Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Flicker-free Visible Light Communication Using Three-level RZ Modulation

  • Lee, Seong-Ho (Department of Electronics and IT Media Engineering, Seoul National University of Science and Technology)
  • Received : 2019.10.16
  • Accepted : 2020.02.04
  • Published : 2020.03.31
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Abstract

We introduce a new visible light communication (VLC) method in which three-level return-to-zero (RZ) modulation is used for flicker-free transmission. In the VLC transmitter, the three-level RZ modulation ensures that the average optical power is constant; thus, a flicker-free light-emitting diode (LED) light is achieved. In the VLC receiver, a resistor-capacitor high-pass filter is used for generating spike signals, which are used for data recovery while eliminating the 120 Hz optical noise from adjacent lighting lamps. In transmission experiments, we applied this method for wireless transmission of an air quality sensor message using the visible light of an LED array. This configuration is useful for the construction of indoor wireless sensor networks for air pollution monitoring using LED lights.

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References

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