The present invention after the first process and the first process of removing a direct current power offset modem addition perform self-compensation in the way of a receiver for removing a direct current power offset in a broadband wireless access communication system, the modem adding the initial synchronization the second process to the initial if a successful synchronization acquisition, by performing the remove direct current power offset tracking effectively a direct current power offset after obtaining synchronization with the initial synchronization acquisition by a third process of removing a direct current power offset attempting to obtain to remove, and has the advantage that when attempting to acquire the initial synchronization in the weak electric field by efficiently removing a direct current power offset to obtain excellent initial synchronization acquisition performance. ; OFDM, DC OFFSET, CINR, RFIC.
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