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arXiv 1909.04892cs.ITmath.IT
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极化码简化逐次相消译码的次线性延迟

Sublinear Latency for Simplified Successive Cancellation Decoding of Polar Codes

Marco Mondelli, Seyyed Ali Hashemi, John Cioffi, Andrea Goldsmith

摘要:

这项工作分析了Alamdar-Yazdi和Kschischang提出的极化码简化连续抵消(SSC)解码方案的延迟。它示出,不同于传统的连续消除解码,其中延迟是线性的块长度,SSC解码的延迟是次线性的。更具体地,SSC解码的延迟是$O(N^{1-1/μ})$,其中$N$是块长度,而$μ$是信道的标度指数,其捕获速率对容量的收敛速度。数值结果表明的约束的紧密性,并表明,大部分的延迟减少来自并行解码的速率$0$或$1$的子码。

英文摘要:

This work analyzes the latency of the simplified successive cancellation (SSC) decoding scheme for polar codes proposed by Alamdar-Yazdi and Kschischang. It is shown that, unlike conventional successive cancellation decoding, where latency is linear in the block length, the latency of SSC decoding is sublinear. More specifically, the latency of SSC decoding is $O(N^{1-1/μ})$, where $N$ is the block length and $μ$ is the scaling exponent of the channel, which captures the speed of convergence of the rate to capacity. Numerical results demonstrate the tightness of the bound and show that most of the latency reduction arises from the parallel decoding of subcodes of rate $0$ or $1$.

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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