数字海洋与水下攻防2026，Vol.9Issue(1)：89-98,10.DOI:10.19838/j.issn.2096-5753.2026.01.009
基于牛顿正交匹配追踪的高特征分辨率水下弱目标参数估计方法
Newtonized Orthogonal Matching Pursuit Based High-Resolution Parameter Estimation for Underwater Weak Targets
周利博 1魏艳 2瞿逢重 1周鑫祎 1朱江 1吴光南 1江雨林 1陈越超 3张伟 3王方勇 4涂星滨2
作者信息
- 1. 浙江大学海洋学院 海洋精准感知技术全国重点实验室,浙江 舟山 316021||浙江大学杭州国际科创中心,浙江 杭州 310000||浙江大学海洋学院 全省高端科学仪器研制与应用重点实验室,浙江 舟山 316021
- 2. 浙江大学海洋学院 海洋精准感知技术全国重点实验室,浙江 舟山 316021||浙江大学海洋学院 全省高端科学仪器研制与应用重点实验室,浙江 舟山 316021
- 3. 杭州应用声学研究所 声呐技术重点实验室,浙江 杭州 310023
- 4. 汉江国家实验室,湖北 武汉 430000
- 折叠
摘要
Abstract
Target parameter estimation plays a vital role in ocean sensing tasks.Traditional underwater parameter estimation methods mainly rely on linear signal processing techniques,which have low computational complexity.However,under low signal-to-noise ratio(SNR)conditions and closely spaced targets scenarios,the estimation accuracy of these methods is restricted by sampling frequency,masking of weak targets by closely spaced strong ones,and the limited feature resolution.In addition,grid-based estimation algorithms are further constrained by grid mismatch due to continuous-valued parameters such as the delay and Doppler,althouth they can mitigate the masking of week targets by strong ones.To address these issues,a parameter estimation method based on Newtonized orthogonal matching pursuit(NOMP)is proposed in this paper.By treating the delay and Doppler as continuous-valued parameters,the initial estimates of the delay and Doppler are acquired via coarse detection,followed by refinement using Newton's method.By incorporating global orthogonalization and cyclic refinement,the proposed method effectively alleviates energy leakage and suppresses mutual interference,thereby improving both estimation accuracy and resolution.Numerical experiments demonstrate that the proposed approach achieves higher parameter estimation accuracy and resolution of weak targets under low SNR and closely spaced multi-target scenarios,compared to existing methods.关键词
水下弱目标/高特征分辨率/目标检测/参数估计/牛顿正交匹配追踪Key words
underwater weak target/high-resolution/target detection/parameter estimation/Newtonized orthogonal matching pursuit分类
通用工业技术引用本文复制引用
周利博,魏艳,瞿逢重,周鑫祎,朱江,吴光南,江雨林,陈越超,张伟,王方勇,涂星滨..基于牛顿正交匹配追踪的高特征分辨率水下弱目标参数估计方法[J].数字海洋与水下攻防,2026,9(1):89-98,10.
