| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio communication apparatus in which arrival speech quality is made constant even if a modulation mode is different for each frame or for each time slot. <P>SOLUTION: A radio transmitter 50 is provided with a D-A 1 for converting a digital signal adjusted to the modulation mode into an analog signal, a mixer 5 for performing up-conversion with a local signal 4 to generate an intermediate frequency modulated wave, an RF-AGC 6 for controlling the gain of the intermediate frequency modulated wave output from the mixer 5, an RF-DET 8 for detecting the transmission power of the intermediate frequency modulated wave, an antenna 10, a CPU 11 for outputting a gain controlled voltage 13 to a gain controller 6 on the basis of the setting of the modulation mode and a detection signal from the detection circuit 8, and a DSP 12 for performing modulation processing by the modulation mode set by the CPU 11. <P>COPYRIGHT: (C)2010,JPO&INPIT |
