Dimming techniques for visible light communication system

Ahmad Zabidi, Suriza and Akter, Sharmin and Zainal Abidin, M. Shahnan (2018) Dimming techniques for visible light communication system. Indonesian Journal of Electrical Engineering and Computer Science, 10 (1). pp. 258-265. ISSN 2502-4752 E-ISSN 2502-4760

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Abstract

Visible light communication (VLC) is an emerging and promising new technology in optical wireless communication (OWC). However, dimming has an adverse effect on the performance of visible light communication system. In visible light communication (VLC) system, illumination and communication both are provided simultaneously using a light emitting diode (LED). The specification for lighting is application specific for which dimming control is required. There are different modulation techniques for dimming control in visible light communication. In this thesis, NRZ-OOK modulation method and 4-QAM-OFDM modulation techniques are investigated for different dimming range, transmission distance, beam divergence angle and bit rate. The result shows that for 13m link range, 5Gb/s data speed is achievable for the 4-QAM-OFDM scheme. The analysis of this research is executed only based on system parameters. The scope of this research excluded the following parameters which are shadowing, mobility, multipath interference and inter-symbol interference for multicarrier modulation. These are the related research topic which can be investigated for future work.

Item Type:	Article (Journal)
Additional Information:	2435/76528
Uncontrolled Keywords:	VLC, Dimming, Optical Wireless, LED Dimming, NRZ-OOK, QAM-OFDM
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr Suriza Ahmad Zabidi
Date Deposited:	05 Dec 2019 15:17
Last Modified:	05 Dec 2019 15:18
URI:	http://irep.iium.edu.my/id/eprint/76528

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