Al-Nahhal, MohamedBaşar, E.Uysal, Murat2022-09-262022-09-262021-071089-7798http://hdl.handle.net/10679/7877https://doi.org/10.1109/LCOMM.2021.3070272Generalized light emitting diode (LED) index modulation (GLIM) has been proposed as an effective multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) scheme for visible light communications (VLC) systems. In this letter, we propose a magnitude and wrap-phase OFDM (MW-OFDM) scheme for MIMO VLC systems. The proposed MW-OFDM system relies on the conversion of complex signals into polar form with the magnitudes and wrap-phases to decrease the restriction on the number of LEDs compared to the conventional GLIM-OFDM. Furthermore, maximum likelihood and best linear unbiased estimators of the proposed scheme are derived. The proposed MW-OFDM scheme improves the average bit error rate and provides a significant reduction in the decoding complexity, compared to the GLIM-OFDM. Moreover, a half number of LEDs are required for the proposed scheme to deliver the same spectral efficiency in a comparison with the GLIM-OFDM. Numerical results are presented over MIMO VLC channels to elaborate the superiority of our proposed scheme.enginfo:eu-repo/semantics/restrictedAccessArticle2572324232800067752530004610.1109/LCOMM.2021.3070272Decoding complexityMaximum likelihood estimatorMultiple-input multiple-outputOrthogonal frequency division multiplexingVisible light communications2-s2.0-85103787442