| 摘要 |
A communication device including: mapping frequency domain signals including phase information onto, of a band of subcarriers for transmitting the frequency domain signals, a band in which a twiddle factor for shifting the band of the subcarriers to a specified band is an integer power of an imaginary unit; performing inverse fast fourier transform on the subcarriers on which the frequency domain signals are mapped, to transform the subcarriers into time domain signals; increasing the number of samples by up-sampling the time domain signals; and executing, when the twiddle factor is an integer power of the imaginary unit, interchange processing for interchanging a real number component and an imaginary number component of each of the samples up-sampled or sign-reversal processing for reversing a sign of the real number component or the imaginary number component to shift the band of the frequency-domain-mapped subcarriers to the specified band.
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