Communication method of single RGB-LED miniaturized full-duplex multi-user VLC

Abstract

The invention discloses a single RGB-LED miniaturized full-duplex multi-user VLC communication method, and the method comprises an LED-VLC system; the LED-VLC system comprises an LED end and a plurality of terminals communicating with the LED end through an uplink and a downlink; the LED end comprises a plurality of LED end PIN detectors and RGB lamp beads; each terminal comprises an uplink optical filter, a miniature all-solid-state spatial light modulator and a terminal PIN detector, and each terminal PIN detector is provided with a downlink optical filter. The method comprises the following steps: lightening an LED end to form an uplink and downlink communication link; enabling the micro all-solid-state spatial light modulator and the terminal to carry out photoelectric conversion and signal processing; establishing a bidirectional VLC communication link between the terminal and the LED terminal; if other terminals request to access, repeatedly executing the above steps until the capacity of the LED terminal access user is saturated. According to the invention, the equipment volume is reduced, the non-crosstalk transmission of the uplink and the downlink is realized, the rate of the uplink is improved, and the multi-user low-crosstalk dynamic access is realized.

Description

technical field [0001] The invention belongs to the technical field of visible light communication (Visible light communication, VLC), and in particular relates to a single RGB-LED miniaturized full-duplex multi-user VLC communication method. Background technique [0002] VLC is a technology that uses the flicker frequency of lighting light for data transmission, also known as "Li-Fi" (Light Fidelity) technology; RGB-LED is a technology that uses red, green and blue light distribution to form complex color light for lighting Solid state semiconductor devices. With the introduction of the "Li-Fi" concept, the continuous improvement of the integration of optoelectronic integrated devices, and the increasing development of LED lighting technology, LED-VLC systems have received extensive attention. Realizing a wireless optical communication network integrating lighting, positioning and communication functions indoors will provide people with more economical, more diversified an...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a single RGB-LED miniaturized full-duplex multi-user VLC communication method, which solves the needs of large uplink transmitting terminals, uplink and downlink crosstalk and multi-user access crosstalk in the prior art Questions to further improve

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