中国邮电高校学报(英文) ›› 2011, Vol. 18 ›› Issue (4): 20-24.doi: 10.1016/S1005-8885(10)60078-7

• Wireless • 上一篇    下一篇

Orthogonal procrustes based semi-blind MIMO channel estimation under space-time block code transmissions

胡峰1,金立标1,李鉴增2,2   

  1. 1. 中国传媒大学
    2.
  • 收稿日期:2010-12-15 修回日期:2011-04-11 出版日期:2011-08-31 发布日期:2011-08-24
  • 通讯作者: 胡峰 E-mail:hufeng_198@163.com
  • 基金资助:

    The work was supported by the Scientific Research Foundation for the Digital Multimedia Broadcasting Science, the State Administration of Radio Film and Television (2005-12).

Orthogonal procrustes based semi-blind MIMO channel estimation under space-time block code transmissions

  • Received:2010-12-15 Revised:2011-04-11 Online:2011-08-31 Published:2011-08-24
  • Contact: Feng Hu E-mail:hufeng_198@163.com
  • Supported by:

    The work was supported by the Scientific Research Foundation for the Digital Multimedia Broadcasting Science, the State Administration of Radio Film and Television (2005-12).

摘要:

This work investigates a novel semi-blind channel estimation for multiple-input multiple-output (MIMO) space-time block coding (STBC) systems. Algorithms for channel estimation based on whitening-rotation (WR) decomposition that provides a combined quality and spatial scalability is utilized. Using a space-time code-constrained input design, our approach exploits the orthogonality of the signal and noise subspaces in conjunction with orthogonal procrustes (OP) technique to obtain an accurate estimate of the unitary rotation matrix and, consequently, of the channel parameters. Unitary rotation matrices are parameterized a much fewer number of parameters, and signi?cant estimation gains can then be achieved by estimation of such orthogonal matrices. Furthermore, the proposed semi-blind MIMO channel estimation approach is conducted to reduce the complexity of system design when the number of the receive antennas is no less than the number of transmit antennas. Computer simulations are conducted to corroborate the effectiveness of the proposed channel estimation, and they demonstrate the improved performance compared to the existing training-based estimation.

关键词:

MIMO, semi-blind channel estimation, STBC, orthogonal procrustes, singular value decomposition

Abstract:

This work investigates a novel semi-blind channel estimation for multiple-input multiple-output (MIMO) space-time block coding (STBC) systems. Algorithms for channel estimation based on whitening-rotation (WR) decomposition that provides a combined quality and spatial scalability is utilized. Using a space-time code-constrained input design, our approach exploits the orthogonality of the signal and noise subspaces in conjunction with orthogonal procrustes (OP) technique to obtain an accurate estimate of the unitary rotation matrix and, consequently, of the channel parameters. Unitary rotation matrices are parameterized a much fewer number of parameters, and signi?cant estimation gains can then be achieved by estimation of such orthogonal matrices. Furthermore, the proposed semi-blind MIMO channel estimation approach is conducted to reduce the complexity of system design when the number of the receive antennas is no less than the number of transmit antennas. Computer simulations are conducted to corroborate the effectiveness of the proposed channel estimation, and they demonstrate the improved performance compared to the existing training-based estimation.

Key words:

MIMO, semi-blind channel estimation, STBC, orthogonal procrustes, singular value decomposition

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