Advanced embedded code hopping system

Details Advanced embedded code hopping system Advanced embedded code hopping system

1995-04-20

1999-02-16

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

380 9, 380 23, 380 28, 375202, 34082569, H04L 912, E05B 6536, G08L 1702

Patent

active

058725199

ABSTRACT:
A system for monitoring and controlling an area comprising a controller for controlling system operational functions; at least one remote-control transmitter for transmitting system commands to the controller in a code word having a fixed word and a hopping word therein; the fixed word comprising at least one fixed data bit and the hopping word comprising at least one changing data bit, wherein the hopping word changes its binary value from transmission to transmission of the system commands; and, means for scrambling bits of the fixed word and bits of the hopping word within the code word.

REFERENCES:
patent: 4596985 (1986-06-01), Bongard et al.
patent: 4847614 (1989-07-01), Keller
patent: 4856062 (1989-08-01), Weiss
patent: 5103221 (1992-04-01), Memmola
patent: 5146215 (1992-09-01), Drori
patent: 5191610 (1993-03-01), Hill et al.
patent: 5442341 (1995-08-01), Lambropoulos

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