Frequency synchronizing method for a reference oscillator

Details Frequency synchronizing method for a reference oscillator Frequency synchronizing method for a reference oscillator

1994-02-14

1996-04-16

Chin, Stephen

Pulse or digital communications

Receivers

Automatic frequency control

375343, 4551642, 4551922, H04L 2706

Patent

active

055090346

ABSTRACT:
A method and apparatus of frequency synchronization is described for a reference oscillator. Using a reference oscillator set to a first frequency, the process begins by scanning for a radio frequency carrier modulated with a predetermined pattern. The radio frequency carrier is located such that a received pattern comprising a frequency shifted version of the predetermined pattern is identified and time synchronization is established. The received pattern, the predetermined pattern, and stepped alterations to the first frequency are combined to provide a set of results that represent pattern correlation versus reference oscillator frequency. The first frequency is offset using the set of results, such that frequency synchronization is improved.

REFERENCES:
patent: 4457003 (1984-06-01), Reed
patent: 4485477 (1984-11-01), Nossen
patent: 5276706 (1994-01-01), Critchlow

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