Reduction of peak-to-average power ratio for FBMC/OQAM signals under the general linear non-symmetrical companding transform with a Laplace distribution

IF 4.1 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

ICT Express Pub Date : 2024-12-01 DOI:10.1016/j.icte.2024.05.009

Xinyu Liu , Hongkun Zhou , Xiyun Ge , Miao Yu , Lei Liu

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引用次数: 0

Abstract

The filter bank multi-carrier with offset quadrature amplitude modulation (FBMC/OQAM) is extensively utilized in communication scenarios characterized by severe Doppler interference, owing its remarkable ability for precise time–frequency positioning concentration. However, the distinctive staggered superposition structure leads to an additional increase in peak-to-average power ratio (PAPR). In this letter, we discover that the unique superposition structure results in a high likelihood of abnormal minima in FBMC/OQAM, consequently diminishing the efficacy of the general companding transform scheme relying on Gaussian distribution for PAPR reduction. Thus, we introduce a general companding transform scheme based on the Laplace distribution. The simulation results demonstrate that the proposed scheme offers a 3 dB advantage in PAPR reduction compared to the traditional general companding scheme, while also maintaining a nearly 1 dB advantage in BER.

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在拉普拉斯分布的一般线性非对称压缩变换下降低 FBMC/OQAM 信号的峰均功率比

多载波偏置正交调幅滤波器组（FBMC/OQAM）以其卓越的时频定位集中能力，广泛应用于多普勒干扰严重的通信场景中。然而，独特的交错叠加结构导致峰值-平均功率比（PAPR）的额外增加。在这篇文章中，我们发现独特的叠加结构导致FBMC/OQAM中异常极小值的可能性很高，从而降低了依赖高斯分布的一般压缩变换方案的PAPR降低效果。因此，我们引入了一种基于拉普拉斯分布的广义扩展变换格式。仿真结果表明，与传统的一般扩宽方案相比，该方案在减少PAPR方面具有3 dB的优势，同时在BER方面也保持了近1 dB的优势。

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.