Method for transmitting and receiving reference signal in wireless communication system and apparatus therefor

A method for receiving, by a UE, a demodulation reference signal (DMRS) in a wireless communication system, the method comprising:

• receiving a sequence of the DMRS mapped into resource elements of each of layers through each of antenna ports corresponding to the each of the layers;
• and
• decoding a physical downlink shared channel (PDSCH) on the basis of the sequence of the DMRS,
• wherein when a number of the layers exceeds a predetermined number, the sequence of the DMRS is mapped into the resource elements in accordance with a pattern on at least two bundled consecutive resource blocks.

An eNB for transmitting a demodulation reference signal (DMRS) in a wireless communication system, the eNB comprising:

• a processor for generating a sequence of the DMRS and mapping the sequence of the DMRS into resource elements of each of layers;
• and
• a transmitter for transmitting the sequence of the DMRS mapped into the resource elements through each of antenna ports corresponding to the each of the layers,
• wherein the processor maps the sequence of the DMRS into the resource elements in accordance with a pattern on at least two bundled consecutive resource blocks if a number of the layers exceeds a predetermined number.