Method for transmitting/receiving reference signal in wireless communication system, and device therefor

A method for transmitting, by a terminal, a reference signal in a wireless communication system, the method comprising:

• generating a demodulation reference signal (DMRS) sequence;
• mapping the generated DMRS sequence to a resource block,
• wherein the DMRS sequence is mapped on the same time axial symbol and each transmitted on a specific antenna port, and
• wherein the position of the time axial symbol to which the DMRS is mapped is determined according to a slot format or the last symbol on which downlink data is transmitted;
• and
• transmitting, to a base station, the mapped DMRS sequence by using different antenna ports.

A terminal performing decoding in a wireless communication system, the terminal comprising:

• a radio frequency (RF) unit transmitting and receiving a radio signal to and from the outside;
• and
• a processor functionally coupled with the communication unit,
• wherein the processor is configured to
• receive a first demodulation reference signal (DMRS) and a second DMRS configured according to particular patterns via DMRS symbols from a base station,
• wherein the first DMRS and the second DMRS are respectively transmitted on particular antenna ports and are positioned on the same time axial symbol as that of at least one other DMRS transmitted on another antenna port, and
• wherein the position of the time axial symbol of the second DMRS is determined according to a slot format or the last symbol on which downlink data is transmitted, and
• decode the data by using at least one of the first DMRS or the second DMRS.