| 摘要 |
PURPOSE:To prevent a quantized noise from being mixed to an ordering voice signal at every relaying by executing radio relay while a digital signal corresponding to the ordering voice signal in a digital radio signal is not converted into an analog signal form. CONSTITUTION:A decoder 2 converts an applied digital signal into the ordering signal of the analog signal form and the ordering voice signal is transmitted from an output terminal 3. On the other hand, an input ordering voice signal is inputted to an input terminal 4, the ordering voice signal is coded by a coder 6, and after the signal is converted into a digital signal form, the result is supplied to a digital operating device via a line 26. The digital operating device 8 supplies a prescribed operation to the digital signal transmitted from a receiver 1 and an output signal of the coder 6, the synthesized digital signal is formed and the synthesized digital signal is fed a transmitter 7 via the line 25. The transmitter 7 modulates the synthesized digital signal inputted via the line 25 and the digital signal inputted via the line 21 and transmits the result from an antenna 12. |
