Patent ID: 7983351

Claim:
A communication apparatus that uses a plurality of frequency channels to perform multi-carrier transmission, the communication apparatus serving as a reception communication apparatus, comprising: a plurality of reception antennas; a grouping controlling unit that configures a plurality of layers including the plurality of frequency channels to perform control for hierarchically grouping the plurality of frequency channels so that the number of frequency channels included in a group of a layer becomes smaller than the number of frequency channels included in a group of a layer immediately above; a propagation path information estimating unit that estimates propagation path information of the plurality of frequency channels; an average value calculating unit that hierarchically groups the plurality of frequency channels under the control of the grouping controlling unit, the average value calculating unit calculating an average value of the propagation path information for each group in a highest layer with the use of propagation path information estimate values output from the propagation path information estimating unit, the average value calculating unit calculating propagation path information estimate values used in each layer based on an average value of a layer immediately above to calculate an average value of the propagation path information for each group in other layers with the use of the propagation path information estimate values of the each layer; and a feedback unit that feeds back an average value acquired in each group as feedback information to another communication apparatus serving as a transmission communication apparatus.