Error control coding arrangement for digital communications...

H - Electricity – 04 – L

Patent

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H04L 27/34 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2043782

A serial-parallel converter is arranged to convert an information sequence into a plurality of bit sequences. Two convolutional encoders are provided which respectively receive bit sequences from the serial-parallel converter. Each of the two convolutional encoders outputs first and second bit sequences. First parallel-serial converter receives the first bit sequences and converts them into third bit sequence, while second parallel-serial converter receives the second bit sequences and converts them into fourth bit sequence. The third and fourth bit sequences are used to modulate two carriers with a phase difference of .pi./2 radians.

L'invention est un convertisseur parallèle-série conçu pour convertir une suite d'informations en une pluralité de suites binaires. Deux codes convolutionnels connexes reçoivent respectivement des suites binaires transmises par le convertisseur de l'invention. Chacun de ces deux codeurs convolutionnels produit une première et une deuxième suite binaire. Le premier convertisseur parallèle-série reçoit les premières suites binaires et les convertit en une troisième suite binaire, alors que le second convertisseur parallèle-série reçoit les deuxièmes suites binaires et les convertit en une quatrième suite binaire. Les troisième et quatrième suites binaires sont utilisées pour moduler deux porteuses avec un déphasage de /2 radians.

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