Patent ID: 7519121

Claim:
An OFDM demodulation circuit for receiving and demodulating an OFDM signal comprising a plurality of orthogonal carrier waves, said circuit comprising: correlation means for determining a correlation value between an OFDM received signal prior to demodulation and a signal obtained by delaying the OFDM received signal prior to demodulation; peak detection means for detecting, on the basis of a correlation value obtained by said correlation means, a peak position of a correlation value for initiating a demodulation process and a peak position of a correlation value for continuing the demodulation process; and demodulation process terminating means for terminating the demodulation of the OFDM received signal in accordance with the result of analysis in said peak detection means, wherein said peak detection means is adapted such that T1<T2, where T1 is an analysis period for the peak position of the correlation value for initiating the demodulation process, and T2 is an analysis period for the peak position of the correlation value for continuing the demodulation process.