| 摘要 |
PROBLEM TO BE SOLVED: To compensate deterioration in modulation characteristics caused by the difference in the operation time of in-phase and orthogonal signals in a digital orthogonal modulator. SOLUTION: A transmission signal generating device has: a signal point setting means 12 for setting a compensation signal point for correcting a position error in signal point arrangement caused by an operation timing error in a digital orthogonal modulator according to the position error in signal point arrangement; and a data mapping means 11 for allocating a digital information signal to be transmitted based on the signal point setting means. Based on the signal point information allocated by the data mapping means, digital modulation 13 and digital orthogonal modulation 15 are performed in the transmission signal generating device. COPYRIGHT: (C)2009,JPO&INPIT
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