A method for transmitting uplink data by a user equipment in a wireless communication system, the method including receiving, by the user equipment, downlink control information including information on a target code rate for the uplink data, determining, by the user equipment, a channel code among a plurality of channel codes based on the target code rate, encoding, by the user equipment, the uplink data based on the determined channel code and transmitting, by the user equipment, the encoded uplink data, wherein the plurality of channel codes support different ranges of code rates, respectively, and wherein the plurality of channel codes are low density parity check codes.