Cancellation of Nonlinear Inter-Carrier Interference in OFDM Systems with Nonlinear Power-Amplifiers

Abstract : Due to a high peak-to-average power ratio (PAPR), orthog- onal frequency division multiplexing (OFDM) signals are often driven at the nonlinear region of power amplifiers (PAs). As a consequence, the orthogonality between the subcarriers is broken and nonlinear inter-carrier interference (ICI) is introduced. In this paper, we propose two techniques for canceling nonlinear ICI in wireless OFDM communication systems with nonlinear PAs. The proposed techniques are based on the concept of power diversity, which consists in a transmission scheme that re-transmits the symbols several times with a different transmission power each time. The main advantage of using the power diversity is that the problem of canceling the nonlinear ICI can be viewed as a source separation problem, where the ICI terms correspond to \virtual" sources. The proposed techniques are able to provide a more robust transmission at the cost of a lower transmission rate.
Type de document :
Communication dans un congrès
Ninth Int. Conf. on Latent Variable Analysis and Signal Separation (LVA/ICA'2010), Sep 2010, Saint Malo, France. pp.337-345, 2010
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https://hal.archives-ouvertes.fr/hal-00719261
Contributeur : Gérard Favier <>
Soumis le : jeudi 19 juillet 2012 - 14:08:10
Dernière modification le : jeudi 19 juillet 2012 - 14:08:10

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  • HAL Id : hal-00719261, version 1

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Carlos Alexandre Rolim Fernandes, João Mota, Gérard Favier. Cancellation of Nonlinear Inter-Carrier Interference in OFDM Systems with Nonlinear Power-Amplifiers. Ninth Int. Conf. on Latent Variable Analysis and Signal Separation (LVA/ICA'2010), Sep 2010, Saint Malo, France. pp.337-345, 2010. 〈hal-00719261〉

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