Multiple input frequency locked loop

Details Multiple input frequency locked loop Multiple input frequency locked loop

H - Electricity

03

L

H03L 7/08 (2006.01) G04G 7/00 (2006.01) H03L 7/14 (2006.01) H04J 3/06 (2006.01) H03L 7/087 (2006.01)

Patent

CA 2253461

A dual locked loop is disclosed comparing preferably a GPS signal with an E1 signal and the E1 signal with the output of the loop. The GPS signal is low pass filtered to provide a low pass filtered GPS versus E1 signal that is used as a calibration for a closed loop having a second low pass filter for filtering the comparisons of the E1 and the output signal. By appropriately selecting the filter parameters, the output stability can track the stability of the local oscillator driving the NCO for short term stability, the medium term stability of the E1 signal and the long term stability of the GPS signal.

Cette invention décrit une boucle fermée à double fréquence qui compare, de préférence, un signal GPS avec un signal E1 et le signal E1 avec la sortie de la boucle. Le signal GPS est filtré en passe-bas et donne un GPS filtré en basse fréquence comparativement au signal E1 qui est utilisé comme étalon d'une boucle fermée ayant un second filtre passe-bas fréquence pour mesurer la différence de fréquence entre le signal E1 et le signal de sortie. Si les paramètres de filtrage sont correctement choisis, la stabilité de sortie peut repérer la stabilité de l'oscillateur local qui commande la stabilité à court terme de l'oscillateur numériquement commandé (NCO), la stabilité à moyen terme du signal E1 et la stabilité à long terme du signal GPS.

Affiliated with

Also associated with

Rating

Multiple input frequency locked loop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple input frequency locked loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple input frequency locked loop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1540964