Research On Portable Underwater Acoustic Communication Platform Based On Morse

In this thesis,Morse code telegraph underwater acoustic communication technology is studied,based on portable signal processing platform.Experienced professional sonar operator is responsible for Morse code,Telegraph and underwater acoustic communication,Due to the complexity of underwater acoustic communication channels,artificial transmission of Morse code will show a certain time warp.It is very harmful for sonar to recognize and decode through human ear.The sending and listening of telegraph signals improved the requirements of sonar and greatly increased the sonar's working strength.The portable signal processing platform designed in this paper has the characteristics of small volume,low power consumption,portability,easy operation and high reliability.Running the Morse telegraph underwater communications software in the Windows XP operating system,Just click on the mouse to complete the communication process,Realize NATO system,single frequency system and double frequency system telegraph automatic communication function,Without professional member of telegraph signal transmitters and sonar to improve sonar operator working conditions,improve work efficiency.Firstly,this paper analyzes the characteristics of underwater acoustic signals of Morse and underwater noise.In view of the time-frequency characteristics of underwater acoustic Morse signals,a real-time detection method based on frequent envelope of signals is designed.In this paper,the overall design of portable signal processing platform is completed.A frequent envelope detection method for Morse telegraph signals in underwater acoustic communication is presented.Open signal processing software requirements analysis,envelope algorithm design.Morse telegraph codec,receive signal preprocessing,modulation and demodulation,and software interface design.Hardware design is carried out in the aspects of device selection,circuit principle design,interface design,PCB printed board design and whole machine design.Finally,system level emission and receiving performance test,the test results and data analysis,comprehensive evaluation of the portable signal processing platform performance,has good practical value in the Morse telegraph in underwater acoustic communication.