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Coding-based flicker-free visible light communication method and system

A visible light communication, flicker-free technology, applied in the field of visible light communication, can solve problems such as wrong data judgment, and achieve the effect of reducing the communication bit error rate

Active Publication Date: 2021-05-25
EAST CHINA INST OF COMPUTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with this invention is that once the check digit is wrong when decoding, all subsequent data will be judged wrong

Method used

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  • Coding-based flicker-free visible light communication method and system
  • Coding-based flicker-free visible light communication method and system
  • Coding-based flicker-free visible light communication method and system

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Embodiment Construction

[0115] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0116] A coding-based flicker-free visible light communication system provided by the present invention includes

[0117] Transmitter module: perform CRC encoding, RS (n, k) encoding, RLL (w, v) encoding, modulation on the information to be transmitted, and convert the electrical signal into an optical signal for transmission;

[0118] RS coding is a kind of RS coding in which RS coding can be calculated by multiplying information and generating matrix, and can also be added by generating polynomial cal...

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Abstract

The present invention provides a coding-based flicker-free visible light communication method and system, including: a transmitter: performing CRC coding, RS coding, RLL coding, modulation on information to be transmitted, and converting electrical signals into optical signals for transmission; Receiver: Receives the optical signal, converts the optical signal into an electrical signal, performs demodulation and decoding, generates a preset number of candidates according to the probability information provided by the decoding and the decoding algorithm, and outputs the candidate with the highest probability by comparing. The present invention has the advantage of not changing the mechanism of the existing visible light communication transmitter, and considering the situation of concatenated codewords comprehensively, the designed joint decoder and selector can reduce the communication bit error rate.

Description

technical field [0001] The present invention relates to the technical field of visible light communication, in particular, to a code-based flicker-free visible light communication method and system. Background technique [0002] VLC (Visible Light Communication, visible light communication) uses 380-780nm visible light spectrum to communicate. With the explosive growth of bandwidth demand, people pay more and more attention to the scarcity of spectrum, and optical communication can be an effective method to deal with the scarcity of spectrum. LED (Light-Emitting Diodes, light-emitting diode) is an important part of visible light communication, because its fast switching characteristics can be used to encode information bits, making it feasible for VLC to provide lighting and communication functions at the same time. LED has the advantages of energy saving, long life, and environmental protection. It is widely used and gradually replaces existing light sources such as incand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04B10/50H04B10/516H04B10/60H04L1/00
CPCH04B10/116H04B10/502H04B10/516H04B10/60H04L1/004H04L1/0047H04L1/0061H04L1/0064
Inventor 王鹤戴严忠贺术
Owner EAST CHINA INST OF COMPUTING TECH