Patent ID: 8325831

Claim:
A receiving apparatus for receiving a signal according to an orthogonal frequency division multiplexing (OFDM) scheme, the receiving apparatus comprising: an OFDM symbol acquisition module for acquiring at least two consecutive OFDM symbols; a symbol operation module for operating upon pilot symbols and/or data symbols belonging to frequency bands determined according to a plurality of candidates for integer frequency offsets among a plurality of pilot symbols and a plurality of data symbols included in the acquired OFDM symbols; and an integer frequency offset estimation module for selecting a final integer frequency offset among the plurality of candidates for integer frequency offsets according to magnitudes of operation values obtained by the symbol operation module; wherein the frequency bands determined according to the plurality of candidates for integer frequency offsets are obtained by frequency-shifting preset frequency bands at which all pilot symbols are transmitted according to the plurality of candidates for integer frequency offsets; wherein the symbol operation module includes: correlation modules equal to a number of the plurality of candidates for integer frequency offsets; and a template module for providing the correlation modules with template information about pilot symbols included in the OFDM symbols; wherein each of the correlation modules operates, using the template information, upon pilot symbols and/or data symbols belonging to frequency bands determined according to one candidate integer frequency offset; and wherein the template information is information about a ratio of different pilot symbol values.