| 摘要 |
A method for detecting OFDM signal is provided to search a parameter of an OFDM signal by detecting the interval of a pilot. An OFDM detection apparatus(200) detects the received periodic signal. A circulation transition unit(210) cyclically transits the received signal to two signals in the frequency domain by using parameter. A bandpass filter(220) passes two signals transitted from the circulation through an observation bandwidth. The bandpass filter removes the signal factor of the other band correlated with the signal factor of the observation band. An autocorrelator(230) makes one signal among two signals circulated-transitted conjugation complex. Two signals are correlated. The FFT windowing part(240) performs windowing the received signal correlated as the same size as the input number of sample of the FFT part(250). The FFT part converts the received signal into the frequency area signal. |
