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Iterative switched decoding for interleave-division multiple-access systems
University of South Australia. (Institute for Telecommunications Research)
University of South Australia. (Institute for Telecommunications Research)ORCID iD: 0000-0001-7182-9543
2008 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 57, no 3, 1939-1944 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we consider an interleave-division multiple-access (IDMA) system with multiple users transmitting over a shared additive white Gaussian noise channel. In an IDMA system, the information sequence of each user is encoded by a low-rate serially concatenated code consisting of a convolutional code and a repetition code. To reduce decoding complexity, it has been proposed to only decode the inner repetition code for the first few iterations before including the full concatenated code constraints into the decoding process. Here, we characterize this concept of switched decoding as the parallel decoding of two complementary punctured codes and propose a systematic design procedure based on the extrinsic information transfer chart and trajectory analyses, leading to the best decoding convergence-complexity tradeoffs.

Place, publisher, year, edition, pages
2008. Vol. 57, no 3, 1939-1944 p.
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URN: urn:nbn:se:kth:diva-62616DOI: 10.1109/TVT.2007.912165ISI: 000256026100054OAI: diva2:480795
QC 20120120Available from: 2012-01-19 Created: 2012-01-19 Last updated: 2012-01-20Bibliographically approved

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Rasmussen, Lars Kildehöj
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