| 摘要 |
PURPOSE:To prevent a malreception by multiplexing a modulated wave, where a subcarrier is modulated digitally with a discrimination code generated by a discrimination code generator with a frequency division to a main signal consisting of sound signal or the like and transmitting them. CONSTITUTION:A discrimination code generator 10 generates a discrimination code assigned to its own station by an ROM or the like. This discrimination code modulates the frequency of the subcarrier by a digital modulator 11, and this modulated wave is multiplexed with the main signal by a multiplexing circuit 12, and they are arranged on the frequency base. Since the subcarrier waves modulated by the discrimination code and the main signal are multiplexed in frequency division, lines are easily discriminated from one another. |
