Patent ID: 7075949

Claim:
An OFDM receiving device for receiving an orthogonally frequency divided and multiplexed signals comprising a receiver for selecting an information channel to be received and receiving an RF signal of a selected information channel; an orthogonal demodulator for orthogonally demodulating the signal received by said receiver and outputting an OFDM signal of a base band; a Fourier transform section for performing an operation of Fourier transform on said OFDM signal of the base band and outputting an OFDM signal of a frequency domain; a decoder for decoding said OFDM signal of the frequency domain; and a frame synchronism control section for detecting the synchronism of transmission frames of channel data and controlling the synchronism of said decoder; said frame synchronism control section being adapted to maintain the synchronism of the transmission frames for switching the information channel to be used for signal reception among the channels connected for transmission in the case of receiving OFDM signals of frequency domains of a plurality of information channels multiplexed in a direction of frequency and collectively subjected to an operation of inverse Fourier transform for connected transmission.