Method for treating a signal in the presence of interference

Details Method for treating a signal in the presence of interference Method for treating a signal in the presence of interference

H - Electricity

04

B

H04B 1/707 (2006.01) H04B 7/216 (2006.01)

Patent

CA 2479570

The invention relates to methods for treating signals which are subjected to interference. According to the inventive method, when a signal is formed from a first wide band channel (WB) and a second narrow band channel (NB) modulating the same carrier (FO), wherein said signals are cut off during the duration of the interference (DME), a single phase loop (220,221,201-207) and a single code loop (222,223,208-218) are used to treat two channels simultaneously. The treatment of signals in GP-type satellite navigation systems is thus facilitated when they are subjected to interference by DME-type distance measurement signals, more generally the robustness of the treatment is increased by joint treatment of the bands which are broadcast to users.

L'invention concerne les procédés de traitement des signaux soumis à des interférences. Elle consiste, lorsque ce signal est formé d'un premier canal à large bande (WB) et d'un deuxième canal à bande étroite (NB) modulant une même porteuse (FO) dans lequel on coupe ces signaux pendant la durée des interférences (DME), à utiliser une seule boucle de phase (220,221,201-207) et une seule boucle de code (222,223,208-218) pour traiter ces deux canaux simultanément. Elle permet de faciliter le traitement des signaux dans les systèmes de navigation par satellite du type GPS lorsque ceux-ci sont brouillés par les signaux de système de mesure de distance du type DME, ainsi que plus généralement d'augmenter la robustesse du traitement par un traitement conjoint des bandes diffusées vers les utilisateurs.

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