Thresholding schemes for visible light communications with CMOS camera using entropy-based algorithms

Kevin Liang, Chi Wai Chow*, Yang Liu, Chien Hung Yeh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Recent visible light communication (VLC) studies mainly used positive-intrinsic-negative (PIN) and avalanche photodiode (APD). VLC using embedded complementary-metal-oxide-semiconductor (CMOS) camera is attractive. Using the rolling shutter effect of CMOS camera can increase the VLC data rate; and different techniques have been proposed for improving the demodulation of the rolling shutter pattern. Important steps to demodulate the rolling shutter pattern are the smoothing and the application of efficient thresholding to distinguish data logic. Here, we propose and demonstrate for the first time two entropy thresholding algorithms, including maximum entropy thresholding and minimum cross entropy thresholding. Experimental evaluation to compare their bit-error-rate (BER) performances and efficiencies are also performed.

Original languageEnglish
Pages (from-to)25641-25646
Number of pages6
JournalOptics Express
Volume24
Issue number22
DOIs
StatePublished - 31 Oct 2016

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