基于波束域相位稳定性的目标检测方法研究  

Target Detection Method Based on the Stability of Beam Domain Phase

作　　者：郑恩明[1] 田甜[2] 陈新华[1] 王萍 李冰[1] 王麟煜[1] 上官经邦 宋春楠 

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国电子科技集团第3研究所,北京100015 [3]北京神州惠普科技股份有限公司,北京100085

出　　处：《电子学报》2016年第9期2033-2039,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61372180);国家重大科学仪器设备开发专项(No.2013YQ140431);中国科学院声学研究青年人才领域前沿项目资课题(No.Y454341261)

摘　　要：低信噪比下,为解决常规波束形成等权值累加空间谱各方位谱值,导致目标方位谱值被非目标方位谱值淹没,不能实现对水下辐射噪声信号未知的目标检测问题,本文提出了一种基于波束域相位稳定性的目标检测方法.依据水下目标辐射噪声含有稳定线谱及空间谱各方位对应波束域相位稳定性差异,该方法利用波束域相位方差对各方位谱值进行加权统计,实现了对水下目标方位角的有效估计.数值仿真和实验结果表明:相比常规波束形成,该方法可以进一步增强目标方位能量,抑制非目标方位噪声干扰,改善目标检测信噪比增益.In the conventional beam-forming（ CBF） under lowsignal to noise ratio（ SNR）,the spectrum values of each azimuth are accumulated by equal weight,and the spectrum values of targets are usually inundated in those of non-targets,so the underwater targets with unknown radiated noise can be hardly detected. In order to detect the effective target signal,a target detection method based on the beam domain phase stability is proposed. According to the feature that the underwater target radiates noise with stable line spectrum and the difference of the beam domain phase stability of each azimuth,this method cumulates spectrum values of each azimuth based on the beam domain phase variance by weighted statistical algorithm. Therefore,the azimuth of the underwater target is effectively estimated. The numerical simulation and experimental results both verify that,compared with the conventional beam-forming,this method can well enhance the energy of the target azimuth,restrain the background noise disturbances of non-target azimuth,and improve the SNR gain of the target detection.

关 键 词：阵列信号理 水下目标辐射噪声 波束域相位稳定性 加权统计 目标检测 

分 类 号：TB565[交通运输工程—水声工程]