Long term evolution (lte) radio link timing synchronization

Details Long term evolution (lte) radio link timing synchronization Long term evolution (lte) radio link timing synchronization

H - Electricity

04

W

H04W 56/00 (2009.01) H04W 88/02 (2009.01) H04W 88/08 (2009.01)

Patent

CA 2735007

A method for performing a radio link timing estimation for synchronization to a wireless communications channel such as an uplink channel in a 3GPP Long Term Evolution (LTE) network in a mobile wireless device or wireless network base station is provided. A channel frequency response estimate from a received reference signal comprising multiple non coherent Orthogonal Frequency Division Multiplexing (OFDM) symbols is obtained. A frequency response covariance matrix from the channel frequency response estimate is then generated. Timing offsets of the received reference signal using covariance matrix and timing offset estimation algorithms are then estimated.

L'invention concerne un procédé visant à effectuer une estimation de bases de temps de liaisons radio en vue de la synchronisation dun canal de communications sans fil tel quun canal montant au sein dun réseau de type « Long Term Evolution » (LTE) au sens du 3GPP, dans un dispositif sans fil mobile ou une station de base de réseau sans fil. Une estimation de réponse fréquentielle de canal est obtenue à partir dun signal de référence reçu comportant des symboles multiples non-cohérents de multiplexage orthogonal par répartition en fréquences (OFDM). Une matrice de covariance de réponse fréquentielle est ensuite générée à partir de lestimation de réponse fréquentielle de canal. Des décalages de base de temps du signal de référence reçu sont alors estimés à laide de la matrice de covariance et dalgorithmes destimation de décalage des bases de temps.

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