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The 2009 69th IEEE Vehicular Technology Conference (VTC), Barcelona : Espagne (2009)

Clipping formulated as an adding signal technique for OFDM Peak Power Reduction

Désiré Guel 1, Jacques Palicot 1

(02/2009)

Due to the simplest way for PAPR reduction, clipping technique have been proposed and seem to be promising for use in commercial systems. In this paper, the conventional clipping technique is formulated as an adding signal technique for PAPR reduction. We show that, when clipping occurs very rarely, the adding signal for PAPR reduction commonly called “peakreducing signal” or “peak-cancelling signal” is approximately the distortion term resulting in the nonlinear processing of the OFDM envelope. This result may be extended to all forms of clipping. Later in this paper, the performance of clipping is characterized by deriving an asymptotic PAPR distribution of the clipped signal and by proposing a simple closed form of its Signal to Noise-and-Distortion Ratio (SNDR) metric. These theoretical results corresponds to a special case of geometric method [1] which is an adding signal technique for PAPR reduction.

1 :	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/Traitement du signal et de l'image Informatique/Traitement du signal et de l'image

Mots Clés : Clipping technique – adding signal technique – Peak-to-Average Power Ratio (PAPR) – Orthogonal Frequency Division Multiplexing (OFDM).

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Contributeur : Myriam Andrieux <>

Soumis le : Mardi 10 Février 2009, 09:27:35

Dernière modification le : Mardi 10 Février 2009, 10:23:36