H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/205
H04L 7/10 (2006.01) H04L 7/04 (2006.01) H04L 27/16 (2006.01) H04L 27/227 (2006.01) H04L 7/027 (2006.01)
Patent
CA 1329423
ABSTRACT OF THE DISCLOSURE A method and circuit arrangement for synchronizing a re- ceiver 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 ftO, 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 (.THETA.gp, .THETA.gn) are determined by linear regression, with these frequency and phase values being used, by means of subsequent difference and sum forma- tion, to obtain the following estimated values: carrier frequency offset ?t.DELTA. = 1/2 (fgp + fgn), pattern frequency ?p = 1/2 (fgp - fgn), clock pulse phase ? = l/2 (.THETA.gp - .THETA.gn), and carrier phase Image
556016
Alberty Thomas
Hespelt Volker
Ant Nachrichtentechnik G.m.b.h.
Fetherstonhaugh & Co.
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