基于运动平台中心对称阵的相干信源DOA估计  

DOA estimation of coherent signals based on the centrosymmetric array of moving platform

作　　者：刘长远 LIU Changyuan(The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China;Hebei Key Laboratory of Electromagnetic Spectrum Cognition and Control,Shijiazhuang Hebei 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北省电磁频谱认知与管控重点实验室,河北石家庄050081

出　　处：《太赫兹科学与电子信息学报》2024年第9期1029-1037,共9页Journal of Terahertz Science and Electronic Information Technology

摘　　要：当存在多径问题时,圆阵的空间谱测向性能会严重下降。对此,提出一种基于运动平台的中心对称阵平滑空间谱估计算法。该算法利用阵列在空间上的平移,得到多个平移后的协方差矩阵;同时利用中心对称阵的对称性,将接收数据反向处理,获得虚拟阵列数据的协方差矩阵。之后对所有协方差进行叠加,可获得一个新的满秩的协方差矩阵,实现解相干处理,完成信号的来波方向估计。仿真实验验证了该方法的有效性,并具备较大的工程应用价值。When there is multipath propagation,the spatial spectrum direction-finding performance of circular arrays will be severely degraded.To address this,an algorithm based on the central symmetric array for smooth spatial spectrum estimation on a moving platform is proposed.This algorithm utilizes the spatial translation of the array to obtain multiple translated covariance matrices;at the same time,it leverages the symmetry of the central symmetric array to process the received data in reverse,obtaining the covariance matrix of the virtual array data.Subsequently,by stacking all covariance matrices,a new full-rank covariance matrix can be obtained,which achieves de-correlation processing and completes the estimation of the signal's direction of arrival.Simulation experiments have verified the effectiveness of this method and it has significant value for engineering applications.

关 键 词：均匀圆阵 空间平滑算法 超分辨 相干信源 

分 类 号：TN911[电子电信—通信与信息系统]