基于稀疏重构的机动拖曳线列阵空间谱估计  

Spatial spectrum estimation based on sparse reconstruction for maneuvering towed linear array

作　　者：袁骏[1] 蔡志明[1] 肖卉[2] 奚畅 YUAN Jun;CAI Zhiming;XIAO Hui;XI Chang(College of Electronics Engineering , Navel University of Engineering , Wuhan 430033 , Chin;DeprrCned of Air/Space Early-Warning Equipmeci, Air Force Early Warning Academy , Wuhan 430019 , China)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033 [2]空军预警学院空天预警装备系,湖北武汉430019

出　　处：《系统工程与电子技术》2017年第12期2652-2658,共7页Systems Engineering and Electronics

基　　金：大学科研发展基金(425517K175)资助课题

摘　　要：针对常规单拖曳线列阵声纳目标方位估计中存在的左右舷模糊问题,提出了一种联合多个波束快拍量测的空间谱稀疏重构估计方法。首先给出了拖曳线阵转向机动时的阵形递推估计方法,建立机动拖曳线列阵的接收信号模型;然后,利用拖曳线列阵转向机动引起的目标方位变化特征,从构造矩阵相关性角度分析实现拖曳线列阵空间谱无模糊重构的机理,构建了基于连续多个时刻波束快拍量测的稀疏重构模型。通过计算机仿真研究,对比分析了所提方法与常规波束形成方法的空间谱估计性能,结果表明所提方法对模糊目标的抑制比远大于目标信噪比,同时具有更好的角度分辨率,从而实现了拖曳线列阵全向空间谱估计。The port-starboard ambiguity in the conventional single towed linear array sonar is one of the most deceiving obstacles which exist in the way of development of spatial spectrum estimation.A novel spatial spectrum sparse reconstruction method based on multiple beam space measurements is proposed.Firstly,the array shape of maneuvering towed array is estimated using the recursive method and the array sparse signal model is established.Then,based on target bearing variation characteristics caused by vessel’s turning,the mutual incoherent property is analyzed to ensure the proposed algorithm possessing better spatial spectrum reconstruction property and the sparse reconstruction model based on continuous multiple beam snapshots is established.Simulation results demonstrate that compared with the conventional beamforming algorithm,the proposed algorithm has evident advantage in ambiguity suppression ratio and direction of arrival estimation performance.

关 键 词：拖曳线列阵 稀疏重构 目标左右舷分辨 波束快拍 

分 类 号：TB56[交通运输工程—水声工程]