Communications: electrical – Continuously variable indicating – With calculation
Patent
1996-10-08
1998-05-26
Hofsass, Jeffery
Communications: electrical
Continuously variable indicating
With calculation
371 372, 371 572, 375220, 375240, 34087001, G08B 500
Patent
active
057572828
ABSTRACT:
Low rate telemetry transmission between a transmission side and a receiving side is accomplished at the transmission side on digital information in a channel at a predetermined bit rate by selecting a predetermined frame thereof and outputting a selected one of at least two digital information elements desired for transmission with and in addition to those in the frame by means of a key generator which outputs a known key to the transmission and receiving sides and defined by a sequence of digital information that uniquely identifies the selected digital information elements by first processing the digital information element with the key in a first reversible mathematical manipulation to provide a first output and secondly performing a second reversible mathematical manipulation of the first output and the digital information in the frame to obtain an encoded digital information sequence which is then transmitted from the transmission side and received by the receiving side where it is decoded by reversing the mathematical manipulations for obtaining the frame of digital information in the channel and the key and form identifying the selected element from the key.
REFERENCES:
patent: 4539691 (1985-09-01), Ogawa
patent: 4779276 (1988-10-01), Kashida
patent: 5136618 (1992-08-01), Wright
patent: 5258999 (1993-11-01), Wernimont
patent: 5354319 (1994-10-01), Wyborny
patent: 5509031 (1996-04-01), Johnson
patent: 5534929 (1996-07-01), Tanaka
ALCATEL N.V.
Hofsass Jeffery
Wong Albert K.
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