Wireless communication apparatus, and feedback information...

H - Electricity – 04 – B

Patent

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H04B 7/06 (2006.01) H04J 99/00 (2009.01) H04B 7/04 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2606377

A wireless communication apparatus that allows propagation path information to be reproduced with high precision at a transmitting end without increasing feedback information amount. In this apparatus, a channel estimating part (103) uses a received pilot signal to perform channel estimation for each propagation path. A correlation detecting part (104) uses the result of the channel estimation to obtain correlation values between the channels, thereby detecting correlation values of all channels. An amplitude/phase ratio determining part (105) determines, based on the correlation values, the quantization bit ratio of the amplitude and phase of propagation path information to be used when those amplitude and phase are quantized. A feedback information generating part (106) quantizes the propagation path information in accordance with the determined ratio of the amplitude and phase.

L~invention concerne un appareil de communication sans fil qui permet aux informations de chemin de propagation d~être reproduites avec une précision élevée à une extrémité de transmission sans augmenter le volume des informations de retour. Dans cet appareil, un élément d~estimation de canal (103) utilise un signal pilote reçu pour effectuer une estimation de canal pour chaque chemin de propagation. Un élément de détection de corrélation (104) utilise le résultat de l~estimation de canal pour obtenir des valeurs de corrélation entre les canaux, détectant ainsi les valeurs de corrélation de tous les canaux. Un élément de détermination de rapport amplitude/phase (105) détermine, sur la base des valeurs de corrélation, le rapport de bits de quantification de l~amplitude et de la phase des informations de chemin de propagation utilisées lorsque cette amplitude et cette phase sont quantifiées. Un élément de création d~informations de retour (106) quantifie les informations de chemin de propagation selon le rapport défini d~amplitude et de phase.

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