| MIMO-OFDM系统中一种有效的信道估计方法 |
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| 引用本文： | 葛利嘉,李红军.MIMO-OFDM系统中一种有效的信道估计方法[J].重庆工学院学报,2008,22(5):58-64. |
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| 作者姓名： | 葛利嘉 李红军 |
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| 作者单位： | 重庆大学通信工程学院 重庆400044 |
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| 摘 要： | 提出了一种MIMO-OFDM(Multiple Input and Multiple Output-Orthogonal Frequency Division Multi-plexing)系统中的信道估计实现方案.该算法采用STBC(Space-Time Block Code)训练序列,利用LMS(Least Mean Square)迭代算法估计信道响应,避免了矩阵的求逆运算,与基于MMSE(Minimum MeanSquare Error)的MIMO信道估计算法相比,具有运算复杂度低、跟踪能力强的优点.计算机仿真结果显示了该算法的有效性和优越性.
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| 关 键 词： | 多输入多输出正交频分复用 空时分组码 信道估计 迭代LMS算法 |
An Efficient Channel Estimation Method for MIMO-OFDM Systems |
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| GE Li-jia,LI Hong-jun.An Efficient Channel Estimation Method for MIMO-OFDM Systems[J].Journal of Chongqing Institute of Technology,2008,22(5):58-64. |
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| Authors: | GE Li-jia LI Hong-jun |
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| Abstract: | An accurate channel estimation is crucial for the performance of multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM)systems.In this paper,a simple channel estimation method for a MIMO-OFDM system is presented,which uses LMS(Least Mean Square) iterative algorithm using the STBC(Space Time Block Coded) training blocks.Compared with the channel estimator algorithm based on MMSE(Minimum Mean Square Error),this method offers a lower complexity and a better ability to track the channels.Finally the validity and advantages of the method proposed are demonstrated in the numerical results. |
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| Keywords: | multiple input and multiple output-orthogonal Frequency division multiplexing(MIMO-OFDM) space-time block code(STBC) channel estimation LMS(Least Mean Square) iterative algorithm |
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