| 摘要 |
A method and apparatus for precorrecting timing and frequency in a communication system (100) that employs satellites (116, 118) to reduce timing uncertainty and frequency uncertainty due to satellite motion. A transmitted signal (410) is precorrected, or compensated (342), to account for effects based on known satellite mo tion as the transmitted signal propagates from the transmitter (120) to the satellite (116). Removing these effects reduces the amount of uncertainty in the transmitted signal when it arrives at the receiver (124), thereby making the task of signal reception easier.
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