Receiver and method for initial synchronization of a...

Details Receiver and method for initial synchronization of a... Receiver and method for initial synchronization of a...

2006-08-22

2006-08-22

Bayard, Emmanuel (Department: 2638)

Pulse or digital communications

Synchronizers

C375S376000

Reexamination Certificate

active

07095815

ABSTRACT:
The invention relates to a receiver and a method for initial synchronization of a receiver with the carrier frequency of a desired channel. It can happen during synchronization that the locally generated frequency van indeed be generated correctly although a divider ratio of a variable frequency divider inside the receiver and the reference frequency of a reference oscillator inside the receiver are simultaneously incorrectly set. The incorrect setting is evident in a particularly large skew which is detected in the receiver. In order to avoid such faulty settings even when use is made of budget-priced reference oscillators with relatively large frequency deviations, the skew is evaluated in the receiver and, should a prescribed threshold value be exceeded, a second and a third control signal are generated in order to correct the divider ratio and the reference frequency.

REFERENCES:
patent: 5355393 (1994-10-01), Nyenhuis et al.
patent: 6104767 (2000-08-01), Atarius et al.
patent: 6133802 (2000-10-01), Ma
patent: 6728326 (2004-04-01), Fulghum
patent: 6738429 (2004-05-01), Bourdeau

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