电子学报2017，Vol.45Issue(9)：2170-2176,7.DOI:10.3969/j.issn.0372-2112.2017.09.017
一种高效稳健的均匀圆阵互耦校正方法
An Efficient and Robust Calibration Method of Mutual Coupling for Uniform Circular Array
摘要
Abstract
The strong electromagnetic mutual coupling effect of a compact uniform circular array (UCA) will severely degrade the performance of beamforming (BF) or direction-of-arrival (DoA) estimation.Based on the special circular symmetry of a UCA,a new efficient and robust calibration method is proposed for the mutual coupling effect.Only one single signal source and one trial are required to complete the calibration,and the direction of the signal source does not need to be calibrated beforehand.First in discrete Fourier transform (DFT) space,the mutual coupling matrix (MCM) is transformed to be a centrosymmetric vector.Then in a prior 2D spatial angular domain,limited angle searching is carried out to get the estimate of the parameters according to a novel objection ftnction based on the symmetry.Comparative simulations verify the effectiveness and robustness of the new algorithm and at the same time reveal that method based on rank reduction (RARE) lacks robustness,and thus a simple and efficient approach for mutual coupling calibration is provided when UCA is applied in radar,mobile communication system etc.关键词
阵列信号处理/波达方向估计/阵列校正/均匀圆阵/电磁互耦/秩损方法Key words
array signal processing/direction of arrival estimation/array calibration/uniform circular array/electromagnetic mutual coupling/rank reduction分类
信息技术与安全科学引用本文复制引用
刘松,廖勇,谢远举..一种高效稳健的均匀圆阵互耦校正方法[J].电子学报,2017,45(9):2170-2176,7.基金项目
国家自然科学基金重大研究计划培育项目(No.91438104) （No.91438104）
国家自然科学基金(No.61501066,No.61571069) （No.61501066,No.61571069）
重庆市基础与前沿研究计划项目(No.cstc2015jcyjA40003) （No.cstc2015jcyjA40003）
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) （No.ISN16-03）
中央高校基本科研业务费重点基金(No.CDJZR165505) （No.CDJZR165505）
