基于伪虎鲸click信号的主动声呐探测信号低截获性分析  

Low interception analysis of active sonar detection signal based on Pseudorca crassidens click signal

作　　者：张略 黄海宁[1,3] 尹力[1,3] 薛山花[1,3] ZHANG Lue;HUANG Haining;YIN Li;XUE Shanhua(Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院先进水下信息技术重点实验室,北京100190

出　　处：《声学技术》2023年第2期156-160,共5页Technical Acoustics

摘　　要：为解决现代主动声呐易暴露的问题,提出以伪虎鲸click信号作为主动声呐发射信号波形进行探测,以实现声呐的低截获性。首先通过宽带模糊函数分析了伪虎鲸click信号的分辨性能;然后通过仿真对比单双基地声呐探测模型下,伪虎鲸click信号与常规主动声呐信号的截获因子,验证了其低截获性。结果表明,伪虎鲸click信号三维宽带模糊函数呈现理想的“图钉型”,时延分辨力达到7.644×10^(-6) s,频移分辨力达到7.405 Hz,具有良好的分辨性能;伪虎鲸click信号的截获因子在−4.887~−17.6 dB之间,始终小于0 dB,且远低于常规主动声呐信号,具有优异的低截获性能。伪虎鲸click信号作为声呐发射信号可实现有效与低截获性的声呐探测。To solve the easy exposure problem of modern active sonar,the Pseudorca crassidens click signal is proposed as the active sonar transmitting signal waveform for detection to achieve low interception of sonar detection.Firstly,the resolution performance of the Pseudorca crassidens click signal is analyzed by broadband ambiguity function.Secondly,the interception factors of Pseudo crassidens click signal and conventional active sonar signal under the mono-static and bi-static sonar detection model are compared by simulation to verify its low interception.The results show that the three-dimensional broadband ambiguity function of the Pseudorca crassidens click signal presents an ideal"thumbtack"shape with a time delay resolution of 7.644×10^(-6) s and a frequency shift resolution of 7.405 Hz,which shows a good resolution performance.The interception factor of Pseudo crassidens click signal is between−4.887 dB and−17.6 dB,which is always less than 0 dB and far lower than the conventional active sonar signal,showing the very excellent low interception performance.As a sonar transmitting signal,Pseudo crassidens click signal can realize effective and low interception sonar detection.

关 键 词：伪虎鲸click信号 低截获性 宽带模糊函数 截获因子 

分 类 号：U666.7[交通运输工程—船舶及航道工程]