Patent ID: 6856590

Claim:
An OFDM transmission device comprising: N encoders for generating an OFDM signal of a frequency domain containing a predetermined number of symbols and having a data structure formed on a symbol basis for transmission; N frequency converters for converting carrier frequencies of the OFDM signals of the frequency domains output from the respective encoders; a multiplexer for generating multiplexed data by multiplexing the N OFDM signals of the frequency domains frequency-converted respectively by said N frequency converters in a direction of frequency; an inverse Fourier transform section for generating the OFDM signal of a base band by performing an operation of inverse Fourier transform on said multiplexed data on a symbol by symbol basis; an orthogonal modulator for orthogonally modulating said OFDM signal of the base band; and a transmitter for converting the frequency of the orthogonally modulated OFDM signal into a signal of an RF band and transmitting said signal of the RF band; each of said N encoders being adapted to synchronize the OFDM signals of frequency domains of the other encoders with a transmission frame to generate the OFDM signal of the frequency domain.