Patent ID: 8374264

Claim:
A signal processing apparatus, comprising: computation means for performing transform computation adapted to Fourier-transform a time domain Orthogonal Frequency Division Multiplexing (OFDM) signal into a frequency domain OFDM signal; processing means for performing carrier frequency offset detection adapted to detect an estimated carrier frequency offset that is an error of a carrier used for demodulation of the OFDM signal; and carrier frequency offset correction means for performing carrier frequency offset correction to correct the carrier frequency offset of the frequency domain OFDM signal in accordance with the estimated carrier frequency offset, wherein the OFDM signal contains a first preamble signal and a second preamble signal following the first preamble signal, and the computation means performs the transform computation of the second preamble signal in parallel with the carrier frequency offset detection performed by the processing means using the first preamble signal.