Filtered Asymmetrically Clipped Optical-OFDM with Index Modulation for Optical Wireless Systems

Ali Waqar Azim (1) , Yannis Le Guennec (2) , Marwa Chafii (3) , Laurent Ros (2)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
2 GIPSA-GAIA - GIPSA Pôle Géométrie, Apprentissage, Information et Algorithmes
3 ETIS - UMR 8051 - Equipes Traitement de l'Information et Systèmes

In this letter, we present filtered asymmetrically clipped optical-orthogonal frequency-division multiplexing with index modulation (FACO-OFDM-IM) for optical wireless systems. FACO-OFDM-IM optimizes the baseband bandwidth by filtering out-of-band spectral leakage caused by clipping. Additionally, IM enables FACO-OFDM-IM to impart granularity for spectral efficiency (SE)/energy efficiency (EE) trade-off and to achieve higher SE over established counterparts. Hereby, we elucidate the transceiver architecture, SE/EE trade-off, and bit-error-rate (BER). Simulation results establish that FACO-OFDM-IM attains higher spectral efficiences than classical IM approaches and outperforms them for low alphabet cardinalities while marginally increasing the complexity.

Mots clés: Discrete Fourier transform; orthogonal frequency-division multiplexing; index modulation; intensity modulation and direct detection; optical wireless systems; Internet-of-Things

Domaines: Traitement du signal et de l'image [eess.SP]

Ali Waqar Azim, Yannis Le Guennec, Marwa Chafii, Laurent Ros. Filtered Asymmetrically Clipped Optical-OFDM with Index Modulation for Optical Wireless Systems. IEEE Communications Letters, 2021, 5 (5), pp.1592-1595. ⟨10.1109/LCOMM.2020.3048894⟩. ⟨hal-03097509⟩