Iterative switched decoding for interleave-division multiple-access systems
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
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.
IdentifiersURN: urn:nbn:se:kth:diva-62616DOI: 10.1109/TVT.2007.912165ISI: 000256026100054OAI: oai:DiVA.org:kth-62616DiVA: diva2:480795
QC 201201202012-01-192012-01-192012-01-20Bibliographically approved