| 摘要 |
FIELD: information technology. ^ SUBSTANCE: reception device has apparatus for determining the first, second and third position of the initial position of the fast Fourier transform (FFT) interval, apparatus for selecting one of the determined initial positions of the FFT interval, FFT apparatus for performing fast Fourier transformation of an orthogonal frequency division multiplexing (OFDM) signal in the time domain by using the initial position selected by the selection apparatus in order to generate a first OFDM signal in the frequency domain. The apparatus for determining the first position calculates the value of correlation between the OFDM signal in the time domain and the signal obtained by delaying said time-domain OFDM signal by the length of the effective symbol. Apparatus for determining the second position estimates the channel characteristic for transmitting the OFDM signal and the delay profile before estimating the value of interference between symbols with respect to each of the FFT intervals. The apparatus for determining the third position establishes the FFT interval with offset from the FFT interval used for generating the first OFDM signal, for generating the second OFDM signal before eliminating distortions from the first and second OFDM signals in order to generate an adjusted signal. ^ EFFECT: reducing multiple-beam interference by adjusting the symbol synchronisation signal. ^ 8 cl, 26 dwg |
