DFT-spread OFDM with quadrature index modulation for practical VLC systems | Zendy

Faheem Ahmed | Zendy; Yungui Nie | Zendy; Chen Chen | Zendy; Min Liu | Zendy; Pengfei Du | Zendy; Arokiaswami Alphones | Zendy

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DFT-spread OFDM with quadrature index modulation for practical VLC systems

Author(s) -

Faheem Ahmed,

Yungui Nie,

Chen Chen,

Min Liu,

Pengfei Du,

Arokiaswami Alphones

Publication year - 2021

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.441650

Subject(s) - orthogonal frequency division multiplexing , subcarrier , visible light communication , modulation (music) , quadrature (astronomy) , quadrature amplitude modulation , electronic engineering , computer science , modulation index , optics , bit error rate , telecommunications , physics , power (physics) , light emitting diode , engineering , decoding methods , acoustics , channel (broadcasting) , quantum mechanics , inverter

In this paper, we for the first time propose and investigate a novel discrete Fourier transform-spread-orthogonal frequency division multiplexing with quadrature index modulation (DFT-S-OFDM-QIM) scheme for practical visible light communication (VLC) systems. By performing subcarrier index modulation on both the in-phase and quadrature components of each subcarrier, OFDM-QIM achieves a higher spectral efficiency than conventional OFDM with index modulation (OFDM-IM). Moreover, the peak-to-average power ratio (PAPR) of OFDM-QIM can be substantially reduced by applying DFT spreading, and hence DFT-S-OFDM-QIM exhibits high tolerance against light-emitting diode (LED) nonlinearity. The superiority of the proposed DFT-S-OFDM-QIM scheme over other benchmark schemes has been successfully verified by both simulation and experimental results.

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