J4 ›› 2012, Vol. 39 ›› Issue (3): 131-135.doi: 10.3969/j.issn.1001-2400.2012.03.021

• 研究论文 • 上一篇    下一篇



  1. (北京邮电大学 宽带通信网络实验室,北京  100876)
  • 收稿日期:2011-04-14 出版日期:2012-06-20 发布日期:2012-07-03
  • 通讯作者: 张钦娟
  • 作者简介:张钦娟(1986-),女,北京邮电大学博士研究生,E-mail: zhangqinjuan@bupt.edu.cn.
  • 基金资助:


Optimized generalized complex exponential basis expansion in the OFDM system

ZHANG Qinjuan;WU Muqing;GUO Qilin;ZHANG Rui   

  1. (Broadband Communication Network Lab., Beijing Univ. of Posts and Telecommunications, Beijing  100876, China)
  • Received:2011-04-14 Online:2012-06-20 Published:2012-07-03
  • Contact: ZHANG Qinjuan



关键词: 正交频分复用, 信道估计, 时间选择性信道, 基扩展模型


In wireless communication systems, high-speed mobile terminals induce the channel to be time selective. In this paper, the generalized complex exponential basis expansion model (GCE-BEM) is optimized for the time selective channel of the orthogonal frequency division multiplexing system. The proposed model can adapt the model coefficient according to the Doppler frequency estimation situation, becoming the GCE-BEM with a fixed or varying coefficient. It can effectively eliminate high-frequency noise without increasing the computational complexity, reduce the model error, and improve the system performance.

Key words: OFDM, channel estimation, time selective channel, basis expansion model