Unequal error protection of LT codes over noisy channels
Date
2012
Authors
Hussain, I.
Xiao, M.
Rasmussen, L.
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Conference paper
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2012 Swedish Communication Technologies Workshop (Swe-CTW), 2012, iss.6376281, pp.19-24
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2012 Swedish Communication Technologies Workshop (24 Oct 2012 - 26 Oct 2012 : Lund, Sweden)
Abstract
We propose a new unequal error protection (UEP) scheme for Luby Transform (LT) codes over additive white Gaussian noise (AWGN) channels. In contrast to the state-of-the-art UEP scheme for LT codes where the effective code rates are exploited for UEP, we characterize the variable-node degree distribution to achieve UEP for LT codes. For performance analysis, we compare the lower bounds on bit error rate for our proposed scheme and a conventional UEP-based LT codes over AWGN channels for various parameters. Moreover, it is demonstrated through numerical examples that our proposed UEP scheme has better performance than the conventional UEP-based LT codes over a wide range of code rates and channel conditions.
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Copyright 2012 IEEE