Frequency stabilizing device

H - Electricity – 03 – D

Patent

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Details

H03D 1/04 (2006.01) H03J 7/06 (2006.01) H04B 1/40 (2006.01)

Patent

CA 2123748

ABSTRACT OF THE DISCLOSURE An intermediate frequency (IF) converter converts a received signal to an IF signal. A demodulator demodulates the IF signal to a demodulated signal and detects a phase error. A frequency error detector detects a frequency error based on the phase error. A modulated-carrier detector detects a modulated carrier component from the IF signal. When the modulated carrier component is detected, a controller achieves a frequency stabilizing operation based on the frequency error.

Un convertisseur FI (fréquence intermédiaire) convertit un signal reçu en signal FI. Un démodulateur démodule le signal FI et détecte une erreur de phase. Un détecteur d'erreur de fréquence détecte une erreur de fréquence en fonction de l'erreur de phase. Un détecteur de porteuse modulée détecte à partir du signal FI une composante porteuse modulée. Lorsque la composante porteuse modulée est détectée, un contrôleur effectue une opération de stabilisation de fréquence en fonction de l'erreur de fréquence.

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