SATELLITE SYSTEM

摘要

The frequency error correcting device in a district center of a satellite communication system is provides with: an upward frequency converter (5) converting the upward frequency; a downward frequency converter (7) converting the downward frequency; an out-bound modulator (6) generating a continuous time division multiplexing carrier wave to output it to the upward frequency converter (5); an outbound demodulator (10) connected to an output terminal of the downward frequency converter (7) to detect a frequency error of an outbound signal received in the district center; a data inserting unit (9) inputting district center reception frequency error information to insert it into an out-bound time division multiplexing frame; an inbound modulator (8) connected to an output terminal of the downward frequency converter (7), and inputting district center reception frequency error information to modulate an inbound signal; a frequency error information providing unit (11) collecting district center frequency error information detected in the outbound modulator (10) to provide it to the data inserting unit (10) and the inbound modulator (8); and a reference frequency oscillator (3) oscillating a reference frequency to synchronize the upward frequency converter (5), the downward frequency converter (7), the outbound modulator (6), the inbound modulator (8) and outbound modulator (10).