System and method for multi-correlation with...

Details System and method for multi-correlation with... System and method for multi-correlation with...

G - Physics

01

S

G01S 1/00 (2006.01)

Patent

CA 2723932

The system for receiving a radionavigation signal, notably in a jammed medium, emitted by a satellite of a satellite positioning system, comprises: - at least one first multi-correlator (MC1) and at least one second multi-correlator (MC2) disposed in parallel and operating respectively at a frequency F code; - filtering means (FILT), disposed upstream of said multi-correlators (MC1, MC2); - a delay line (LAR), disposed on the branch, between said filtering means (FILT) and said second multi-correlator (MC2); - means (SS_ECH) for sub-sampling at the frequency F code adapted for sub-sampling the signal transmitted directly and by branching with delay by said filtering means (FILT); and - demodulation means (BDB_D) for eliminating the Doppler effect, disposed between said sub-sampling means (SS_ECH) and said first and second multi-correlators (MC1, MC2).

Le système de réception d'un signal de radionavigation, notamment en milieu brouillé, émis par un satellite d'un système de positionnement par satellites, comprend : au moins un premier multi-corrélateurs (MC1) et au moins un deuxième multi-corrélateurs (MC2) disposés en parallèle et fonctionnant respectivement à une fréquence Fcode; des moyens de filtrage (FILT), disposés en amont desdits multi- corrélateurs (MC1, MC2); une ligne à retard (LAR), disposée sur la dérivation, entre lesdits moyens de filtrage (FILT) et ledit deuxième multi-corrélateurs (MC2); des moyens de sous-échantillonnage (SS_ECH) à la fréquence Fcode adaptés pour sous-échantillonner le signal transmis directement et par dérivation avec retard par lesdits moyens de filtrage (FILT); et des moyens de démodulation (BDB_D) pour éliminer l'effet Doppler, disposé entre lesdits moyens de sous-échantillonnage (SS_ECH) et lesdits premier et deuxième multi-corrélateurs (MC1, MC2).

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