Windowed Decoding of Protograph-Based LDPC Convolutional Codes Over Erasure Channels
Windowed Decoding of Protograph-Based LDPC Convolutional Codes Over Erasure Channels
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DOI：
10.1109/tit.2011.2177439
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发表时间：
2010-10
影响因子：
2.5
通讯作者：
Aravind R. Iyengar;M. Papaleo;P. Siegel;J. Wolf;A. Vanelli‐Coralli;G. Corazza
中科院分区：
文献类型：
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作者：
Aravind R. Iyengar;M. Papaleo;P. Siegel;J. Wolf;A. Vanelli‐Coralli;G. Corazza
我们考虑一种基于置信传播（BP）算法的LDPC卷积码加窗译码方案。我们讨论了这种解码方案的优点，并确定某些特性的LDPC卷积码合奏表现出良好的性能与窗口解码器。我们将考虑这些合奏和代码的性能擦除通道和没有记忆。我们表明，LDPC卷积码的结构是合适的，以获得性能接近理论极限的无记忆擦除信道，无论是BP解码器和窗口解码。然而，相同的结构对具有存储器的擦除通道的性能施加了限制。
We consider a windowed decoding scheme for LDPC convolutional codes that is based on the belief-propagation (BP) algorithm. We discuss the advantages of this decoding scheme and identify certain characteristics of LDPC convolutional code ensembles that exhibit good performance with the windowed decoder. We will consider the performance of these ensembles and codes over erasure channels with and without memory. We show that the structure of LDPC convolutional code ensembles is suitable to obtain performance close to the theoretical limits over the memoryless erasure channel, both for the BP decoder and windowed decoding. However, the same structure imposes limitations on the performance over erasure channels with memory.