Power line carrier-based LED visible light communication system

A visible light communication, power line carrier technology, applied in electromagnetic wave transmission system, distribution line transmission system, transmission system and other directions, can solve the problems of easily interfered transmission information, damage to human body, low transmission rate, etc. Low construction cost and high ductility

Inactive Publication Date: 2012-08-01
郭丰亮
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] In order to overcome the technical defects of RF and infrared wireless network communication in the prior art, such as instability, poor security, slow transmission speed, short transmission distance, damage to the human body, and easy interference, as well as the inability of simple LED visible light communication In order to re

Method used

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  • Power line carrier-based LED visible light communication system
  • Power line carrier-based LED visible light communication system

Examples

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Embodiment Construction

[0037] see figure 1As shown, an LED visible light communication system based on a power line carrier includes an uplink and a downlink, the downlink includes a PC transmitting terminal 1, and the PC transmitting terminal 1 is used to modulate a digital signal to be able to The power line PLC modulator 2 of the electrical signal transmitted on the power line is connected to the power grid 3, and a power line PLC demodulator 4 for demodulating the electrical signal transmitted in the power line into a digital signal is connected to the power grid 3, And connect an FPGA coder 5, described FPGA coder 5 connects an LED lighting device 6; Also comprise some terminal equipment 10, each described terminal equipment 10 connects an FPGA decoder 9, and described FPGA decoder 9 connects A signal processing module 8, the signal processing module 8 is connected to a photoelectric detector 7, the optical signal emitted by the LED lighting device 6 is converted into an electrical signal by th...

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Abstract

The invention discloses a power line carrier-based LED visible light communication system, comprising an uplink and a downlink. The downlink comprises a PC transmitting terminal, wherein the PC transmitting terminal accesses an electric power grid via a power line PLC modulator, a power line PLC modulator is connected with the electric power grid and is connected to an FPGA encoder, and the FPGA encoder is connected to a an LED light-emitting device; and a plurality of terminal devices, wherein each terminal device is connected to an FPGA encoder, the FPGA encoder is connected with a signal processing module, and the signal processing module is connected with a photodetector. Optical signals emitted by the an LED light-emitting device is converted to electrical signals by the photodetector, the electrical signals are then amplified and processed by the signal processing module to be recovered into signalsidentical with signals modulated by the PC transmitting terminal, and at last the signals are transmitted to the terminal devices via the FPGA encoder. The uplink is configured to be symmetrical to the downlink, so as to achieve a full-duplex communication.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an LED visible light communication system based on power line carrier. Background technique [0002] Compared with the pure LED optical communication wireless network system, the uplink requires higher requirements on the transmission frequency and angle of the mobile terminal, and requires more research on physical layer technology. Information cannot be transmitted between partitions in the area, and auxiliary network transmission is required. At present, the transmission speed is not high, and the market application cannot be realized in the early stage, and the promotion is relatively difficult. [0003] At present, more mature wireless communication systems such as radio and infrared in the market have more leaps in technological innovation and progress, and the existing technologies have the following shortcomings: [0004] (1) Harmful to people [0005] Unde...

Claims

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Application Information

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IPC IPC(8): H04B10/10H04B3/54H04B10/116
Inventor 郭丰亮
Owner 郭丰亮
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