Detection of access bursts in a random access channel

Details Detection of access bursts in a random access channel Detection of access bursts in a random access channel

H - Electricity

04

W

H04W 74/08 (2009.01) H04W 88/08 (2009.01)

Patent

CA 2660720

A technique for detecting one or more access bursts (112) in a random access channel (110) is described. Each access burst includes a transmission preamble, the transmission preamble being a member of a preamble set including sequences of preamble symbols that can be obtained by cyclically shifting a basic preamble sequence. A detector (118, 120) in a radio base station (108) determines correlation information indicative of a correlation of a single correlation preamble with each of the one or more received transmission preambles, wherein the correlation preamble is a member of the preamble set. The one or more access bursts are detected based on the correlation information.

La présente invention concerne une technique de détection d'au moins une rafale d'accès (112) dans un canal d'accès aléatoire (110). Chaque rafale d'accès comprend un préambule de transmission qui fait partie d'un ensemble de préambules incluant des séquences de symboles de préambule qui peuvent être obtenues par décalage cyclique d'une séquence de préambule de base. Un détecteur (118, 120) dans une station de base radio (108) détermine l'information de corrélation indicative d'une corrélation d'un seul préambule avec chacun d'au moins des préambules de transmission reçus,et dans lequel le préambule de corrélation fait partie de l'ensemble de préambules. Les rafales d'accès sont détectées en fonction de l'information de corrélation.

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