Means for deriving baud timing from an available AC signal

Details Means for deriving baud timing from an available AC signal Means for deriving baud timing from an available AC signal

1979-02-26

1980-08-05

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375119, 340310A, H04L 2732, H03D 322

Patent

active

042165431

ABSTRACT:
Baud timing is derived from an AC signal having n half-cycles during each baud period, for use in demodulating a carrier signal bearing digital information via some predetermined variation in a characteristic of the carrier signal during each baud period, by converting the carrier signal characteristic variation to a DC signal, sampling the DC signal at the same point during each half-cycle of the AC signal, summing the samples corresponding to the same half-cycle of the AC signal within each sequence of AC signal half-cycles occurring over successive baud periods, there being n such sample totals, identifying the largest one of the n totals and sychronizing the baud timing signal to the AC half-cycle corresponding thereto.

REFERENCES:
patent: 3830980 (1974-08-01), Peron et al.
patent: 3922534 (1975-11-01), Gerstenmeier et al.
patent: 4088957 (1978-05-01), Perkins

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