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基于Kolmogorov熵的低压电力线信道特性分析


□ 王振朝 张士兵 侯惠然 甘玉涛

   (1. 河北大学 电子信息工程学院, 河北 保定071002; 2.中电飞华通信有限公司, 北京 100029)
  
  摘 要:
  将Kolmogorov熵引入低压电力线信道特性的研究。通过计算不同条件下测得的电力线时间序列的Kolmogorov熵值,分析研究信道的混沌特征。主要结果有Kolmogorov熵值与电力网络的运行工况(地点、时间、负荷)呈正相关性,恒大于零,且趋于某一饱和值;同时,Kolmogorov熵受数据测量电路的通频带、采样间隔等参数影响。据此可推得如下结论:低压电力线信道具有混沌特征,短时可预测;Kolmogorov熵可作为描述低压电力线信道模型、估计信道特性的参数之一。
  关键词:低压电力线通信; 信道特性; 混沌; Kolmogorov熵
  中图分类号: TN913文献标志码:A
  文章编号:10013695(2009)04122505
  
  Analysis of lowvoltage PLC channel characteristic based on Kolmogorov entropy
  WANG Zhenchao1, ZHANG Shibing1, HOU Huiran2, GAN Yutao1
   (1.College of Electronic & Information Engineering, Hebei University, Baoding Hebei 071002, China; 2.Fibrlink Communication Co., Ltd, Beijing 100029, China)
  
  Abstract:
  This paper introduced the Kolmogorov entropy theory to study the characteristics of lowvoltage power line communication (LPLC) channel, computed the Kolmogorov entropy of time series measured from the LPLC channel under different conditions and the main results were as follows: the value of Kolmogorov entropy was positively correlated with the running condition of power system and was positive when the embedding dimension was big enough. And the value tends to be saturated with the increase of embedding dimension. At the meantime, the Kolmogorov entropy is greatly affected by the transmission bands and sampling interval of data measurement circuits. Accordingly, the following conclusions are drawn: the LPLC channel is a chaotic system and can be predicted for a short time interval. The Kolmogorov entropy can be employed as one of the parameters to describe the model of LPLC channel and estimate the characteristics of the channel. ......
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