| 摘要 |
PURPOSE:To eliminate the need for an inexpensive pilot signal transmission/reception equipment of a microwave band by sending identification information of a transmission talking channel from a transmission station by a carrier or a subcarrier and allowing a reception station to confirm the coincidence of the identification information to track the carrier frequency of the talking channel automatically. CONSTITUTION:In the mutual communication of plural each stations via a standstill satellite, a transmission station A sends information through a talking channel comprising one carrier, and a reception station B stacks the frequency of a transmission carrier automatically to receiving required transmission information. The transmission station A is provided with an input terminal 1 to which a transmission signal is inputted, an input terminal 2 to which a channel number of a transmission talking channel is inputted, a signal multiplexer 11 as a multiplex information generating means, an identification signal generator 12 as an identification information generating means, a modulator 13 as a transmission means and a channel setting device 14 as basic devices. On the other hand, the reception station B is provided with a demodulator 15 as a reception means, a talking channel setting device 16 as a talking channel setting means, an AFC 17 as an automatic frequency control means and an identification number discrimination device 18 as an identification information extracting means. |
