Should Analogue Pre-equalisers be Avoided in VLC Systems?

Li, Xicong, Ghassemlooy, Zabih, Zvanovec, Stanislav, Jimenezz, Rafael Perez and Haigh, Paul (2020) Should Analogue Pre-equalisers be Avoided in VLC Systems? IEEE Photonics Journal, 12 (2). pp. 1-14. ISSN 1943-0647

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

Abstract

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 experimental investigation that VLC with multi-band carrierless amplitude and phase modulation with bit-loading can outperform VLC with analogue pre-equalisers.

Item Type: Article
Uncontrolled Keywords: Visible light communications, channel capacity, equaliser, CAP
Subjects: F200 Materials Science
F300 Physics
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 21 Feb 2020 16:19
Last Modified: 12 Mar 2020 11:00
URI: http://nrl.northumbria.ac.uk/id/eprint/42177

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