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一种改进的OFDM系统盲信道估计算法 被引量:1

An Improved Blind OFDM Channel Estination Algorithm
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摘要 在OFDM通信系统中,信道参数估计一直是个备受关注的问题。本文利用接收端分集,提出了一种改进的盲信道估计算法,它适用于有无虚拟子载波,有无循环前缀的各种情况,在一定的信道精度要求条件下,可以在一个OFDM 符号内进行信道估计。计算机仿真显示,在积累相同的接收符号时,本算法也比同类的盲信道估计算法的性能好。 Channel estimation is very important problem that has been paid muehu attention in OFDM communication system. In this paper, a improved blind OFDM channel estimation algorithm is proposed using receiver diversity. It suits for all OFDM signal structure whether the virtue subcarriers and CP are present or not, and can be used to recover the channel response within only a single OFDM block under some condition. The computer simulation results show that the algorithm is efficient in computation and performance compared with most existing blind algorithms.
出处 《信号处理》 CSCD 北大核心 2006年第1期123-126,共4页 Journal of Signal Processing
基金 受国家自然科学基金(60172028)高等学校博士学科点专项基金(20010701008)联合资助
关键词 正变频分复用(OFDM) 盲信道估计 子空间方法 接收分集 OFDM Blind channel estimation Subspace method Receiver diversity
作者简介 张瑞齐(1979-),男,河北省沧州人,2002年获得山东大学通信专业学士学位,现为雷达信号处理重点实验室硕士研究生,感兴趣的方向为通信信号处理。
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参考文献4

  • 1Chengyang Li and Sumit Roy,“Subspace-based blind channel estimation ibr OFDM by exploiting virtual carriers,”IEEE Trans. Wireless Communication, Vol. 2, No. 1, January 2003.
  • 2Hassan Ali,Jonathan H. Maroon and Yingbo Hua,“A SOS subspace method for blind channel identification and equalization in bandwidth efficient OFDM systems based on receive antenna diversity,”in Proc. 11th . IEEE Signal Processing Workshop Statistical Signal Processing, Singapore Aug2001 pp. 401 - 404.
  • 3Huang Xuejun, Bi Houjie and Yu Songyu,“A new subspace algorithm of blind channel estimation for OFDM systems,”The 14^th IEEE 2003 International Symposium on Personal, Mobile Communication Proceeding.
  • 4Ouyang Xi,Tan Feng and Ge LinDong,“A blind joint estimation algorithm for ehannel and frequency offset in OFDM system,”The 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Communication Proceeding.

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