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Etude de nouvelles techniques de réduction du " facteur de crête " (PAPR) à compatibilité descendante pour les systèmes multiporteuses

Abstract : OFDM (Orthogonal Frequency Division Multiplexing) is a sophisticated multicarrier modulation technique used in the field of wireless communication enabling current technologies to achieve a high transmission rate. It is used in most communication standards such as DAB, DVB-T, Wireless Local Area Networks (WLAN), WiMAX. It is undergoing standardization in the LTE (Long Term Evolution) standard for the fourth generation mobile (4G). The major drawback of OFDM is that it generates temporal signals with high amplitude variations characterized by a high PAPR (Peak-to-Average Power Ratio) This feature makes the OFDM signals very sensitive to non-linearities of analog components, particularly those of the High Power Amplifier (HPA). The objective of this thesis has been to develop and analyze techniques for PAPR reduction known as ''adding signal'' which are backwards compatible. These techniques have been developed in order to satisfy the constraints (consumption and integration) of an embedded system. In this thesis, we first studied theoretically the performance of ''adding signal'' techniques known as distortion techniques, and then we developed two new backwards compatible ''adding signal'' techniques.
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https://tel.archives-ouvertes.fr/tel-00441566
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Submitted on : Wednesday, December 16, 2009 - 3:22:41 PM
Last modification on : Wednesday, April 27, 2022 - 4:03:18 AM
Long-term archiving on: : Thursday, June 17, 2010 - 11:46:09 PM

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  • HAL Id : tel-00441566, version 1

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Désiré Guel. Etude de nouvelles techniques de réduction du " facteur de crête " (PAPR) à compatibilité descendante pour les systèmes multiporteuses. Traitement du signal et de l'image [eess.SP]. Université Rennes 1, 2009. Français. ⟨tel-00441566⟩

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