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arXiv 1902.03575cs.ITmath.IT
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乘积型码的二进制消息传递译码

Binary Message Passing Decoding of Product-like Codes

Alireza Sheikh, Alexandre Graell i Amat, Gianluigi Liva

摘要:

基于分量码的有界距离译码(BDD),提出了一种新的乘积型码的二进制消息传递译码算法。该算法,称为迭代BDD与缩放的可靠性(iBDD-SR),利用信道的可靠性,因此是软的性质。然而,由组件解码器交换的消息是二进制(硬)消息,这显著地减少了解码器数据流。通过将信道可靠性与BDD解码器输出可靠性相结合来获得交换的二进制消息,通过应用于BDD判决的缩放因子来适当地传达。我们进行了密度演化分析广义低密度奇偶校验(GLDPC)码系综和空间耦合GLDPC码系综,从产品和阶梯码的iBDD-SR的缩放因子,分别可以得到。对于白加性高斯噪声信道,我们显示性能增益高达$0.29$ dB和$0.31$ dB的产品和阶梯码相比,传统的迭代BDD(iBDD)具有相同的解码器数据流。此外,我们表明,iBDD-SR的性能接近理想的iBDD,防止误校正。

英文摘要:

We propose a novel binary message passing decoding algorithm for product-like codes based on bounded distance decoding (BDD) of the component codes. The algorithm, dubbed iterative BDD with scaled reliability (iBDD-SR), exploits the channel reliabilities and is therefore soft in nature. However, the messages exchanged by the component decoders are binary (hard) messages, which significantly reduces the decoder data flow. The exchanged binary messages are obtained by combining the channel reliability with the BDD decoder output reliabilities, properly conveyed by a scaling factor applied to the BDD decisions. We perform a density evolution analysis for generalized low-density parity-check (GLDPC) code ensembles and spatially coupled GLDPC code ensembles, from which the scaling factors of the iBDD-SR for product and staircase codes, respectively, can be obtained. For the white additive Gaussian noise channel, we show performance gains up to $0.29$ dB and $0.31$ dB for product and staircase codes compared to conventional iterative BDD (iBDD) with the same decoder data flow. Furthermore, we show that iBDD-SR approaches the performance of ideal iBDD that prevents miscorrections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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