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

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.