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

A user equipment (UE) configured to transmit and receive a signal in a wireless communication system, the UE comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving information about a demodulation reference signal (DM-RS) port related to reception of a physical downlink shared channel (PDSCH);
• and
• receiving the PDSCH and a DM-RS based on the information,
• wherein a DM-RS port from a same code division multiplexing (CDM) group is not associated with a transmission of PDSCH to another UE based on (i) a frequency domain orthogonal cover code (FD-OCC) being disable for the DM-RS port and (ii) the DM-RS port being a single DM-RS port.

A method of transmitting and receiving a signal by base station in a wireless communication system, the method comprising:

• transmitting information about a demodulation-reference signal (DM-RS) port related to a reception of a physical downlink shared channel (PDSCH) by a user equipment (UE);
• and
• transmitting the PDSCH and the DM-RS based on the information,
• wherein a DM-RS port from a same code division multiplexing (CDM) group is not associated with a transmission of PDSCH to another UE based on (i) a frequency domain orthogonal cover code (FD-OCC) being disable for the DM-RS port and (ii) the DM-RS port being a single DM-RS port.

A base station configured to transmit and receive a signal in a wireless communication system, the base station comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:
• transmitting information about a demodulation-reference signal (DM-RS) port related to a reception of a physical downlink shared channel (PDSCH) by a user equipment (UE);
• and
• transmitting the PDSCH and the DM-RS based on the information, wherein a DM-RS port from a same code division multiplexing (CDM) group is not associated with a transmission of PDSCH to another UE based on (i) a frequency domain orthogonal cover code (FD-OCC) being disable for the DM-RS port and (ii) the DM-RS port being a single DM-RS port.