H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 99/00 (2009.01) H04W 16/28 (2009.01) H04B 7/04 (2006.01) H04J 11/00 (2006.01)
Patent
CA 2707748
A user apparatus in a multi input multi output (MIMO) mobile communications system using pre-encoding is disclosed. The user apparatus includes a PMI generator which generates, in accordance with a radio propagation condition, a pre-encoding matrix indicator (PMI) which indicates a pre-encoding matrix to be used by a base station; a delay circuit which takes, as an input, the PMI and which outputs the PMI after a predetermined delay period has elapsed; an accumulating unit which takes, as an input, the PMI from the delay circuit and stores the input PMI; and a channel estimator which, on a signal from the base station, performs channel estimation using the PMI stored in the accumulating unit.
L'invention porte sur un dispositif d'utilisateur utilisé dans un système de communication mobile MIMO de précodage. Le dispositif d'utilisateur comporte: une unité de création d'un PMI (indicateur de matrice de précodage) indiquant la matrice de précodage à utiliser par une station de base, conformément à un état de propagation radio; un circuit à retard que saisit le PMI et l'émet après un temps prédéterminé; une unité d'accumulation qui saisit le PMI dans le circuit à retard et le stocke; et une unité d'évaluation d'un canal utilisant le PMI stocké dans l'unité d'accumulation, en réponse à un signal de la station de base.
Higuchi Kenichi
Miki Nobuhiko
Sawahashi Mamoru
Taoka Hidekazu
Ntt Docomo Inc.
Oyen Wiggs Green & Mutala Llp
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