摘要
常规波束形成技术因原理简单、稳健性好,在被动声呐工程实践中被广泛应用,但其测向精度低且多级旁瓣在探测中会产生虚警.采用相位干涉仪先粗测再精测和相位单元化筛选能量的思想,提出基于不同分裂阵配置的方法实现对目标的高精度、低虚警探测.海上试验数据的实际运用结果表明,本文方法可消除旁瓣干扰,噪声背景级相较常规波束形成技术降低至少5dB.该方法可用于被动均匀线列阵,对雷达和主动声呐的空间谱构建也有一定借鉴意义.
Conventional beamforming technology is widely used in passive sonar engineering practice,in view of its simple principle and good robustness,while false alarms due to multilevel sidelobes and low bearing accuracy defect still exist.The method using different split-beam configurations is proposed,considering serial rough and accurate measurement employed in phase interferometer together with energy selection used in phase binning process,to achieve high precision and low false alarm detection.The experimental results show that the proposed method is practical to reduce the sidelobe interference,and the noise background level is reduced by at least 5dB compared to the conventional method.The algorithm is suitable for passive uniform line array,and also has certain reference significance for radar and active sonar in spatial spectrum construction.
作者
曹宦植
蔡志明
幸高翔
奚畅
CAO Huan-zhi;CAI Zhi-ming;XING Gao-xiang;XI Chang(College of Electronic Engineering,Naval University of Engineering,Wuhan,Hubei 430033,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2019年第6期1388-1392,共5页
Acta Electronica Sinica
基金
国家自然科学基金(No.51679247)
关键词
被动声呐
均匀线列阵
旁瓣抑制
分裂阵配置
相位单元化
高测向精度
低虚警率
passive sonar
uniform linear array
sidelobe reduction
split-beam configuration
phase binning process
high bearing accuracy
low false alarm rate
