Frequency tracking using inner and outer loops

Details Frequency tracking using inner and outer loops Frequency tracking using inner and outer loops

H - Electricity

04

B

H04B 1/711 (2011.01)

Patent

CA 2491518

Techniques for inner/outer loop tracking that is stable and provides desirable loop convergence characteristics are disclosed. In one aspect, the contribution from any one inner loop to the tracking function of the outer loop (260) is limited, to prohibit any one received signal component from dominating the outer loop. In another aspect, the rate of outer loop tracking variation is controlled to provide inner and outer loop stability. Various other aspects are also presented. These aspects have the benefit of providing stable inner and outer loop control, as well as efficient convergence and tracking by the various loops, resulting in reduced frequency error and improved communication performance.

L'invention concerne des techniques destinées au suivi de boucles interne/externe qui est stable et engendre des caractéristiques de convergence de boucles souhaitables. Selon un aspect de cette invention, la contribution d'une boucle interne quelconque à la fonction de suivi de la boucle externe (260) est limitée, de manière à empêcher tout composant de signal reçu de dominer la boucle externe. Selon un autre aspect, le taux de variation de suivi de la boucle externe est commandé pour fournir une stabilité de boucles interne et externe. Différents autres aspects sont également présentés. Ces aspects ont trait à la commande stable des boucles interne et externe, ainsi qu'à la convergence efficace et au suivi par les diverses boucles, ce qui débouche sur une diminution de l'erreur de fréquences et une amélioration de l'efficacité de communication.

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