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Visible light communication method combining color gamut modulation with spatial modulation

A technology of visible light communication and airspace modulation, applied in free space transmission, electromagnetic wave transmission system, short-distance system, etc., can solve the problems of not making full use of space information and limiting the maximum transmission rate, etc., and achieve low bit error rate and high data rate rate effect

Active Publication Date: 2015-07-29
SYSU CMU SHUNDE INT JOINT RES INST
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although CSK can obtain better bit error rate performance, its maximum transmission rate is limited because it does not make full use of spatial information.

Method used

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  • Visible light communication method combining color gamut modulation with spatial modulation
  • Visible light communication method combining color gamut modulation with spatial modulation
  • Visible light communication method combining color gamut modulation with spatial modulation

Examples

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Embodiment 1

[0040] Such as figure 1 , 2 , 3, the present embodiment takes 4 LED transmitters and 4 photodiode receivers as an example to fully illustrate the method provided by the present invention. The method provided by the present invention includes step S1, step S2, step S3, and step S4 , the following step-by-step detailed description of the method provided by the present invention:

[0041] S1. Convert the input binary information into a Dimensional binary matrix, where n is the total number of symbols sent, The number of bits contained in each transmitted symbol;

[0042] S2. For each symbol,

[0043] make m ~ = m osm + m csk = log 2 ( N t ) + m csk - - - ...

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Abstract

The invention relates to a visible light communication method combining color gamut modulation with spatial modulation. The visible light communication method includes the steps of S1, converting input binary information into a ( xn)-dimensional binary matrix, wherein the n refers to the total number of sent symbols, and the refers to the number of bits contained in the symbol sent for each time; S2, for every symbol, enabling FORMULA, wherein Nt refers to the number of RGB (red, green and blue) LED transmitters, mcsk refers to the number of bits contained in a CSK (color shift keying) modulation symbol for color gamut modulation, and mosm refers to the number of bits contained in an OSM (optical spatial modulation) symbol for spatial modulation; S3, after the CSK modulation symbol is subjected to CSK modulation, transmitting an acquired CSK modulation signal via the RGB LED transmitter selected by the OSM symbol; S4, by the aid of a receiver, receiving the CSK modulation signal transmitted by the RGB LED transmitter, and demodulating the OSM symbol and the CSK modulation symbol according to the received CSK modulation signal to restore bit information of the symbols.

Description

technical field [0001] The present invention relates to the field of communication, and more specifically, to a visible light communication method combining color gamut and spatial domain modulation. Background technique [0002] Optical Spatial Modulation (OSM) technology is one of the existing visible light communication technologies. It only transmits information through one light-emitting diode (LED) in each symbol period. This technology can avoid inter-carrier interference (Inter-carrier interference). -Carrier Interference, ICI), and can effectively utilize space diversity. In the OSM system, after the input bit is modulated by OSM, only one LED light is activated according to the input bit mapping table, and the optical signal sent by it reaches the receiving end through the optical wireless channel H(t), and the receiver demodulates the sent position information and then restore the information bits. However, although OSM technology can support higher rate transmi...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/556
Inventor 陈裕发江明
Owner SYSU CMU SHUNDE INT JOINT RES INST
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