| 摘要 |
PURPOSE:To obtain enough control precision without increasing the power consumption of a satellite by alternating an estimation mode and a calibration mode at proper intervals and controlling transmitted electric power. CONSTITUTION:A holder 32 enters a holding state under the control of a logical device 35 in estimation mode and the signal of a detector 31 is disconnected, so only the signal of the detector 30 is passed through a comparator 33 and a transmitted electric power controller 34 to perform estimation control over a transmission gain on the basis of the information of a received signal. Then, the control mode is switched to the calibration mode at a proper interval of time. In this state, closed loop control based upon such a pilot signal that a satellite output EIEP is controlled constantly is performed, so an error due to gain variation, etc., of an earth station transmission system is compensated with enough control precision. Then, the estimation mode and calibration mode are repeated at proper intervals of time. |
