Method for the synchronization of a transmission path

Details Method for the synchronization of a transmission path Method for the synchronization of a transmission path

1971-10-28

1978-10-17

Birmiel, Howard A.

Telegraphy

Systems

Printing

178 691, 325 58, 325473, 325139, H04B 110, H04L 700

Patent

active

041211596

ABSTRACT:
A method for synchronizing apparatus on the receiving side of a time multiplex or code multiplex transmisson system with apparatus on the transmitting side of the system, in particular in a system which operates in accordance with the SSMA technique, with which system the information is transmitted in a broad frequency band compared with the base band occupied by the information wherein a rapid frequency change modulated oscillation is transmitted by the transmitter at the beginning of transmission so that each frequency element is submitted to a digital phase modulation during transmission which is characteristic therefor in such a way that the frequency band which is occupied by this signal corresponds at least approximately to the frequency band which is occupied in a normal case of operation, whereby the carrier to be transmitted is phase shift keyed by a very rapidly clocked code with a long code period. The coding of the combined frequency and phase shift keyed signal transmitted prior to communication may contain fewer elements per code period, so code-phase-synchronization can be acquired more rapidly.

REFERENCES:
patent: 3305636 (1967-02-01), Webb
patent: 3432619 (1969-03-01), Blasbalg
patent: 3447085 (1969-05-01), DeHaas et al.
patent: 3475558 (1969-10-01), Cahn
patent: 3509471 (1970-04-01), Puente
patent: 3566268 (1971-02-01), Webb
patent: 3588747 (1971-06-01), Rusho
patent: 3617892 (1971-11-01), Hawley et al.
patent: 3665472 (1972-05-01), Kartchner et al.
patent: 3706933 (1972-12-01), Bidell et al.
patent: 3713025 (1973-01-01), McNair

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