Mapper for high data rate transmission through channels...

H - Electricity – 04 – L

Patent

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H04L 27/04 (2006.01) H04L 25/49 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2284768

A mapper for a PAM encoder is provided and includes apparatus for generating (70) desired code levels, and a constellation matrix memory (40) which stores indications of a plurality of different N-dimensional constellations. The plurality of different constellations are used individually or together to support a plurality of different modem data (bit) rates. In order to maximize performance in the presence of robbed bit signaling, multidimensional constellations having different numbers of points are used together in the coding of a single group of bits.

L'invention concerne un dispositif de cartographie destiné à un codeur MIA comprenant un appareil destiné à produire des niveaux de codes voulus, ainsi qu'une mémoire matricielle à constellations stockant des indications d'une pluralité de constellations N-dimensionnelles différentes. La pluralité des différentes constellations sont utilisées individuellement ou conjointement pour assurer une pluralité de différents débits de données (binaires) du modem. Afin de maximiser les performances en présence d'une signalisation par réassignation de bit, des constellations multi-dimensionnelles présentant différents nombres de points sont utilisées conjointement dans le codage d'un seul groupe de bits.

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