1. A method for operating a first terminal in a wireless communication system, the method comprising:receiving, from a base station, control information of a resource block group for indicating a power ratio allocated to the resource block group;
identifying, based on the control information, a first power ratio allocated to a first terminal associated with a resource block in the resource block group and a second power ratio allocated to a second terminal associated with the resource block, wherein the identifying the first power ratio comprises:
identifying a power ratio allocated to at least one resource block allocated to the first terminal, and
identifying the first power ratio allocated to the first terminal among the power ratio allocated to the at least one resource block;
receiving, from the base station, signals on the resource block, the signals including a first downlink signal for the first terminal and a second downlink signal for the second terminal; and
detecting, based on the first power ratio and the second power ratio, the first downlink signal among the signals.