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An early decision decoding algorithm for LDPC codes using dynamic thresholds
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
Linköping University, Department of Electrical Engineering.ORCID iD: 0000-0003-3470-3911
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
2005 (English)In: European Conference on Circuit Theory and Design,2005, IEEE , 2005, III/285- p.Conference paper, Published paper (Refereed)
Abstract [en]

Low-density parity-check codes have recently received extensive attention as a forward error correction scheme in a wide area of applications. The decoding algorithm is inherently parallelizable, allowing communication at high speeds. One of the main disadvantages, however, is large memory requirements for interim storing of decoding data. In this paper, we investigate a modification to the decoding algorithm, using early decisions for bits with high reliabilities. This reduces the amount of messages passed by the algorithm, which can be expected to reduce the switching activity of a hardware implementation. While direct application of the modification results in severe performance penalties, we show how to adapt the algorithm to reduce the impact, resulting in a negligible decrease in error correction performance.

Place, publisher, year, edition, pages
IEEE , 2005. III/285- p.
Keyword [en]
Error-correcting codes
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-34451Local ID: 21483OAI: oai:DiVA.org:liu-34451DiVA: diva2:255299
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2015-03-11

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http://www.es.isy.liu.se/publications/papers_and_reports/2005/antonb_ecctd_2005.pdf

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Blad, AntonGustafsson, OscarWanhammar, Lars

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