Patent ID: 8553670

Claim:
A radio communication device for performing radio communication using OFDMA (Orthogonal Frequency Division Multiple Access) system, in which a plurality of user allocated regions are allocated to multiple users at a same time, the device comprising: a SMI (Sample Matrix Inversion) weight deriving unit for calculating a correlation matrix and a correlation vector using a plurality of received signal vectors as sample values, and deriving a SMI weight based on said calculated correlation matrix and correlation vector; and a weight multiplying unit for multiplying said received signal vector by the SMI weight derived by said SMI weight deriving unit to extract a desired signal, wherein said SMI weight deriving unit uses the plurality of received signal vectors included in one user allocated region among the plurality of user allocated regions in the OFDMA system as a sample value, the one user allocated region being a part or an whole of a region allocated for one user, the plurality of received signal vectors including received signal vectors of respectively different subcarriers, discontinuous in time, and thereby derives the SMI weight for said user allocated region, wherein multiple users access the allocated regions at a same time.