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Design of LT Codes with Equal and Unequal Erasure Protection over Binary Erasure Channels
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-5407-0835
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-7182-9543
2013 (English)In: IEEE Communications Letters, ISSN 1089-7798, E-ISSN 1558-2558, Vol. 17, no 2, 261-264 p.Article in journal (Refereed) Published
Abstract [en]

The erasure floor performance of Luby Transform (LT) codes is mainly determined by the minimum variable-node degree. Thus we propose a modified encoding scheme that maximizes the minimum variable-node degree for transmission over binary erasure channels. The proposed scheme leads to an almost-regular variable-node degree distribution. The encoding process is generalized to accommodate arbitrary variable-node degree distributions for additional improved performance. The asymptotic performance is investigated using density evolution and compared with a conventional LT code. The scheme is further extended to enable a higher level of unequal erasure protection.

Place, publisher, year, edition, pages
2013. Vol. 17, no 2, 261-264 p.
Keyword [en]
LT codes, erasure channels, erasure floor, unequal erasure protection
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-114274DOI: 10.1109/LCOMM.2013.011113.122283ISI: 000316260700006Scopus ID: 2-s2.0-84874992456OAI: oai:DiVA.org:kth-114274DiVA: diva2:588257
Funder
EU, European Research Council, 228044Swedish Research Council, 621-2009-4666 621-2008-4249
Note

QC 20130412

Available from: 2013-01-15 Created: 2013-01-15 Last updated: 2017-12-06Bibliographically approved

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Xiao, MingRasmussen, Lars

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