Signal detector and bit synchronizer

Details Signal detector and bit synchronizer Signal detector and bit synchronizer

1990-01-02

1991-12-31

Olms, Douglas W.

Pulse or digital communications

Repeaters

Testing

375121, H03D 300, H04C 2706

Patent

active

050777580

ABSTRACT:
An apparatus and method for processing a signal is capable of determining the presence or absence of a signal having a predetermined baud rate. By initializing counting registers to either first or second values, and receiving the signal, either the presence or absence of the baud rate may be more rapidly detected. Rapid detection provides for improved battery savings when the invention is used within a portable receiver such as a pager. The invention provides for positive detection of the predetermined baud rate while rejecting a baud rate being an integer divisor of the predetermined baud rate. Additionally, as a result of the determination of the presence of the predetermined baud rate, a sample clock may be established for receiving data at the baud rate.

REFERENCES:
patent: 4414676 (1983-11-01), Kraul et al.
patent: 4506262 (1985-03-01), Vance et al.
patent: 4518961 (1985-05-01), Davis et al.
patent: 4554665 (1985-11-01), Beesley
patent: 4628269 (1986-12-01), Hunninghaus et al.

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