Method and apparatus for uplink signal transmission in communication system

A method of a base station, comprising:

• transmitting, to a user equipment (UE), a higher layer message including transmission-related information of a sounding reference signal (SRS);
• transmitting, to the UE, control information including an information element indicating transmission of the SRS in a simultaneous transmission across multi-panel (STxMP) spatial division multiplexing (SDM) scheme;
• receiving, from the UE, mapping configuration information indicating a mapping between ports outputting the SRS to be transmitted via a plurality of panels and antenna elements included in each of the plurality of panels;
• and
• estimating a channel through the SRS received from the UE based on the mapping configuration information.

A user equipment (UE) comprising at least one processor, wherein the at least one processor causes the UE to perform:

• receiving, from a base station, a higher layer message including transmission-related information of a sounding reference signal (SRS);
• receiving, from the base station, control information including an information element indicating transmission of the SRS in a simultaneous transmission across multi-panel (STxMP) spatial division multiplexing (SDM) scheme;
• based on the SRS being transmitted via a plurality of panels, configuring mapping configuration information indicating a mapping between ports outputting the SRS and antenna elements included in each of the plurality of panels based on the higher layer message and the control information;
• reporting the mapping configuration information to the base station;
• and
• transmitting the SRS to the base station based on the mapping configuration information.