Method and apparatus for parallel midamble cancellation

Details Method and apparatus for parallel midamble cancellation Method and apparatus for parallel midamble cancellation

H - Electricity

03

D

H03D 1/04 (2006.01) H04B 1/707 (2006.01) H04L 25/03 (2006.01) H04J 13/00 (2006.01)

Patent

CA 2485575

Method and apparatus for performing midamble cancellation (14) to remove midamble interference from the convolution tail of data field (I) and the first W-1 chips of the midamble field which results from the delay spread of the multipath channel and for cancelling the first W-1 chip midamble spread in the data field (II), which are performed substantially simultaneously. The received burst, typical a TDD burst, is stored, the midamble interference and the corresponding parts in the received burst are removed and the resulting burst is applied to a multi-user detector (20) to obtain the symbol sequences.

L'invention concerne un procédé et un appareil permettant de réaliser une annulation de <= midamble >= afin d'éliminer une interférence de <= midamble >= provenant de la queue de convolution du champ de données (1) et des premières puces W-1 du champ de <= midamble >=, ce qui se solde par un défilement du temps de propagation ducanal à plusieurs voies. Cet appareil permet aussi d'annuler le défilement de midamble des premières puces W-1 dans le champ de données (2), dont les opérations sont réalisées pratiquement simultanément. La salve reçue, généralement une salve DRT, est stockée, l'interférence de <= midamble >= et les parties correspondantes dans la salve reçue sont éliminées et la salve résultante est appliquée au détecteur multi-utilisateurs de manière à obtenir les séquences de symboles.

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