BASE STATION DEVICE, USER DEVICE, AND METHOD USED IN MOBILE COMMUNICATION SYSTEM

摘要

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.