| 摘要 |
PURPOSE:To attain real time transmission and parallel transmission by applying time division multiplex to a digital signal synchronizingly and sending a light signal into space. CONSTITUTION:A sender side transceiver 31 is provided with a time division multiplex circuit 33, a synchronizing digital signal modulation circuit 34 applying modulation such as FSK and PSK and an electrooptic conversion drive circuit 35. Moreover, a repeater 36 consists of an optoelectric conversion circuit 37 receiving multiplexed optical signals through a space from plural transceivers and converting them into an electric signal, a controller 39 discriminating the transmission signal from which transceiver it is sent to which transceiver, a time division multiplexer circuit 38 sampling the signal again and combining frames and an electrooptic conversion drive circuit 35. Then the time division multiplex circuit 33 combines frames, samples plural synchronizing digital signals to apply time division multiplex to the plural synchronizing digital signals and also FSK modulation or the like thereby sending the light signal into space. Thus, parallel transmission is attained in real time. |
