Publication: Magnitude and wrap-phase OFDM for MIMO visible light communication systems
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Program
KU-Authors
KU Authors
Co-Authors
Al-Nahhal, Mohamed
Uysal, Murat
Advisor
Publication Date
2021
Language
English
Type
Journal Article
Journal Title
Journal ISSN
Volume Title
Abstract
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.
Description
Source:
IEEE Communications Letters
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Keywords:
Subject
Telecommunications