Enhanced channel estimation method and user equipment performing the same

A user equipment (UE) for performing channel estimation, the UE comprising:

• a transceiver to transmit and receive a radio signal;
• and
• a processor coupled to the transceiver and configured to control the transceiver,
• wherein the processor is further configured to:
• control the transceiver to receive first configuration information and second configuration information,
• wherein the first configuration information relates to a channel state information reference signal (CSI-RS), which is allocated to a first resource element of a subframe,
• wherein the second configuration information relates to a second reference signal, which is used for time tracking and is allocated on the same slot of the same subframe as the CSI-RS,
• wherein the second reference signal is allocated to a second resource element of the subframe, and
• wherein at least one antenna port for the second reference signal is the same as at least one antenna port for the CSI-RS;
• estimate a channel state information (CSI) based on the CSI-RS;
• based on the second configuration information, determine whether to remove the second reference signal from the second resource element of the subframe;
• based on a determination result, remove the second reference signal from the second resource element of the subframe;
• and
• decode a data signal, which has been multiplexed with the removed second reference signal in the second resource element, based on the estimated CSI.