Performance analysis of DCO-OFDM in VLC system


Abdulkafi, Ayad Atiyah and Alias, Mohamad Yusoff and Hussein, Yaseein Soubhi (2016) Performance analysis of DCO-OFDM in VLC system. In: 2015 IEEE 12th Malaysia International Conference on Communications (MICC). IEEE, pp. 163-168. ISBN 978-1-5090-0019-7

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The performance of indoor visible light communication (VLC) systems using a direct current-biased optical orthogonal frequency division multiplexing (DCO-OFDM) scheme is investigated in this paper. The impact of nonlinearity of Light Emitting Diode (LED) and its beam angle on the VLC system performance is studied. We later analyze the effect of modulation order, number of subcarriers, signal scaling and biasing operation on the peak to average power ratio (PAPR) which is a major issue in OFDM based VLC system. Simulation results show that the bit error rate (BER) decreases as the degree of nonlinearity increases and a better BER can be achieved as the LED behavior approaches linear model. In addition, it is shown that reducing the QAM order or increasing the number of subcarriers may reduce the effect of the LED nonlinearity, thus improving the BER performance of the VLC system. Moreover, it is demonstrated that PAPR is higher for a large number of subcarriers and modulation order. Finally, the PAPR of the visible light OFDM system can significantly be reduced by employing the signal scaling combined with biasing operation.

Item Type: Book Section
Uncontrolled Keywords: Light emitting diodes, Optical transmitters, Peak to average power ratio, Optical distortion, Optical receivers, Nonlinear optics
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK7871 Electronics--Materials
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 22 May 2018 09:23
Last Modified: 22 May 2018 09:23


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