MOBILE TERMINAL DEVICE, AND WIRELESS COMMUNICATION METHOD

摘要

To provide a wireless communication method and a mobile terminal device capable of feeding back a precoder needed in generating a precoding weight in a downlink MIMO transmission. The present invention is characterized in that, in a first mode in which a subband second PMI selected by each Bandwidth part is fed back via a physical uplink control channel, the subband second PMI and a wideband second PMI are selected from a second code book, the subband second PMI and the wideband second PMI are multiplexed into a sub frame, and the multiplexed signal is sent to a wireless base station device via the aforementioned physical uplink control channel.