Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/71249
Title: Should analogue pre-equalisers be avoided in VLC systems?
Authors: Li, Xicong
Ghassemlooy, Zabih
Zvanovec, Stanislav
Perez-Jimenez, Rafael 
Haigh, Paul Anthony
UNESCO Clasification: 3325 Tecnología de las telecomunicaciones
Keywords: Cap.
Channel Capacity
Equaliser
Visible Light Communications (Vlc)
Issue Date: 2020
Journal: IEEE Photonics Journal 
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 theoretical and experimental investigation that VLC with multi-band carrierless amplitude and phase modulation with bit-loading can outperform VLC with analogue pre-equalisers.
URI: http://hdl.handle.net/10553/71249
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2020.2966875
Source: IEEE Photonics Journal [ISSN 1943-0655], v. 12 (2), p. 1-14
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