ROLLING CODE SECURITY SYSTEM

A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted RF transmission and recovers the fixed code and rolling code. Upon comparison of the fixed...

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Bibliographic Details
Main Authors FARRIS, BRADFORD L, FITZGIBBON, JAMES J
Format Patent
LanguageEnglish
French
Published 29.07.2008
Subjects
BASIC ELECTRONIC CIRCUITRY
CHECKS FOR WINGS
CODE CONVERSION IN GENERAL
CODING
DECODING
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
FIXED CONSTRUCTIONS
KEYS
LOCKS
PHYSICS
SAFES
SIGNALLING
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS
WINDOW OR DOOR FITTINGS
WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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Summary:A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted RF transmission and recovers the fixed code and rolling code. Upon comparison of the fixed and rolling codes with stored codes and determining that the signal has emanated from an authorized transmitter, a signal is generated to actuate an electric motor to open or close a movable barrier.
Bibliography:Application Number: CA19962443452