Apparatus for estimating and compensating carrier frequency offset and data receiving method in receiver of wireless communication system

An apparatus for compensating and presuming a carrier frequency offset in a receiver of a wireless communication system and a method for receiving data are provided to improve the reception performance and the quality of services by facilitating a cell search. An apparatus for compensating and presuming a carrier frequency offset in a receiver of a wireless communication system includes a first unit and a second unit. The first unit calculates a received signal and a signal delayed during constant time of the received signal with a correlation window section. The second unit(582) converts a correlation result into a phase value and presumes an initial carrier frequency offset value by compensating the converted value according to a preamble segment number. The correlation window section is determined on the basis of CP(Cycle Prefix) length and preamble sequence repeat length from a predetermined constant position according to an initial frame boundary of the received signal.