Performing uplink reception by a base station (BS) in a wireless communication system. In some implementations, a method includes: transmitting configuration information for a first sounding reference signal (SRS) that specifies a relation between the first SRS and a second SRS that is a reference for spatial beamforming of the first SRS, and based on the configuration information, receiving the first SRS which is transmitted by applying, to the first SRS, a first spatial beamforming that is identical to a second spatial beamforming used for transmission of the second SRS. The method further includes transmitting downlink control information (DCI) for uplink scheduling, where the DCI includes a SRS resource indication (SRI) and where a SRI field in the DCI carries the SRI, and where a bit width of the SRI field is based on a number of SRS resources in an SRS resource set configured for a user equipment (UE).