Apparatus for synchronization on the basis of a received digital

Details Apparatus for synchronization on the basis of a received digital Apparatus for synchronization on the basis of a received digital

1979-06-18

1981-04-21

Robinson, Thomas A.

Pulse or digital communications

Spread spectrum

Direct sequence

H04L 700

Patent

active

042636728

ABSTRACT:
An apparatus for synchronization in digital transmission makes it possible to control a clock circuit on the basis of the timing of a digital message having indexing bits followed by information bits. For this purpose it contains a control system, including a clock circuit, with an input connected either to the input or the output of a delay line by means of a switching system. The phase control begins with the first indexing bit received at the input of the delay line. When this control is established the input of the control system is connected to the output of the delay line. This connection brings the clock into operation on the basis of the control established and then sets off a "follow-up" operation as soon as the first indexing bit reaches the output of the delay line.

REFERENCES:
patent: 3629503 (1971-12-01), Rempert
patent: 3908084 (1975-09-01), Wiley

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