Imaging communication system and method based on multicolor visible light technology

Abstract

The embodiment of the present invention discloses an imaging communication system and method based on multi-color visible light technology. The system includes a sending end and a receiving end. The sending end includes a modulation module and an LED module. The LED module includes a variety of different colors The LED wick; the receiving end includes a demodulation module and a CMOS camera, and the CMOS camera receives the visible light signal sent by the sending end; the modulation module sequentially performs serial-to-parallel conversion, encoding, interleaving, modulation, and amplification on the original data to drive the LED wick Overlay transmission: the demodulation module decomposes each frame of image into images of multiple colors, extracts data respectively, and then performs decoding and parallel-to-serial conversion to obtain original data. The embodiment of the present invention suppresses the interference between different colors by jointly detecting LED wicks of multiple colors and adopting multi-color demodulation technology, so as to solve the problems of low communication rate of visible light imaging and interference between light of different colors, and further realize Multi-color multiplexing of multiple transmission signals.

Description

technical field [0001] The present invention relates to the technical field of visible light imaging communication, in particular to an imaging communication system and method based on multicolor visible light technology. Background technique [0002] Traditional visible light communication usually uses an LED as a transmitting end, adopts an intensity modulation / direct detection method, and uses a photo detector (Photo Detector, PD) for receiving. In practice, lighting is usually accomplished by a group of LEDs or LED arrays. In recent years, Liquid Crystal Displays (LCDs) have also generally entered people's lives. The idea of ​​receiving information from LED arrays or LCDs to complete communication by using Charge Coupled Devices (CCD) or CMOS imaging devices such as cameras, etc., was proposed and developed rapidly. Since the receiving end processes each frame of image received by the camera, it is also called visible light imaging communication. [0003] In 2015, the ...

AI Technical Summary

Problems solved by technology

Visible light imaging communication is limited by the frame rate of receiving camera equipment, and it is difficult to obtain a high communication rate. Although the use of the rolling shutter effect can make the receiving rate break through the frame rate limit, in the existing imaging communication technology, visible light communication The high-speed transmission performance has not been fully explored, and it still cannot meet the needs of transmitting files with larger data volumes

[0009] 2) The wavelength division multiplexing technology simply adopts the hardware filtering method of adding optical filters. There is interference between different colors of light, and the filtering effect is not good.

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