<p>[PROBLEMS] To solve the problem that a conventional receiver cannot detect window position accurately. [MEANS FOR SOLVING PROBLEMS] A power calculating circuit (26a) calculates power for each two-dimensional Fourier transform data on a two-dimensional space by pilot signal transmission characteristics. A noise silencing/window coefficient calculating circuit (26) calculates a window coefficient based on power supplied from the power calculating circuit (26a) and threshold noise power (NP). An aliasing separation circuit (26d) eliminates aliasing components based on the maximum power position of a two-dimensional filter window and an OFDM signal to calculate window coefficient determination information.</p>
