| 摘要 |
In order to compensate for frequency deviation without using a pilot signal and associated apparatus, a channel number identification code is added to a transmit signal at an earth station transmitter. Each channel unit (demodulator) of a receiving earth station is arranged to extract a channel identification code from a received signal and to compare this with a preset code assigned to that channel. In the event that the recieved channel idenfication code does not coincide with that of the instant channel, the channel determines the number of channels by which deviation which has occured and adjusts its receiving frequency accordingly. |
