Patent ID: 8265182

Claim:
A radio transmitting apparatus that transmits a layered-modulated OFDM signal, the radio transmitting apparatus comprising: a first subcarrier modulation section that forms a first subcarrier modulation signal obtained by converting a plurality of modulation signals to a frequency domain; a second subcarrier modulation section that forms a second subcarrier modulation signal obtained by parallel conversion of a plurality of modulation signals; an inverse Fourier transform section that forms an OFDM signal by performing an inverse Fourier transform on the first and second subcarrier modulation signals; a subcarrier mapping section that is provided ahead of the inverse Fourier transform section and controls allocation of the first and second subcarrier modulation signals to a plurality of subcarriers forming the OFDM signal; and a section that performs variable control of proportions of the first subcarrier modulation signal and the second subcarrier modulation signal included in the OFDM signal.