| 摘要 |
The following process is eliminated to reduce the processing volume: calculating the amount of phase rotation from a reference signal point stored in the device, and carrying out further rotation so that a signal point is obtained that corresponds to the signal point obtained as a result of calculating the amount of phase rotation by using the signal point having an established timing as a reference signal point. The present invention is characterized in including a phase determining part (57) for determining the phase of an initial signal point so that a signal point having an established timing is brought to a prescribed phase from among signal points obtained when the first bit string is modulated using a differential encoding scheme; a signal point string generator (58) for modulating the first bit string by using the differential encoding scheme on the basis of the initial signal point, and modulating the second bit string by using a absolute phase scheme using the signal point having the established timing as a reference signal point; and a data output part (60) for transmitting the modulated first bit string, and then transmitting the modulated second bit string.
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