| 摘要 |
PURPOSE:To enhance the S/N by transmitting the information of the same contents on the carriers of different frequencies. CONSTITUTION:The carriers of different frequencies are extracted from the signals sent from oscillator 1 through carrier generators 21-2n and then modulated through modulators 31-3n and via the modulation wave sent from modulation wave generator 4 to be then transmitted individually through transmission antennas 51-5n. While at the reception side, the carriers are received at reception antennas 61-6n and then demodulated through demodulators 81-8n. And the output is compounded at regeneration circuit 9. Accordingly, if the number of the carriers is referred to as n, signal S features the voltage addition to be n-fold. While Noise N features the power addition to be n<1/2>-fold. As a result, the S/N can be enhanced. |
