@ARTICLE{El-Ganiny_Mohamed_Y._Hybrid_2022,
 author={El-Ganiny, Mohamed Y. and Khalaf, Ashraf A. M. and Hussein, Aziza I. and Hamed, Hesham F. A.},
 volume={30},
 number={3},
 journal={Opto-Electronics Review},
 pages={e141951},
 howpublished={online},
 year={2022},
 publisher={Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology},
 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 peak-to-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.},
 type={Article},
 title={Hybrid PAPR reduction schemes for different OFDM-based VLC systems},
 URL={http://journals.pan.pl/Content/124049/PDF/OPELRE_2022_30_3_M_Y_El-Ganiny.pdf},
 doi={10.24425/opelre.2022.141951},
 keywords={visible light communication, peak-to-average power ratio, bit error rate},
}