Should Analogue Pre-equalisers be Avoided in VLC Systems?

Xicong Li, Zabih Ghassemlooy, Stanislav Zvanovec, Rafael Perez Jimenezz, Paul Haigh

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
58 Downloads (Pure)


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.
Original languageEnglish
Article number8960338
Pages (from-to)1-14
Number of pages14
JournalIEEE Photonics Journal
Issue number2
Early online date15 Jan 2020
Publication statusPublished - Apr 2020


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