论文标题
改进了具有动态可靠性评分的产品代码的软辅助解码
Improved Soft-aided Decoding of Product Codes with Dynamic Reliability Scores
论文作者
论文摘要
产品代码（PC）通常以高效访问限制距离解码（IBDD）为基于硬击击式通道输出的有效迭代界限解码（IBDD）进行解码，与软式否决解码器相比，这些频道输出需要性能损失。最近，已经提出了几种混合算法，旨在通过一定量的软信息来提高IBDD解码器的性能，同时保持解码的复杂性与IBDD相似。我们提出了一种基于错误和蠕虫（EAE）解码和动态可靠性评分（DRSS）的PCS的新型混合型低复合解码器。该解码器基于一种新颖的EAE组件代码解码器，该解码器能够超出组件代码的设计距离，但遭受了增加的不良概率。反映代码字位可靠性的DRS用于检测和避免错误。仿真结果表明，该策略可以大大降低误差率并改善解码性能。与IBDD相比，解码器仅需要三元消息传递和计算复杂性的略有增加，这使其适用于高速通信系统。与常规的IBDD解码器相比，编码得分高达1.2 dB。
Products codes (PCs) are conventionally decoded with efficient iterative bounded-distance decoding (iBDD) based on hard-decision channel outputs which entails a performance loss compared to a soft-decision decoder. Recently, several hybrid algorithms have been proposed aimed to improve the performance of iBDD decoders via the aid of a certain amount of soft information while keeping the decoding complexity similarly low as in iBDD. We propose a novel hybrid low-complexity decoder for PCs based on error-and-erasure (EaE) decoding and dynamic reliability scores (DRSs). This decoder is based on a novel EaE component code decoder, which is able to decode beyond the designed distance of the component code but suffers from an increased miscorrection probability. The DRSs, reflecting the reliability of a codeword bit, are used to detect and avoid miscorrections. Simulation results show that this policy can reduce the miscorrection rate significantly and improves the decoding performance. The decoder requires only ternary message passing and a slight increase of computational complexity compared to iBDD, which makes it suitable for high-speed communication systems. Coding gains of up to 1.2 dB compared to the conventional iBDD decoder are observed.
