TY - JOUR
T1 - Magnitude and Wrap-Phase OFDM for MIMO Visible Light Communication Systems
AU - Al-Nahhal, Mohamed
AU - Basar, Ertugrul
AU - Uysal, Murat
N1 - Funding Information:
Manuscript received March 8, 2021; accepted March 22, 2021. Date of publication March 31, 2021; date of current version July 10, 2021. This work was supported by the Turkish Scientific and Research Council under Grant 215E311. The associate editor coordinating the review of this letter and approving it for publication was C. Gong. (Corresponding author: Mohamed Al-Nahhal.) Mohamed Al-Nahhal and Murat Uysal are with the Department of Electrical and Electronics Engineering, Özyeg˘in University, 34794 ˙stanbul, Turkey (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 1997-2012 IEEE.
PY - 2021/7
Y1 - 2021/7
N2 - Generalized 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.
AB - Generalized 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.
KW - Visible light communications
KW - decoding complexity
KW - maximum likelihood estimator
KW - multiple-input multiple-output
KW - orthogonal frequency division multiplexing
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U2 - 10.1109/LCOMM.2021.3070272
DO - 10.1109/LCOMM.2021.3070272
M3 - Article
AN - SCOPUS:85103787442
SN - 1089-7798
VL - 25
SP - 2324
EP - 2328
JO - IEEE Communications Letters
JF - IEEE Communications Letters
IS - 7
M1 - 9391670
ER -