...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Optical Communications >New Hybrid PAPR Reduction Techniques for OFDM-Based Visible Light Communication Systems
【24h】

New Hybrid PAPR Reduction Techniques for OFDM-Based Visible Light Communication Systems

机译：基于OFDM的可见光通信系统的新型混合PAPR降低技术

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Orthogonal frequency division multiplexing (OFDM) is used with visible light communication (VLC) systems to reduce the effects of inter-symbol interference (ISI) and to achieve communication with high speed of data transmission and huge bandwidth. However, OFDM-based VLC systems suffer from high peak-to-average power ratios (PAPRs). This paper proposes a new hybrid PAPR reduction technique based on signal transformation combined with clipping. The Hadamard transform is used in the proposed technique due to its advantages in reducing the PAPR without affecting the bit error rate (BER) of VLC systems. The optimum clipping threshold at which we can simultaneously reduce the PAPR and improve the BER of VLC systems is also determined. In this paper, we also propose a new OFDM structure based on using discrete cosine transform (DCT) precoding before inverse fast Fourier transform (IFFT) stage to further improve the PAPR reduction capability and BER performance. Several experiments are carried out to test the performance of the proposed technique in terms of complementary cumulative distribution function (CCDF) and the BER. The obtained results show that the proposed technique can simultaneously reduce the PAPR and achieve good BER performance when compared to the original OFDM-based VLC system.
机译：正交频分复用（OFDM）与可见光通信（VLC）系统一起使用，以减少符号间干扰（ISI）的影响，并实现高速数据传输和巨大带宽的通信。但是，基于OFDM的VLC系统存在较高的峰均功率比（PAPR）。本文提出了一种新的基于信号变换和削波的混合PAPR降低技术。提出的技术中使用Hadamard变换，是因为其具有在不影响VLC系统的误码率（BER）的情况下降低PAPR的优势。还确定了可以同时降低PAPR和提高VLC系统的BER的最佳限幅阈值。在本文中，我们还提出了一种新的OFDM结构，该结构基于在快速傅里叶逆变换（IFFT）阶段之前使用离散余弦变换（DCT）预编码来进一步提高PAPR降低能力和BER性能。根据互补累积分布函数（CCDF）和BER，进行了一些实验来测试所提出技术的性能。所得结果表明，与原始的基于OFDM的VLC系统相比，该技术可以同时降低PAPR并获得良好的BER性能。

著录项

  • 来源
    《Journal of Optical Communications》 |2018年第4期|427-435|共9页
  • 作者

    Haitham Freag; Emad S. Hassan; Sami A. El-Dolil; Moawad I. Dessouky;

  • 作者单位

    Department of Electronics and Electrical Communications, High Institute of Engineering and Technology, Kafrelsheikh, Egypt;

    Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt;

    Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt;

    Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, 32952, Menouf, Egypt;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    OFDM; VLC systems; PAPR reduction; Hadamard transform; clipping method;

    机译：OFDM;VLC系统;降低PAPR;哈达玛变换剪裁方法;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号