Performance improvement of rateless code by non-uniform selection of messages in encoding

LT(Luby transform) encoding is widely used for rateless codes. But uniform choice of messages in the LT encoding process conflicts with the merit of BP(belief propagation) decoding. So more codeword symbols than expected are required for the reliable recovery of message symbols. Thus a new encoding...

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Bibliographic Details
Published inTENCON 2011 - 2011 IEEE Region 10 Conference pp. 517 - 520
Main Authors Hyung Taek Lim, Eon Kyeong Joo
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2011
Subjects
Computational complexity
Decoding
Encoding
erasure correction codes
Error correction codes
non-uniform selection
rateless codes
Receivers
Telecommunication standards
Transmitters
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Summary:LT(Luby transform) encoding is widely used for rateless codes. But uniform choice of messages in the LT encoding process conflicts with the merit of BP(belief propagation) decoding. So more codeword symbols than expected are required for the reliable recovery of message symbols. Thus a new encoding scheme with non-uniform selection of messages that can decrease average overhead and computational complexity is proposed and its performance is analyzed and compared with the conventional encoding scheme in this paper.
ISBN:9781457702563
1457702568
ISSN:2159-3442
2159-3450
DOI:10.1109/TENCON.2011.6129158