论文标题
联合连续取消列表解码了双极代码
Joint Successive Cancellation List Decoding for the Double Polar codes
论文作者
论文摘要
作为一种新的联合源通道编码方案，最近提出了双极（D极性）代码。在这封信中，提出了一种新型的联合源通道解码器，即联合连续取消列表（J-SCL）解码器，提议提高D-Polar代码的解码性能。我们合并源极性代码的格子和通道极性代码的格子，以构建复合格子。在这个化合物的格子中，联合源通道节点既代表信息位又代表高渗透位。基于复合格子，J-SCL解码器旨在通过组合源SCL解码和通道SCL解码来恢复源消息。 J-SCL解码器将每个解码水平的解码路径的数量加倍，然后使用最小的关节路径线（JPM）保留L路径。对于JSC节点，考虑到频道决策日志可能比率（LLRS）和源决策LLR，将更新JPM。仿真结果表明，J-SCL解码器的表现优于涡轮样BP（TL-BP）解码器，其复杂性较低。
As a new joint source-channel coding scheme, the double polar (D-Polar) codes have been proposed recently. In this letter, a novel joint source-channel decoder, namely the joint successive cancellation list (J-SCL) decoder, is proposed to improve the decoding performance of the D-Polar codes. We merge the trellis of the source polar code and that of the channel polar code to construct a compound trellis. In this compound trellis, the joint source-channel nodes represent both of the information bits and the high-entropy bits. Based on the compound trellis, the J-SCL decoder is designed to recover the source messages by combining the source SCL decoding and channel SCL decoding. The J-SCL decoder doubles the number of the decoding paths at each decoding level and then reserves the L paths with the smallest joint path-metric (JPM). For the JSC node, the JPM is updated considering both the channel decision log-likelihood ratios (LLRs) and the source decision LLRs. Simulation results show that the J-SCL decoder outperforms the turbo-like BP (TL-BP) decoder with lower complexity.
