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Should Analogue Pre-Equalisers be Avoided in VLC Systems-

Lookup NU author(s): Dr Paul HaighORCiD

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Abstract

© 2009-2012 IEEE.Visible light communication (VLC) systems are highly constrained by the limited 3-dB bandwidth of light-emitting diodes (LEDs). Analogue pre-equalisers have been proposed to extend the LED's bandwidth at the cost of reduced signal-to-noise ratio (SNR). Compared with the pre-equaliser, the multi-carrier modulation with bit-loading can efficiently use the spectrum beyond the LED's raw 3-dB bandwidth without incuring SNR penalties by employing multiple narrow quasi-flat sub-bands to eliminate the need for equalisation. In this work we show by means of theoretical and experimental investigation that VLC with multi-band carrierless amplitude and phase modulation with bit-loading can outperform VLC with analogue pre-equalisers.

Publication metadata

Author(s): Li X, Ghassemlooy Z, Zvanovec S, Perez-Jimenez R, Haigh PA

Publication type: Article

Publication status: Published

Journal: IEEE Photonics Journal

Year: 2020

Volume: 12

Issue: 2

Print publication date: 01/04/2020

Online publication date: 15/01/2020

Acceptance date: 12/01/2020

Date deposited: 28/05/2020

ISSN (electronic): 1943-0655

Publisher: Institute of Electrical and Electronics Engineers Inc.

URL: https://doi.org/10.1109/JPHOT.2020.2966875

DOI: 10.1109/JPHOT.2020.2966875

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