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

A terminal demodulating data 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 RF unit,
• wherein the processor is configured to
• receive, from a base station, configuration information related to a configuration of a demodulation reference signal for demodulating the data,
• receive, from the base station, the demodulation reference signal transmitted through a plurality of antenna ports based on the configuration information, and
• demodulate the data by using the received demodulation reference signal,
• wherein the demodulation reference signal is mapped to an Orthogonal Frequency Division Multiplexing (OFDM) symbol according to a specific pattern and multiplexed through a Code Division Multiplexing scheme, and
• wherein in the Code Division Multiplexing scheme, a cyclic shift code is applied in a frequency domain and an orthogonal cover code is applied in a time domain.