Multichannel wavelength division multiplexing visible light communication system based on red green blue (RGB) light-emitting diode (LED)

A visible light communication and wavelength division multiplexing technology, which is applied in wavelength division multiplexing systems, short-range systems, free space transmission, etc. Effect of data transfer rate

Inactive Publication Date: 2013-03-13
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing visible light wireless communication systems, most of them use traditional white light LEDs to transmit one optical sign

Method used

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  • Multichannel wavelength division multiplexing visible light communication system based on red green blue (RGB) light-emitting diode (LED)
  • Multichannel wavelength division multiplexing visible light communication system based on red green blue (RGB) light-emitting diode (LED)

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[0015] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings:

[0016] Such as figure 1 The shown RGB LED-based multiple wavelength division multiplexing visible light communication system includes a transmitting module and a receiving module. The transmitting module includes: a first USB interface, a first bridge module, and a transmitting end. The input end of the first bridge module is connected to the second A USB interface, the output terminal is connected to the sending end; the first USB interface is used to receive serial bus signals, the first bridge module is used to convert the serial bus signals into TTL level signals, and the sending end is used to drive RGB LED devices; receiving The module includes: a receiving end, a second bridge module, and a second USB interface. The input end of the second bridge module is connected to the receiving end, and the output end is connected to the second...

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Abstract

The invention discloses a multichannel wavelength division multiplexing visible light communication system based on a red green blue (RGB) light-emitting diode (LED). The multichannel wavelength division multiplexing visible light communication system comprises a first universal serial bus (USB) interface, a first bridging module, a sending end, a receiving end, a second bridging module and a second USB interface, wherein each bridging module comprises an interface circuit and a coding and decoding circuit, and the sending end comprises a voltage amplifier, a serial-to-parallel conversion circuit, a direct-current bias tee and an RGB LED device. The receiving end comprises a photoelectric detector group, an amplifying circuit, a parallel-to-serial conversion circuit and a decision device. The RGB LED device is utilized to achieve white-light illumination effect; meanwhile, simultaneous transmission of three-channel parallel optical signals is achieved by red green blue three-color chips through multichannel wavelength division multiplexing, and the data transmission rate is greatly improved.

Description

technical field [0001] The invention relates to a multi-channel wavelength division multiplexing visible light communication system based on RGB LEDs, and belongs to the technical field of wireless communication. Background technique [0002] Due to the advantages of fast, convenient, and hot-swappable support of the USB interface, it has become the preferred choice for connecting external devices to the computer. Through the USB interface, the wireless access of high-speed data between computers can be realized by using the wireless visible light communication technology. In the existing visible light wireless communication systems, most of them use traditional white light LEDs to transmit one line of optical signal data. Due to the small bandwidth of white light LEDs, the transmission rate of visible light communication systems is greatly limited. [0003] Both white LEDs and RGB LEDs have the same goal. They both hope to achieve the effect of white light, but one is dire...

Claims

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Application Information

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IPC IPC(8): H04J14/02H04B10/116
Inventor 王永进丁礼伟刘芳何颖洁李丽冯姣
Owner NANJING UNIV OF POSTS & TELECOMM
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