SYNCHRONIZED OFFSET EXTRACTION IN A DATA RECEIVER

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...

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Bibliographic Details
Main Authors MORERA, DANIEL ALEJANDRO, PETREYE, DAVID ROYCE
Format Patent
LanguageEnglish
French
Published 17.06.1997
Edition6
Subjects
ALARM SYSTEMS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary: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 syn-chronously controlled (1840) providing for sampling of the received signal by the threshold level extraction circuit in substantially the center of each symbol.
Bibliography:Application Number: CA19932139513