J4 ›› 2015, Vol. 42 ›› Issue (5): 139-146.doi: 10.3969/j.issn.1001-2400.2015.05.024

• 研究论文 • 上一篇    下一篇



  1. (盲信号处理重点实验室, 四川 成都  610041)
  • 收稿日期:2014-05-20 出版日期:2015-10-20 发布日期:2015-12-03
  • 通讯作者: 乔良
  • 作者简介:乔良(1984-),男,盲信号处理重点实验室博士研究生,E-mail: lqiao57s@163.com.
  • 基金资助:


Iterative equalization combining algorithm in intersymbol interference channel

QIAO Liang;ZHENG Hui   

  1. (National Key Lab. of Science and Technology on Blind Signal Processing, Chengdu  610041, China)
  • Received:2014-05-20 Online:2015-10-20 Published:2015-12-03
  • Contact: QIAO Liang



关键词: 空间分集, Turbo均衡, 符号间干扰, 外信息传递图


To realize joint optimization of spatial diversity and equalization combining in the intersymbol interference (ISI) channel, an iterative equalization combining algorithm is proposed. The proposed algorithm uses the coefficients of Turbo equalization to calculate the combination weights without estimating the signal to noise ratio in each diversity branch. The equalized symbols from different diversity branches are combined, and the extrinsic information output from the decoder is fed back to the equalizers, so as to exchange soft information between the equalizers and the decoder. The performance of the proposed algorithm is analyzed using the extrinsic information transfer (EXIT) chart and verified by simulations. Results show that our approach fully exploits time domain information from the multipath channel and spatial domain information from multi receiving antennas, which efficiently improve the performance of the receiver in the severe ISI channel.

Key words: spatial diversity, Turbo equalization, intersymbol interference, extrinsic information transfer(EXIT) chart


  • TN911.5