Data transmission signal generation method in channel modem demodulation device for satellite communication system

摘要

The present invention demodulates input data to estimate an error and outputs I, Q data that compensates for the error, thereby demodulating a channel modem for a satellite communication system to generate a data transmission signal for notifying the transmission time of I, Q data. A method for generating a data transmission signal in an apparatus, comprising: a channel for a satellite communication system that demodulates an input frequency signal of a predetermined level into I and Q data, and estimates and compensates an error for the I and Q demodulated data. A demodulation device for a modem, comprising: an error detection step of detecting a timing error, an amplitude error, and a phase error generated through satellites in the I and Q demodulation data; and based on the error data detected by the error detection step. An error compensation step of compensating for errors in the input I and Q data, and calculating an average error rate of the error data compensated in the error compensation step with respect to the input I and Q data Is an error rate calculation step, an error rate comparison step for comparing the error rate calculated in the error rate calculation step and the error rate threshold data, and when the error rate calculated in the error rate comparison step is smaller than the error rate threshold data, Characterized in that it comprises a data transmission signal generating step of generating a transmission signal.