Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1986-03-17
1989-02-28
Griffin, Robert L.
Pulse or digital communications
Spread spectrum
Direct sequence
360 43, H04L 702
Patent
active
048093041
ABSTRACT:
The invention relates to a method for extracting a synchronous clock signal from a single- or double-density coded signal via a modulation frequency corresponding to the time interval T separating the most closely-spaced pulses of the received signal. This clock signal comprises a window that makes it possible to extract a binary data signal from the coded signal that is received; the values of the binary data signal have determinate durations T or 2T. The invention also relates to an apparatus for performing the method.
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patent: 4245264 (1981-01-01), Allen
patent: 4281356 (1981-07-01), Sousa
patent: 4307381 (1981-12-01), Isailovic
patent: 4462051 (1984-07-01), Chan
patent: 4521816 (1985-06-01), Kougami et al.
Bull S. A.
Chin Stephen
Griffin Robert L.
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