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Multi-stage amplitude modulation visible optical signal coding method and apparatus and decoding method and apparatus, and system

An encoding method and visible light technology, applied in the field of visible light communication, can solve problems such as low transmission rate

Active Publication Date: 2014-05-14
KUANG CHI INTELLIGENT PHOTONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors of the present application found in practice that the transmission rate (that is, the amount of information transmitted per unit time) in the current method is still small, and there is room for further improvement

Method used

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  • Multi-stage amplitude modulation visible optical signal coding method and apparatus and decoding method and apparatus, and system
  • Multi-stage amplitude modulation visible optical signal coding method and apparatus and decoding method and apparatus, and system
  • Multi-stage amplitude modulation visible optical signal coding method and apparatus and decoding method and apparatus, and system

Examples

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no. 1 example

[0058] see figure 1 , is the encoding flowchart of the visible light signal in the first embodiment of the present invention, and the encoding process includes:

[0059] Step 101, divide the information to be sent into multiple information units.

[0060] Raw information can be represented by binary. Each information unit contains a plurality of bits (bit). For example, each information element contains 2 bits.

[0061] Step 102, convert the multiple information units into multiple electrical signal units.

[0062] In this embodiment, these electrical signal units are represented by three levels, such as 0, 1V and 2V. Wherein, the first level, such as 0V, is set as the reference level, which is used to indicate the interval between adjacent electrical signal units. The other two levels, such as 1V and 2V, are used to combine with each other in the electrical signal unit to represent 2 bits. Specifically, in an electrical signal unit, when the level jumps from 0V to 1V, a...

no. 2 example

[0092] see Figure 4 , is the encoding flowchart of the visible light signal in the second embodiment of the present invention, and the encoding process includes:

[0093] Step 301, divide the information to be sent into multiple information units.

[0094] Raw information can be represented by binary. Each information unit contains a plurality of bits (bit). For example, each information element contains 4 bits.

[0095] Step 302, convert the multiple information units into multiple electrical signal units.

[0096] In this embodiment, these electrical signal units are represented by four levels, such as 0V, 1V, 2V and 3V. Wherein, the first level, such as 0V, is set as the reference level, which is used to indicate the interval between adjacent electrical signal units. The other three levels, such as 1V, 2V and 3V, are used to combine with each other in the electrical signal unit to represent 3 bits.

[0097] For example, in an electrical signal unit, when the level ju...

no. 3 example

[0127] This embodiment is implemented in a photonic access control system, where a portable electronic device such as a mobile phone can be used as a sending end, and the access control end can be used as a receiving end. In addition to decoding the signal, the access control terminal can further use the signal for matching to decide whether to open the door.

[0128] see Figure 7 , is the encoding flow chart of the visible light signal according to the third embodiment of the present invention, and the encoding process includes:

[0129] Step 701, divide the identity authentication information to be sent into multiple information units in the mobile phone.

[0130] The original identity authentication information can be represented by binary. Each information unit contains a plurality of bits (bit). For example, each information element contains 2 bits.

[0131] Step 702, converting the multiple information units into multiple electrical signal units represented by three...

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Abstract

The invention relates to a multi-stage amplitude modulation visible optical signal coding method and apparatus and decoding method and apparatus, and a system. The coding method comprises the following steps that: to-be-sent information is divided into a plurality of information units and each information unit include a plurality of bits; the plurality of information units are converted into a plurality of electrical signal units that are expressed by at least three levels, wherein an interval that is expressed by a first level among the at least three levels is arranged between each adjacent electrical signal units and the plurality of bits of the information unit corresponding to each electrical signal unit are expressed by the combination unit of the rest of levels among the at least three levels; all the electrical signal units are combined so as to obtain a coded electrical signal; and the coded electrical signal is sent in a visible optical signal mode.

Description

technical field [0001] The present invention relates to visible light communication, in particular to a method, device and system for encoding and decoding visible light signals based on multi-level amplitude modulation. Background technique [0002] Visible light communication is a new, short-distance, high-speed wireless optical communication technology developed on the basis of LED technology. The basic principle of visible light communication is to use the characteristics of light-emitting diodes (LEDs) to switch faster than fluorescent lamps and incandescent lamps, and to communicate through high-frequency flickering of LED light sources. Lights represent a binary 1, and no light represents a binary 0. High-speed optical signals containing digital information can obtain information through photoelectric conversion. Wireless optical communication technology can be used to make wireless optical encryption keys because its data is not easy to be interfered and captured, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116
CPCH04B10/116
Inventor 不公告发明人
Owner KUANG CHI INTELLIGENT PHOTONIC TECH
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