| 摘要 |
PURPOSE:To reduce leakage power to an adjacent channel by receiving an output signal for a transmission slot period of its own station through the adja cent channel and controlling a transmission output in response to a signal level so as to prevent nonlinear distortion of the transmission output. CONSTITUTION:The radio telephone set is made up of a transmission section comprising a modulation circuit 1, a frequency conversion circuit 2, a transmission power amplifier circuit 3 and a DC voltage control circuit 4 and up of a double superheterodyne system reception section. Then the reception channel of the reception section for the reception slot period is set to the same frequency channel as that of a transmission frequency of the transmission section of its own station by a channel selection circuit 8 but changed to the adjacent channel of the transmission channel for the transmission slot period. Then a control input is fed to a DC voltage control circuit 4 of the transmission section in response to a signal level detected by a reception signal level detection circuit 13 of the reception section to control the transmission output of the transmission section. Thus, the transmission output is controlled so as not to cause nonlinear distortion thereby compensating linear performance.
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