Methods and apparatus for detecting cellular digital packet...

Details Methods and apparatus for detecting cellular digital packet... Methods and apparatus for detecting cellular digital packet...

G - Physics

10

L

G10L 11/02 (2006.01) H04B 17/00 (2006.01) H04L 27/00 (2006.01) H04L 27/18 (2006.01) H04Q 7/36 (2006.01) H04B 1/713 (2006.01) H04Q 7/22 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2171719

Disclosed herein are methods and apparatus for detecting the presence of a CDPD carrier in a channel of a cellular system (although the invention is broadly applicable to detecting a specific kind of carrier associated with an "overlay" system, wherein an "overlay" system is one that shares the frequency allocation of another system on a non-cooperating basis). This specification describes a spectral estimation technique for detection of a CDPD carrier. In addition, this specification describes an MMSE (minimum mean-squared error) method that improves on the spectral estimation method.

Procédés et appareil permettant de détecter la présence d'une porteuse de données en paquets numériques cellulaires (CDPD) dans le canal d'un système cellulaire (bien que la présente invention soit largement applicable à la détection d'un type spécifique de porteuse associé à un système de recouvrement, un système de recouvrement étant un système qui partage l'attribution des fréquences d'un autre système sur une base de non-coopération). La présente invention concerne une technique d'estimation spectrale pour la détection d'une porteuse CDPD. En outre, la présente invention concerne un procédé MMSE (erreur quadratique moyenne minimum) qui est amélioré par rapport au procédé d'estimation spectrale.

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