In a mobile communication system, a base station performs downlink multi-antenna transmission by applying a precoder matrix for defining downlink transmission directivity. The mobile communication system includes a first user terminal that selects one of first precoder matrix information and second precoder matrix information as precoder matrix information to be fed back to the base station. The precoder matrix information is referred to determine, in the base station, the precoder matrix to be applied to transmission to a second user terminal that establishes a connection with the base station. The first precoder matrix information indicates the precoder matrix that is preferred to the first user terminal. The second precoder matrix information indicates the precoder matrix that is not preferred to the first user terminal.