Method and device for use with phase modulated signals

H - Electricity – 03 – D

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H03D 3/00 (2006.01) H03D 3/06 (2006.01) H04L 27/20 (2006.01) H04L 27/233 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2258349

A device and a method for deviation detection for use during transfer of a phase shift modulated information-carrying signal between a transmitter and a receiver. The deviation detector makes use of the presence of phase-linear segments, i.e. parts of sequences of phase changes with consecutively the same phase change. The deviation detector extracts segments consisting of three or more consecutive phase changes with determined same phase change. An identification of the filtered-out segments is performed in order to determine which nominal phase-linear sequences the segments belong to. After this, the deviation and possibly a correction signal can be calculated.

L'invention porte sur un dispositif et un procédé de détection d'écarts s'utilisant pendant le transfert, entre un émetteur et un récepteur, d'un signal porteur d'informations modulé par déplacement de phase. Le détecteur d'écarts utilise la présence de segments à linéarité de phases, c'est à dire des parties de séquences de variations de phase présentant consécutivement la même variation de phase. Le détecteur d'écarts extrait les segments consistant en trois ou plus de trois variations consécutives de phase présentant une variation de phase identique déterminée. L'identification des segments rejetés par filtrage s'effectue de manière à déterminer à quelles séquences à phase linéaire nominale appartiennent les segments. On peut ensuite calculer l'écart et éventuellement un signal de correction.

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