MIMO无线通信的空间自由度模型  

Novel model for the spatial degrees of freedom of MIMO wireless systems

作　　者：伍裕江[1] 聂在平[1] 

机构地区：[1]电子科技大学电子工程学院

出　　处：《系统工程与电子技术》2007年第8期1217-1221,共5页Systems Engineering and Electronics

基　　金：国家"863"高技术计划基金资助课题(2002AA123032)

摘　　要：采用本征模式方法研究了多天线无线通信的空间自由度问题。通过求解本征积分方程,得到给定发射区域和接收区域下多天线无线通信系统的本征函数,从而给出了多天线通信的物理限制以及相应的物理解释;通过将无线信道划分为发射天线到发射端近端散射体、发射端近端散射体到接收端近端散射体以及接收端近端散射体到接收天线三部分,提出了一种空间自由度的计算模型,分析了散射体对空间自由度的作用,并对已有模型的结果作出物理解释。An eigen mode method is adopted to investigate the spatial degrees of freedom for MIMO wireless communication systems. This method has a clear physical meaning and can be used to present the physical restriction of a MIMO system given the fixed transmitting and receiving volumes. By decomposing the wireless channel into three parts, that is, the part between the transmitting volume and local scatters, the part between two local scatters, the part between local scatters and receiving volume, the total degrees of freedom of MIMO systems thus can be solved conveniently. Moreover, the keyhole channel can be interpreted by this model.

关 键 词：多天线系统 空间自由度 MIMO信道 本征模式 

分 类 号：TN911.2[电子电信—通信与信息系统]