The Research On Underwater Acoustic Remote Control Commands Of Sel-propulsion Models

Sound is the only effective information carrier for medium or long distance wireless communication in sea water currently , underwater acoustic communication plays an important role in national defense and in the development of marine economy . Many country spent a lot of manpower and material resource in underwater acoustic technology, and made many new equipment for all kinds of surroundings for the need about the oceanic action of mankind such as object detect,communication,position and navigation. With the characteristics of large ambient noise, very narrow bandwidth, lower carrier frequency, great propagation latency and time-space-frequency variant multi-path effect, the stochastic ocean channel has demonstrated the greatest complexity and difficulty for underwater acoustic wireless communication . The signal fading and the inter symbol interference which are caused by multi-path propagation was the main influence factor of underwater acoustic communication system.The characteristics of underwater acoustic channel were analyzed , and the dissertation gives the theory of the system survey tracking, The dissertation researched on the technology of underwater acoustic communication , and focused on the systematic key technologies and solve routes . The MATLAB simulate and feasibility analysis of the digital signal processor algorithm and also gives the realization of the hardware and the software in remote control,remote measure and track measure , design the distribute algorithm FIR filter based on FPGA.The test result indicates that the system could be achieved the due-design demand of processing high-frequency narrow pulse.