水声连续波信号相关检测方法研究  

Research on Underwater Acoustic Continuous Wave Signal Correlation Detection Method

作　　者：代伟 刘漩 DAI Wei;LIU Xuan(Unit 96,No.91388 Troops of PLA,Baoting 572318)

机构地区：[1]91388部队96分队,保亭572318

出　　处：《舰船电子工程》2024年第11期177-181,195,共6页Ship Electronic Engineering

摘　　要：水声信号中通常都含有大量的噪声,噪声会影响信号的采集与处理,如何将噪声滤除是水声信号处理中重要的难题,论文针对这一问题研究了相关检测的方法在水声信号去噪处理中的应用。首先设计了水声工程中常用的连续波信号作为研究对象,研究了连续波信号的模糊函数图,接着研究了海洋环境噪声的频谱以及海洋环境噪声的波形和舰船辐射噪声的频谱以及它的波形,将海洋环境噪声和舰船辐射噪声作为连续波信号在海洋传播过程中的主要噪声,研究了连续波信号混有噪声后的时域、频域波形,然后设计了巴特沃斯低通滤波器,将混有噪声的信号通过低通滤波器滤波,最后将滤波后的信号进行相关得到最终的检测信号。实验结果表明相关检测的方法可以有效地滤除信号中混有的噪声,并且效果良好。Underwater acoustic signal usually contains many noises which influence the signal acquisition and processing.How to filter out noises is an important difficult problem in the underwater acoustic signal processing.For this problem,the manu⁃script researches the application of correlation detection method in the denoising process of underwater acoustic signal.Firstly,the continuous wave signal which is commonly used in the underwater acoustic engineering is chosen as research object and ambiguity function figures of which are investigated.Then the ocean sea environment noises frequency spectrum and its time-domain waveform and the radiation noises frequency spectrum of naval ship and its time-domain waveform are researched.The ocean sea environment noises and the radiation noises of naval ship are the main noises during the continuous wave signal propagating in the underwater acoustic channel.The time-domain and frequency-domain waveforms of continuous wave signal mixed with noises are also studied.After that the Butterworth low-pass filter is designed and the continuous wave signal mixed with noises is filtered by the low-pass fil⁃ter.At last the filtered signal is correlated to obtain the final detected signal.The results show the correlation detection method can well resize filtering the noises mixed in the signal and the effect is fairly good.

关 键 词：连续波信号 模糊函数 海洋环境噪声 舰船辐射噪声 巴特沃斯低通滤波器 相关检测 

分 类 号：TN911.7[电子电信—通信与信息系统]