Digital transmission system for encoding and decoding...

Details Digital transmission system for encoding and decoding... Digital transmission system for encoding and decoding...

H - Electricity

04

L

H04L 1/22 (2006.01) H03M 13/29 (2006.01) H04B 17/00 (2006.01) H04L 1/00 (2006.01) H04L 7/04 (2006.01)

Patent

CA 2206688

Data are coded by means of a first error correcting code to produce first coded bits. Control data are coded using a heavily redundant second error corrected code and added modulo 2 to the first coded bits. Decoding is performed by ascertaining (15, 16) which valid codeword of the second code (when added to the received codeword) gives the lowest error count when the resultant is decoded according to the first code.

Des données sont codées grâce à un premier code correcteur d'erreurs de façon à produire des premiers bits codés. Les paramètres sont codés à l'aide d'un second code de correction d'erreurs fortement redondant et d'une addition modulo-2 aux premiers bits codés. On effectue le décodage en déterminant (15, 16) quel mot code valide du second code (lorsqu'il est ajouté au mot code reçu) donne le nombre d'erreur minimal lorsque la résultante est décodée en fonction du premier code.

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