现代雷达2025，Vol.47Issue(12)：56-62,7.DOI:10.16592/j.cnki.1004-7859.20240709001
基于区间密度的宽带ISSM相干DOA估计方法
A Coherent DOA Estimation Method for Wideband ISSM Based on Interval Density
孙翔宇 1田陈勇 2蒋德富2
作者信息
- 1. 中国航空工业集团公司沈阳飞机设计研究所,辽宁沈阳 110035
- 2. 河海大学信息科学与工程学院,江苏南京 211100
- 折叠
摘要
Abstract
The estimation accuracy of direction of arrival(DOA)in the incoherent signal subspace method(ISSM)under low sig-nal-to-noise ratio condition is susceptible to the interference from data containing estimation errors of DOA angles at different fre-quency points.Furthermore,the ISSM method cannot solve the DOA estimation problem of broadband coherent signals.To over-come the limitations of the method,a novel broadband coherent DOA estimation method by building upon and refining the existing ISSM approach is proposed in this paper.Firstly,the frequency cross-spectral density matrix of different frequency points is ob-tained by the ISSM method,and the de-coherence processing is carried out.Then,the subspace DOA algorithm is used to calcu-late the DOA estimation results of each frequency point.Finally,the interval density method is used to fuse the DOA estimation re-sults of all frequency points to obtain the final DOA estimation result.The simulation results show that the proposed method,which is easy to implement in engineering,not only can effectively solve the estimation problem of wideband coherent signal,but also has better estimation performance and higher estimation accuracy under low signal-to-noise ratio.关键词
波达方向估计/宽带相干信号/区间密度/非相干信号子空间方法/解相干处理Key words
direction of arrival(DOA)estimation/wideband coherent signal/interval density/incoherent signal subspace method(ISSM)/decoherence processing分类
信息技术与安全科学引用本文复制引用
孙翔宇,田陈勇,蒋德富..基于区间密度的宽带ISSM相干DOA估计方法[J].现代雷达,2025,47(12):56-62,7.
