Method and device of remote underwater acoustic communication

Abstract

The invention discloses a method and a device of remote uderwater acoustic communication. The device comprises more than one underwater communication nodes and more than one abovewater communication buoys which are responsible for communication with more than one underwater communication nodes within a set distance range through an underwater acoustic channel; and the communication connection is carried out between the abovewater communication buoys through a land wireless channel. In the method, the multi-frequency band combination is adopted to sent data in parallel, and the remote communication is realized by uniting the communication buoys; in the remote communication, a three-time handshake protocol in the carrier sense multiple access (CSMA) needs not to be used in the communicationbetween the underwater communication nodes and the buoys, while a channel can be directly monitored in a full frequency range; the data are synchronously sent to the abovewater communication buoys inparallel on each subchannel on the monitored idle channel by utilizing a frequency modulation method; and the data is transmitted by the abovewater communication buoys through a radio wave manner. Bythe method and device provided by the invention, one-time successful transmission probability of the two parties of the communication can be improved, and the anti-interference performance of a system is enhanced.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a long-distance underwater acoustic communication method and device for transmitting data by combining multiple frequency bands and using buoys for communication. Background technique [0002] With the further research and utilization of marine resources, people pay more and more attention to underwater acoustic communication, and how to carry out high-quality underwater acoustic communication has become the focus of people's research. Most of the existing research focuses on how to improve the bandwidth utilization and reduce the bit error rate, but it should be pointed out that the real-time performance of underwater acoustic communication should also be paid attention to. [0003] At present, the research on land wireless communication has entered a relatively mature stage. The emergence of new technologies has improved the real-time and reliability o...

AI Technical Summary

Problems solved by technology

However, most of the existing communication buoy relay devices only realize the relay and forwarding of communication, and do not have a good signal processing function, so that the anti-interference ability of the signal receiving device is insufficient, and it is easy to occur in the process of signal relay. The phenomenon of packet loss or wrong reception increases the bit error rate of communication and greatly reduces the effectiveness of communication

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