不同环境下瓶鼻海豚click信号及仿真分析  

Click signal of bottlenose dolphin and its simulation analysis under different environments

作　　者：陈晟 牛富强 林长伦 刘伟 CHEN Sheng;NIU Fu-qiang;LIN Chang-lun;LIU wei(Third Institute of Oceanograph, Ministry of Natural Resources, Xiamen 361005, Fujian, China;Xia Men Fishing Port and Vessel Management Department, Xiamen 361005, Fujian, China)

机构地区：[1]自然资源部第三海洋研究所,福建厦门361005 [2]厦门市渔港渔船管理处,福建厦门361005

出　　处：《声学技术》2019年第4期452-458,共7页Technical Acoustics

基　　金：国家海洋局第三海洋研究所基本科研业务经费(海三科2015026、2017031)

摘　　要：瓶鼻海豚click信号具有较高的分辨率和抗混响性,但国内对其研究和应用仍然不足。利用宽带高频记录系统,对瓶鼻海豚在水池环境近距离目标以及自然环境下产生的click信号进行记录。经过统计和对比分析,瓶鼻海豚在水池环境下产生的click信号相比于自然环境下产生的click信号,信号长度更长,频率更低,带宽更窄。建立并利用瓶鼻海豚click信号的波形简化表达式,对仿生瓶鼻海豚click信号的模糊函数开展进一步仿真分析,结果表明,自然环境下的瓶鼻海豚click信号信号长度更短,有利于目标的分辨;水池环境下的瓶鼻海豚click信号,峰值频率更低,频带更窄,有利于抗混响。The click signal of bottlenose dolphin has high resolution and anti-reverberation ability. However, its research and application are still insufficient in China. The click signals of bottlenose dolphin generated in natural environment and in the pool have been recorded by the high frequency broad band recording system. Though statistical and comparative analysis, it can be seen that the click signal length of the bottlenose dolphin in the pool is longer than that in the natural environment, while it has lower frequency and narrower frequency band compared to the click signal generated in the natural environment. The simplified expression for the click signal of bottlenose dolphin is established and used for further simulation analysis of its ambiguity function. The results show that the shorter click signal length of the bottlenose dolphin generated in the natural environment can help improve the target resolution;the lower frequency and narrower frequency band of click signal of the bottlenose dolphin in the pool can help improve anti-reverberation ability.

关 键 词：瓶鼻海豚 click信号 信号长度 频率 抗混响 

分 类 号：TN911.7[电子电信—通信与信息系统]