Patent ID: 6925113

Claim:
A rain attenuation compensation method using adaptive transmission technique in a satellite communication system including a transmission end using a plurality of transmission methods combining an adaptive coding method and an adaptive modulation method, a receiving end using a plurality of receiving methods combining an adaptive decoding method and an adaptive demodulation method, and a controller for estimating/predicting signal-to-noise (S/N) ratio and controlling both the transmission method and transmission power of the transmission end and the receiving method of the receiving end, characterized in that the controller performs a rain attenuation compensation comprising the steps of: estimating a signal-to-noise (S/N) ratio of present time point, and predicting a signal-to-noise (S/N) ratio of the next time point; determining a transmission method which is adequate to the predicted signal-to-noise (S/N) ratio of the next time point; and generating a control signal for requesting the change of the transmission method and transmission power of the transmission end and the receiving method of the receiving end according to the determined transmission method, and transmitting/receiving a data through the changed transmission method.