| 摘要 |
PURPOSE:To attain a suitable time division multiplex connecting TDMA system, by controlling transmission power from a reference station with a reception level of a beacon signal of a satellite and a folded burst signal of the reference station and from nonreference stations with the reception signal of the reference station burst signal and of the data burst of the station itself. CONSTITUTION:In the reference station, a beacon receiver 23 converts and amplifies a beacon at 1F and transmits an output 101. A comparator 25 compares the said output 101 with an output 102 of a detector 24 and controls the transmission power with a variable attenuator 26 depending on the difference between the ratio of both and a prescribed value. A TDMA transmitter/receiver 29 switches an extracted gate of the detector 24 with a gate pulse 104 transmitted from the synchronizing control circuit. In the nonreference stations, a detector 33 extracts the data burst of the station itself and detects the folded reception level. A comparator 35 controls the transmission power of the data burst with a variable attenuator 36 through the output of the detectors 33 and 34. The extracted gate of the detectors 33, 34 of the station itself is switched with a gate pulse from a synchronization controlling circuit of a TDMA transmitter/receiver 39. |
