LI, X., et al. Should Analogue Pre-Equalisers be Avoided in VLC Systems?. IEEE PHOTONICS JOURNAL. 2020, 12(2), ISSN 1943-0655. DOI 10.1109/JPHOT.2020.2966875.
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.
eng
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
IEEE
dc.relation.ispartof
IEEE PHOTONICS JOURNAL
dc.subject
Visible light communications (VLC)
eng
dc.subject
channel capacity
eng
dc.subject
equaliser
eng
dc.subject
CAP
eng
dc.title
Should Analogue Pre-Equalisers be Avoided in VLC Systems?