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arXiv 2201.00866cs.ITmath.IT
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多用户MAC的改进边界

Improved bounds for the many-user MAC

Suhas S Kowshik

摘要:

多用户MAC是理解5G及以后大规模随机接入能效的重要模型。Polyanskiy在2017年针对AWGN信道引入了该方法,随后的工作提供了在给定用户密度和有效载荷下实现目标每用户误差所需的渐近最小每比特能量的改进界限,超出了AWGN设置。最著名的严格界限使用空间耦合码以及最佳AMP算法。但是,这些界限是不可行的计算超过几个(约10)位的有效载荷。在本文中,我们提供了新的可扩展性界限的多用户AWGN和准静态瑞利衰落MAC使用空间耦合码本设计以及标量AMP算法。所获得的界限甚至可计算到100位,并且在此有效载荷处优于先前的界限。

英文摘要:

Many-user MAC is an important model for understanding energy efficiency of massive random access in 5G and beyond. Introduced in Polyanskiy'2017 for the AWGN channel, subsequent works have provided improved bounds on the asymptotic minimum energy-per-bit required to achieve a target per-user error at a given user density and payload, going beyond the AWGN setting. The best known rigorous bounds use spatially coupled codes along with the optimal AMP algorithm. But these bounds are infeasible to compute beyond a few (around 10) bits of payload. In this paper, we provide new achievability bounds for the many-user AWGN and quasi-static Rayleigh fading MACs using the spatially coupled codebook design along with a scalar AMP algorithm. The obtained bounds are computable even up to 100 bits and outperform the previous ones at this payload.

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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