Synchronizing signal recovery circuit for radiotelephones

Details Synchronizing signal recovery circuit for radiotelephones Synchronizing signal recovery circuit for radiotelephones

1983-07-29

1986-05-27

Orsino, Jr., Joseph A.

Pulse or digital communications

Spread spectrum

Direct sequence

375120, H04L 700

Patent

active

045920761

ABSTRACT:
An improved circuit for synchronizing signal recovery particularly suitable for mobile radiotelephone operation is disclosed. The initializing circuit of the phase-locked loop in the data receiver is inhibited for a predetermined duration upon triggering of a "window mode" by either of a rising or falling pulse-edge in a sequence of "ones" or "zeros" in the received data. The window mode masks the invalid transitions in such sequences and prevents retriggering by such transitions.

REFERENCES:
patent: 3613015 (1971-10-01), Lewis et al.
patent: 4464771 (1984-08-01), Sorensen

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