Framing circuit for digital system

Details Framing circuit for digital system Framing circuit for digital system

1983-06-06

1985-09-10

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

370105, H04L 708

Patent

active

045411042

ABSTRACT:
A framing system processes a digital signal having a clock period of T seconds and a frame of which is made up of an n-bit framing pattern and m-bit information, (n+m) bits long in total. This system is applicable to a situation in which the probability that a pattern common to the n-bit framing pattern appears in the m-bit information is very low. With attention paid to the special characteristics of a frame pattern, when a coincidence pulse is found at a position different from the present frame position inside a window, the frame information is immediately regarded as being lost at that instant and the system is caused into a hunting state to search a new frame position.

REFERENCES:
patent: 3662114 (1972-05-01), Clark
patent: 4016368 (1977-04-01), Apple, Jr.
patent: 4214124 (1980-07-01), Jarus
patent: 4301534 (1981-11-01), Genter

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