Method and compensating for time error of time/frequency generator using global positioning system
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United States of America Patent
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Aug 17, 1999
Grant Date -
N/A
app pub date -
Feb 6, 1998
filing date -
May 10, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method for compensating for a time error of a time/frequency generator using a GPS which generates a signal to be used as the time/frequency source of a base station and an exchange in a CDMA mobile communication system, or to be used for the synchronization between the existing telephone exchanges. A time error estimation operation is performed for 600 seconds starting at a multiple of 1200 seconds while a least square estimation operation is advanced for the frequency estimation. Then, the time error is controlled in accordance with the estimated result, and an input data control value is compensated so that no error can occur in the frequency estimation operation based on the least square estimation. Therefore, the time error is compensated during the frequency estimation operation based on the least square estimation.
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