Patent attributes
A multi-carrier radio transmission system able to improve frequency utilization efficiency, and a transmission device and a reception device used in the multi-carrier radio transmission system are disclosed. In the transmission device, at least one sub-carrier set to be the virtual sub-carrier is dynamically designated according to sub-carrier arrangement information. The reception device used in the above system includes an adaptive array antenna unit that is adaptively controlled so that signal components associated with the virtual sub-carriers in the received signals are reduced, and a determination unit that determines a pattern to be used in communications among plural sub-carrier arrangement patterns in which at least some of virtual sub-carrier arrangements are different. Because the virtual sub-carrier arrangement patterns can be used as identification information of radio signals, it is possible to improve utilization of frequency resources compared to the related art.
