| 基于子空间法的盲信道和半盲信道估计方法 |
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| 引用本文： | 于蕾,杨莘元. 基于子空间法的盲信道和半盲信道估计方法[J]. 北京邮电大学学报, 2008, 31(3): 29-32 |
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| 作者姓名： | 于蕾 杨莘元 |
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| 作者单位： | 哈尔滨工程大学,信息与通信工程学院,哈尔滨,150001;哈尔滨工程大学,信息与通信工程学院,哈尔滨,150001 |
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| 摘 要： | 为了降低算法的复杂度，提出采用降秩正交迭代方法估计噪声子空间. 利用色噪声预白化技术对过采样后的自相关矩阵进行变换，再用降秩迭代计算噪声子空间. 在进行预白化时，提出一种利用训练序列估计色噪声协方差矩阵的方法，从而改善了盲信道估计收敛速度慢的缺点. 仿真结果证明，系统的信道冲激响应可以被良好地跟踪.
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| 关 键 词： | 多输入多输出 正交频分复用系统 信道估计 半盲算法 |
| 收稿时间： | 2007-11-25 |
Blind and Semi-Blind Channel Estimation Based on Subspace |
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| YU Lei,YANG Shen-yuan. Blind and Semi-Blind Channel Estimation Based on Subspace[J]. Journal of Beijing University of Posts and Telecommunications, 2008, 31(3): 29-32 |
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| Authors: | YU Lei YANG Shen-yuan |
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| Affiliation: | Information and Communication Engineering College, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | A new channel estimation based on subspace in two multiple input multiple output （MIMO-OFDM） systems is discussed. The proposed method estimates noise subspace with reduced-rank orthogonal iteration for low computational complexity. The over-sampled autocorrelation matrix is transformed by colored noise whitening. A new method to estimate colored noise covariance matrix with training sequences is developed for improving the convergence rate of channel estimation. Simulation results illustrate that the proposed method can get good performance. |
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| Keywords: | multiple input multiple output orthogonal frequency division multiplexing channel estimation semi-blind method |
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