Signals including two signals having levels different from each other are transmitted to the satellite, and the phase difference between the return signals of the two signals is measured. Transmission power control is performed so that the phase difference becomes equal to the difference measured in...http://www.google.com.hk/patents/US5257029?utm_source=gb-gplus-share專利 US5257029 - Transmission power control method and apparatus in satellite communication
