指挥控制与仿真2024，Vol.46Issue(4)：105-112,8.DOI:10.3969/j.issn.1673-3819.2024.04.014
一种深海多途相干信道下的高分辨DOA估计方法
A high-resolution DOA estimation method for deep-sea multipath coherent channels
曹勇杰 1毛卫宁1
作者信息
- 1. 东南大学信息科学与工程学院,江苏 南京 210096
- 折叠
摘要
Abstract
Aiming at the problem of error in deep-sea DOA(Direction of Arrival,DOA)estimation based on plane wave sound field model,this paper establishes the array signal model of deep-sea DOA estimation under multipath channel based on ray theory.The characterization method of deep-sea multipath ray propagation time and adjacent array element ray propa-gation delay difference are also derived.Compared with the propagation delay difference expression of adjacent array elements in the traditional plane wave model,the propagation delay difference expression of adjacent array elements derived in this pa-per is more universal.Combined with the decoherence DOA estimation algorithm,the performance of deep-sea DOA estima-tion is improved,and the effectiveness of the algorithm is verified by simulation.The research shows that the time delay difference between adjacent array elements is not only related to the distance between array elements and the target azimuth,but also related to the depth of the sound source and the horizontal distance from the sound source to each array element.The construction of the steering vector in DOA estimation should consider the influence of these factors.At this time,DOA esti-mation is a multi-dimensional parameter optimization problem.Fully considering the acoustic propagation characteristics of the ocean sound field can fundamentally solve the error problem of deep-sea DOA estimation.关键词
阵列信号处理/深海多途相干信道/信号波达方向估计/高分辨方位估计Key words
array signal processing/deep sea multipath coherent channel/signal direction of arrival estimation/high reso-lution direction of arrival estimation分类
信息技术与安全科学引用本文复制引用
曹勇杰,毛卫宁..一种深海多途相干信道下的高分辨DOA估计方法[J].指挥控制与仿真,2024,46(4):105-112,8.
