| 摘要 |
A frequency error corrector in a mobile station of a satellite communication system simultaneously corrects a frequency deviation of a satellite relay station and a frequency error generated in a conversion chain of an earth station upward/downward frequency, as well as doppler frequency deviation caused by a satellite motion. The frequency error corrector includes: upward frequency converter(3); a frequency converter(4); outbound demodulator(5) for detecting a receiving frequency error of a terminal station; a data divider(7) for separating a receiving frequency error information of the outbound signal of a center station; a frequency correction information proider(6) for receiving a receiving frequency error information of the terminal station and a receiving frequency error information of the center station, and providing a frequency correction information; an inbound modulator(8) for receiving an inbound signal transmission frequency correction information, and modulating the data to an inbound signal; a traffic demodulator(10) for correcting a frequency according to a traffic signal receiving frequency correction information; a traffic modulator(9) for correcting a frequency according to a traffic signal transmitting frequency correction information; and a reference frequency oscillator(1) for synchronizing the above elements.
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