摘要
水声信号是水下导航定位通信的主要信息载体,对其特性进行研究尤为重要。水声常用信号主要有连续波信号、线性调频信号和双曲线调频信号,研究了这三种常用信号的时域、频域以及功率谱波形,对它们的模糊函数、模糊度、模糊函数ξ=0和τ=0截面进行了计算,研究了这三种信号的自相关函数及小波时频分析,研究结果表明实验结果与理论值符合较好。
Underwater acoustic signal is the major information carrier of the underwater navigation and location and communi⁃cation.It is important to research the properties of underwater acoustic signal.The continuous wave signal and linear frequency mod⁃ulation signal and hyperbolic frequency modulation signal are the common signals used in the underwater.The time domain and fre⁃quency domain and the power spectral density of the three signals are investigated.The ambiguity function,ambiguity scale,ξ=0 andτ=0 sections of the ambiguity function are computed by simulation.The autocorrection function and the wavelet time-frequen⁃cy analysis of these three signals are researched.The research results show that the experiences match well with the theory value.
作者
代伟
刘漩
DAI Wei;LIU Xuan(No.91388 Troops of PLA,Zhanjiang 524022)
出处
《舰船电子工程》
2024年第4期173-177,共5页
Ship Electronic Engineering
关键词
频域
功率谱
模糊函数
自相关函数
小波时频分析
frequency domain
power spectral density
ambiguity function
autocorrection function
wavelet time-frequen⁃cy analysis
