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Multi-user visible light communication method and system

A technology of visible light communication and multi-user communication, applied in the multi-user visible light communication system and multi-user visible light communication field, can solve the problems of interference between users, affecting the reliability and security of the system, and small system capacity, so as to improve the security, The effect of reducing interference between users and increasing system capacity

Active Publication Date: 2016-05-04
SYSU CMU SHUNDE INT JOINT RES INST +1
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Problems solved by technology

[0004] However, at present, VLC systems are generally used in single-user scenarios, and the system capacity is small; for multi-user communication systems, there is also interference between users, which affects the reliability and security of the system

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  • Multi-user visible light communication method and system
  • Multi-user visible light communication method and system

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] The embodiments provided by the present invention include embodiments of multi-user visible light communication methods, and also include corresponding multi-user visible light communication system embodiments. Each will be described in detail below.

[0034] figure 1 It is a schematic flowchart of a multi-user visible light communication method according to an embodiment of the present invention; figure 1 As shown, the multi-user visible light communication method in this embodiment includes the following steps S1 to S4, each step is described in detail as follows:

[0035] S1, generatin...

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Abstract

The invention relates to a multi-user visible light communication method and a multi-user visible light communication system. The method comprises the steps of generating a plurality of chaotic sequences for identifying different users in a multi-user visible light communication system; performing CSK modulation on bit information input by each user of a transmitting end, thus obtaining a three-dimensional transmission vector, including RGB information, corresponding to each user; modulating the transmission vectors for the second time by using the chaotic sequences corresponding to the users, thus obtaining transmission matrixes corresponding to the users, and transmitting the transmission matrixes to a receiving end via an optical wireless channel; receiving the matrixes transmitted by the optical wireless channel by the receiving end, demodulating the matrixes by using the chaotic sequences corresponding to the users, thus obtaining the three-dimensional transmission vectors, including RGB information, corresponding to the users; and demodulating each three-dimensional transmission vector to obtain the bit information transmitted by the corresponding user. According to the multi-user visible light communication method, the interference among users can be reduced, the reliability and security of the system can be improved, and the system capacity can be increased.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a multi-user visible light communication method and a multi-user visible light communication system. Background technique [0002] Visible Light Communication (VisibleLightCommunication, VLC) technology uses light emitting diodes (LightEmittingDiode, LED) instead of traditional wireless antennas to transmit data, can realize lighting and communication at the same time, and can use the visible spectrum without authorization, which can solve the spectrum resources of traditional wireless communication systems shortage problem. [0003] Color shift keying (Colour Shift Keying, CSK) is a modulation technology suitable for visible light communication systems. In CSK technology, the transmission rate is increased by modulating the input bits into the CIE1931 color space, and then transmitting different information through different colors. Specifically, in the C...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04L27/00
CPCH04B10/116H04L27/001
Inventor 陈裕发张琳江明
Owner SYSU CMU SHUNDE INT JOINT RES INST
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