H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/18 (2006.01) G01S 1/00 (2006.01) G01S 5/14 (2006.01) G01S 11/10 (2006.01) H03L 7/10 (2006.01)
Patent
CA 2219647
A method for automatically reducing carrier acquisition and tracking thresholds for carriers received in orbit by a receiver accessing an orbital navigator inside or outside the receiver, wherein said receiver comprises at least one phase loop. The phase loop is used for carrier acquisition and/or tracking and 'pushed' by a fine speed aid, and compensates for the error between the actual speed and the computed speed. The carrier Doppler frequency search is carried out around a frequency prediction maintained by the fine speed aid from the orbital navigator.
La présente invention concerne un procédé de réduction autonome des seuils d'acquisition et de poursuite des porteuses reçues en orbite par un récepteur accédant à un navigateur orbital interne ou externe audit récepteur, ce récepteur comportant au moins une boucle de phase. Cette boucle de phase, chargée de l'acquisition et/ou de la poursuite de la porteuse, est "poussée" par l'aide de vitesse fine, et rattrape l'erreur entre la vitesse réelle et la vitesse calculée. La recherche de la fréquence Doppler de la porteuse reçue s'effectue autour d'une prédiction de fréquence entretenue par l'aide de vitesse fine provenant du navigateur orbital.
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