三种典型水声信号类型检测特性对比分析  

Confrontation and analysis of three typical submarine sound signal detect performance

作　　者：许佳丽 高飞 范龙 李国富[2] 甘忠良 XU Jiali;GAO Fei;FAN Long;LI Guofu;GAN Zhongliang(Naval Research Institute,Tianjin 300061,China;National marine technology center,Tianjin 300112,China)

机构地区：[1]海军研究院,天津300061 [2]国家海洋技术中心,天津300112

出　　处：《海洋测绘》2024年第4期58-63,共6页Hydrographic Surveying and Charting

摘　　要：水声信号的选择是传播损失调查工作中的重要环节,为进一步研究不同信号类型的检测性能,通过仿真研究与试验数据分析,对CW、扫频、伪随机编码这3种典型的水声信号类型检测性能进行了对比研究。其中,仿真研究使用射线理论模型中Bellhop程序计算宽带频域声信号,经傅里叶合成技术转化为时频声信号;信号检测性能分析采用带通滤波、匹配滤波和短时傅里叶变换方法开展。经对比后发现扫频信号和伪随机编码信号经匹配滤波后的信号主峰时频宽度小、幅度大,旁瓣小,易于区分,可获取信号多途到达结构,这对后续分析工作中反推反射系数有一定的优势。Choosing submarine sound signal is an important step of research at sound propagation loss,to do more at confrontation and analysis of different submarine sound signal detect performance,this article does confrontation and analysis of different submarine sound signal detect performance.This work helps to manufacture and use submarine sound prospecting apparatus.By phantom study and data analysis,this article focuses on detect performance of CW,frequency sweep and pseudo-random coding.During this work,phantom study used Bellhop procedural of ray theory model to count broadband frequency domain sound signal,by fourier transform to be time domain sound signal.Matched filtering,band-pass filtering and short time fourier transform were used to do confrontation and analysis of submarine sound signal detect performance.After this work,we find that frequency sweep and pseudo-random coding had lesser width and side lobe,big margin of signal mountain range,and they could be found multipath conformation.This study help calculation reflected coefficient.

关 键 词：水声信号检测 水声信号类型 匹配滤波 带通滤波 短时傅立叶变换 

分 类 号：P229[天文地球—大地测量学与测量工程]