H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 13/23 (2006.01) H03M 13/00 (2006.01) H03M 13/25 (2006.01) H03M 13/31 (2006.01) H03M 13/35 (2006.01) H04L 27/26 (2006.01) H04L 1/00 (2006.01)
Patent
CA 2482992
A method of transmitting digital information uses the steps of forward error correction coding (56) a plurality of bits of digital information (54) using complementary pattern-mapped convolutional codes, modulating (62) a plurality of carrier signals with the forward error correction coded bits, and transmitting (76) the modulated carrier signals. The modulation can include the step of independently amplitude shift keying the in-phase and quadrature components of the QAM constellation using Gray codes corresponding to amplitude levels. Receivers for such signals are also described.
L'invention concerne un procédé de transmission de données numériques, qui consiste à: coder par correction d'erreurs sans voie de retour (56) plusieurs bits de données numériques (54), au moyen de codes convolutifs complémentaires en treillis; moduler (62) plusieurs signaux porteurs avec les bits codés par correction d'erreurs sans voie de retour; et transmettre (76) les signaux porteurs modulés. Cette modulation peut consister à réaliser, indépendamment, une modulation par déplacement d'amplitude de la composante en phase et de la composante en quadrature de la constellation MAQ, en utilisant des codes de Gray correspondants à des niveaux d'amplitude. On décrit en outre des récepteurs de tels signaux.
Ibiquity Digital Corporation
Smart & Biggar
LandOfFree
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