智能天线系统中阵元间互耦的影响及盲校正方法  

Effect of array mutual coupling on smart antennas and blind calibration

作　　者：林敏[1,2] 杨绿溪[2] 张艳君[3] 

机构地区：[1]南京电讯技术研究所,南京210007 [2]东南大学信息科学与工程学院,南京210096 [3]通信工程学院,南京210007

出　　处：《高技术通讯》2008年第1期6-10,共5页Chinese High Technology Letters

基　　金：国家自然科学基金(60496310;60672093);863计划(2007AA01Z262);973计划(2007CB310603);江苏省自然科学基金(BK2005061)资助项目

摘　　要：针对天线阵单元间互耦会导致智能天线性能下降这一问题,提出了一种盲校正方法。该方法基于均匀圆阵(UCA)互耦矩阵的特殊结构形式,利用子空间原理和拉格朗日乘子法,不需要任何辅助信号源就能同时完成阵列误差的校正和波达方向(DOA)的估计。在进行计算机仿真时,还提出了以空间响应相关系数(SRCC)为准则来详细地分析互耦对阵列性能的影响,并通过一些典型的例子证明了所提出的盲校正方法的可行性。In view of the fact that mutual coupling between elements in smart antennas always degrades the array processing performance, the paper proposes a novel blind calibration method for compensation of the error caused by the coupling. Based on the special structure of mutual coupling matrix of a uniform circular array, the proposed method uses the subspace principle and the method of lagrange multipliers to carry out both array calibration and direction-of-arrival estimation simultaneously without using any auxiliary signal sources. During the computer simulations, SRCC, i.e. spatial response correlation coefficient, was presented as a measure to quantify the effect of mutual coupling on the array in detail, and the validity of the proposed blind calibration method was verified through a few of typical experiments.

关 键 词：智能天线 波达方向估计 阵元间互耦 阵列校正 

分 类 号：TN821.91[电子电信—信息与通信工程] TN820