METHOD AND APPARATUS FOR TRANSMITTING A SIGNAL IN A COMMUNICATION SYSTEM EMPLOYING SATELLITES THAT REDUCES THE EFFECTS OF DOPPLER ON A RECEIVER

摘要

A method and apparatus for precorrecting timing and frequency in a communication system that employs satellites to reduce timing uncertainty and frequency uncertainty due to satellite motion. A transmitted signal is precorrected, or compensated, to account for effects based on known satellite motion as the transmitterd signal propagates from the transmitter to the satellite. Removing these effects reduces the amount of uncertainty in the transmitted signal when it arrives at the receiver thereby making the task of signal reception easier.