Visible-light multicolor high-speed transmission array system based on polarization

Abstract

The invention discloses a visible-light multicolor high-speed transmission array system based on polarization. According to the invention, a signal modulation module converts an input digital electric signal into an analog electric signal; an LED driving module drives an LED chip to emit light by using the received electric signal; each LED chip unit in an LED array independently sends an optical signal; an optical signal at a transmitting end is polarized through a transmitting-end polaroid; a transmitting-end focusing lens collimates the converted linearly-polarized light; a receiving-end focusing lens focuses linearly-polarized light of different colors from a transmitting end in a receiving area of a photoelectric detector array, different colors are filtered out through a receiving-end filter, and different polarization directions are filtered out through a receiving-end polaroid; a receiving unit of the photoelectric detector array completes photoelectric conversion of signals; a signal demodulation module converts the analog electric signal having undergone photoelectric conversion into a digital electric signal; and the color of the filter and the polarization direction of the polarizer of a receiving-end array unit are correspondingly the same as the color of the filter and the polarization direction of the polarizer of a transmitting-end array unit. According to the invention, inter-symbol interference between different channels can be effectively eliminated, and high-speed and high-quality communication is realized.

Description

technical field [0001] The invention belongs to the technical field of wireless optical communication, and in particular relates to a polarization-based visible light multicolor high-speed transmission array system. Background technique [0002] Visible light communication technology is a wireless optical communication technology that uses the visible light band as an optical carrier for communication. Compared with traditional radio communication, visible light communication technology has the characteristics of high efficiency, no electromagnetic interference, and environmental protection. At the same time, visible light communication also has More abundant spectrum resources, higher confidentiality and no need for licenses and other advantages. [0003] At present, the research on indoor visible light communication is dedicated to combining high-speed wireless data transmission with ordinary indoor lighting. In order to provide sufficient light intensity, most of the exis...

AI Technical Summary

Problems solved by technology

However, since visible light communication usually adopts intensity modulation and direct detection, and lacks frequency and phase information, different LED sub-channels interact and interfere with each other, resulting in large intersymbol crosstalk, which seriously affects the communication performance of the system.

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