| 摘要 |
PURPOSE:To improve the deterioration in the communication state caused by the variation in the frequency deviation of each earth station by selecting an earth station irradiating an optimum pilot signal automatically. CONSTITUTION:The 1st earth station 10, the 2nd earth station 20 and the 3rd earth station 30 send respectively transmission signals 14, 24, 34 respectively to a satellite 40 and receive reception signals 16, 26, 36 from the satellite for the communication. Further, a signal (pilot signal) being a reference of the communication is sent in the transmission signal from any station and each station decides the frequency and reception level of the signal received by the own station in matching with the frequency and output of the pilot signal. When a station irradiating the more optimum pilot signal than that of the own station is found out in the earth stations irradiating the pilot signal, the transfer request of the pilot signal is supplied to the said earth station. |
