Secure Mobile-Phone Based Visible Light Communications with Different Noise-Ratio Light-Panel

Chi Wai Chow*, Ruei Jie Shiu, Yen Chun Liu, Chien Hung Yeh, Xin Lan Liao, Kun Hsien Lin, Yi Chang Wang, Yi Yuan Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


We propose and demonstrate a visible light communication (VLC) system using a light-panel and a mobile-phone camera. We also propose the rolling-shutter-effect (RSE) pattern synchronization and demodulation algorithms. By using our developed mobile-phone application program, the RSE pattern can be demodulated even at very low illuminance. As the light-panel will have different advertisements on it, we also define a noise-ratio (NR) as the figure-of-merit; hence, different VLC data rates can be adjusted according to different advertisement NR values. Experimental bit error rate measurements at different free-space transmission distances and different NRs are performed.

Original languageEnglish
Article number7902806
Number of pages6
JournalIEEE Photonics Journal
Issue number2
StatePublished - 1 Apr 2018


  • CMOS image sensor
  • Light emitting diode (LED)
  • visible light communication (VLC)
  • GBIT/S

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