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arXiv 2303.07461cs.ITmath.IT
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利用信道相关性改进译码——ORBGRAND-AI

Using channel correlation to improve decoding -- ORBGRAND-AI

Ken R. Duffy, Moritz Grundei, Muriel Medard

AI总结:

本文提出ORBGRAND-AI软检测译码器,通过利用信道相关性替代交织,在降低时延和译码复杂度的同时提升多个dB的纠错性能,为URLLC提供解决方案。

摘要:

为满足现代应用的超可靠低时延通信(URLLC)需求,短纠错码及相应软检测译码器的发展取得了显著进展。然而,实现低时延的一个重大障碍是依赖交织来打破普遍存在的信道相关性,以确保译码器输入符合译码器假设。因此,即使使用短码,也需要在发送端等待交织数据并在接收端进行解交织,这导致显著时延,与URLLC的目标相悖。此外,交织会降低信道容量,从而可能降低译码性能。本文引入有序可靠性比特猜测随机加性噪声译码(ORBGRAND)的一种变体,称为ORBGRAND-近似独立(ORBGRAND-AI),这是一种软检测译码器,可以译码任何中等冗余度的码,并通过利用信道相关性、避免交织需求来克服现有译码范式的局限性。通过利用相关性,不仅降低了时延,而且纠错性能可提升多个dB,同时译码复杂度也得以降低,为提供URLLC提供了一种潜在解决方案。

英文摘要:

To meet the Ultra Reliable Low Latency Communication (URLLC) needs of modern applications, there have been significant advances in the development of short error correction codes and corresponding soft detection decoders. A substantial hindrance to delivering low-latency is, however, the reliance on interleaving to break up omnipresent channel correlations to ensure that decoder input matches decoder assumptions. Consequently, even when using short codes, the need to wait to interleave data at the sender and de-interleave at the receiver results in significant latency that acts contrary to the goals of URLLC. Moreover, interleaving reduces channel capacity, so that potential decoding performance is degraded. Here we introduce a variant of Ordered Reliability Bits Guessing Random Additive Noise Decoding (ORBGRAND), which we call ORBGRAND-Approximate Independence (ORBGRAND-AI), a soft-detection decoder that can decode any moderate redundancy code and overcomes the limitation of existing decoding paradigms by leveraging channel correlations and circumventing the need for interleaving. By leveraging correlation, not only is latency reduced, but error correction performance can be enhanced by multiple dB, while decoding complexity is also reduced, offering one potential solution for the provision of URLLC.

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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