MULTILEVEL SIGNAL TRANSMISSION SYSTEM

MULTILEVEL SIGNAL TRANSMISSION SYSTEM

Apparatus is disclosed for transmitting a multilevel signal together with at least one pilot signal of specified frequency as a timing signal for determining the sampling position of a transmitted signal and/or a signal for reproducing a demodulating carrier. Further, a reference level signal of a p...

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Hauptverfasser: TAZAKI K,JA, HINOSHITA S,JA, YAMAMOTO H,JA, HAGIWARA S,JA
Format: Patent
Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator TAZAKI K,JA
HINOSHITA S,JA
YAMAMOTO H,JA
HAGIWARA S,JA
description Apparatus is disclosed for transmitting a multilevel signal together with at least one pilot signal of specified frequency as a timing signal for determining the sampling position of a transmitted signal and/or a signal for reproducing a demodulating carrier. Further, a reference level signal of a predetermined level is inserted in the multilevel signal train and the pilot signals are inserted in the multilevel signal train after frequency components in the neighborhood of the specified frequencies of the pilot signals are removed from the multilevel signal train on the transmitted side of the transmission line. In processing the multilevel signals the deviation of a sampled transmitted level of the reference level signal from the predetermined level thereof is detected; next, the frequency components in the vicinity of the pilot signals of the specified frequencies removed on the transmitting side of the line are extracted from the deviation; and then the signal distortion of the multilevel signal is corrected with the extracted frequency components on the receiving side on the transmission line.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title MULTILEVEL SIGNAL TRANSMISSION SYSTEM
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