通信学报 ›› 2006, Vol. 27 ›› Issue (5): 28-34.doi: 1000-436X(2006)05-0028-07

• 学术论文 • 上一篇    下一篇

OFDM系统中基于分组导频的迭代信道估计算法

蒋琦,赵春明,王家恒   

  1. 1. 东南大学 移动通信国家重点实验室,江苏 南京 210096
  • 出版日期:2006-05-25 发布日期:2017-07-04
  • 基金资助:
    国家自然科学基金资助项目

Iterative channel estimation based on block-type pilot-assisted for OFDM systems

Qi JIANG,Chun-ming ZHAO,Jia-heng WANG   

  1. National Mobile Communications Research Lab, Southeast University, Nanjing 210096, China
  • Online:2006-05-25 Published:2017-07-04
  • Supported by:
    The National Natural Science Foundation of China

摘要:

对OFDM系统中由于信道的时变性产生的载波间干扰进行了分析,并在此基础上提出了一种分组导频结构的DFT迭代信道估计算法。与原有的信道估计算法相比,此种算法不仅在一般的信道条件下具有良好的性能,而且更加适合快变信道条件下的OFDM系统。仿真结果表明:提出的OFDM信道估计算法不仅可以给出精度较高的信道信息,而且近似达到理想信道估计的性能。

关键词: 载波间干扰, 快变信道, 迭代信道估计, 理想信道估计

Abstract:

The inter-carrier interference caused by time-variant fading channels in OFDM systems was analyzed and a novel block-type pilot-assisted iterative channel estimation algorithm based on DFT was proposed. The proposed algo-rithm, compared with the conventional algorithms, could provide more accurate channel information not only in slowly time-variant environments, but more important also in fast time-variant environments. The simulation results show that the proposed algorithm can nearly achieve the performance as good as the perfect channel estimation in both slowly and fast time-variant fading channels.

Key words: inter-carrier interference, fast time variant channel, iterative channel estimation, perfect channel estimation

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