Ellipse-based DCO-OFDM is proposed for VLC against nonlinear distortions.
The proposed E-DCO-OFDM achieves significant PAPR reduction of DCO-OFDM.
The performance of E-DCO-OFDM is enhanced by optimizing the system parameters.
The optimized E-DCO-OFDM achieves significant performance gain over DCO-OFDM.