Hermitian symmetry free optical-single-carrier frequency division multiple access for visible light communication - Université Grenoble Alpes Accéder directement au contenu
Article Dans Une Revue Optics Communications Année : 2018

Hermitian symmetry free optical-single-carrier frequency division multiple access for visible light communication

Résumé

Optical-orthogonal frequency division multiplexing (O-OFDM) is an effective scheme for visible light communications (VLC), offering a candid extension to multiple access (MA) scenarios, i.e., O-OFDMA. However, O-OFDMA exhibits high peak-to-average power ratio (PAPR), which exacerbates the non-linear distortions from the light emitting diode (LED). To overcome high PAPR while sustaining MA, optical-single-carrier frequency-division multiple access (O-SCFDMA) is used. For both O-OFDMA and O-SCFDMA, Hermitian symmetry (HS) constraint is imposed in frequency-domain (FD) to obtain a real-valued time-domain (TD) signal for intensity modulation-direct detection (IM-DD) implementation of VLC. Howbeit, HS results in an increase of PAPR for O-SCFDMA. In this regard, we propose HS free (HSF) O-SCFDMA (HSFO-SCFDMA). We compare HSFO-SCFDMA with several approaches in key parameters, such as, bit error rate (BER), optical power penalty, PAPR, quantization, electrical power efficiency and system complexity. BER performance and optical power penalty is evaluated considering multipath VLC channel and taking into account the bandwidth limitation of LED in combination with its optimized driver. It is illustrated that HSFO-SCFDMA outperforms other alternatives.
Fichier principal
Vignette du fichier
Hermitain Symmetry Free SCFDMA.pdf (479.94 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02019043 , version 1 (02-05-2023)

Identifiants

Citer

Ali Waqar Azim, Yannis Le Guennec, Ghislaine Maury. Hermitian symmetry free optical-single-carrier frequency division multiple access for visible light communication. Optics Communications, 2018, 415, pp.177-185. ⟨10.1016/j.optcom.2018.01.036⟩. ⟨hal-02019043⟩
64 Consultations
27 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More