@ARTICLE{Mohammed_Nazmi_A._Dimming_2020, author={Mohammed, Nazmi A. and Badawi, Kareem A. and Khalaf, Ashraf A. M. and El-Rabaie, S.}, volume={28}, number={4}, journal={Opto-Electronics Review}, pages={203-212}, howpublished={online}, year={2020}, 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={The presented work proposes a new dimming control schemes for indoor visible light communication which combines variable pulse-position modulation, colour shift keying as key schemes of IEEE 802.15.7 standard, and sub carrier-pulse-position modulation as a pulse-position modulation variant with orthogonal frequency division multiplexing. These schemes are then compared with traditional merging schemes utilizing pulse-width modulation and multiple pulse-position modulation with m-ary quadrature amplitude modulation OFDM. The proposed schemes are investigated in a typical room with a different lighting layout (i.e., distinctive and uniform lighting layout), followed by an illumination investigation to evaluate the performance of the proposed schemes, especially the enhanced achieved data rates, and to determine their limitations as reliable visible light communication systems that can satisfy both communication and illumination requirements.}, type={Article}, title={Dimming control schemes combining IEEE 802.15.7 and SC-LPPM modulation schemes with an adaptive M-QAM OFDM for indoor LOS VLC systems}, URL={http://journals.pan.pl/Content/118246/PDF-MASTER/OPELRE_28_2020_N_A_Mohammed.pdf}, doi={10.24425/opelre.2020.135259}, keywords={visible light communication, sub-carrier pulse position modulation, lightning topologies, bit error rate}, }