Author
Al-Nahhal, Mohamed, Başar, E., Uysal, Murat
Publication Date
2021-07
Publication Place
-
IEEE
Subject
Decoding complexity, Maximum likelihood estimator, Multiple-input multiple-output, Orthogonal frequency division multiplexing, Visible light communications
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1089-7798
Record ID
1a4dd84c-c5a2-4c3f-b192-e7498b62f87d
Library Location
Electrical & Electronics Engineering
Date
2021-07
Sample Text
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.
DOI
10.1109/LCOMM.2021.3070272
Cilt
25
