基于dft的SR-OFDM系统PAPR降低方案

IF 3.4 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Access Pub Date : 2025-04-24 DOI:10.1109/ACCESS.2025.3564160

Haojia Lv

{"title":"基于dft的SR-OFDM系统PAPR降低方案","authors":"Haojia Lv","doi":"10.1109/ACCESS.2025.3564160","DOIUrl":null,"url":null,"abstract":"This paper focuses on the peak-to-average power ratio (PAPR) reduction in symbol repetition-based orthogonal frequency division multiplexing (SR-OFDM) systems, and a discrete Fourier transform (DFT)-based scheme is proposed to reduce the PAPR of SR-OFDM signals. It is demonstrated that an SR-OFDM system exhibits a larger PAPR than a classical orthogonal frequency division multiplexing (OFDM) system because of the signal superposition of multiple branches, although the cyclic prefix (CP) overhead can be reduced in SR-OFDM systems. Besides, it is shown that the high PAPR is mainly because of the inverse DFT operation at the SR-OFDM transmitter. Therefore, a DFT-based scheme is proposed in this paper to compensate for the inverse DFT operation, without requiring side information or causing signal distortion. To verify the proposed scheme, a theoretical analysis is provided for the signal characteristics, and simulation results of the complementary cumulative distribution function are also given, together with the bit error ratio.","PeriodicalId":13079,"journal":{"name":"IEEE Access","volume":"13 ","pages":"72930-72937"},"PeriodicalIF":3.4000,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10975283","citationCount":"0","resultStr":"{\"title\":\"A DFT-Based Scheme for PAPR Reduction in SR-OFDM Systems\",\"authors\":\"Haojia Lv\",\"doi\":\"10.1109/ACCESS.2025.3564160\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper focuses on the peak-to-average power ratio (PAPR) reduction in symbol repetition-based orthogonal frequency division multiplexing (SR-OFDM) systems, and a discrete Fourier transform (DFT)-based scheme is proposed to reduce the PAPR of SR-OFDM signals. It is demonstrated that an SR-OFDM system exhibits a larger PAPR than a classical orthogonal frequency division multiplexing (OFDM) system because of the signal superposition of multiple branches, although the cyclic prefix (CP) overhead can be reduced in SR-OFDM systems. Besides, it is shown that the high PAPR is mainly because of the inverse DFT operation at the SR-OFDM transmitter. Therefore, a DFT-based scheme is proposed in this paper to compensate for the inverse DFT operation, without requiring side information or causing signal distortion. To verify the proposed scheme, a theoretical analysis is provided for the signal characteristics, and simulation results of the complementary cumulative distribution function are also given, together with the bit error ratio.\",\"PeriodicalId\":13079,\"journal\":{\"name\":\"IEEE Access\",\"volume\":\"13 \",\"pages\":\"72930-72937\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2025-04-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10975283\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Access\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10975283/\",\"RegionNum\":3,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"COMPUTER SCIENCE, INFORMATION SYSTEMS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Access","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10975283/","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"COMPUTER SCIENCE, INFORMATION SYSTEMS","Score":null,"Total":0}

引用次数: 0

摘要

针对基于符号重复的正交频分复用（SR-OFDM）系统中峰值平均功率比（PAPR）的降低问题，提出了一种基于离散傅立叶变换（DFT）的降低SR-OFDM信号峰值平均功率比的方法。研究表明，尽管SR-OFDM系统可以降低循环前缀（CP）开销，但由于多个分支的信号叠加，其PAPR比传统的正交频分复用（OFDM）系统要大。此外，研究表明，高PAPR主要是由于SR-OFDM发射机的逆DFT操作造成的。因此，本文提出了一种基于DFT的方案来补偿逆DFT运算，而不需要侧信息或引起信号失真。为了验证所提出的方案，对信号特性进行了理论分析，并给出了互补累积分布函数的仿真结果和误码率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

A DFT-Based Scheme for PAPR Reduction in SR-OFDM Systems

This paper focuses on the peak-to-average power ratio (PAPR) reduction in symbol repetition-based orthogonal frequency division multiplexing (SR-OFDM) systems, and a discrete Fourier transform (DFT)-based scheme is proposed to reduce the PAPR of SR-OFDM signals. It is demonstrated that an SR-OFDM system exhibits a larger PAPR than a classical orthogonal frequency division multiplexing (OFDM) system because of the signal superposition of multiple branches, although the cyclic prefix (CP) overhead can be reduced in SR-OFDM systems. Besides, it is shown that the high PAPR is mainly because of the inverse DFT operation at the SR-OFDM transmitter. Therefore, a DFT-based scheme is proposed in this paper to compensate for the inverse DFT operation, without requiring side information or causing signal distortion. To verify the proposed scheme, a theoretical analysis is provided for the signal characteristics, and simulation results of the complementary cumulative distribution function are also given, together with the bit error ratio.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

IEEE Access COMPUTER SCIENCE, INFORMATION SYSTEMSENGIN-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

9.80

自引率

7.70%

发文量

6673

审稿时长

6 weeks

期刊介绍： IEEE Access® is a multidisciplinary, open access (OA), applications-oriented, all-electronic archival journal that continuously presents the results of original research or development across all of IEEE''s fields of interest. IEEE Access will publish articles that are of high interest to readers, original, technically correct, and clearly presented. Supported by author publication charges (APC), its hallmarks are a rapid peer review and publication process with open access to all readers. Unlike IEEE''s traditional Transactions or Journals, reviews are "binary", in that reviewers will either Accept or Reject an article in the form it is submitted in order to achieve rapid turnaround. Especially encouraged are submissions on: Multidisciplinary topics, or applications-oriented articles and negative results that do not fit within the scope of IEEE''s traditional journals. Practical articles discussing new experiments or measurement techniques, interesting solutions to engineering. Development of new or improved fabrication or manufacturing techniques. Reviews or survey articles of new or evolving fields oriented to assist others in understanding the new area.