Apparatus and method for sub-carrier allocation in ofdm system

The invention here as in at least one orthogonal frequency division multiplexing system for transmitting data by using the transmission antenna, at least allocates two sub-carriers to the user terminal at the base station having a specific frequency band for the data transmission used in the system information for dividing sub-carriers into at least two sub-carriers of the sub-carrier group consisting of, and send the data to the user terminal using the subcarriers included in the divided sub-carrier group, and the channel status of the sub-carrier group transmitted from the user equipment using the determined sub-carrier group to assign to the user terminal and generates the base station, channel status information for the data transmitted by the subcarrier assigning the determined subcarrier groups to the user terminal, and the measured channel status Using information generating channel status information for the sub-carrier group, and is configured to the user terminal for transmitting the channel status information of the generated subcarrier groups.