arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.03869cs.ITmath.IT
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极化码的快速扫描解码

Fast-SCAN decoding of Polar Codes

Charles Pillet, Carlo Condo, Valerio Bioglio

摘要:

极化码能够在连续消除(SC)解码下实现无记忆信道的容量。软消除(SCAN)是一种基于SC调度的软输出解码器,可用于极化码的迭代解码和级联。然而,这种解码器的顺序性质导致高解码延迟相比,国家的最先进的代码。为了减少延迟的扫描,在本文中,我们确定特殊节点的解码树,对应于特定的冻结位序列,并提出了专门的低延迟解码方法,他们每个人。与标准SCAN相比,所得到的快速SCAN解码器不会改变软输出,同时显著降低解码延迟并产生相同的纠错性能。

英文摘要:

Polar codes are able to achieve the capacity of memoryless channels under successive cancellation (SC) decoding. Soft Cancellation (SCAN) is a soft-output decoder based on the SC schedule, useful in iterative decoding and concatenation of polar codes. However, the sequential nature of this decoder leads to high decoding latency compared to state-of-the-art codes. To reduce the latency of SCAN, in this paper we identify special nodes in the decoding tree, corresponding to specific frozen-bit sequences, and propose dedicated low-latency decoding approaches for each of them. The resulting fast-SCAN decoder does not alter the soft-output compared to the standard SCAN while dramatically reducing the decoding latency and yielding the same error-correction performance.

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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