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Article Dans Une Revue IEEE Wireless Communications Letters Année : 2021

LACO-OFDM with Index Modulation for Optical Wireless Systems

Résumé

In this letter, we propose layered asymmetrically clipped optical-orthogonal frequency-division multiplexing (LACO-OFDM) with index modulation (IM), i.e., LACO-OFDM-IM for optical wireless systems. In classical LACO-OFDM, the spectral leakage because of out-of-band clipping harmonics increases the baseband bandwidth (BB) resulting in lower spectral efficiencies. For LACO-OFDM-IM, we use IM and optimize the BB by filtering the out-of-band clipping harmonics. This amalgamation of IM and BB optimization leads to better spectral efficiency (SE). Simulation results shall affirm that LACO-OFDM-IM achieves higher SE, affords a comprehensive granularity for SE/energy efficiency trade-off, and outperforms classical alternatives in terms of bit-error-rate in both line-of-sight and time-dispersive channels.
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Dates et versions

hal-03082081 , version 1 (18-12-2020)

Identifiants

Citer

Ali Waqar Azim, Yannis Le Guennec, Marwa Chafii, Laurent Ros. LACO-OFDM with Index Modulation for Optical Wireless Systems. IEEE Wireless Communications Letters, 2021, 10 (3), pp.664 - 667. ⟨10.1109/LWC.2020.3045119⟩. ⟨hal-03082081⟩
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