Method and device for detecting a pseudo-random sequence of carr

Details Method and device for detecting a pseudo-random sequence of carr Method and device for detecting a pseudo-random sequence of carr

1979-12-10

1981-04-14

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

370 20, 375 39, 375 43, 375 50, 375 15, H04L 512, H04L 2302

Patent

active

042623600

ABSTRACT:
A method and device which, in a receiver forming part of a data transmission system using DSB-QC modulation and wherein the transmitter generates a first sequence of successive carrier phase changes of 180.degree. taking place at the signaling rate 1/T followed by a second sequence of pseudo-random carrier phase changes of 0.degree. and 180.degree., with the first of these being a 0.degree. phase change, permit detecting the beginning of said second sequence. The received signal is filtered to extract therefrom its components at frequencies f.sub.1 and f.sub.2 defined as

REFERENCES:
patent: 3378770 (1968-04-01), Daquet
patent: 3443229 (1969-05-01), Becker
patent: 4004237 (1977-01-01), Kratzer

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