On improving the accuracy of Visible Light Positioning system based PAPR reduction schemes

DC-biased optical Orthogonal Frequency Division Multiplexing (DCO-OFDM)-based visible light positioning (VLP) technology along with the Received Signal Strength(RSS) positioning algorithm is widely used to achieve centimeter level positioning accuracy for incoming 5G era, especially indoor environment. However, the DCO-OFDM has the peak-to-average power ratio (PAPR) issue which imposes the nonlinear distortion and it will directly affect the positioning accuracy in the VLP system. The PAPR reduction scheme is urgently needed. Therefore , in this paper, the impact of PAPR reduction scheme on positioning accuracy is investigated. The positioning accuracy with and without the selected mapping (SLM)-based PAPR reduction method are compared. The preliminary simulation results show that the positioning accuracy has been improved by 7.07 cm after using the SLM-based PAPR reduction method. Index Terms-5G, Visible Light Positioning(VLP), Visible Light Communication(VLC), Received Signal Strength, Localiza-tion, DC-biased optical orthogonal frequency division multiplex-ing (DCO-OFDM), peak-to-average power ratio (PAPR), selected mapping (SLM)