Method for the time- and frequency-domain synchronisation of...

Details Method for the time- and frequency-domain synchronisation of... Method for the time- and frequency-domain synchronisation of...

H - Electricity

04

L

H04L 7/04 (2006.01) H04B 3/54 (2006.01) H04J 11/00 (2006.01) H04L 7/00 (2006.01)

Patent

CA 2512920

The invention relates to a method for the time- and frequency-domain synchronisation of multiple devices in a transmission system with OFDM modulation. The inventive method can be used for the synchronisation of multiple users, by employing the improvement to the estimate of the OFDM symbol start and the improvement to the estimate of the frequency error in noisy environments or with frequency-selective channels. The invention is characterised by the decomposition of the signals received x(n), which contain the synchronism sequences and data, into frequency bands (M) and by the application of synchronisation algorithms to each of said bands.

L'invention concerne un procédé de synchronisation dans le domaine du temps et de la fréquence de multiples équipements de transmission à modulation OFDM permettant la synchronisation de multiples utilisateurs au moyen de l'amélioration de l'estimation du début de symboles OFDM et de l'amélioration de l'estimation de l'erreur de fréquence dans des environnements bruyants ou dans des voies sélectives en fréquence. L'invention est caractérisée par la décomposition des signaux reçus x(n), qui contiennent les données et séquences de synchronisme, sous forme de bandes de fréquence (M) et par l'application d'algorithmes de synchronisation sur chacune desdites bandes.

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