| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication device, a communication method and a communication program, for reducing a processing amount in multiplication processing. <P>SOLUTION: Frequency domain signals including phase information are mapped 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. Also, the subcarriers on which the frequency domain signals are mapped are transformed into time domain signals by performing inverse fast fourier transform, and the number of samples is increased by up-sampling the transformed time domain signals. Then, 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 up-sampled samples and/or sign-reversal processing for reversing a sign of the real number component or the imaginary number component is executed. That is, by executing the interchange processing and the sign-reversal processing, the band of the subcarriers on which the frequency domain signals are mapped is shifted to the specified band. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
