Method for performing uplink transmission in wireless communication system and apparatus therefor

A UE for transmitting a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the UE comprising:

• one or more transceivers;
• one or more processors;
• and
• one or more memories operably connected to the one or more processors, and storing instructions, when executed by the one or more processors, which configure the one or more processors to perform operations,
• wherein the operations include
• receiving configuration information related to transmission of the PUSCH,
• receiving downlink control information scheduling the PUSCH, the downlink control information including information representing a downlink reference signal (DL RS) related to a beam for transmission of the PUSCH;
• and
• transmitting the PUSCH by using the beam,
• wherein the transmission of the PUSCH is based on port virtualization applied to most recently transmitted sounding reference signal (SRS) in a specific resource,
• wherein the specific resource is an SRS resource in which the DL RS is configured as spatial related information, and
• wherein the port virtualization is applied based on a first matrix determined by a number of antenna ports of the UE×a number of ports of the specific resource, related to generation of the number of antenna ports from the number of ports of the specific resource.

A method for receiving, by a base station, a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, the method comprising:

• transmitting configuration information related to transmission of the PUSCH;
• transmitting downlink control information scheduling the PUSCH, the downlink control information including information representing a downlink reference signal (DL RS) related to a beam for transmission of the PUSCH;
• and
• receiving the PUSCH transmitted by using the beam,
• wherein the transmission of the PUSCH is based on port virtualization applied to most recently transmitted sounding reference signal (SRS) in a specific resource,
• wherein the specific resource is an SRS resource in which the DL RS is configured as spatial related information, and
• wherein the port virtualization is applied based on a first matrix determined by a number of antenna ports of the UE×a number of ports of the specific resource, related to generation of the number of antenna ports from the number of ports of the specific resource.