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http://dx.doi.org/10.46670/JSST.2020.29.4.243

Flicker Prevention Through Transition-Frequency Modulation in Visible Light Communication  

Lee, Seong-Ho (Department of Electronics and IT Media Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of Sensor Science and Technology / v.29, no.4, 2020 , pp. 243-248 More about this Journal
Abstract
In this study, we applied transition-frequency modulation to prevent the flickering of light-emitting diodes (LEDs) in visible light communication (VLC). In the VLC transmitter, rectangular waveforms with transition frequencies of four and two in each bit time were used for the high and low bits, respectively, in the non-return-to-zero data. In the VLC receiver, an RC-high-pass filter (HPF) was used to eliminate the interference of the 120 Hz noise light from the adjacent lighting lamps, and an SR-latch circuit was used to recover the transmitted signal using spikes from the output of the RC-HPF. This configuration is useful for constructing VLC systems that are flicker-free and resistant to adjacent noise light interference.
Keywords
Visible light communication; transition-frequency modulation; flicker; RC-high pass filter; SR-latch; noise light;
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Times Cited By KSCI : 1  (Citation Analysis)
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