Method for performing channel estimation using DMRS in wireless communication system, and apparatus therefor

A method for receiving a Demodulation Reference signal (DMRS) in a wireless communication system, the method performed by a terminal and comprising:

• receiving, from a base station, a configuration for resource block (RB) bundling,
• wherein an RB bundling unit comprises a plurality of RBs in the frequency domain,
• wherein a first RB included in the RB bundling unit is allocated for a specific signal and a second RB included in the RB bundling unit is allocated for a data channel,
• wherein, for the first RB, a DMRS collides with the specific signal at a first symbol in the time domain, the DMRS is shifted to a second symbol based on the collision, and
• wherein, for the second RB, a symbol location of a DMRS for the data channel, where there is no collision, is shifted based on a location of the second symbol,
• receiving, from the base station, information on the shifted symbol location of the DMRS for the data channel;
• and
• receiving, from the base station, the DMRS for the data channel on the shifted symbol location;
• and
• performing a channel estimation using the received DMRS for the data channel.

A base station configured for transmitting a Demodulation Reference signal (DMRS) in a wireless communication system, the base station comprising:

• a radio frequency (RF) transceiver transmitting and receiving a radio signal;
• and
• a processor functionally connected with the RF transceiver,
• wherein the processor is configured to:
• transmit, to a terminal, a configuration for resource block (RB) bundling,
• wherein an RB bundling unit comprises a plurality of RBs in the frequency domain,
• wherein a first RB included in the RB bundling unit is allocated for a specific signal and a second RB included in the RB bundling unit is allocated for a data channel,
• wherein, for the first RB, a DMRS collides with the specific signal at a first symbol in the time domain, the DMRS is shifted to a second symbol based on the collision, and
• wherein, for the second RB, a symbol location of a DMRS for the data channel, where there is no collision, is shifted based on a location of the second symbol,
• transmit, to the terminal, information on the shifted symbol location of the DMRS for the data channel, and
• transmit, to the terminal, the DMRS for the data channel on the shifted symbol location.

A terminal configured for receiving a Demodulation Reference signal (DMRS) in a wireless communication system, the terminal comprising:

• a radio frequency (RF) transceiver transmitting and receiving a radio signal;
• and
• a processor functionally connected with the RF transceiver,
• wherein the processor is configured to:
• receive, from a base station, a configuration for resource block (RB) bundling,
• wherein an RB bundling unit comprises a plurality of RBs in the frequency domain,
• wherein a first RB included in the RB bundling unit is allocated for a specific signal and a second RB included in the RB bundling unit is allocated for a data channel,
• wherein, for the first RB, a DMRS collides with the specific signal at a first symbol in the time domain, the DMRS is shifted to a second symbol based on the collision, and
• wherein, for the second RB, a symbol location of a DMRS for the data channel, where there is no collision, is shifted based on a location of the second symbol,
• receive, from the base station, information on the shifted symbol location of the DMRS for the data channel,
• receive, from the base station, the DMRS for the data channel on the shifted symbol location, and
• perform a channel estimation using the received DMRS for the data channel.