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Trellis decoding techniques and their performance in the adder channel for synchronous and asynchronous CCMA codes

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Publication date1997
Host publicationCryptography and coding: 6th IMA International Conference Cirencester, UK, December 17–19, 1997 Proceedings
EditorsMichael Darnell
Place of PublicationBerlin
Number of pages7
ISBN (Electronic)978-3-540-69668-1
ISBN (Print)978-3-540-63927-5
<mark>Original language</mark>English

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743


A novel technique that allows efficient trellis decoding for M-choose-T synchronous collaborative coding multiple access (CCMA) codes is investigated. The results show that a sufficient performance improvement is achieved without the need for additional information regarding the active users. The application of the proposed technique to asynchronous CCMA codes is also analysed. The modified decoding procedure shows a further improvement when compared to the conventional hard decoding technique.