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arXiv 1703.04414cs.ITmath.IT
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极化码的动态SCFlip译码

Dynamic-SCFlip Decoding of Polar Codes

Ludovic Chandesris, Valentin Savin, David Declercq

摘要:

本文提出了最近引入的极性码的连续抵消翻转(SCFlip)解码的一般化,其特征在于多个额外的解码尝试,其中一个或多个位置从标准连续抵消(SC)解码翻转。为了使这种方法有效,我们首先引入高阶位翻转的概念,并提出一种新的度量来确定更有可能纠正SC解码轨迹的位翻转。然后,我们提出了一个广义的SCFlip解码算法,称为动态SCFlip(D-SCFlip),它动态地建立一个列表的候选位翻转,同时保证额外的解码尝试执行成功的概率降低。仿真结果表明,D-SCFlip是极化码SC-List译码的有效替代方案,具有非常好的纠错性能,平均计算复杂度接近SC译码器。

英文摘要:

This paper proposes a generalization of the recently introduced Successive Cancellation Flip (SCFlip) decoding of polar codes, characterized by a number of extra decoding attempts, where one or several positions are flipped from the standard Successive Cancellation (SC) decoding. To make such an approach effective, we first introduce the concept of higher-order bit-flips, and propose a new metric to determine the bit-flips that are more likely to correct the trajectory of the SC decoding. We then propose a generalized SCFlip decoding algorithm, referred to as Dynamic-SCFlip (D-SCFlip), which dynamically builds a list of candidate bit-flips, while guaranteeing that extra decoding attempts are performed by decreasing probability of success. Simulation results show that D-SCFlip is an effective alternative to SC-List decoding of polar codes, by providing very good error correcting performance, with an average computation complexity close to the one of the SC decoder.

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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