Synchronized offset extraction in a data receiver

Details Synchronized offset extraction in a data receiver Synchronized offset extraction in a data receiver

1992-07-02

1994-05-10

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375 76, 34082544, H03K 900, H04L 2706, H04L

Patent

active

053115546

ABSTRACT:
A selective call receiver (106) receives a radio frequency signal having digital signals contained within symbols. The signal demodulated by the receiver (804) comprises a substantially constant DC offset voltage and an AC voltage (1810) indicative of the information contained within the symbols. A threshold level extraction circuit (808) which extracts the offset voltage is synchronously controlled (1840) providing for sampling of the received signal by the threshold level extraction circuit in substantially the center of each symbol.

REFERENCES:
patent: 4481675 (1984-11-01), Ichikawa et al.
patent: 4625320 (1986-11-01), Butcher
patent: 4631737 (1986-12-01), Davis et al.
patent: 4821292 (1989-04-01), Childress
patent: 5025251 (1991-06-01), Mittel et al.
patent: 5051993 (1991-09-01), DeLuca et al.
patent: 5058204 (1991-10-01), Tahernia et al.

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