A method used in a User Equipment, UE, for estimating a frequency offset between a Cell-specific Reference Signal, CRS, of a serving cell of the UE and a DeModulation-Reference Signal, DM-RS, of a data transmission to be decoded by the UE, using a set of quasi-co-located reference signals, the method being characterized by comprising: comparing (S410) a number of Resource Blocks, RBs, for the data transmission to a first threshold wherein the first threshold is a fixed integer or a function of the number of RBs of the data transmission and/or of a Signal to Noise Ratio/Signal to Noise and Interference Ratio, SNR/SINR, level of the data transmission; selecting (S430) one or more quasi-co-located reference signals from the set of quasi-co-located reference signals based on a result of the comparison; and estimating (S440) the frequency offset based on the selected one or more quasi-co-located reference signals, wherein the set of quasi-co-located reference signals includes: the DM-RS; Channel State Information Reference Signal, CSI-RS, which is quasi-co-located with the DM-RS with respect to the frequency offset; and the CRS, which is quasi-co-located with the DM-RS with respect to the frequency offset, wherein the DM-RS is selected from the set of quasi-co-located reference signals when the number of RBs is larger than the first threshold, and the CRS is selected from the set of quasi-co-located reference signals only when the number of RBs is smaller than or equal to the first threshold. comparing (S410) a number of Resource Blocks, RBs, for the data transmission to a first threshold wherein the first threshold is a fixed integer or a function of the number of RBs of the data transmission and/or of a Signal to Noise Ratio/Signal to Noise and Interference Ratio, SNR/SINR, level of the data transmission; selecting (S430) one or more quasi-co-located reference signals from the set of quasi-co-located reference signals based on a result of the comparison; and estimating (S440) the frequency offset based on the selected one or more quasi-co-located reference signals, wherein the set of quasi-co-located reference signals includes: the DM-RS; Channel State Information Reference Signal, CSI-RS, which is quasi-co-located with the DM-RS with respect to the frequency offset; and the CRS, which is quasi-co-located with the DM-RS with respect to the frequency offset, wherein the DM-RS is selected from the set of quasi-co-located reference signals when the number of RBs is larger than the first threshold, and the CRS is selected from the set of quasi-co-located reference signals only when the number of RBs is smaller than or equal to the first threshold. the DM-RS; Channel State Information Reference Signal, CSI-RS, which is quasi-co-located with the DM-RS with respect to the frequency offset; and the CRS, which is quasi-co-located with the DM-RS with respect to the frequency offset, wherein the DM-RS is selected from the set of quasi-co-located reference signals when the number of RBs is larger than the first threshold, and the CRS is selected from the set of quasi-co-located reference signals only when the number of RBs is smaller than or equal to the first threshold. <EOS>