PROBLEM TO BE SOLVED: To provide an enhanced channel quality information feedback system.SOLUTION: In one embodiment, e.g., user equipment (UE) comprises: a logic which at least partially exists in hardware and sets channel state information (CSI) so as to report a precoding matrix indicator (PMI), a rank instruction (RI) and a channel quality indicator (CQI) index for an orthogonal frequency division multiple access (OFDMA) frequency band, the logic acquiring the CQI index based on a channel state information (CSI) reference resource of a downlink shared channel including the same CRS overhead as a CRS overhead corresponding to the number of cell-specific reference signal (CRS) antenna ports of a serving cell of the UE; and a radio frequency (RF) transceiver for transmitting the CQI index on a radio uplink channel.SELECTED DRAWING: Figure 1
ENHANCED CHANNEL QUALITY INFORMATION FEEDBACK SYSTEM