电讯技术2025，Vol.65Issue(6)：953-959,7.DOI:10.20079/j.issn.1001-893x.240313003
基于重构频域协方差矩阵的DOA估计方法
DOA Estimation Based on Reconstructed Frequency Domain Covariance Matrix
摘要
Abstract
A direction of arrival(DOA)estimation method based on reconstructed frequency domain covariance matrix is proposed to address the problem of poor performance or even failure of traditional DOA estimation methods under low signal-to-noise ratio(SNR)and few snapshots.This method suppresses noise by conjugate inverse correction based on the converted frequency domain signal,constructs a new frequency domain covariance matrix,establishes a spatial spectral estimation function using the average noise subspace,and estimates the azimuth of the signal source through spectral peak search.Through simulation and comparative analysis,the improved method proposed in this paper can identify multiple coherent signals and still achieve good azimuth estimation performance under low SNR and few snapshots.The estimation error is reduced by 2%～25%compared with that of traditional algorithms.关键词
相干信号/波达方向估计/频域协方差矩阵/噪声子空间/MUSIC算法Key words
coherent signal/DOA estimation/frequency domain covariance matrix/noise subspace/MUSIC algorithm分类
信息技术与安全科学引用本文复制引用
陈宝君,李学庆,鞠艳杰,王硕,李春林..基于重构频域协方差矩阵的DOA估计方法[J].电讯技术,2025,65(6):953-959,7.基金项目
大连市揭榜挂帅技术攻关项目(2022JB11GX001) （2022JB11GX001）
