Radio transmission device and radio transmission method

H - Electricity – 04 – B

Patent

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Details

H04B 1/707 (2011.01) H04W 28/04 (2009.01) H04J 11/00 (2006.01) H04L 1/18 (2006.01)

Patent

CA 2695149

It is possible to improve the CQI reception performance even when a delay is caused in a propagation path, a transmission timing error is caused, or a residual interference is generated between cyclic shift amounts of different ZC sequences. For the second symbol and the sixth symbol of the ACK/NACK signal which are multiplexed by RS of CQI, (+, +) or (-, -) is applied to a partial sequence of the Walsh sequence. For RS of CQI transmitted from a mobile station, + is added as an RS phase of the second symbol and - is added as an RS phase of the sixth symbol. A base station (100) receives multiplexed signals of ACK/NACK signals and CQI signals transmitted from a plurality of mobile stations. An RS synthesis unit (119) performs synthesis by aligning the RS phase of CQI.

La présente invention permet d'améliorer l'efficacité de réception de l'indicateur de qualité de canal (CQI) même lorsqu'un retard est provoqué dans un trajet de propagation, lorsqu'une erreur de synchronisation de transmission est provoquée ou lorsqu'une interférence résiduelle est générée entre des quantités de décalage cyclique de différentes séquences ZC. Pour le second symbole et le sixième symbole du signal d'acquittement/non acquittement (ACK/NACK) qui sont multiplexés par RS de CQI, (+, +) ou (-, -) est appliqué à une séquence partielle de la séquence de Walsh. Pour RS de CQI transmis à partir d'une station mobile, + est ajouté en tant que phase RS du second symbole et - est ajouté en tant que phase RS du sixième symbole. Une station de base (100) reçoit des signaux multiplexés de signaux ACK/NACK et de signaux CQI transmis à partir d'une pluralité de stations mobiles. Une unité de synthèse RS (119) effectue une synthèse par alignement de la phase RS de CQI.

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