Method of operating a terminal and a base station, and a terminal

The serving (serving) matrix index for the channel (Precoding Matrix Index: PMI) for determining and considering only the channel interference channel CSI: serving the PMI and the CSI to generate (Channel State Information CSI) base station the method of operation of a terminal for feeding back the PMI and the base station and the terminal for designing a precoding vector based on the CSI is disclosed. Further, in consideration of only the interfering channel matrix index (Precoding Matrix Index: PMI) a decision, the serving (serving) channel state information for the channel: serving the PMI and the CSI to generate (Channel State Information CSI) the method of operating a base station and the terminal for designing a precoding vector based on the CSI terminal and the PMI and which feeds back to a base station is disclosed. Interference, CSI, PMI, terminal, base station, pre-coding, a feedback