H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 11/00 (2006.01)
Patent
CA 2679187
A base station device is used in a mobile communication system which employs the OFDM method for the downstream link. The base station device includes: means for creating a transmission signal by performing the inverse Fourier transform on a signal obtained by mapping the first signal and the second signal to a subcarrier with different transmission power densities; and means for transmitting the transmission signal to a user device. A subcarrier to which mapping of a second signal is inhibited (inhibited subcarrier) is decided so as to maintain the transmission power density of the second signal between a plurality of OFDM symbols, which does not depend on whether the OFDM symbol which contains the second signal also contains a first signal. The inhibit subcarrier is decided according to the subcarrier to which the first signal is to be mapped.
Selon l'invention, un dispositif de station de base est utilisé dans un système de communication mobile qui utilise le procédé MROF pour la liaison descendante. Le dispositif de station de base comprend un dispositif conçu pour générer un signal de transmission par application de la transformée inverse de Fourier sur un signal obtenu par correspondance du premier et du second signal avec une sous-porteuse au moyen de différentes densités de puissance de transmission, et un dispositif conçu pour transmettre le signal de transmission à un dispositif d'utilisateur. Une sous-porteuse avec laquelle la correspondance d'un second signal est interdite (sous-porteuse interdite) est déterminée de manière à maintenir la densité de puissance de transmission du second signal entre plusieurs symboles MROF, indépendamment du fait que le symbole MROF comprenant le second signal comprend ou non un premier signal. La sous-porteuse interdite est déterminée suivant la sous-porteuse avec laquelle le premier signal doit être mis en correspondance.
Higuchi Kenichi
Ishii Hiroyuki
Ntt Docomo Inc.
Oyen Wiggs Green & Mutala Llp
LandOfFree
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