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 (7): 968-971.DOI: -

• 论著 • 上一篇    下一篇

基于IEEE802.11a标准协议的MIMO-OFDM系统信道估计

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:2008-07-15 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(2005014019)

Channel estimation algorithm based on IEEE802.11a standard for MIMO-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:2008-07-15 Published:2013-06-22
  • Contact: Wang, H.
  • About author:-
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摘要： 针对基于IEEE802.11a标准协议的多输入多输出-正交频分复用(MIMO-OFDM)系统信道估计问题,提出了一种在时域中进行最小二乘(LS)信道估计的方案,该方案的基本思路是根据发送端与接收端的时域信号来计算发射天线与接收天线之间的时域信道响应.为了保证LS信道估计的均方误差(MSE)最小,还提出了一种最优导频序列设计方案.对比传统的导频设计方法,该方案只需要少量的训练块,且不随天线数目的增加而增加,发射天线的数目也没有限制.该导频设计方案要求导频序列中每个导频的能量不但相等,而且不同发射天线中的导频序列需要相互相移正交.仿真实验验证了此算法的有效性.

关键词: MIMO-OFDM, IEEE802.11a, 最优导频序列, 最小二乘信道估计, 快速傅立叶变换

Abstract: For the channel estimation of MIMO-OFDM (multiple-input multiple-output-orthogonal frequency division multiplexing) systems based on IEEE 802.11a standard, a least square (LS) channel estimation scheme is proposed in time domain. The idea of this scheme is mainly to estimate the time-domain channel responses between transmitting and receiving antennas in accordance to the time-domain signals between transmitting and receiving ends. To make sure that the mean square error (MSE) is minimum in the LS channel estimation, an optimal scheme of pilot sequence is put forward, which requires less training symbols than conventional schemes and the number of those symbols will not increase with the increasing number of antennas. Moreover, the number of transmitting antennas is unlimited. In the scheme proposed all the pilot tones are required to be equipowered and the phase shift should be mutually orthogonal among the pilot sequences of different transmitting antennas. Simulation results show the effectiveness of the scheme proposed.

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