Open AccessZero reduction codes for efficient transmission and enhanced brightness in visible light communication
Author(s) -
Kim Kyuntak,
Lee Kyujin,
Lee Kyesan
Publication year - 2017
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2016.0042
Subject(s) - visible light communication , duty cycle , brightness , bit error rate , computer science , pulse position modulation , keying , reduction (mathematics) , transmission (telecommunications) , electronic engineering , optics , light emitting diode , algorithm , telecommunications , decoding methods , pulse amplitude modulation , physics , mathematics , engineering , pulse (music) , electrical engineering , detector , geometry , voltage
In this study, the authors propose novel zero reduction codes to simultaneously provide effective illumination and communication services in visible light communications (VLC). In general, the brightness of light‐emitting diode illuminations can be enhanced by increasing the duty cycle ratio (DCR) but in such cases, the bit error rate (BER) performance is significantly degraded in the VLC systems. This is because the decision interference of received 0 and 1 bits is increased owing to the decision boundary overlapped. The proposed coding scheme can improve the brightness without increasing DCR and also achieve the enhanced BER performance compared to the conventional modulation schemes such as variable pulse‐position modulation or variable on–off keying. The simulations results demonstrate that the proposed coding scheme provides the superior brightness and BER performances.