METHOD FOR REDUCING COMPLEXITY OF MIMO RECEIVER WHICH SHARES PREPROCESSING FILTER IN A GROUP UNIT BY

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Disclosed is a method for processing a reception signal, and a MIMO receiver, the method comprising a step in which : a reference resource element (RE) is selected within an RE group that comprises a plurality of REs; generated is a preprocessing filter which will be shared by the plurality of REs in the RE group on the basis of channel information of the reference RE; on the basis of channel information of the plurality of REs other than the reference RE, generated is a covariance matrix with respect to each of the REs other than the reference RE; and reception signals with respect to each of the plurality of REs are offset by selectively using the preprocessing filter and the covariance matrix, and thereby detection signals with respect to the RE group are generated.