Design And Implementation Of Underwater Acoustic Communication-Location Algorithm Based On Amplitude Shift Keying

With the deepening of mankindundefineds understanding of the strategic position of the ocean,the exploitation of marine resources and the value of marine scientific research,the attention of the world to the ocean has been raised to an unprecedented strategic height.Underwater acoustic communication technology is the basic technical support for mankind to understand the ocean,develop the ocean and utilize the ocean.As a basic subject of underwater acoustic communication,underwater target location can provide a location reference for the follow-up research of underwater target tracking.Therefore,it is very important to build the underwater acoustic communication platform system which is beneficial to the experiment and has practical value.At the same time,the research of positioning system based on underwater acoustic communication platform is also a kind of practical application of underwater acoustic communication platform,which is of great significance to the construction of underwater acoustic detection network.The main research results of this paper are as follows:(1)In order to solve the problem of communication among the nodes under the complicated environment of the underwater environment,the underwater acoustic communication system based on the amplitude shift keying method is designed,and the underwater acoustic experiment platform of the underwater acoustic modem is set up to realize the information interaction between two or more underwater nodes.The experimental platform system has the capability of half-duplex communication and secondary development,and lays an experimental basis for the subsequent positioning design.The experimental results show that the designed underwater acoustic communication system can realize stable data transmission among the nodes.(2)In order to solve the problem of asynchronous positioning between nodes in underwater complex environment,based on underwater acoustic communication experiments,an asynchronous positioning strategy is designed to eliminate the influence of asynchronous clocks between nodes on the information interaction process,and the optimization function is established.The position information is solved by iterative least square method.Simulation results and experimental results verify the effectiveness and feasibility of the designed positioning strategy.(3)Without considering the underwater clock model,according to the relationship between the underwater acoustic signal intensity and the distance,the underwater positioning method based on the underwater acoustic received signal intensity is proposed and the optimization function is established.The position information is solved by iterative least square method.The location method is verified by simulation,and the experimental results and analysis are given in the experiment pool and Yanming Lake.