基于非冗余线性预编码的MIMO OFDM系统联合盲信道估计

S. Ghadrdan, S. Salari, M. Ahmadian
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引用次数: 2

摘要

研究了多输入多输出(MIMO)正交频分复用(OFDM)系统中信道盲估计问题,假设传输信号是独立且同分布的。特别地,利用广义线性无冗余预编码器,开发了一种简单的MIMO-OFDM系统盲信道估计技术。一个新颖的贡献是,该估计器不像以往的工作那样只使用信号协方差矩阵的一列,而是联合考虑信号协方差矩阵中包含的所有信息。比较表明,该方法优于现有的估计方法。我们还注意到,该算法的计算效率大大提高。因此,该方法是MIMO-OFDM系统中一种很有前途的盲信道估计方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Joint blind channel estimation for MIMO OFDM systems via nonredundant linear precoding
The problem of blind channel estimation in Multiple-Input-Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems is investigated in this study, assuming that the transmitted symbols are independent and identically distributed. In particular, by utilizing a generalized linear non-redundant precoder, a simple blind channel estimation technique for MIMO-OFDM systems is developed. A novel contribution is that instead of using only one column of the signal covariance matrix, as done in previous works, proposed estimator jointly considers all the information contained in the signal covariance matrix. Comparisons show that the proposed approach outperforms the existing estimators. It is also noticed that the proposed algorithm is much more computationally efficient. Consequently, the proposed method is a promising blind channel estimation candidate for MIMO-OFDM systems.
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