Radio communication device and radio communication method configured for channel quality reporting of selected sub-carrier bands

A wireless communication apparatus comprising:

• a radio receiver configured to acquire, from a base station, a first information indicating a fixed number identifying quantity of sub-carrier bands to be selected for channel quality reporting;
• a reception quality measurer coupled to the radio receiver and configured to measure channel quality of each of a plurality of sub-carrier bands within a communication band from a received signal;
• a subcarrier selector coupled to the radio receiver and configured to select sub-carrier bands from the plurality of sub-carrier bands based on the measured channel quality, wherein quantity of the selected sub-carrier bands matches the quantity of sub-carrier bands identified by the fixed number indicated by the first acquired information;
• a modulator configured to modulate a second information indicating channel quality of the selected sub-carrier bands according to a modulation scheme and a third information indicating positions of the selected sub-carrier bands according to the modulation scheme;
• and
• a radio transmitter configured to report to the base station the second and third modulated information.