Design And Implementation Of Semi-physical Simulation Platform For Underwater Acoustic Communication

Underwater acoustic communication is one of the main methods for ocean development and marine monitoring. Due to the various problems with underwater acoustic channel itself, such as narrow bandwidth, large delay, high noise, severe multi-path fading because of time-varying and space-varying, underwater acoustic communication has low rate of data transmitting and high error rate. In a word, underwater acoustic communication is one of the most challenging communication field.At present, the study of underwater acoustic communication mainly focuses on the computer simulation and acoustic Modem development, etc."Acoustic channel modeling and implementation of simulation platform"researched by Xiamen university simulated intrinsic path model of acoustic channel with Matlab simulation software"Simulation and Research on acoustic spread spectrum communication system"from Northwestern Polytechnic University studied the application of spread spectrum technology in underwater acoustic communication. Computer simulation can greatly reduce costs on human, material, wit during the acoustic experiment and so on, while simplified acoustic model cannot simulate complex acoustic channel comprehensively, which causing difficulty in suiting simulation results and the practical application. So now a lot of research institutions are also committed to the development of acoustic Modem, in order to inspect acoustic algorithm in actual acoustic communications and to improve the quality of underwater acoustic communication. Transporting and laying of acoustic instruments and equipment, power supply, pressure resistance and tightness of acoustic nodes, high cost and low efficiency of the sea test have become inevitable difficult problems in underwater acoustic communication.In order to solve a variety of problems in underwater acoustic communication, this paper proposes a concept of underwater acoustic communication semi-physical simulation platform. This platform brings such functions as underwater acoustic communication experiment, acoustic data acquisition, recovery and display, acoustic algorithm simulation and assessment, acoustic algorithm in application download together, which fully satisfy various research needs of experimental workers in acoustic communication. The overall goal is to supply an efficient, accurate, real-time, flexible technical support for the research of acoustic sensor network communication algorithm and decoding technology and to basically solve the main challenges the underwater acoustic communication faced.This subject is based on acoustic semi-physical simulation software control platform, WIFI wireless communication, acoustic sensor network and serial configuration characteristic of FPGA chip. Reasonable communication protocol guarantees accurate realization of system function.