Carrier phase lock detecting apparatus used in psk-modulated...

H - Electricity – 04 – L

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Details

H04L 27/22 (2006.01) H03L 7/095 (2006.01) H03L 7/107 (2006.01) H04B 7/185 (2006.01) H04L 27/227 (2006.01)

Patent

CA 2108217

In a PSK-modulating arrangement including a voltage controlled oscillator (VCO), a demodulator, a phase detector and a loop filter, a carrier phase lock detecting apparatus is equipped with the arrangement, the apparatus comprising a first multiplier for inversely modulating a demodulated signal by a reference carrier signal from the VCO, a second multiplier for multiplying the output of the first multiplier by an input PSK-modulated signal and a decision circuit for detecting carrier phase lock in response to the output of the second multiplier.

L'invention est un dispositif de modulation par déplacement de phase comportant un oscillateur commandé par la tension, un démodulateur, un détecteur de phase et un filtre à boucle. Un détecteur de verrouillage de phase de porteuse utilisant ce dispositif comprend un premier multiplicateur servant à moduler un signal démodulé par un signal de référence obtenu de l'oscillateur, un second multiplicateur servant à multiplier le signal de sortie du premier multiplicateur par un signal modulé par déplacement de phase et un circuit de décision servant à détecter le verrouillage de phase de la porteuse en réponse à la réception du signal de sortie du second multiplicateur.

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