received from 2 transmit antennas the ue 39 s antenna virtualization can be accomplished by combining the csi rss in a predefined rule for example when the signals are received from the csi rs antenna ports 1 2 3 4 5 6 7 and 9 the ue may combine the signals received from the csi rs antenna ports 1 2 3 and 4 into the csi rs for transmit antenna 1 and the signals received from the csi rs antenna ports 5 6 7 and 8 into the csi rs for transmit antenna 2 in this case the ue is capable of generating cqi under the assumption of the space time frequency block code of equation 2 it is also possible to combining the signals received from the csi rs antenna ports 1 3 5 and 7 into the csi rs for the transmit antenna 1 and the signals received from the csi rs antenna ports 2 4 6 and 8 into the csi rs for the transmit antenna 2 according to the negotiation between the ue and the enb it is also possible to multiply a constant value negotiated between the ue and the enb with the per antenna signal before combining the respective antenna signals fig1 is a time frequency grid illustrating an antenna virtualization in an rb for applying space time frequency block code according to an exemplary embodiment of the present invention referring to fig1 the ue receives csi rss transmitted from 8 antenna ports at the re positions 1300 p 1 and p 2 1310 p 5 and p 6 1320 p 3.