• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical fiber technology >Radio-over-Fiber signal demodulation in the presence of non-Gaussian distortions based on subregion constellation processing
【24h】

Radio-over-Fiber signal demodulation in the presence of non-Gaussian distortions based on subregion constellation processing

机译：基于子区域星座图处理的非高斯失真情况下的光纤无线电信号解调

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Subregion constellation processing as a demodulation method improves noise tolerance and system error performance when the optical channel presents non-Gaussian distortions, common in optical-wireless communications systems. The proposed method consists of: first, grouping in clusters data symbols closely located -in the sense of Euclidian distances- on the 2D constellation diagram, for then tracing boundaries between clusters following the rules of Voronoi diagrams. The Voronoi contours define subregions on the constellation diagram, and each one of these subregions contains a cluster of data symbols. The proposed method allows both the definition of demapping rules based on identified Voronoi contours in the process of demodulation, as well as the characterization of transmission impairments on each cluster of data symbols by analyzing the 2D mean value of the cluster and its geometrical shaping. Subregion constellation processing is demonstrated and experimentally validated in a single-channel Radio-over-Fiber (RoF) system with a direct-detection (DD) receiver, with information propagated over an optical fiber link with length 78.8 km at a bit rate of 1 Gb/s. The fact of applying Voronoi contours and subregion constellation processing as a rule for demapping improves the noise tolerance in 3.1 dB for 16-QAM, and 1.4 dB for 4 + 12 PSK when compared to the standard grid for the studied modulation formats, for a bit error rate (BER) threshold of 1 x 10(-2). A non-Gaussian behavior was observed on the recovered constellation diagram, creating asymmetric data-symbols distribution (irregular ellipsoidal shape on external symbols) on the IQ plane.
机译：当光信道呈现非高斯失真时，作为解调方法的子区域星座处理可提高噪声容忍度和系统错误性能，这在光无线通信系统中很常见。所提出的方法包括：首先，将在二维星座图上紧密定位的数据符号（在欧几里得距离的意义上）分组，然后按照Voronoi图的规则跟踪群集之间的边界。 Voronoi等高线定义了星座图上的子区域，这些子区域中的每个子区域都包含一组数据符号。所提出的方法既可以在解调过程中基于已识别的Voronoi轮廓定义解映射规则，又可以通过分析群集的2D平均值及其几何形状来表征每个数据符号群集上的传输损伤。在具有直接检测（DD）接收器的单通道光纤无线电（RoF）系统中演示并通过实验验证了子区域星座处理，并且该信息以1位的比特率在长度为78.8 km的光纤链路上传播Gb /秒与研究的调制格式的标准网格相比，采用Voronoi轮廓和子区域星座图处理作为解映射的事实，与标准网格相比，将16-QAM的噪声容忍度提高了3.1 dB，将4 + 12 PSK的噪声容忍度提高了1.4 dB错误率（BER）阈值为1 x 10（-2）。在恢复的星座图上观察到非高斯行为，从而在IQ平面上创建了不对称的数据符号分布（外部符号上的椭圆形不规则形状）。

著录项

  • 来源
    《Optical fiber technology》 |2019年第12期|102062.1-102062.10|共10页
  • 作者

  • 作者单位

    Univ Antioquia Fac Ingn Cl 67 53-108 Medellin Colombia|Univ Pedagog & Tecnol Colombia Escuela Ingn Elect Calle 4 15-134 Sogamoso Colombia;

    Univ Pedagog & Tecnol Colombia Escuela Ingn Elect Calle 4 15-134 Sogamoso Colombia;

    Univ Nacl Colombia Fac Ingn Carrera Carrera 27 64-60 Manizales Colombia;

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

    Clustering; Gustafson-Kessel; k-means; Fuzzy c-means; Voronoi; Radio-over-Fiber; Constellation;

    机译：集群;Gustafson-Kessel;k均值模糊c均值;Voronoi;光纤无线电;星座;

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