Anti-jamming method for spread-spectrum radio signal receivers

H - Electricity – 04 – B

Patent

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Details

H04B 7/10 (2006.01) H04B 7/08 (2006.01)

Patent

CA 2470369

The invention concerns a method for improving resistance to deliberate or accidental jamming of a receiver of spread-spectrum radio signals transmitted by polarized wave. It consists in equipping the receiver (2) with an antenna array (1) consisting of elementary antennae (1a to 1f) having at least a so-called called adapted output channel MP sensitive to the polarization of the polarized wave used for transmission, some (1b, 1d, 1e, 1f, 1g) further comprising a second so-called cross output channel CP sensitive to polarization orthogonal to that of the polarized wave used for transmission and in carrying out first individual anti-jamming processing operations by polarimetric filtering (3) on each of the elementary antennae (1b, 1d, 1e, 1f, 1g) with adapted MP and cross CP output channels, then, globally, at the level of the reception signals obtained and the reception signals of the elementary antennae (1a, 1c) without operated cross output channel CP, a second general anti-jamming processing operation by spatial filtering (4). In addition, the invention can integrate supplementary anti-jamming processing operations by temporal or spectral filtering.

L'invention concerne l'amélioration de la résistance aux brouillages intentionnels ou non, d'un récepteur de signaux radioélectriques à spectre étalé transmis par onde polarisée. Elle consiste à doter le récepteur (2) d'une antenne réseau (1) composée d'antennes élémentaires (1a à 1g) ayant au moins une voie de sortie dite adaptée MP sensible à la polarisation de l'onde polarisée utilisée pour la transmission, certaines (1b, ld, le, 1f, lg) ayant en outre une deuxième voie dite croisée utilisée pour la transmission et à effectuer des premiers traitements individuels d'antibrouillage par filtrage polarimétrique (3) sur chacune des antennes élémentaires (1b, 1d, le, 1f, 1g) à voies de sorties adaptée MP et croisée CP puis, globalement, au niveau des signaux de réception obtenus et des signaux de réception des antennes élémentaires (la, 1c) sans voie de sortie croisée CP exploitée, un deuxième traitement général d'antibrouillage par filtrage spatial (4). De plus, l'invention peut intégrer des traitements supplémentaires d'antibrouillage par filtrage temporel ou spectral.

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