Research On The Key Technology Of Under Water Communication

With the rapid development of science and technology, More and more attention to water acoustic communication technology. For acoustic communication in order complexity into one of the most sophisticated technology. Bacause underwater acoustic channel multi-path effects,it is an important factor making it interfere with the performance of underwater acoustic communication system.. Intersymbol interference caused by the multipath interference and impact indicators of communication, the key technology to solve this problem has become the key to improving system performance. Today, anti-multipath interference in the communications technology spread spectrum has great technical advantageThis paper describes the basis for further analysis of the channel water acoustic channel characteristics and drawbacks,Established models of underwater acoustic channel,Shows at on the development of underwater acoustic communication and research. Secondly: discusses the difficulties of underwater acoustic communication.Then discussed some of the key technologies in spread spectrum,according to the characteristics of direct-sequence spread-spectrum underwater acoustic channel for the modulation and demodulation techniques of the proposed DS/DBPSK.For the characteristics of multi-path fading is used by Rake receiver technology, the simulation is gived. Finally, the primary structure of the circuit was designed adopting a DSP chip TMS3206713as the core of the circuit.