Finite-length unequal error protection rateless codes: design and analysis

Finite-length unequal error protection rateless codes: design and analysis
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DOI:
10.1109/glocom.2005.1577872
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发表时间:
2005
期刊:
GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.
影响因子:
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通讯作者:
Nazanin Rahnavard;F. Fekri
Nazanin Rahnavard;F. Fekri
中科院分区:
其他
文献类型:
--
作者:
Nazanin Rahnavard;F. Fekri

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提出了一种推广的无速率码(LT和Raptor码)来提供不等错误保护(UEP)特性。在有限长度的情况下,对所提出的编码(UEP-LT和UEP-Raptor编码)在二进制擦除信道(BEC)上的最佳性能进行了分析。给出了最大似然译码下的误码概率的上界和下界。我们用模拟进一步验证了我们的工作。仿真结果表明,在小错误率的情况下,所提码的边界很紧,且具有较强的UEP特性。
A generalization of rateless codes (LT and Raptor codes) to provide unequal error protection (UEP) property is proposed in this paper. The proposed codes (UEP-LT and UEP-Raptor codes) are analyzed for the best possible performance over the binary erasure channel (BEC) in finite-length cases. We derive upper and lower bounds on the bit error probabilities under the maximum-likelihood (ML) decoding. We further verify our work with simulations. Simulation results indicate that the bounds are tight for small error rates, and the proposed codes have strong UEP property.