The soft-output successive cancellation list (SOSCL) decoder provides a methodology for estimating the a-posteriori probability log-likelihood ratios by only leveraging the conventional SCL decoder for polar codes. However, the sequential nature of SCL decoding leads to a high decoding latency for the SO-SCL decoder. In this paper, we propose a soft-output fast SCL (SO-FSCL) decoder by incorporating node-based fast decoding into the SO-SCL framework. Simulation results demonstrate that the proposed SO-FSCL decoder significantly reduces the decoding latency without loss of performance compared with the SO-SCL decoder.

翻译：软输出连续消除列表（SO-SCL）译码器提供了一种仅利用传统极化码SCL译码器来估计后验概率对数似然比的方法。然而，SCL译码的顺序特性导致SO-SCL译码器具有较高的译码延迟。本文提出了一种软输出快速SCL（SO-FSCL）译码器，通过将基于节点的快速译码技术融入SO-SCL框架中实现。仿真结果表明，与SO-SCL译码器相比，所提出的SO-FSCL译码器在保持性能不变的同时显著降低了译码延迟。