Visible light communication system and method based on LED

A technology of visible light communication and LED light source, applied in the field of visible light communication system based on LED, can solve the problem of inability to guarantee the reliability and effectiveness of visible light, and achieve the effect of reducing bandwidth, improving information transmission rate, and enhancing reliability.

Active Publication Date: 2016-11-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Application Information

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Problems solved by technology

[0004] What the present invention aims to solve is the problem that the existing modulation and demodulation method cannot guaran

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  • Visible light communication system and method based on LED
  • Visible light communication system and method based on LED
  • Visible light communication system and method based on LED

Examples

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[0042] For better understanding of the present invention, the present invention is further described below with reference to examples and accompanying drawings.

[0043] An LED-based visible light communication system such as figure 1 As shown, it consists of a transmitting device, an optical antenna and a receiving device.

[0044] The above-mentioned optical antenna includes an optical transmitting antenna and an optical receiving antenna. The optical transmitting antenna is a beam expanding optical lens (expanding telescope), which can effectively reduce the divergence angle of the transmitted beam. The optical receiving antenna is a filter group and a condensing lens, which can enhance the light intensity irradiated on the surface of the photoelectric detection module.

[0045] The above-mentioned transmitting device includes a transmitting main control module, an N-nDPAPM coding modulation module, N LED constant current driving modules and N LED light sources. The outp...

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Abstract

The invention discloses a visible light communication system and method based on an LED. The system is composed of a transmitting device, an optical antenna and a receiving device. The optical antenna comprises an optical transmitting antenna and an optical receiving antenna. The transmitting device comprises a transmitting master control module, an N-nDPAPM coding modulation module, N LED constant current drive modules and N LED light sources. The receiving device comprises a photoelectric detection module, a transimpedance amplifier module, an analog-to-digital conversion module, an N-nDPAPM decoding demodulation module and a receiving master control module. According to the system and the method, an N-nDPAPM modulation technology is employed, m-ary pulse amplitude modulation MPAM and n-dimensional pulse position modulation nDPPM are combined, therefore, the demand of a system for the bandwidth is reduced, the information transmission rate is improved, and the system reliability is improved. Compared with a single input single output SISO system, the system has the advantage that the channel capacity can be improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an LED-based visible light communication system and method. Background technique [0002] Compared with traditional lighting equipment, white LED has the advantages of low power consumption, long service life, small size, easy to drive, green and environmental protection, and is regarded as the fourth generation of energy-saving and environmentally friendly lighting products. Since the general working power of lighting LEDs is greater than 10W, it provides a good guarantee for visible light communication. Visible light communication (VLC) uses LED as the light source, visible light as the information carrier, the atmosphere as the channel, and the photoelectric detection module (PD) as the receiver, realizing the dual functions of LED lighting and communication. VLC has high security and good confidentiality, and is especially suitable for application in radio fre...

Claims

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Application Information

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IPC IPC(8): H04B10/116
CPCH04B10/116
Inventor 陈名松王策黄增盛郭洁周信玲王伟光董适
Owner GUILIN UNIV OF ELECTRONIC TECH
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