Design of LT Codes with Equal and Unequal Erasure Protection over Binary Erasure Channels
2013 (English)In: IEEE Communications Letters, ISSN 1089-7798, Vol. 17, no 2, 261-264 p.Article in journal (Refereed) Published
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.
LT codes, erasure channels, erasure floor, unequal erasure protection
IdentifiersURN: urn:nbn:se:kth:diva-114274DOI: 10.1109/LCOMM.2013.011113.122283ISI: 000316260700006ScopusID: 2-s2.0-84874992456OAI: oai:DiVA.org:kth-114274DiVA: diva2:588257
FunderEU, European Research Council, 228044Swedish Research Council, 621-2009-4666 621-2008-4249
QC 201304122013-01-152013-01-152013-04-12Bibliographically approved