Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Time-division Visible Light Communication Using LED Lamp Light

  • Lee, Seong-Ho (Department of Electronics & IT Media Engineering, Seoul National University of Science and Technology)
  • Received : 2015.05.10
  • Accepted : 2015.05.24
  • Published : 2015.05.31
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Abstract

We introduce a new method of time-division visible light communication (VLC) using LED lamp light for the generation of synchronizing pulses. The LED lamp, driven by an AC 220-V power line, radiates light that has a 120-Hz frequency component. The pulse generator in each VLC system receives the LED lamp light and generates the synchronizing pulses that are required for time-division transmission of multiple VLC channels. The pulse period is subdivided into several time slots for VLC channels. In experiments, 120-Hz synchronizing pulses were generated using LED lamp light, and three VLC channels were transmitted independently without interfering with each other in a condition where the VLC signals overlapped in space. This configuration is useful in constructing multiple wireless sensor networks that are safe and without interference in locations where LED lamps are used for illumination.

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References

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