Open AccessHybrid mapped optical‐OFDM using non‐linear companding technique for indoor visible light communication application
Author(s) -
Sahoo Pritam Keshari,
Prajapati Yogendra Kumar,
Tripathi Rajeev
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2020.0041
Subject(s) - companding , bit error rate , orthogonal frequency division multiplexing , modulation (music) , computer science , reduction (mathematics) , spectral efficiency , electronic engineering , algorithm , precoding , discrete fourier transform (general) , mathematics , topology (electrical circuits) , fourier transform , telecommunications , short time fourier transform , physics , mimo , acoustics , engineering , channel (broadcasting) , fourier analysis , mathematical analysis , decoding methods , geometry , combinatorics
In this study, the authors have developed an analytical model for reducing the peak‐to‐average‐power ratio (PAPR) using non‐linear companding transform (NCT) based on inverse hyperbolic sine function. As a consequence of non‐linear transform, this study compensates the system bit error rate (BER) degradation with the help of an error efficient hybrid modulation. By means of an inflexion point and companding parameter, more design flexibility is achieved; as a result, a trade‐off between PAPR and BER has reasonably been more precise. To the best of the authors’ awareness, no findings have yet been reported on the performance evaluation of the optical orthogonal frequency division multiplexing (OOFDM) system using a hybrid modulation technique. To find out the advantages of hybrid modulation with NCT, the authors inspect the nature of PAPR reduction, and BER improvement through numerical simulations. The numerical BER results exhibit roughly 3 dBm decay in the power efficiency of hybrid modulation with NCT over discrete Fourier transform (DFT) precoding technique. On the other hand, the NCT technique with hybrid modulation has 6 dB less PAPR than the DFT precoding technique.