三维空间MIMO信道接收天线阵列互耦效应及系统容量分析  

Effect of mutual coupling and antenna correlation on MIMO system in three-dimensional spatial channel models

作　　者：周杰[1,2] 陈靖峰[1] 邱琳[1] 菊池久和 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044 [2]日本国立新泻大学工学部电气电子工学科

出　　处：《通信学报》2012年第6期1-10,共10页Journal on Communications

基　　金：国家自然科学基金资助项目(61072137);江苏省科技支撑计划(工业)基金资助项目(BE2011298);江苏省高校自然科学研究计划基金资助项目(08KJB510009);教育部留学基金委启动基金资助项目(20071108);江苏省六大高峰人才基金资助项目(2008-118);江苏省博士后基金资助项目(2011-11-010986678)~~

摘　　要：针对非频率选择性瑞利衰落MIMO(multiple-input multiple-output)信道,建立了接收天线阵列的三维空间信道模型,将MIMO的一般信道建模推广到三维空间域。在建模过程中利用天线阵列在互耦效应下的等效网络模型,推导出三维空间域模型下的互耦相关性的通用表达式,阐明了互耦效应下相关性与无互耦相关性之间的关系。应用通用表达式分析了当接收端为不同的天线阵列结构时,入射信号的中心到达角和角度扩展分别对于在互耦效应下信道容量的影响。分析结果验证了不同的角度扩展对于互耦相关性的影响,揭示了在互耦效应下影响系统容量的主要因素为入射信号的平均中心到达角。A channel model for frequency nonselective Rayleigh fading MIMO channel was set up and the channel model setting was extended to three-dimensional space.The mutual coupling between antenna elements was analyzed based on the equivalent network model of the multiple-antenna.The general spatial correlation expressions of channel model with the impact of mutual coupling were derived in the three-dimensional spatial channels.When the receivers were different antenna arrays,the effect of the angular parameters associated with the mean azimuth of arrival（MAOA）,azimuth spread（AS）,meant elevation of arrival（MEOA） and elevation spread（ES） on the MIMO system capacity was investigated.Numerical results verifiy the impact of different angle spread on spatial correlation with the mutual coupling and indicate that the system capacity is more dependent on the MAOA and MEOA than the AS and ES.

关 键 词：天线阵列 信道模型 互耦效应 信道容量 角度扩展 

分 类 号：TN911.6[电子电信—通信与信息系统]