Underwater LED (Light-Emitting Diode) long distance communication system based on visible light

Abstract

The invention discloses an underwater LED (Light-Emitting Diode) long distance communication system based on a visible light. The system comprises a transmitting device and a receiving device which are arranged underwater and respectively used for performing waterproof packaging; the transmitting device specifically comprises a data acquisition module, a transmitting end digital signal processing module, a digital to analog conversion module, a transmitting end amplifier equalization module, a direct current bias module and a light source; the receiving device specifically comprises an optical receiving module, a receiving end amplifier equalization module, a filter module, an analog to digital conversion module, a receiving end digital signal processing module and a data recovery module. The underwater LED long distance communication system based on the visible light provided by the invention can overcome the attenuation influence of an underwater environment on an electromagnetic wave and the disadvantage of low speed and low bandwidth of a sound wave, improve the transmission rate, increase the data carrying capacity, enhance the security, reduce the interference effect, reduce the equipment cost and power consumption, and realize high speed, high bandwidth, high security, and anti-interference underwater wireless optical communication.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an underwater LED long-distance communication system based on visible light. Background technique [0002] In recent years, with the rapid development of underwater detection technology, human beings have become more and more intensive in marine research and development, and the requirements for underwater supporting technologies have gradually increased, especially for underwater high-speed wireless communication technology. Requirements, for this underwater wireless optical communication came into being. The current underwater wireless communication methods are roughly divided into three categories: underwater long-wave radio communication (mainly used in military affairs), underwater wireless acoustic communication and underwater wireless optical communication. [0003] Under the limitation of special scenarios in the underwater environment, compared with the ot...

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Problems solved by technology

[0003] Under the limitation of special scenarios in the underwater environment, compared with the other two communication technologies, wireless optical communication has the advantages of fast speed (up to Gbps level), high bandwidth (high frequency of visible light band, strong information carrying capacity), and good confidentiality ( Due to the strong directionality of light, it is easy to be found if it is intercepted) and the characteristics of small size and low cost, it has outstanding advantages in short-distance underwater high-speed communication and long-distance underwater communication, but the existing technical solutions lack targeted System Research of Underwater Optical Wireless Communication

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