arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2401.07433cs.ITmath.IT
收藏

基于2×2核的非二进制极化码的快速逐次抵消译码:识别、译码与简化

Fast Successive-Cancellation Decoding of 2 x 2 Kernel Non-Binary Polar Codes: Identification, Decoding and Simplification

Ali Farsiabi, Hamid Ebrahimzad, Masoud Ardakani, Chuandong Li

AI总结:

本文针对基于2×2核的非二进制极化码,通过识别SC译码树中的特殊节点并设计简化结构,提出快速SC译码方法,在无误码率损失下将时延最多降低95%。

摘要:

与二进制极化码(BPCs)相比,采用逐次抵消(SC)算法译码的非二进制极化码(NBPCs)具有显著的误比特率性能优势。由于SC译码的串行特性,其存在较大的译码时延。二进制极化码中的时延问题已被广泛研究,并通过引入基于SC的快速译码器得到了显著解决。然而,关于非二进制极化码的绝大多数研究都集中在设计及高效实现等相关问题上。在本文中,我们针对基于2×2核构造的非二进制极化码提出了快速SC译码方法。具体而言,我们在非二进制极化码的SC译码树中识别出多种非二进制特殊节点,并提出了针对这些节点的快速译码方案。通过这种方式,我们避免了遍历完整的译码树,与逐符号SC译码相比显著降低了译码延迟。我们还提出了一种简化的非二进制极化码结构,以促进非二进制快速SC译码过程的执行。利用我们所提出的快速非二进制译码器,我们观察到相对于原始SC译码,时延最多可改善95%。与此同时,我们为非二进制极化码提出的快速SC译码器不会带来任何误码率损失。

英文摘要:

Non-binary polar codes (NBPCs) decoded by successive cancellation (SC) algorithm have remarkable bit-error-rate performance compared to the binary polar codes (BPCs). Due to the serial nature, SC decoding suffers from large latency. The latency issue in BPCs has been the topic of extensive research and it has been notably resolved by the introduction of fast SC-based decoders. However, the vast majority of research on NBPCs is devoted to issues concerning design and efficient implementation. In this paper, we propose fast SC decoding for NBPCs constructed based on 2 x 2 kernels. In particular, we identify various non-binary special nodes in the SC decoding tree of NBPCs and propose their fast decoding. This way, we avoid traversing the full decoding tree and significantly reduce the decoding delay compared to symbol-by-symbol SC decoding. We also propose a simplified NBPC structure that facilitates the procedure of non-binary fast SC decoding. Using our proposed fast non-binary decoder, we observed an improvement of up to 95% in latency concerning the original SC decoding. This is while our proposed fast SC decoder for NBPCs incurs no error-rate loss.

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。

↑