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Title: Performance enhancement techniques for indoor VLC systems
Authors: Zhong, WD
Wang, Z
Issue Date: 2015
Publisher: Cambridge University Press
Source: In S Arnon (Ed.), Visible light communication, p. 41-69. Cambridge: Cambridge University Press, 2015 How to cite?
Abstract: Introduction Light-emitting diodes (LEDs) have been widely deployed for illumination, due to their high performance and energy efficiency properties compared with conventional incandescent and fluorescent lamps [1]. In addition, advantages such as high frequency response, free spectrum license and high security have made LEDs a promising means for wireless communications, whereby people can access the internet through the same visible light. Significant research has been carried out to develop indoor high data rate visible light communication (VLC) systems [1–11]. The data rate of VLC systems in a laboratory environment has been demonstrated to reach the order of Gb/s [12, 13]. In addition, advanced modulation schemes such as spatial modulation [14–17] have been introduced to VLC systems to enhance the data rate considerably. In 2011, light-fidelity (Li-Fi) was introduced by Haas [18], who demonstrated that a VLC system can be leveraged to develop an alternative method of accessing network resources as a substitute for wireless fidelity (Wi-Fi). Although there has been significant progress in this area in the past decade, there are still some challenges to overcome in order to implement and deploy VLC systems [19] on a larger scale. Two major challenges are selection of an uplink transmission approach, and design of energy-saving receivers for long transmission distance. In this chapter, a number of recently proposed techniques [20–25] for enhancing the performance of indoor VLC systems are discussed along with results pertaining to their performance. These include a receiver plane tilting technique [21] and an LED lamp arrangement approach [22, 23] to improve the signal-to-noise ratio (SNR) and bit error rate (BER) performances, and performance evaluation of VLC systems under a dimming control scheme [20, 24].
ISBN: 9781107447981
DOI: 10.1017/CBO9781107447981.003
Appears in Collections:Book Chapter

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