Patent ID: 6993083
Filing Date: 2006-01-31
Classification: H04L

Abstract:
1. An OFDM demodulation apparatus for demodulating an OFDM signal which includes a specific synchronous symbol and an OFDM data symbol structured by a valid symbol period and a guard interval, said apparatus comprising: an impulse response estimation part for estimating an impulse response from the OFDM signal based on the synchronous symbol; an integration part for integrating an output obtained by estimation in said impulse response estimation part; a determination part for detecting symbol timing indicating a period where an output obtained by integration in said integration part is maximum; a window timing generation part for generating, according to the symbol timing, window timing including information which is capable of providing the valid symbol period; and a Fourier transformation part for subjecting the OFDM signal to Fourier transform according to the window timing.