Spectrally Augmented Hartley Transform Precoded Asymmetrically Clipped Optical OFDM for VLC

Ali Waqar Azim (1) , Yannis Le Guennec (2) , Ghislaine Maury (1)

1 IMEP-LAHC - Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation
2 GIPSA-CICS - GIPSA - Communication Information and Complex Systems

In this letter, layered discrete Hartley transform (DHT)-spread asymmetrically clipped optical-orthogonal frequency division multiplexing (LDHTS-ACO-OFDM) is presented; it uses DHT for multiplexing/demultiplexing and pulse-amplitude modulation (PAM) alphabets. LDHTS-ACO-OFDM yields several concrete enhancements over classical layered asymmetrically clipped O-OFDM (LACO-OFDM), such as low peak-to-average power ratio (PAPR), lower computational complexity, improved bit error rate (BER), and lower optical power penalty in a dispersive channel. Besides, LDHTS-ACO-OFDM augments the spectral efficiency relative to DHTS-ACO-OFDM with each addition of layer and ousts the inefficient bandwidth utilization limitation of DHTS-ACO-OFDM.

Domaines: Traitement du signal et de l'image [eess.SP]; Optique / photonique

Ali Waqar Azim, Yannis Le Guennec, Ghislaine Maury. Spectrally Augmented Hartley Transform Precoded Asymmetrically Clipped Optical OFDM for VLC. IEEE Photonics Technology Letters, 2018, 30 (23), pp.2029-2032. ⟨10.1109/LPT.2018.2874962⟩. ⟨hal-01954531⟩