Extended list output and soft symbol output viterbi algorithms

H - Electricity – 03 – M

Patent

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Details

H03M 13/00 (2006.01) H03M 7/00 (2006.01) H03M 13/41 (2006.01) H03M 13/45 (2006.01)

Patent

CA 2110244

A family of extended Generalized Viterbi Algorithm (GVA) and Soft Output Viterbi Algorithm (SOVA) decoders is disclosed. In one embodiment structural aspects of a SOVA are used to develop a new implementation for a serial GVA. Another aspect of the invention provides a low complexity SOVA that generates a reliability measure for decoded information using a list output of the GVA. In a further aspect, reliability information from a SOVA is used to develop a low complexity GVA.

Une famille de décodeurs GVA (Generalized Viterbi Algorithm) étendus et de décodeurs SOVA (Soft Output Viterbi Algorithm) est décrite. Dans une réalisation, les aspects structuraux d'un SOVA sont utilisés pour mettre en oeuvre une nouvelle version d'un GVA série. Un autre aspect de l'invention permet de réaliser un SOVA à faible complexité qui génère une mesure de fiabilité des informations décodées, au moyen d'une liste produite par le GVA. Dans un autre aspect de l'invention, les informations de fiabilité produites par un SOVA sont utilisées pour mettre au point un GVA de faible complexité.

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