Joint DFT Precoding and Discrete Wavelet Transform in SC-FDMA NOMA System with Carrier Frequency Offset Compensation

IF 1.2 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
M. Subha, D. Judson
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引用次数: 1

Abstract

Nonorthogonal multiple access (NOMA) is a promising multiple access (MA) technique for next-generation wireless systems with its capability to offer higher spectral efficiency, supporting massive network elements and low latency. Single-carrier frequency division multiple access (SC-FDMA) can be combined with NOMA systems to improve spectral efficiency and user capacity. This study proposes a transceiver structure for SC-FDMA based NOMA systems using discrete wavelet transform (DWT). The proposed transceiver structure employs joint discrete Fourier transform (DFT) precoding and DWT to obtain a higher bit error rate (BER) performance over conventional systems. The proposed scheme is referred to as a joint DFT precoded DWT SC-FDMA NOMA system that benefits through outstanding orthogonality and spectral containment characteristics of DWT, thereby improving the performance of the SC-FDMA NOMA system. Moreover, we have investigated the performance of the proposed system with variations in carrier frequency offset (CFO) to show the supremacy of the proposed SC‐FDMA NOMA System over multipath channels.
载波频偏补偿SC-FDMA NOMA系统的联合DFT预编码和离散小波变换
非正交多址(NOMA)是一种很有前途的多址(MA)技术,用于下一代无线系统,具有更高的频谱效率,支持大量网络元件和低延迟的能力。单载波频分多址(SC-FDMA)可以与NOMA系统相结合,提高频谱效率和用户容量。本研究提出一种基于离散小波变换(DWT)的SC-FDMA NOMA系统收发器结构。所提出的收发器结构采用离散傅立叶变换(DFT)预编码和DWT联合编码来获得比传统系统更高的误码率(BER)性能。本文提出的方案被称为DFT预编码DWT SC-FDMA NOMA联合系统,该系统得益于DWT出色的正交性和频谱遏制特性,从而提高了SC-FDMA NOMA系统的性能。此外,我们还研究了所提出系统在载波频偏(CFO)变化下的性能,以显示所提出的SC - FDMA NOMA系统在多径信道上的优势。
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
Periodico Di Mineralogia
Periodico Di Mineralogia 地学-地球化学与地球物理
CiteScore
1.50
自引率
14.30%
发文量
0
审稿时长
>12 weeks
期刊介绍: Periodico di Mineralogia is an international peer-reviewed Open Access journal publishing Research Articles, Letters and Reviews in Mineralogy, Crystallography, Geochemistry, Ore Deposits, Petrology, Volcanology and applied topics on Environment, Archaeometry and Cultural Heritage. The journal aims at encouraging scientists to publish their experimental and theoretical results in as much detail as possible. Accordingly, there is no restriction on article length. Additional data may be hosted on the web sites as Supplementary Information. The journal does not have article submission and processing charges. Colour is free of charges both on line and printed and no Open Access fees are requested. Short publication time is assured. Periodico di Mineralogia is property of Sapienza Università di Roma and is published, both online and printed, three times a year.
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