计算机应用 ›› 2013, Vol. 33 ›› Issue (09): 2463-2466.DOI: 10.11772/j.issn.1001-9081.2013.09.2463

• 网络与通信 • 上一篇    下一篇

基于过采样的归一化累积量盲均衡算法

张晓琴1,2,3,胡永生1,3,4,张立毅1,2,3   

  1. 1. 天津大学 电子信息工程学院,天津 300072;
    2. 天津商业大学 信息工程学院,天津 300134;
    3. 天津大学 电子信息工程学院,天津 300072;
    4. 滨州学院 计算机科学技术系,山东 滨州 256603
  • 收稿日期:2013-03-14 修回日期:2013-04-28 出版日期:2013-09-01 发布日期:2013-10-18
  • 通讯作者: 张立毅
  • 作者简介:张晓琴(1973-),女,山西神池人,讲师,博士,主要研究方向:盲信号与信息处理;
    胡永生(1982-),男,山东菏泽人,讲师,博士研究生,主要研究方向:盲信号与信息处理;
    张立毅(1963-),男,山西忻州人,教授,博士生导师,博士,主要研究方向:信号检测、信息处理。

Normalized cumulant blind equalization algorithm based on oversampling technology

ZHANG Xiaoqin1,2,HU Yongsheng1,3,ZHANG Liyi1,2   

  1. 1. School of Electric Information Engineering, Tianjin University, Tianjin 300072, China;
    2. School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China;
    3. Department of Computer Science and Technology, Binzhou University, Binzhou Shandong 256603, China
  • Received:2013-03-14 Revised:2013-04-28 Online:2013-10-18 Published:2013-09-01
  • Contact: ZHANG Liyi

摘要: 传统的波特间隔均衡器只能补偿接收信号混叠的频率响应特性,并不能补偿信道畸变。针对这一问题提出一种基于过采样的归一化累积量算法,先对接收信号进行过采样,再利用变步长自适应调整均衡器的抽头系数,不仅能避免算法陷入局部最优,而且还能有效补偿信道畸变。仿真表明:引入过采样和变步长的盲均衡算法,有效地提高了收敛速度,降低了稳态剩余误差。

关键词: 盲均衡, 过采样技术, 归一化, 累积量

Abstract: The traditional baud spaced equalizer is used to compensate the aliasing frequency response characteristics of the received signal, but it cannot compensate the channel distortion. Concerning this problem, a normalized cumulant blind equalization algorithm based on oversampling technology was proposed. The received signal was oversampled firstly, and then the variable step-size was used to adaptively adjust weight coefficients of equalizer. It can not only avoid falling into local optimum, but also compensate the channel distortion effectively. The simulation results show that the algorithm can effectively speed up the convergence, and reduce the steady residual error.

Key words: blind equalization, oversampling technology, normalization, cumulant

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