DIGITAL QAM AND VSB MODULATOR AND DEMODULATOR

A digital data demodulator/decoder (30) for either a quadrature amplitude (QAM) or vestigial sideband (VSB) modulated signal includes a quadrature detector (32, 33) feeding through digital filters (38, 39) to a decoder (50) which switches between the in-phase and quadrature outputs of the digital fi...

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Bibliographic Details
Main Author MONTREUIL, LEO
Format Patent
LanguageEnglish
French
Published 18.04.1996
Edition6
Subjects
BASIC ELECTRONIC CIRCUITRY
DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MODULATION
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A digital data demodulator/decoder (30) for either a quadrature amplitude (QAM) or vestigial sideband (VSB) modulated signal includes a quadrature detector (32, 33) feeding through digital filters (38, 39) to a decoder (50) which switches between the in-phase and quadrature outputs of the digital filters (38, 39). Un décodeur/démodulateur de données numériques (30) pour un signal à modulation d'amplitude en quadrature (QAM) ou à modulation de bande latérale atténuée (VSB), comprend un détecteur du signal en quadrature (32, 33) qui fournit ledit signal à un décodeur (50) par l'intermédiaire de filtres numériques (38, 39), ce décodeur effectuant une commutation entre les sorties en phase et en quadrature des filtres numériques (38, 39).
Bibliography:Application Number: WO1995US12220