{"title":"BER performance analysis for downlink NOMA systems over cascaded Nakagami-m fading channels","authors":"Arif Basgumus, Fatih Kocak, Mustafa Namdar","doi":"10.1007/s12243-023-01002-4","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, the downlink non-orthogonal multiple access (NOMA) system in which successive interference cancellation (SIC) errors exist is discussed. The new closed-form expressions for the bit error rate (BER) performance analysis over cascaded Nakagami-<i>m</i> fading channels are analytically derived for near and far users. In addition, new mathematical equations are obtained for the asymptotic BER as well as the diversity order to analyze the system performance. The theoretical results precisely match the simulations in all cases, validating the effectiveness of the theoretical analysis. The results demonstrate that the system performance decreases as the degree of <i>N</i> cascading increases. As for a fixed degree of cascading, BER performance increases as the <i>m</i> parameter increases. Moreover, for the power allocation coefficient <span>\\(\\alpha \\)</span> influences the SIC operation performed on the near user, it also substantially affects the BER performance. Monte Carlo simulations using <span>\\(10^{6}\\)</span> iterations are presented to validate the derived analytical results.</p></div>","PeriodicalId":50761,"journal":{"name":"Annals of Telecommunications","volume":"79 5-6","pages":"447 - 453"},"PeriodicalIF":1.8000,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Telecommunications","FirstCategoryId":"94","ListUrlMain":"https://link.springer.com/article/10.1007/s12243-023-01002-4","RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"TELECOMMUNICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, the downlink non-orthogonal multiple access (NOMA) system in which successive interference cancellation (SIC) errors exist is discussed. The new closed-form expressions for the bit error rate (BER) performance analysis over cascaded Nakagami-m fading channels are analytically derived for near and far users. In addition, new mathematical equations are obtained for the asymptotic BER as well as the diversity order to analyze the system performance. The theoretical results precisely match the simulations in all cases, validating the effectiveness of the theoretical analysis. The results demonstrate that the system performance decreases as the degree of N cascading increases. As for a fixed degree of cascading, BER performance increases as the m parameter increases. Moreover, for the power allocation coefficient \(\alpha \) influences the SIC operation performed on the near user, it also substantially affects the BER performance. Monte Carlo simulations using \(10^{6}\) iterations are presented to validate the derived analytical results.
期刊介绍：
Annals of Telecommunications is an international journal publishing original peer-reviewed papers in the field of telecommunications. It covers all the essential branches of modern telecommunications, ranging from digital communications to communication networks and the internet, to software, protocols and services, uses and economics. This large spectrum of topics accounts for the rapid convergence through telecommunications of the underlying technologies in computers, communications, content management towards the emergence of the information and knowledge society. As a consequence, the Journal provides a medium for exchanging research results and technological achievements accomplished by the European and international scientific community from academia and industry.
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