Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1995-09-08
1997-12-09
Chin, Wellington
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
375358, 331 44, H04L 700, H04B 719
Patent
active
056970820
ABSTRACT:
A system for self-calibrating a clock of a communication terminal for use with communication systems in which a central communication node generates time base correction signals for the terminal clock includes a terminal oscillator which generates an oscillator frequency that includes an error amount. An oscillator calibration filter generates a frequency error estimate amount. Circuitry is provided for subtracting the frequency error estimate amount generated by the calibration filter from the oscillator frequency error amount. Circuitry is provided for applying the time base correction signals to the calibration filter to thereby modify the frequency error estimate amount generated by the calibration filter based upon the time base correction signals generated by the communication central node.
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El-Ghoroury Hussein S.
Greer Steven Craig
Chin Wellington
Corrielus Jean B.
Eppele Kyle
Murrah M. Lee
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