IMPROVED COMP TRANSMISSION WITH REDUCED INTERFERENCES

摘要

A base station device includes a precoding processor that conducts the same precoding process on a control channel and a reference signal, a base station device controller that sets a plurality of regions, being an region of resources in which the reference signal is placed and the control channel is potentially placed, for which a common precoding process is used within an region, and different precoding processes are used among different regions, and a transmit processor that uses resources in an region to transmit the control channel and the reference signal. A mobile station device includes a mobile station device controller that sets the region on the basis of announced information from the base station device, a propagation channel estimator that averages propagation channel variation estimation values estimated from a plurality of the reference signals within the region, and a control channel detector that conducts a process of using the averaged propagation channel estimation values to detect the control channel that includes control information addressed to the mobile station device itself.