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Perfect Reconstruction Conditions and Design of Oversampled DFT-Modulated Transmultiplexers

EURASIP Journal on Advances in Signal Processing volume 2006, Article number: 015756 (2006) Cite this article

Abstract

This paper presents a theoretical analysis of oversampled complex modulated transmultiplexers. The perfect reconstruction (PR) conditions are established in the polyphase domain for a pair of biorthogonal prototype filters. A decomposition theorem is proposed that allows it to split the initial system of PR equations, that can be huge, into small independent subsystems of equations. In the orthogonal case, it is shown that these subsystems can be solved thanks to an appropriate angular parametrization. This parametrization is efficiently exploited afterwards, using the compact representation we recently introduced for critically decimated modulated filter banks. Two design criteria, the out-of-band energy minimization and the time-frequency localization maximization, are examined. It is shown, with various design examples, that this approach allows the design of oversampled modulated transmultiplexers, or filter banks with a thousand carriers, or subbands, for rational oversampling ratios corresponding to low redundancies. Some simulation results, obtained for a transmission over a flat fading channel, also show that, compared to the conventional OFDM, these designs may reduce the mean square error.

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Authors and Affiliations

  1. Laboratoire des Images et des Signaux (LIS), Université Joseph Fourier, Saint Martin d'Hères Cedex, 38402, France

    Cyrille Siclet

  2. Laboratoire RESA/BWA, Division Recherche et Développement, France Télécom, 4 rue du Clos Courtel, Cesson Sévigné Cedex, 35512, France

    Pierre Siohan

  3. Laboratoire Mathématiques pour l'Industrie et la Physique (MIP), Université Paul Sabatier, Toulouse 3, Toulouse Cedex 9, 31062, France

    Didier Pinchon

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  1. Cyrille Siclet
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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Siclet, C., Siohan, P. & Pinchon, D. Perfect Reconstruction Conditions and Design of Oversampled DFT-Modulated Transmultiplexers. EURASIP J. Adv. Signal Process. 2006, 015756 (2006). https://doi.org/10.1155/ASP/2006/15756

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