Patent ID: 6907026

Claim:
A signal transmission system of an orthogonal frequency division multiplexing using a plurality of carriers to transmit OFDM signal comprising a transmitting apparatus and a receiving apparatus, said receiving apparatus comprising; an input unit for applying said OFDM signal from said transmitting apparatus: a fast Fourier transforming unit coupled with said input unit, for separating said OFDM signal into base-band signals including pilot signals of respective carriers; an interpolation unit coupled with said fast Fourier transforming unit, for interpolating said pilot signals in a time-axis direction and a frequency-axis direction to calculate reference signal vectors of said carriers in which said pilot signals are not inserted; a demodulation unit coupled with said interpolation unit, for decoding to be produced as information codes: a delay unit coupled with said a Fourier transforming unit and said demodulation unit, for adjusting a delay time of said base-band signals passing therethrough; and a control unit coupled with said interpolation unit, for changing frequency band characteristics of said interpolation unit.