Analysis of integrated IDFT and Zadoff–Chu matrix precoding processes in OFDM systems

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

ICT Express Pub Date : 2025-02-26 DOI:10.1016/j.icte.2025.02.005

Kouji Ohuchi

引用次数: 0

Abstract

Peak signal reduction is a critical problem in orthogonal frequency-division multiplexing (OFDM) systems. Herein, we focus on Zadoff–Chu matrix (ZCM) precoding as a peak signal reduction method and analyze its integration using the discrete Fourier transform process. The analysis reveals that the integrated process can be substituted by a sparse matrix multiplication and the influence of ZCM parameters on the sparse matrix is mathematically clarified. The results also show that the ZCM precoding works to produce a single-carrier signal and explains how the ZCM precoding reduces the peak of the OFDM signal.

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OFDM系统中集成IDFT和Zadoff-Chu矩阵预编码过程分析

峰值信号降低是正交频分复用（OFDM）系统中的一个关键问题。本文重点研究了Zadoff-Chu矩阵（ZCM）预编码作为一种峰值信号降低方法，并利用离散傅里叶变换过程分析了其积分。分析表明，积分过程可以用稀疏矩阵乘法代替，并从数学上阐明了ZCM参数对稀疏矩阵的影响。结果还表明，ZCM预编码可以产生单载波信号，并解释了ZCM预编码如何降低OFDM信号的峰值。

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.