Satellite navigation receiver signal processing architecture

G - Physics – 01 – S

Patent

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G01S 5/14 (2006.01)

Patent

CA 2628136

A satellite navigation device 110 including a flexible RF receiver 200 is described. The receiver 200 receives a signal 114 that includes at least one spread-spectrum signal from a first satellite. The receiver 200 has at least a first channel 214 that includes at least two sub-channel circuits 436. Each sub-channel circuit 436 has at least a first signal generator 418 and a first mixer 420 to receive a respective frequency band in at least the one spread- spectrum signal from the first satellite. The first signal generator 418 provides a respective first signal, having a respective first carrier frequency, to down convert at least a portion of the signal, using the first mixer 420, to an intermediate frequency that is common to the two sub-channel circuits.

La présente invention concerne un dispositif de navigation par satellite (110) comprenant un récepteur RF souple (200). Ce récepteur (200) reçoit un signal (114) qui comprend au moins un signal de spectre étalé en provenance d'un premier satellite. Ce récepteur (200) possède au moins un premier canal (214) qui comprend au moins deux circuits de sous canal (436). Chaque circuit de sous canal (436) possède au moins un premier générateur de signal (418) et un premier mélangeur (420) permettant de recevoir une bande de fréquences respective dans le signal de spectre étalé en provenance du premier satellite. Le premier générateur de signal (418) fournit un premier signal respectif, possédant une première fréquence porteuse respective de façon à abaisser la fréquence d'au moins une partie du signal, en utilisant le premier mélangeur (420), à une fréquence intermédiaire qui est commune aux deux circuits de sous canal.

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