| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase in bit error rate and deterioration of transmission efficiency due to DC offset and carrier leakage. SOLUTION: Transmission data is converted into a parallel signal by means of a S/P converter 101, and is subjected to IFFT by means of an IFFT device 102, and then is converted into a serial signal by means of a P/S converter 103. The OFDM signal is frequency-modulated by a frequency modulator 104 so that, out of the subcarriers which constitute the OFDM signal, those assigned with transmission signals may be disposed in other region than a DC component generation region.
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