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ICT 2006, Funchal (Madère) : Portugal (2006)

Invertible Clipping for Increasing the Power Efficiency of OFDM Amplification

Salvatore Ragusa 1, Jacques Palicot 2, Yves Louët 2, Christian Lereau 1

(2006)

Large fluctuations of OFDM signal amplitude represent an important problem for power amplification in mobile communication systems. In this paper, we propose a new Peak-to-Average Power Ratio (PAPR) reduction method based on the well known clipping and filtering one. Called "invertible clipping", it is performed thanks to a "soft clipping function". Since this soft clipping can be inverted in reception side, degradations are compensated. The derived method benefits from the advantages of classical clipping and filtering method and exhibits small computational complexity as compared to other peak reduction methods. In this paper, we show, thanks to extensive simulation results, that our method offers a global gain, greater than 1 dB. That means that the power efficiency of the Power Amplifier (PA) increases of about 3.2 % which corresponds to a PA consumption gain of about 10 %.

1 :	France Télécom Recherche et Développement (FTR&D)
	France Télécom
2 :	Institut d'Electronique et de Télécommunications de Rennes (IETR)
	CNRS : UMR6164 – Université de Rennes 1 – INSA Rennes – SUPELEC

Équipe de recherche : SCEE - Equipe Signal, Communication et Electronique Embarquée

Domaine

:

Sciences de l'ingénieur/Autre

Mots Clés : OFDM – PAPR – clipping

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Contributeur : Yves Louet <>

Soumis le : Mercredi 5 Juillet 2006, 16:59:41

Dernière modification le : Mardi 10 Juin 2008, 15:54:01