系统的优越性得到充分发挥,有必要深入研究无线传播环境对系统的影响。在MIMO系统中,信道的相关性会对系统特别是系统容量造成很大的影响。基于通用的微小区信道模型,利用几何方法分析并推导出微小区中信道间相关系数的封闭解表达式。仿真结果表明,相关系数随着发射、接收端天线阵元间距增大而呈现减小的趋势。所得到的相关系数封闭解表达式为MIMO系统的设计提供了一个有效的数学工具。With the growing importance of MIMO system, for making best use of the MIMO system in complicated wireless environment, it needs to analyze the effect of the wireless environment on the system. In MIMO, the correlation of the channel has obvious effect on the system, especially on the capacity. This paper derives the close-form expression of the correlation coefficient in microcellular, based on the geometrical method. At last, the simulation results account for the effect of the distance between the antenna elements on the correlation coefficient. The close-form of the correlation can help the design of MIMO system.

关 键 词：MIMO 信道 相关系数 

分 类 号：TN911[电子电信—通信与信息系统]