COMPENSATION METHOD OF FREQUENCY ERROR IN TERMINAL STATION OF SATELLITE COMMUNICATION SYSTEM

摘要

PURPOSE: A frequency error correcting method of a terminal in a satellite communication system is provided to correct frequency error by measuring frequency deviation of a satellite through transception frequency of a data band. CONSTITUTION: A deviation calculating unit transmits data to a satellite through a first transmission frequency. The deviation calculating unit receives data relayed from the satellite(S10). The deviation calculating unit calculates estimated motion Doppler deviation(S20). The deviation calculating unit transmits data to the satellite through a deviation-compensated second transmission frequency. The deviation calculating unit receives data related from the satellite(S30). The deviation calculating unit calculates the motion Doppler deviation and the frequency deviation(S40). A terminal station performs frequency error compensation(S50). [Reference numerals] (AA) Start; (BB) End; (S10) Data relayed from a satellite is received after transmitting data to a first transmission frequency; (S20) Estimation motion Doppler deviation is calculated; (S30) Data relayed from a satellite is received after transmitting data to a second transmission frequency; (S40) The motion Doppler deviation and the frequency deviation are calculated; (S50) Frequency error is compensated