Title :
Performance improvement of rateless code by non-uniform selection of messages in encoding
Author :
Lim, Hyung Taek ; Joo, Eon Kyeong
Author_Institution :
Sch. of Electron. Eng., Kyungpook Nat. Univ., Daegu, South Korea
Abstract :
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.
Keywords :
computational complexity; decoding; transform coding; BP decoding; LT encoding; Luby transform encoding; belief propagation decoding; codeword symbols; computational complexity; message nonuniform selection; message symbol recovery; rateless code; Computational complexity; Decoding; Encoding; Error correction codes; Receivers; Telecommunication standards; Transmitters; erasure correction codes; non-uniform selection; rateless codes;
Conference_Titel :
TENCON 2011 - 2011 IEEE Region 10 Conference
Conference_Location :
Bali
Print_ISBN :
978-1-4577-0256-3
DOI :
10.1109/TENCON.2011.6129158
