Open AccessPAPR reduction based on tone reservation scheme for DCO-OFDM indoor visible light communications
Author(s) -
Jian Bai,
Yong Li,
Yi Yang,
Wei Cheng,
Heng Du
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.024630
Subject(s) - visible light communication , orthogonal frequency division multiplexing , bit error rate , computer science , transmitter , transmission (telecommunications) , clipping (morphology) , reduction (mathematics) , electronic engineering , light emitting diode , optics , telecommunications , physics , mathematics , channel (broadcasting) , engineering , linguistics , philosophy , geometry
High peak-to-average power ratio (PAPR) leads to out-of-band power and in-band distortion in the direct current-biased optical orthogonal frequency division multiplexing (DCO-OFDM) systems. In order to effectively reduce the PAPR with faster convergence and lower complexity, this paper proposes a tone reservation based scheme, which is the combination of the signal-to-clipping noise ratio (SCR) procedure and the least squares approximation (LSA) procedure. In the proposed scheme, the transmitter of the DCO-OFDM indoor visible light communication (VLC) system is designed to transform the PAPR reduced signal into real-valued positive OFDM signal without doubling the transmission bandwidth. Moreover, the communication distance and the light emitting diode (LED) irradiance angle are taking into consideration in the evaluation of the system bit error rate (BER). The PAPR reduction efficiency of the proposed scheme is remarkable for DCO-OFDM indoor VLC systems.