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    Hybrid PAPR reduction schemes for different OFDM-based VLC systems

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    Author
    Hussein, Aziza cc
    Mohamed Y. El-Ganiny
    Hesham F. A. Hamed
    Ashraf A. M. Khalaf
    Subject
    Visible Light Communication
    Peak-to-Average Power Ratio
    Bit Error Rate
    
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    Abstract
    Orthogonal frequency division multiplexing has been widely used in many radio frequency wireless communication standards as a preferable multicarrier modulation scheme. The modulated signals of a conventional orthogonal frequency division multiplexing system are complex and bipolar. In intensity-modulated direct detection optical wireless communications, transmitted signals should be real and unipolar due to non-coherent emissions of an optical light emitting diode. In this paper, different hybrid optical systems have been proposed to satisfy real and unipolar signals. Peak-to-average power ratio is one of the biggest challenges for orthogonal frequency division multiplexing-based visible light communications. They are based on a combination of non-linear companding techniques with spreading or precoding techniques. Simulation evaluation is performed under direct current-biased optical orthogonal frequency division multiplexing, asymmetrically clipped optical orthogonal frequency division multiplexing, and Flip-orthogonal frequency division multiplexing systems in terms of peakto-average power ratio, bit error rate, and spectral efficiency. The proposed schemes are investigated to determine a scheme with a low peak-to-average power ratio and an acceptable bit error rate. MATLABTM software has been successfully used to show the validity of the proposed schemes.
    Department
    Electrical and Computer Engineering
    Publisher
    Polish Academy of Sciences and Association of Polish Electrical Engineers in cooperation with Military University of Technology
    Journal title
    Opto-Electronics Review
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