东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (5): 673-676.DOI: -

• 论著 • 上一篇    下一篇

OFDM系统LS信道估计中的最优导频设计

王晗;汪晋宽;   

  1. 东北大学信息科学与工程学院;东北大学信息科学与工程学院 辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-05-15 发布日期:2013-06-22
  • 通讯作者: Wang, H.
  • 作者简介:-
  • 基金资助:
    教育部高等学校博士学科点专项科研基金资助项目(20050145019)

Optimal pilot design in LS channel estimation for OFDM systems

Wang, Han (1); Wang, Jin-Kuan (1)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-05-15 Published:2013-06-22
  • Contact: Wang, H.
  • About author:-
  • Supported by:
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摘要： 针对设置有保护频带的OFDM系统,基于等间隔导频(UPPTS)设计方法,在保证最小二乘(LS)信道估计均方误差(MSE)最小的前提下,计算了系统允许存在的最大保护频带宽度,给出了初始导频位置的选择范围,通过调整导频序列的初始位置,使导频序列有效避开保护频带.仿真实验结果表明,当导频序列的初始导频落入本文所给出的导频位置选择范围之内时,系统给出了更高的信道估计精度和更低的误码率,进一步验证了算法的有效性和优越性.

关键词: LS信道估计, OFDM, 最优导频, 虚拟子载波, 保护频带

Abstract: For the OFDM(orthogonal frequency division multiplexing) systems with guard band, the permissible biggest guard bandwidth is computed on the bases of the conventional UPPTS (uniformly placed pilot tones sequence) design and the premise that the MSE(mean square error) of the LS(least square) channel estimation must be minimum. Thus, the choosing range is given for the initial position of pilot tones sequence to enable the sequence to avoid guard band efficiently by way of adjusting the initial position. Simulation results showed that the system can give higher precision of channel estimation and lower BER(bit error rate) when the initial pilot tone falls into the choosing range mentioned above. The effectiveness and advantages of the presented algorithm are thus verified further.

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