电讯技术2025，Vol.65Issue(9)：1454-1460,7.DOI:10.20079/j.issn.1001-893x.240528005
基于滤波预处理的非圆信号测向新方法
A Novel Direction Finding Method for Non-circular Signal Based on Filtering Preprocessing
摘要
Abstract
To address the issue of direction finding(DF)for non-circular signals and improve direction finding performance under low signal-to-noise ratio(SNR)conditions,a new method based on filtering preprocessing and matrix reconstruction is proposed.Firstly,a smoothing preprocessing method based on mean filtering is introduced,which can effectively smooth noise components under low SNR conditions and improve the SNR conditions.Then,by utilizing the non-circular characteristics of the signal,array expansion and matrix reconstruction are performed to avoid non-circular phase estimation,thus effectively reducing the dimension of parameter estimation.Finally,the estimation of signal parameters via rotational invariance techniques(ESPRIT)algorithm is used for DF estimation.Theoretical analysis and simulation results show that the proposed method has a simple estimation process and low computational complexity,and can significantly improve DF performance under low SNR conditions,providing higher estimation accuracy and success probability compared with existing methods in such scenarios.关键词
非圆信号/DOA估计/测向/ESPRIT算法/平滑预处理Key words
non-circular signal/DOA estimation/direction finding/ESPRIT algorithm/smoothing preprocess分类
信息技术与安全科学引用本文复制引用
安春莲,李鹏,杨古月..基于滤波预处理的非圆信号测向新方法[J].电讯技术,2025,65(9):1454-1460,7.基金项目
重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0429) （cstc2021jcyj-msxmX0429）
重庆市教委科学技术研究项目(KJQN202301317) （KJQN202301317）
