| 摘要 |
PURPOSE:To correct the rainfall attenuation of an up link without wasting the transmitting electric power of a satellite and increasing the scale of a ground station by allowing a subordinate station to receive a pilot signal from a master station and controlling the transmitting electric power of the subordinate station individually according to the received level. CONSTITUTION:When a maximum received level on a fine weather condition is PA, it is the set level of this circuit. At the master station, a common-circuit (CSC circuit) carrier received level from each subordinate station is sampled and a level comparison is made to transmit the pilot signal by increasing the transmitting electric power up to the received level of a station having the highest received level. Since the effective isotropic radiation electric power (EIRP) of the satellite is constant without reference to rainfall attenuation near the master station, i.e. transmitting station, each subordinate station controls its transmitting electric power so that the received level of its own radio wave is equal to that of a pilot signal received by itself, thus making the EIRP constant without reference to the rainfall attenuation. |
