Wireless alarm system

Details Wireless alarm system Wireless alarm system

1991-10-24

1997-01-28

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, 380 48, 375208, 375365, 375367, H04B 169

Patent

active

055984274

ABSTRACT:
A wireless alarm system using spread spectrum transmitters, fast frequency shift keying, spread spectrum receivers and computer with a display. The spread spectrum transmitter includes an oscillator coupled to a microprocessor with chip code generation means, preamble register, address register and data register. The spread spectrum receiver acquires synchronization of the spread spectrum signal using a microprocessor coupled to the quieting, signal strength or baseband output of the receiver, with a two step algorithm. The steps comprise achieving a coarse lock and a fine lock to the spread spectrum signal.

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R. C. Dixon, Spread Spectrum Systems; (Wiley Interscience, 1984); p. 231, FIG. 6. 8(a).

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