Spread spectrum handshake for digital subscriber line...

Details Spread spectrum handshake for digital subscriber line... Spread spectrum handshake for digital subscriber line...

H - Electricity

04

B

H04B 1/38 (2006.01) H04B 1/69 (2006.01) H04L 5/16 (2006.01) H04L 27/10 (2006.01) H04L 27/18 (2006.01) H04L 27/26 (2006.01)

Patent

CA 2332941

Handshake information for xDSL services is transmitted utilizing a spread spectrum modulated system where a plurality (n) of carrier tones (n > 2) are summed and utilized as a spread spectrum carrier (SSC), and data is modulated onto the carrier (at all utilized frequencies). Preferably, phase shift keying (PSK) modulation or a variation thereof is used as the encoding/modulation technique.

Selon cette invention, on transmet les informations relatives à la poignée de main pour différents services à ligne d'abonné numérique (xDSL) en utilisant un système à modulation de spectre étalé dans lequel on additionne une pluralité (n) de tons de la porteuse (n?2) pour les utiliser en tant que porteuse à spectre étalé (SSC), les données étant modulées par rapport à la porteuse (sur toutes les fréquences utilisées). De préférence, on utilise en guise de technique de codage / modulation la modulation à transmission par déplacement de phase (PSK) ou une variante de celle-ci.

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