Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1985-06-12
1987-06-23
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
375118, 375120, 307262, 328155, H04L 702
Patent
active
046758852
ABSTRACT:
The digital circuit extracts synchronism signals from a serial flow of coded data according to a process which uses a phaselocked loop where the different level transitions of the signal received are separately considered and a phase is determined for each type, the latter being compared with a specific reference phase, established in the initialization step. The error signal obtained from the comparison is used for correcting synchronism signal frequency.
REFERENCES:
patent: 4166979 (1979-09-01), Waggener
patent: 4435687 (1984-03-01), Nadan et al.
Bruno Carlo M.
Gagliardi Fabrizio
Tofanelli Adler
Dubno Herbert
Huseman M.
Ross Karl F.
Safourek Benedict V.
Sip Societa' Italiana Per L'Esercizio Telefonico P.A.
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