天线物理特性对MIMO信道空域相关性的影响  

Impact of Antenna Characteristic on MIMO Channel Spatial Correlation

作　　者：薛翠薇 朱秋明[1,2] 陈小敏[1] 廖志忠[2] 刘星麟[1] 

机构地区：[1]南京航空航天大学江苏省物联网与控制技术重点实验室,南京211106 [2]中国空空导弹研究院,河南洛阳471009

出　　处：《应用科学学报》2016年第3期251-262,共12页Journal of Applied Sciences

基　　金：中国博士后科学基金(No.2013M541661);中央高校基本科研业务费青年科技创新基金(No.NS2015046;No.NS2016044);江苏省普通高校研究生科研创新计划项目基金(No.SJZZ150040);江苏省物联网与控制技术重点实验室基金(No.NJ20160027)资助

摘　　要：针对天线物理特性会对MIMO信道空域相关性产生影响的问题,分析耦合和极化效应的产生及影响机理,构建非均匀散射环境下综合天线物理特性的单极化MIMO信道模型,据此导出MIMO信号的空域相关性理论表达式,并针对3GPP SCM标准信道场景参数进行仿真.仿真结果表明,耦合效应随天线间距变小而更显著,极化因子则与不同极化天线组合有关,两者在一定程度上可降低MIMO信道的空域相关性,但均不能有效提高系统容量性能.In view of the influence of physical characteristics of an antenna on spatial correlation of a MIMO channel, this paper establishes a MIMO channel model including both coupling and polarization by analyzing and modeling the mechanism of mutual coupling and antenna polarization. Based on this model, a theoretical expression of spatial correlation for the MIMO channel model is derived, and applied to 3GPP SCM standard channel propagation. Simulation results show that the mutual coupling effect becomes significant as the antenna spacing decreases, and the polarization factor varies due to different polar- ization angle combinations. Moreover, both mutual coupling and polarization can reduce spatial correlation to some degree, but they cannot improve system capacity.

关 键 词：多输入多输出 信道模型 空域相关性 互耦效应 天线极化 

分 类 号：TN98[电子电信—信息与通信工程]