海洋环境对海洋低频水声扩频通信的影响分析  

Analysis of the Influence of Marine Environment on Low Frequency Underwater Acoustic Spread Spectrum Communication

作　　者：李尧[1] 赵建康 龙海辉[1] 刘传奇 LI Yao;ZHAO Jiankang;LONG Haihui;LIU Chuanqi(Shanghai Jiao Tong University,Shanghai 200240)

机构地区：[1]上海交通大学,上海200240

出　　处：《舰船电子工程》2024年第8期157-160,184,共5页Ship Electronic Engineering

基　　金：上海商用飞机系统工程联合研究基金项目(编号:CASEF-2022-MQ01)资助。

摘　　要：水声通信是水下舰艇通信的主要手段,从基本物理原理的角度仿真分析海洋环境对水声扩频信号的可能影响,相较于实际海试实验降低了实验难度。选取等熵性质的非均匀介质中的声传播波动方程推导,建立水声信道动力学模型,分析了不同幅度海洋背景噪声下和不同海水密度区间中水声扩频信号传播后的幅频特性和通信误码率的变化。文中,利用Matlab进行微分方程数值解求解和水声传播信号的幅频特性分析。结果表明:1)海洋背景噪声在信噪比高于-20 dB时满足通信准确度要求;2)海水密度的变化对水声扩频通信准确度没有显著影响。Underwater acoustic communication is the main means of underwater ship communication.This paper simulates and analyzes the possible influence of ocean environment on underwater acoustic spread spectrum signal from the perspective of ba-sic physics principle,which reduces the high economic cost and time requirement of actual sea trial experiment.The wave equation of acoustic propagation in heterogeneous isentropic media is selected to deduce,and the dynamics model of underwater acoustic channel is established.The amplitude-frequency characteristics and communication bit error rate changes of underwater acoustic spread spectrum signal propagated under different amplitude Marine background noise and different density of seawater are ana-lyzed.In this paper,Matlab is used to solve the numerical solution of differential equation and analyze the amplitude-frequency characteristics of underwater acoustic propagation signal.The results show that:the Marine background noise meets the communica-tion accuracy requirement when the signal-to-noise ratio is higher than-20 dB.The variation of seawater density has no significant effect on the accuracy of underwater acoustic spread spectrum communication.

关 键 词：水声扩频通信 水声波动方程 海水密度 海洋背景噪声 误码率 

分 类 号：TN929.3[电子电信—通信与信息系统]