Patent ID: 7587172

Claim:
A method for transmitting data in multiuser Multiple-Input Multiple-Output (MIMO) systems in which a base station performs scheduling on the basis of feedback information received from a plurality of terminals, comprising: determining, at the base station, at least one best terminal for each transmit antenna on the basis of the feedback information; calculating a sum rate from the feedback information; deciding a precoding matrix and terminals for each transmit antenna, maximizing the sum rate; and performing transmission with the decided precoding matrix and terminals; wherein the best terminal for each antenna is determined by k i , j = arg ⁢ ⁢ max k ⁢ I ^ ⁢ { 1 , 2 , … , K } ⁢ r k , i , j , where r k,i,j is a received Signal to Noise Ratio (SNR) of kth terminal, i is an index of the precoding matrix, and I is an index of a column of the precoding matrix.