Vehicular tracking and location

Details Vehicular tracking and location Vehicular tracking and location

G - Physics

01

S

G01S 3/72 (2006.01) G01S 1/04 (2006.01) G01S 1/24 (2006.01) G01S 3/08 (2006.01) G01S 3/30 (2006.01) G08G 1/123 (2006.01)

Patent

CA 2265721

This disclosure deals with processing radio-frequency navigation signals, particularly Loran-C signals, from crossed loop antennas (H-field antennas) by shifting the signal phase from two loops to be in quadrature with respect to each other and adding them together to achieve omnidirectivity of the antenna pattern during the acquisition mode; using the stronger signal of the two during the cycle selection mode to determine the polarity of the received signals; and calculating the relative bearing angles on transmitting stations to determine, with measured bearing, the orientation of the loop antenna with respect to these stations.

L'invention porte sur un procédé de traitement de signaux H.F. de navigation, notamment du type Loran-C, captés par des antennes à cadres croisés (antennes à champ en H) consistant: à décaler le signal de phase des deux cadres pour les mettre en quadrature l'un par rapport à l'autre; à les additionner de manière à obtenir un diagramme d'antenne omnidirectionnel en mode d'acquisition; à retenir le plus fort des deux signaux, en mode de sélection de cycle; et à calculer les angles de relèvement relatifs des stations émettrices de façon à déterminer, à partir de relèvements, l'orientation de l'antenne à cadres par rapport à ces stations.

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