Visible light communication system and method

Abstract

The invention provides a visible light communication system and a visible light communication method. According to the system and the method, after a signal generator generates a corresponding visible light signal based on a received input signal, a single photon avalanche diode detector is used for detecting the current photon number in the visible light signal, and a signal demodulator compares the current photon number with a preset threshold, and demodulates a corresponding output signal based on the comparison result to meet the requirements of subsequent devices. Thus it can be seen, compared with the existing visible light communication system, the visible light communication system adopts the single photon avalanche diode detector as the optical detector, thus the response speed is increased and the power consumption is reduced, and the sensitivity of detecting the visible light signal is greatly improved; particularly for an application scenario of long-distance transmission of weak light, the detection efficiency and the data transmission reliability are ensured, and the situation that the data cannot be normally transmitted is avoided.

Description

technical field [0001] The present application mainly relates to the field of optical communication, and more specifically relates to a visible light communication system and method. Background technique [0002] In the entire system and transmission process of communication transmission, the optical communication system, as the most basic and important component, is actually a communication technology with light waves as the transmission medium, which has transmission frequency bandwidth, large communication capacity and anti-electromagnetic interference. According to different classification standards, optical communication can be divided into different types, such as infrared optical communication, visible light communication and ultraviolet optical communication according to wavelength, and wired optical communication (such as optical fiber communication) according to transmission media. ) and wireless optical communication, etc., according to different application scena...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a visible light communication system and method, which solves the problem of insufficient sensitivity, high power consumption and slow response speed of photodetectors in existing visible light communication, which affects its detection efficiency and further affects the data transmission rate. and reliability, and even lead to technical problems that data cannot be transmitted normally

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