A method for a user equipment, UE, to measure a channel in a wireless communication system, the method comprising: receiving a reference signal transmitted on part of first polarization antenna ports and part of second polarization antenna ports within a cross-polarization two-dimensional, 2D, antenna port array from an eNB; wherein the cross-polarization 2D antenna port array comprises the first polarization antenna ports and the second polarization antenna ports, and wherein a first polarization antenna port and a second polarization antenna port, used for the transmission of the reference signal, are located in a row or column of a boundary within the cross-polarization 2D antenna port array, measuring a channel for the part of the first polarization antenna ports based on the reference signal received from the eNB; reconstructing (S 1904) channels for all of the first polarization antenna ports within the 2D antenna port array by reconstructing a channel for a first polarization antenna port not used for the transmission of the reference signal within the cross-polarization 2D antenna port array using the channel measurement result related to the part of first polarization antenna ports, wherein the channel for a first polarization antenna port not used for the transmission of the reference signal is reconstructed by interpolating or extrapolating the channel measurement result related to the part of first polarization antenna ports; measuring a channel for the part of the second polarization antenna ports based on the reference signal received from the eNB; and reconstructing (S 1904) channels for all of the second polarization antenna ports using (i) the reconstructed channels for the all of the first polarization antenna ports and (ii) the channel measurement result related to the part of the second polarization antenna ports, wherein the channels for the all of the second polarization antenna ports are reconstructed based on Kronecker Product between the channel measurement result related to the part of the second polarization antenna ports and a channel matrix of the reconstructed channels for the all of the first polarization antenna ports. receiving a reference signal transmitted on part of first polarization antenna ports and part of second polarization antenna ports within a cross-polarization two-dimensional, 2D, antenna port array from an eNB; wherein the cross-polarization 2D antenna port array comprises the first polarization antenna ports and the second polarization antenna ports, and wherein a first polarization antenna port and a second polarization antenna port, used for the transmission of the reference signal, are located in a row or column of a boundary within the cross-polarization 2D antenna port array, measuring a channel for the part of the first polarization antenna ports based on the reference signal received from the eNB; reconstructing (S 1904) channels for all of the first polarization antenna ports within the 2D antenna port array by reconstructing a channel for a first polarization antenna port not used for the transmission of the reference signal within the cross-polarization 2D antenna port array using the channel measurement result related to the part of first polarization antenna ports, wherein the channel for a first polarization antenna port not used for the transmission of the reference signal is reconstructed by interpolating or extrapolating the channel measurement result related to the part of first polarization antenna ports; measuring a channel for the part of the second polarization antenna ports based on the reference signal received from the eNB; and reconstructing (S 1904) channels for all of the second polarization antenna ports using (i) the reconstructed channels for the all of the first polarization antenna ports and (ii) the channel measurement result related to the part of the second polarization antenna ports, wherein the channels for the all of the second polarization antenna ports are reconstructed based on Kronecker Product between the channel measurement result related to the part of the second polarization antenna ports and a channel matrix of the reconstructed channels for the all of the first polarization antenna ports.