Joint PAPR and Non-linear Distortion Mitigation in OQAM-FBMC based Visible Light Communication System

Abstract

Abstract Light emitting diode (LED) non-linearities bounds the output of visible light communication (VLC) system. In this work, non-linear distortion mitigation in VLC system is presented. Distortion due to LED’s front-end components and high peak to average power ratio (PAPR) effects are discussed. Both pre-distortion and post-distortion techniques are analyzed for the minimization of non-linear distortion of intensity modulation/direct detection (IM/DD) based channel. The modulation technique used is offset quadrature amplitude modulation (OQAM) - filter bank multi-carrier (FBMC). A joint PAPR reduction and non-linear distortion mitigation technique for VLC is proposed. The proposed technique consists of hybrid processing algorithm partial transmit sequence (H-PTS) technique for PAPR reduction and kernel minimum symbol error rate (KMSER) based post-distortion method for reduction of non-linear distortion. The results have shown that proposed technique shows 2 dB improvement in PAPR and 4 dB improvement in non-linear distortion of VLC system.