Method and arrangement for synchronizing a receiver in digital t

Details Method and arrangement for synchronizing a receiver in digital t Method and arrangement for synchronizing a receiver in digital t

1988-01-07

1989-07-11

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

329105, 375113, 455 71, H04L 706

Patent

active

048478725

ABSTRACT:
A method and circuit arrangement for synchronizing a receiver in a digital transmission system with transmission of a special preamble selected in such a manner that, with correct demodulation, the received signal has a cosine shape with a pattern frequency fp from which the clock pulse frequency results, and wherein frequency and/or phase of the carrier and clock pulse signal, respectively, are estimated, and, after demodulation with an assumed carrier frequency ft0, the individual spectral lines (gp, gn) of the received signal (rd) are obtained by filtering, and from these signals, their frequency (fgp, fgn) and phase ( gp, gn) are determined by linear regression, with these frequency and phase values being used, by means of subsequent difference and sum formation, to obtain the following estimated values: ##EQU1##

REFERENCES:
patent: 3372335 (1968-03-01), Takada
patent: 3571717 (1971-03-01), Monrolin
patent: 3593256 (1971-07-01), Gannon
patent: 4295222 (1981-10-01), Uffelen

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