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互耦效应对MIMO/SA多天线系统信道容量的影响 被引量：2

Effects of mutual coupling on the channel capacity of MIMO/SA multi-antenna system
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摘要 多输入多输出/智能天线(multiple input multiple output/smart antenna,MIMO/SA)系统是4G的关键技术之一,多天线的互耦效应是影响MIMO/SA多天线系统性能的主要问题。建立了MIMO与SA相结合的多天线系统模型,推导了互耦效应影响下空间相关系数和信道容量的表达式;通过电磁场数值计算和蒙特卡罗方法仿真MIMO/SA多天线系统的各态历经信道容量。结果表明:在典型的角度谱分布下改变天线间距,考虑互耦效应的信道容量围绕无互耦效应时的信道容量上下振荡;基站天线阵列间距增大信道容量持续增大,移动台天线阵列间距增大到0.5倍波长后信道容量基本保持不变;互耦效应增大信道的空域相关性,从而降低信道容量。 Multiple input muhipleoutput and smart antenna （MIMO/SA） system is one of the keytechnol ogles for the fourth generation mobile communications system, mutual coupling is the main factor which affects the performence of MIMO/SA multi antenna systems. A combination model of MIMO and SA is presented. With the existing of mutual coupling effects the expressions of spatial correlation and channel capacity are derived. The crgodic capacity of MIMO/SA multi antenna systems is simulated using electromagnetic numeric method and Monte Carlo method. The results show that in the typical power azimuth spectrum distribution, the channel capacity which takes mulual coupling into account oscillates up and down around the channel capacity without mutual coupling while changing the distance of the antennas; the channel capacity increases continually while increasing the distance of base station antenna array; when antennas distance of the mobile station is far ther than 0.5 wavelength the channel capacity remains almost the same even though the antenna array distance increases; and mutual coupling increases the channel spatial correlation of MIMO/SA multi-antenna systems and thus reduces the channel capacity.
作者 郭爱煌 肖法 黄宇胜 尚秀辉
机构地区 同济大学电子与信息工程学院 东南大学毫米波国家重点实验室
出处 《系统工程与电子技术》 EI CSCD 北大核心 2011年第9期2085-2089,共5页 Systems Engineering and Electronics
基金 毫米波国家重点实验室开放项目(K201009)资助课题
关键词 多天线系统 信道容量 蒙特卡罗方法 互耦效应 空间相关性 multi-antenna system channel capacity Monte Carlo method mutual coupling spatial correlation
分类号 TN914 [电子电信—通信与信息系统]
  • 相关文献

参考文献15

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二级参考文献15

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共引文献5

同被引文献15

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二级引证文献3

系统工程与电子技术
2011年 第9期

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