| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio apparatus which restricts level fluctuations of a reduced carrier. <P>SOLUTION: In a transmitting unit 110, a modulated wave signal generation unit 1a outputs a digital in-phase signal I and a digital orthogonal signal Q which have been RZ-SSB modulated, which are then converted to an analog in-phase signal I and an analog orthogonal signal Q by a D/A converter 6a. Also, a "reduced carrier initial value" of a ROM 21a and a correction value (reduced carrier initial value + reference voltage) are added thereto by an adder 25. The output of the adder 25 is converted to an analog signal by a D/A converter 27a, which then has a reference voltage output from a reference voltage generation unit 28 added thereto by an adder 29 and further has the output of the D/A converter 6a added thereto by an adder 7a and an adder 8a. The output of the adder 29 is converted to a digital signal by an A/D converter 26, which is then compared with a reference value "reference voltage + reduced carrier initial value" of a ROM 23 by a data comparison/correction value generation unit 24 and, if a change is found, output to the adder 25 as a correction value (reduced carrier initial value + reference voltage). <P>COPYRIGHT: (C)2012,JPO&INPIT |
