Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1990-03-08
1993-05-04
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
370105, H04L 708
Patent
active
RE0342416
ABSTRACT:
An embedded framing bit pattern in a serial bit stream is located by combining the last bit to arrive of the serial bit stream with a predetermined number of prior bits of the serial bit stream which are spaced apart by the pitch of the bits of the framing bit pattern, and this combination of the bits is tested to determine if the combination matches part of the framing bit pattern. If a match does not occur, then the bits which were combined together are changed to a bit pattern that will not result in a match when these bits (except for the eldest bit which is disregarded) is combined again with a new bit of the serial bit stream, no matter what the logic state of the new bit. In this manner all of the bits, as they arrive and are combined and tested, will eventually be changed except the bits which are part of the framing bit pattern.
REFERENCES:
patent: 3940563 (1976-02-01), Susset
patent: 3985967 (1976-10-01), Colton et al.
patent: 4002845 (1977-01-01), Kaul et al.
patent: 4347606 (1982-08-01), Hoogeveen
patent: 4397020 (1983-08-01), Howson
patent: 4622666 (1986-11-01), Graves et al.
patent: 4847877 (1989-07-01), Besseyre
Dallas Semiconductor Corp.
Safourek Benedict V.
LandOfFree
Method and apparatus for extracting a predetermined pattern from does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for extracting a predetermined pattern from, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for extracting a predetermined pattern from will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1966940