Symbol lock detector

H - Electricity – 03 – K

Patent

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Details

H03K 19/0175 (2006.01) H03L 7/091 (2006.01) H03L 7/095 (2006.01) H04L 7/00 (2006.01) H04L 7/033 (2006.01)

Patent

CA 2274718

A simplified symbol lock detector which uses T/2-spaced signal samples in conjunction with an interpolator (12, 14, 16, 18, 20, 22) to approximate the T/4-shifted signal samples used by conventional symbol lock detectors. The approximated T/4-shifted signal samples are processed by a phase detector (24, 26) prior to input to a threshold detector (28) which indicates proper symbol lock if the lock signal exceeds a predetermined threshold.

Le détecteur de verrouillage de symboles simplifié utilise des échantillons de signaux espacés T/2 agrémenté d'un interpolateur permettant de rapprocher par approximation les échantillons des signaux décalés T/4 utilisés par les détecteurs de verrouillage de symboles habituels. Les échantillons de signaux décalés et les T/4 approchés traités par un détecteur de phase avant la sortie vers un détecteur de seuil indiquent le verrouillage de symboles correct si le signal de verrouillage dépasse le seuil prédéterminé.

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