Method and arrangement relating to the insertion of pilot...

H - Electricity – 04 – L

Patent

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H04L 27/26 (2006.01)

Patent

CA 2660654

The present invention relates to a method and arrangement for enhancing efficiency of transmission using Single Channel - Frequency Division Multiple Access (SC-FDMA). The method comprises the step of: applying a Discrete Fourier Transformation (DFT) of time signal providing No samples in a first resulting signal, inserting N1 pilot tones in sai resulting signal providing No+N1 tones, Interpolating said signal provided with No+N1 tones to a required size, N, by insertion of zero bins in a middle section of said DFT providing a modified signal, applying Inversed Fast Fourier Transform (IFFT) on said modified signal, and performing a cyclic prefix insertion before transmitting the modified signal. Thus, similar equalising techniques as for OFDM are possible for efficacy signal reception.

La présente invention se rapporte à un procédé et à un agencement destinés à améliorer le rendement d'émission en utilisant un accès avec multiplexage en fréquence à canal unique (SC-FDMA). Le procédé comprend les étapes consistant à : appliquer une transformation de Fourier discrète (DFT) créant No échantillons dans un premier signal résultant, insérer N1 tonalités pilotes dans ledit signal résultant en créant No + N1 tonalités, réaliser une interpolation dudit signal doté de No + N1 tonalités jusqu'à une taille requise, N, par l'insertion de zéros binaires dans une section médiane de ladite transformée DFT en créant un signal modifié, appliquer une transformation de Fourier rapide inverse (IFFT) sur ledit signal modifié et effectuer une insertion cyclique de préfixes avant de transmettre le signal modifié. Ainsi, des techniques semblables d'égalisation telles que pour le multiplexage OFDM sont possibles en vue d'une réception de signal efficace.

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