Analysis of the Influence of Marine Environment on Low Frequency Underwater Acoustic Spread Spectrum Communication
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.
万方数据
维普
