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  4. Inactivation Decoding of LT and Raptor Codes: Analysis and Code Design
 
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Inactivation Decoding of LT and Raptor Codes: Analysis and Code Design

Publikationstyp
Journal Article
Date Issued
2017-10
Author(s)
Lazaro, Francisco  
Liva, Gianluigi  
Bauch, Gerhard  
Institut
Nachrichtentechnik E-8  
TORE-URI
http://hdl.handle.net/11420/3210
Journal
IEEE transactions on communications  
Volume
65
Issue
10
Start Page
4114
End Page
4127
Article Number
7949022
Citation
IEEE Transactions on Communications 10 (65): 7949022 (2017-10)
Publisher DOI
10.1109/TCOMM.2017.2715805
Scopus ID
2-s2.0-85021798990
In this paper, we analyze Luby transform (LT) and Raptor codes under inactivation decoding. A first-order analysis is introduced, which provides the expected number of inactivations for an LT code, as a function of the output distribution, the number of input symbols, and the decoding overhead. The analysis is then extended to the calculation of the distribution of the number of inactivations. In both cases, random inactivation is assumed. The developed analytical tools are then exploited to design LT and Raptor codes, enabling a tight control on the decoding complexity versus failure probability tradeoff. The accuracy of the approach is confirmed by numerical simulations.
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