Signal generation device and signal generation method

A signal generation device that employs a transmission method that uses inverse Fourier transform, comprising:

• a modulation unit configured to modulate transmission data to obtain modulation data;
• a serial-parallel conversion unit configured to convert the modulation data input in series from the modulation unit to parallel data of a prescribed size smaller than the size of inverse Fourier transform;
• a phase rotation unit configured to rotate the phase of a signal point at a prescribed rate for all of the parallel data obtained from the serial-parallel conversion unit, to obtain phase rotation data;
• a subcarrier disposition control unit configured to select all or a portion of the phase rotation data and configured to dispose the selected phase rotation data and the parallel data obtained from the serial-parallel conversion unit to each subcarrier, to obtain disposed parallel data;
• and
• an inverse Fourier transform unit configured to carry out inverse Fourier transform on the disposed parallel data.

A signal generation method executed by a signal generation device that employs a transmission method that uses inverse Fourier transform, comprising the steps of:

• modulating transmission data to obtain modulation data;
• converting the modulation data input in series to parallel data of a prescribed size smaller than the size of inverse Fourier transform;
• selecting and duplicating all or a portion of the parallel data to obtain duplication data;
• rotating the phase of a signal point at a prescribed rate for the duplication data, to obtain phase rotation data;
• and
• carrying out inverse Fourier transform on the parallel data and the phase rotation data.

A signal generation method executed by a signal generation device that employs a transmission method that uses inverse Fourier transform, comprising the steps of:

• modulating transmission data to obtain modulation data;
• converting the modulation data input in series to parallel data of a prescribed size smaller than the size of inverse Fourier transform;
• rotating the phase of a signal point at a prescribed rate for all of the parallel data, to obtain phase rotation data;
• selecting all or a portion of the phase rotation data and disposing the selected phase rotation data and the parallel data to each subcarrier, to obtain disposed parallel data;
• and
• carrying out inverse Fourier transform on the disposed parallel data.