Data transmission system and data transmission method for underwater acoustic network

Abstract

The invention relates to a data transmission system for an underwater acoustic network, which comprises a plurality of independent underwater nodes, wherein each underwater node is equivalently connected with at least the other underwater node. The data transmission system also comprises a transmitting optical antenna, a receiving optical antenna, a light source, an optical modulator, an optical receiver, an underwater acoustic transducer / receiving transducer, a digital signal processor and a positioning module, wherein the positioning module is provided with a rotating device and used for completing the alignment between the light source and the optical receiver; the transmitting optical antenna, the light source, the optical modulator and the digital signal processor are in signal connection with each other in turn; the receiving optical antenna, the optical receiver and the digital signal processor are in signal connection with each other in turn; the digital signal processor is also in signal connection with the positioning module and the underwater acoustic transducer / receiving transducer respectively; and the light source is a blue-green laser source. The invention also relates to a data transmission method for the underwater acoustic network. The invention reduces the collision probability of data in the transmission process, improves the success rate of the constructionof a communication link, saves the network bandwidth, and improves the network throughout.

Description

technical field [0001] The invention relates to the field of underwater communication networks, in particular to an underwater acoustic network data transmission method based on an underwater acoustic network data transmission system. Background technique [0002] With the rapid development of modern information technology, communication has become a three-dimensional integrated demand network of land, sea and air, especially the underwater communication network represented by the ocean has become an indispensable part of national defense, communication, surveillance, detection and other activities. [0003] The underwater acoustic channel is a very complex random parameter multipath transmission channel. Its noisy environmental noise, limited available bandwidth, Doppler frequency shift, large propagation delay and many other unfavorable factors make it possible to achieve high data rate and low error rate underwater. Bit rate communication is very difficult, and in terms o...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of data collision and low success rate of communication link establishment due to the large propagation delay of ultrasonic signaling in the process of establishing the network communication link of the traditional underwater acoustic network, the purpose of the present invention is to provide a solution based on the underwater acoustic network. The data transmission method of the underwater acoustic network of the data transmission system, which reduces the collision probability of data in the transmission process, improves the success rate of communication link establishment, saves network bandwidth, and improves network throughput

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