Selective channel inversion protocol for over-the-air computation

IF 4.2 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

ICT Express Pub Date : 2026-02-01 Epub Date: 2025-11-28 DOI:10.1016/j.icte.2025.11.016

Hyunwoo Jung , Jung-Bin Kim

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引用次数: 0

Abstract

This paper introduces a novel selective channel inversion (SCI) protocol for over-the-air computation (AirComp) networks. The proposed SCI protocol reduces the overhead associated with channel state information (CSI) by broadcasting a predefined channel threshold. Furthermore, it improves mean squared error (MSE) performance by permitting transmission only from sensor nodes with favorable channel conditions. For an arbitrary channel distribution, an exact closed-form expression for the MSE is derived, from which an asymptotic expression for a large number of sensor nodes is obtained. Numerical results demonstrate that the asymptotic expression closely matches the exact result, even for a relatively small number of sensor nodes. An optimization problem is formulated to determine the optimal channel threshold under Nakagami-

m

fading channels, and it is analytically proven that the problem is convex. An algorithm for dynamically determining the threshold under arbitrary channel distributions is also presented. Numerical results demonstrate that SCI AirComp outperforms CI AirComp in scenarios with low signal-to-noise ratio (SNR), high fading severity, and a large number of sensor nodes.

2018 The Korean Institute of Communications and Information Sciences. Publishing Services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

查看原文本刊更多论文

无线计算的选择信道反转协议

本文介绍了一种用于空中计算（AirComp）网络的选择性信道反演（SCI）协议。提出的SCI协议通过广播一个预定义的通道阈值来减少与通道状态信息（CSI）相关的开销。此外，它只允许从具有有利信道条件的传感器节点传输，从而提高了均方误差（MSE）性能。对于任意信道分布，导出了MSE的精确封闭表达式，并由此得到了大量传感器节点的渐近表达式。数值结果表明，即使对于相对较少的传感器节点，该渐近表达式也与精确结果非常接近。提出了在Nakagami-m衰落信道下确定最优信道阈值的优化问题，并解析证明了该问题的凸性。提出了在任意信道分布下动态确定阈值的算法。数值结果表明，SCI AirComp在低信噪比（SNR）、高衰落严重程度和大量传感器节点场景下优于CI AirComp。2018韩国通信与信息科学研究所。这是一篇基于CC by-nc-nd许可（http://creativecommons.org/licenses/by-nc-nd/4.0/）的开放获取文章。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ICT Express Multiple-

CiteScore

10.20

自引率

1.90%

发文量

167

审稿时长

35 weeks

期刊介绍： The ICT Express journal published by the Korean Institute of Communications and Information Sciences (KICS) is an international, peer-reviewed research publication covering all aspects of information and communication technology. The journal aims to publish research that helps advance the theoretical and practical understanding of ICT convergence, platform technologies, communication networks, and device technologies. The technology advancement in information and communication technology (ICT) sector enables portable devices to be always connected while supporting high data rate, resulting in the recent popularity of smartphones that have a considerable impact in economic and social development.