System, device and method for improving a defined property...

Details System, device and method for improving a defined property... System, device and method for improving a defined property...

H - Electricity

04

L

H04L 27/04 (2006.01) H04L 27/26 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2328145

In a transmitter (10) for transmitting data in blocks over a channel to a receiver (19), a device for improving a defined property of transform-domain symbols, the device, including: a signal mapper (12) which maps the input data into blocks of symbols in a first domain; wherein each of the symbols is chosen from a base constellation contained in an expanded constellation having expansion symbols, and wherein at least some of the symbols in the base constellation have one or more corresponding expansion symbols; and a perturbation transform device (14 and 16), responsive to the blocks of symbols, which produces for each block of symbols in the first domain a block of perturbed transform-domain symbols in order to improve a defined property of the transform-domain symbols.

Selon cette invention, dans un émetteur (10) de transmission de données en blocs sur un canal vers un récepteur (19), un dispositif permettant d'améliorer une propriété définie des symboles du domaine des transformées comprend: un analyseur (mappeur) (12) de signaux qui fait correspondre les données d'entrée à des blocs de symboles dans un premier domaine, chacun des symboles étant choisi dans une constellation de base contenue dans une constellation expansée possédant des symboles d'expansion, et au moins certains de ces symboles possédant un ou plusieurs symboles d'expansion correspondants; un dispositif à perturbations/transformées (14 et 16), sensible aux blocs de symboles, qui produit pour chaque bloc de symboles du premier domaine un bloc de symboles du domaine des transformées qui permet d'améliorer une propriété définie des symboles du domaine des transformées.

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