PAM- and CAP-Based Transmission Schemes for Visible-Light Communications

Visible light communications (VLCs) have received extensive attention in the research community thanks to their advantages of high bandwidth, low cost, robustness to electromagnetic interference, operation in an unregulated spectrum, and high degree of spatial confinement in indoor scenarios. One of...

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Bibliographic Details
Published in:IEEE access 2017-01, Vol.5, p.27002-27013
Main Authors: Khalighi, Mohammad-Ali, Long, Shihe, Bourennane, Salah, Ghassemlooy, Zabih
Format: Article
Language:English
Subjects:
Bandwidth
Bandwidths
carrierless amplitude and phase modulation
Electromagnetic interference
Engineering Sciences
Equalization
frequency-domain equalization
Light emitting diodes
Lighting
Modulation
optical OFDM
Optics
Orthogonal Frequency Division Multiplexing
PAPR
Peak to average power ratio
Phase modulation
Photonic
Pulse amplitude modulation
Radio frequency
Robustness (mathematics)
Signal and Image processing
Spectral emittance
Visible-light communications
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Summary:Visible light communications (VLCs) have received extensive attention in the research community thanks to their advantages of high bandwidth, low cost, robustness to electromagnetic interference, operation in an unregulated spectrum, and high degree of spatial confinement in indoor scenarios. One of the main limitations for high data-rate transmission in VLC systems is the limited modulation bandwidth of commercial light emitting diodes. To circumvent this limitation, spectrally efficient modulation schemes should be used. Optical orthogonal frequency-division multiplexing (O-OFDM)-based schemes have become very popular and several proofs of concept have shown their ability to attain over gigabits per second transmission rates. We consider here the use of pulse amplitude modulation and carrier-less amplitude and phase modulation schemes together with frequency-domain equalization (FDE) at the receiver as interesting alternatives to O-OFDM. We show the advantages of the former schemes in terms of the peak-to-average-power ratio, and demonstrate through numerical results the merits of FDE-based signaling in attaining high data rates.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2017.2765181