| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal generator that generates a digital modulation signal of a multi-channel without using a multiplier for each channel. SOLUTION: The signal generator where a carrier is orthogonally modulated by pluralities of I base band channels and pluralities of Q base band channels to produce a digital modulation signal of multi-channel is provided with a 1st memory 21 that stores in advance data with a weight corresponding to the combination of symbols of digital signals of each channel of the I base band and with a 2nd memory 22 that stores in advance data with a weight corresponding to the combination of symbols of digital signals of each channel of the Q base band. Addresses corresponding to the combination of symbols of the digital signals of the base band are given to the 1st and 2nd memories and data are outputted to them. |
