A method, performed by a user equipment (UE), in a wireless communication system is provided. The method includes receiving information on a number of physical resource blocks (PRBs), determining a valid number of PRBs based on the information in case that a transform precoding is configured, and transmitting a physical uplink shared channel (PUSCH) based on the valid number of PRBs, wherein in case that the number of PRBs based on the information does not satisfy a pre-defined rule associated with the transform precoding, the valid number of PRBs corresponds to the largest integer satisfying the pre-defined rule associated with the transform precoding which is not greater than the number of PRBs based on the information.