A method for a serving cell for signaling a communicating with a user equipment (UE) is described. The method may include transmitting, by the serving cell, a radio resource control (RRC) message to the UE. The RRC message may include a plurality of sets of parameters and a plurality of indices corresponding to the plurality of sets of parameters. The method may also include transmitting, by the serving cell, downlink control information (DCI) to the UE indicating an allocated resource block (RB) in a physical downlink shared channel (PDSCH) for the UE and an index corresponding to one of the plurality of sets of parameters to decode the allocated RB.