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电网技术 ›› 2007, Vol. 31 ›› Issue (22): 85-89 .doi:

• 论文 • 上一篇    

电力线通信中信道估计和模糊滤波技术研究

赵庆杞,杨东升,张化光,孟子怡   

  1. 东北大学信息科学与工程学院,辽宁省沈阳市 110004
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-11-20 发布日期:2007-11-20


Research on Channel Estimation and Fuzzy Filtering Technique Applied in
Power Line Communication

ZHAO Qing-qi,YANG Dong-sheng,ZHANG Hua-guang,MENG Zi-yi   

  1. School of Information Science and Engineering,Northeastern University,Shenyang 110004,Liaoning Province,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-11-20 Published:2007-11-20

摘要:

信道估计是正交频分复用(orthogonal frequency division multiplexing,OFDM) 技术中数据解调与均衡的基础。文章在分析电力线信道特性的基础上,针对电力线信道的非线性畸变对数据传输准确率的影响,提出采用基于模糊模型的滤波器来估计信道模型。仿真结果表明,所设计的H∞ 滤波器与OFDM 通信技术相结合能够有效消除或降低电力线信道中存在的噪声干扰、码间干扰和信道间干扰。

关键词: 信道估计, 模糊模型, 电力线, 码间干扰

Abstract:

Channel estimation is the basis of data demodulation and equalization in Orthogonal Frequency Division Multiplexing (OFDM) technology. In this paper, on the basis of analyzing the channel characteristics of power line communication and according to the impact of nonlinear distortion of power line channel on data transmission accuracy, it is proposed to estimate channel model by the filter based on fuzzy model. Simulation results show that the integration of the designed H∞ filter with OFDM technology can effectively eliminate or lower the noise interference, inter-symbol interference and inter-channel interference existing in power line channels.

Key words: channel estimation, fuzzy model, electric power line, inter-symbol interference

中图分类号: 

  • TM734
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