基于均匀圆阵中心对称性的相干源方位估计  

Direction estimation of coherent signals based on the central symmetry of uniform circular array

作　　者：梁国龙 田蕴琦[1,2] 付进 邹男 LIANG Guolong;TIAN Yunqi;FU Jin;ZOU Nan(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;Qingdao Haina Underwater Information Technology Limited Company,Qingdao 266500,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [3]青岛海纳水下信息技术有限公司,山东青岛266500

出　　处：《哈尔滨工程大学学报》2019年第12期1958-1964,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2017YFC0306900);黑龙江省归国人员科学基金项目(JJ2016LX0051);青岛海洋科学与技术国家实验室开放基金项目(QNLM2016ORP0102);技术基础科研基金项目(JSJL2016604B003)

摘　　要：均匀圆阵的相干源方位估计一直是阵列信号处理中备受关注的问题,而现行算法的分辨率仍有进一步提高的空间。针对这一问题,本文提出了一种基于均匀圆阵中心对称性的解相干算法。首先利用模式空间变换将均匀圆阵等效为虚拟均匀线阵,然后利用均匀圆阵的中心对称性对模式空间数据进行共轭平均,最后计算数据的相关函数并据此构造Hermitian Toeplitz矩阵,实现相干源的方位估计。本算法实现简单,与传统算法相比具有更高的分辨率和方位估计精度。仿真实验证实了所提算法的有效性和性能优势。The direction estimation of coherent signals on uniform circular array(UCA)has always been an important topic in the array signal processing,and the resolution of existing algorithms can be further improved.A decoherence algorithm based on the central symmetry of UCA is proposed to solve this problem.First,the UCA equivalent to a virtual uniform linear array is obtained using the mode space transformation.Then,the mode space data are averaged by utilizing the central symmetry of UCA.Finally,the correlation function of the data is calculated,and the result is used to reconstruct a Hermitian Toeplitz matrix,realizing the direction estimation of coherent signals.The proposed method is simple and features a higher precision than the conventional algorithms.Simulations prove the effectiveness and superior performance of the proposed algorithm.

关 键 词：均匀圆阵 相干源 中心对称性 模式空间 HERMITIAN TOEPLITZ矩阵 方位估计 

分 类 号：TB566[交通运输工程—水声工程]