一种高效稳健的均匀圆阵互耦校正方法

发布时间：2018-05-30 22:31

本文选题：阵列信号处理 + 波达方向估计　；参考：《电子学报》2017年09期

【摘要】：紧凑均匀圆阵(UCA)的强电磁互耦效应严重影响波束赋形(BF)和波达方向(Do A)估计的性能,本文利用UCA的特殊圆对称性,提出了一种稳健高效的互耦参数校正方法.该方法只需要单个信源和单次校正实验,并且信源方向并不需要事先精确校准.首先互耦矩阵在离散傅里叶空间被转化为具有中心对称的一个参矢量,随后在一个有限的先验二维空间角域内进行搜索,从而根据基于对称性的目标函数将互耦参数估计出来.仿真对比实验验证了新校正算法的有效性和鲁棒性,同时揭示了秩损(RARE)校正方法不够稳健,为基于UCA的雷达、移动通信等应用提供了简单且高效的互耦误差校正方法.
[Abstract]:The strong electromagnetic mutual coupling effect of compact uniform circular array (UCA) seriously affects the performance of beamforming and DOA estimation. In this paper, a robust and efficient method for the correction of mutual coupling parameters is proposed by using the special circular symmetry of UCA. This method only needs a single source and a single correction experiment, and the direction of the source does not need to be calibrated accurately. First, the mutual coupling matrix is transformed into a centrosymmetric parameter vector in discrete Fourier space, and then a search is carried out in a finite prior two-dimensional space angular domain, and then the parameters of mutual coupling are estimated according to the objective function based on symmetry. The simulation results verify the effectiveness and robustness of the new correction algorithm and reveal that the rank loss correction method is not robust enough to provide a simple and efficient mutual coupling error correction method for radar and mobile communication applications based on UCA.
【作者单位】：重庆大学飞行器测控与通信教育部重点实验室;西安电子科技大学综合业务网理论及关键技术国家重点实验室;
【基金】：国家自然科学基金重大研究计划培育项目(No.91438104);国家自然科学基金(No.61501066,No.61571069) 重庆市基础与前沿研究计划项目(No.cstc2015jcyj A40003) 西安电子科技大学综合业务网理论及关键技术国家重点实验室开放基金(No.ISN16-03) 中央高校基本科研业务费重点基金(No.CDJZR165505)
【分类号】：TN911.7

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