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Visible light communication system noise suppression method

A technology for visible light communication and system noise, applied in the field of visible light communication, can solve problems such as low complexity, and achieve the effects of reducing noise, improving computing speed and simplicity

Active Publication Date: 2019-11-22
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a noise suppression method for a visible light communication system aimed at the problems of the background technology, which effectively reduces the noise problem of the CMOS-VLC system, and the complexity is smaller than that of the traditional demodulation method

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a visible light communication system noise suppression method, and relates to the technical field of visible light communication, and the method comprises the steps: obtaininga row of pixels of a received image in the visible light communication system, wherein the row of pixels is located outside an area occupied by RGB-LED light source halo in the image; constructing a distinguishing Boolean value, conducting stripe classification on the row of pixels based on the distinguishing Boolean value, and determining the distinguishing Boolean value according to the maximumvalue of R, G and B channel difference values of two different pixel points and a first threshold value; determining the number of pixel points in each type of stripes, and determining noise stripes according to a second threshold value; determining the color of each non-noise stripe, and completing data demodulation. According to the method, the noise of the sample sheet can be greatly reduced; only a certain row of pixels in the image are researched, and all the pixels in the sample sheet are not calculated, so that the operation speed and the simplicity are improved.

Description

technical field [0001] The present invention relates to the technical field of visible light communication, in particular to a method for suppressing noise in a visible light communication system. Background technique [0002] Visible light communication (VLC, visible light communication) has excellent characteristics such as low cost and absolute safety, as well as the environment support of light-emitting diodes (LED, light emitting diode) everywhere, which makes the VLC system expected to become a candidate for the next generation of wireless communication technology choose. In visible light communication systems, there are usually two receiving methods, one is to use photodiodes to receive, and the other is to use complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) image sensors to receive, hereinafter referred to as CMOS- VLC system. [0003] CMOS image sensors exist in almost all smartphone cameras, and their unique imaging princip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04N5/357H04N5/374
CPCH04B10/116H04N25/60H04N25/76
Inventor 刘宏展卢国钧
Owner SOUTH CHINA NORMAL UNIVERSITY