Synchronization system using aging prediction

Details Synchronization system using aging prediction Synchronization system using aging prediction

1997-12-24

2000-08-15

To, Doris H.

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

4551822, 4551922, 455260, 455265, H04B 140

Patent

active

061049158

ABSTRACT:
An improved local synchronization module which uses Frequency-phase adaptive double locked loop (FPADLL) to control a stable controllable oscillator is disclosed. A single physical feedback loop is implemented which can operate in either a phase locked loop mode or a frequency locked loop mode. The sync module includes a controller which determines in which mode the feedback loop operates. The controller also uses slipping information from a network reference recovery interface to reduce slipping. Also effects of ageing of the stable controllable oscillator are predicted and compensated for.

REFERENCES:
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patent: 4893094 (1990-01-01), Herold et al.
patent: 5335364 (1994-08-01), Heinonen
patent: 5402446 (1995-03-01), Minami
patent: 5559842 (1996-09-01), Javitt
patent: 5933059 (1999-08-01), Asokan

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