Orthogonal Chirp Division Multiplexing in Visible Light Communication: A Performance Comparison with OFDM-based Systems

Performance comparisons between visible light communication (VLC) systems based on orthogonal chirp division multiplexing (OCDM) and orthogonal frequency division multiplexing (OFDM) are presented in this paper. Unlike most of the related publications, in this work we compared OCDM and OFDM based VLC systems with the same equalization process, i.e., employing one tap equalizer in both systems. Simulation results in Line of Sight VLC channels show that both system have the same performance in all evaluated scenarios. The impact of the optical modulation index and the bias current of a previously characterized light-emitting diode were also evaluated.