| 摘要 |
PURPOSE:To efficiently transmit a signal with a different C/N request by converting the transmission rate of plural data signals into a data rate in which required carrier power versus noise power ratio (C/N) is obtained respectively and applying time division multiplex to the data signals. CONSTITUTION:The TDM equipment 11 of a space equipment A applies time division multiplex to an observation data and a telemetry data whose transmission rate differs from each other, applies a prescribed modulation to the result, a power amplifier 13 amplifies the power of the data and it is sent from an antenna 14 toward a ground station B. The power amplifier 22 of the ground station B amplifies the power of the received data and it is fed to a broad band filter 23 and a narrow band filter 24, through which an observation data with a high transmission rate and a supervisory and controlling data with a low transmission rate are made respectively pass, they are demodulated and the transfer data rate is converted as necessary. Thus, the transfer rate is converted to obtain the C/N corresponding to different requirements and the result is inserted on a time base, thereby transmitting the signal with different C/N requirements efficiently. |
