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.
Original language | English |
---|---|
Article number | 8960338 |
Pages (from-to) | 1-14 |
Number of pages | 14 |
Journal | IEEE Photonics Journal |
Volume | 12 |
Issue number | 2 |
Early online date | 15 Jan 2020 |
DOIs | |
Publication status | Published - Apr 2020 |
Keywords
- CAP.
- Visible light communications (VLC)
- channel capacity
- equaliser